The SCA Web Service binding specified in this document
applies to the services and references of composites and components [SCA-Assembly]. It defines the manner in which a
service can be made available as a web service, and in which a reference can
invoke a web service.
This binding is a WSDL-based binding; that means it either
references an existing WSDL binding or can be configured to specify enough
information to generate one. When an existing WSDL binding is not referenced,
rules defined in this document specify how to generate a WSDL binding. This
specification only defines a binding using WSDL 1.1.
The Web Service binding can point to an existing WSDL [WSDL11] document, separately authored, that specifies the
details of the WSDL binding to be used to provide or invoke the web service.
In this case the SCA web services binding allows anything that is valid in a
WSDL binding, including rpc-encoded style and binding extensions. It is the
responsibility of the SCA system provider to ensure support for all options
specified in the WSDL binding. Interoperation of such services is not
guaranteed.
The SCA Web Service binding also provides attributes that
can be used to provide the details of a WSDL SOAP binding. This allows a WSDL
document to be synthesized in the case that one does not already exist. In this
case only WS-I compliant mapping is supported.
The SCA Web Service binding can be further customized
through the use of SCA Policy Sets. For example, a requirement to conform to a
WS-I profile [WSI-Profiles] could be represented
with a policy set.
The key words “MUST”, “MUST NOT”, “REQUIRED”, “SHALL”,
“SHALL NOT”, “SHOULD”, “SHOULD NOT”, “RECOMMENDED”, “MAY”, and “OPTIONAL” in
this document are to be interpreted as described in [RFC2119].
This specification uses predefined namespace prefixes
throughout; they are given in the following list. Note that the choice of any
namespace prefix is arbitrary and not semantically significant.
|
Prefix
|
Namespace
|
Notes
|
|
xs
|
"http://www.w3.org/2001/XMLSchema"
|
Defined by XML Schema 1.0 specification
|
|
wsa
|
"http://www.w3.org/2005/08/addressing"
|
Defined by WS-Addressing 1.0
|
|
wsp
|
"http://www.w3.org/ns/ws-policy"
|
Defined by WS-Policy 1.5
|
|
soap
|
Can be either
"http://schemas.xmlsoap.org/soap/envelope/" or "http://www.w3.org/2003/05/soap-envelope"
|
Defined by SOAP 1.1 or SOAP 1.2
|
|
wsdli
|
"http://www.w3.org/ns/wsdl-instance"
|
Defined by WSDL 2.0
|
|
wsoap11
|
"http://schemas.xmlsoap.org/wsdl/soap/"
|
Defined by WSDL 1.1 [WSDL11]
|
|
wsoap12
|
"http://schemas.xmlsoap.org/wsdl/soap12/"
|
Defined by [W11-SOAP12]
|
|
sca
|
"http://docs.oasis-open.org/ns/opencsa/sca/200912"
|
Defined by the SCA specifications
|
Table 1‑1: Prefixes and Namespaces Used in this
Specification
[RFC2119] S.
Bradner, Key words for use in RFCs to Indicate Requirement Levels, http://www.ietf.org/rfc/rfc2119.txt,
IETF RFC 2119, March 1997.
[SCA-Assembly] OASIS
Committee Specification Draft 07, Service Component Architecture Assembly
Model Specification Version 1.1, January 2011
http://docs.oasis-open.org/opencsa/sca-assembly/sca-assembly-1.1-spec-csd07.pdf
[SCA-Policy] SCA Policy Framework Version 1.1. 05
December 2011. OASIS Committee Specification Draft 05 / Public Review Draft 03.
http://docs.oasis-open.org/opencsa/sca-policy/sca-policy-1.1-spec-csprd03.html.
[SCA-JCAA] Service
Component Architecture SCA-J Common Annotations and APIs Specification Version
1.1. 15 August 2011. OASIS Committee Specification Draft 06 / Public Review
Draft 04. http://docs.oasis-open.org/opencsa/sca-j/sca-javacaa-1.1-spec-csprd04.html
[WSDL11] E. Christensen et al, Web Service
Description Language (WSDL) 1.1, http://www.w3.org/TR/2001/NOTE-wsdl-20010315,
W3C Note, March 15 2001.
[WSDL20] Chinnici
et al, Web Service Description Language (WSDL) Version 2.0 Part 1: Core
Language, http://www.w3.org/TR/2007/REC-wsdl20-20070626/,
W3C Recommendation, June 26 2007.
[WSI-Profiles] “Basic Profile Version
1.1”
http://www.ws-i.org/Profiles/BasicProfile-1.1.html,
“Attachments Profile Version
1.0”
http://www.ws-i.org/Profiles/AttachmentsProfile-1.0.html,
“Simple SOAP Binding Profile Version
1.0”
http://www.ws-i.org/Profiles/SimpleSoapBindingProfile-1.0.html,
“Basic Security Profile Version 1.0”
http://www.ws-i.org/Profiles/BasicSecurityProfile-1.0.html
[JAX-WS] “JSR 224: JavaTM API for XML-Based Web Services (JAX-WS) 2.0” http://jcp.org/en/jsr/detail?id=224
[SOAP11] Box et al,
“Simple Object Access Protocol (SOAP) 1.1” http://www.w3.org/TR/2000/NOTE-SOAP-20000508/,
W3C Note May 2000
[SOAP] Gudgin et al,
“SOAP Version 1.2 Part 1: Messaging Framework” http://www.w3.org/TR/2003/REC-soap12-part1-20030624/,
W3C Recommendation June 2003; Box et al, “Simple Object Access Protocol (SOAP) 1.1” http://www.w3.org/TR/2000/NOTE-SOAP-20000508/,
W3C Note May 2000
[SOAP12Adjuncts] Gudgin
et al, “SOAP Version 1.2 Part 2: Adjuncts (Second Edition)”
http://www.w3.org/TR/soap12-part2/,
W3C Recommendation April 2007
[WS-Addr] Gudgin et al, “Web Services Addressing 1.0 – Core” http://www.w3.org/TR/2006/REC-ws-addr-core-20060509/,
W3C Recommendation May 2006
[W11-SOAP12] Angelov
et al, “WSDL 1.1 Binding Extension for SOAP 1.2” http://www.w3.org/Submission/wsdl11soap12/, W3C Member Submission April
2006
[WS-Addr-SOAP] Gudgin
et al, “Web Services Addressing 1.0 – SOAP Binding” http://www.w3.org/TR/2006/REC-ws-addr-soap-20060509/, W3C Recommendation May 2006
[WS-MC] OASIS Standard “Web Services Make Connection
(WS-MakeConnection) Version 1.1”, February 2009
http://docs.oasis-open.org/ws-rx/wsmc/200702/wsmc-1.1-spec-os.doc
[WS-Policy] Vedamuthu et al, “Web Services Policy 1.5 – Framework” http://www.w3.org/TR/2007/REC-ws-policy-20070904, W3C Recommendation September
2007
[WS-PA] Vedamuthu et al, “Web Services Policy 1.5 –
Attachment” http://www.w3.org/TR/2007/REC-ws-policy-attach-20070904, W3C Recommendation September
2007
[WSI-AP] “Attachments Profile Version 1.0”
http://www.ws-i.org/Profiles/AttachmentsProfile-1.0.html
[MTOM] Gudgin et al,
“SOAP Message Transmission Optimization Mechanism” http://www.w3.org/TR/2005/REC-soap12-mtom-20050125/,
W3C Recommendation January 2005
[WS-Security] Oasis Standard “Web Services Security: SOAP Message Security 1.1
(WS-Security 2004)” February 2006 http://docs.oasis-open.org/wss/v1.1/wss-v1.1-spec-os-SOAPMessageSecurity.pdf
[WS-Testcases] TestCases
for the SCA Web Service Binding Specification Version 1.1. Latest version. http://docs.oasis-open.org/opencsa/sca-bindings/sca-wsbinding-1.1-testcases.html
The naming conventions used by artefacts defined in this
specification are:
·
The naming conventions defined by section 1.3 of the Assembly
Specification [SCA-Assembly].
·
Where the names of elements and attributes consist partially or
wholly of acronyms, the letters of the acronyms use the same case. When the
acronym appears at the start of the name of an element or an attribute, or
after a period, it is in lower case. If it appears elsewhere in the name of an
element or an attribute, it is in upper case. For example, an attribute might
be named "uri" or "jndiURL".
·
Where the names of types consist partially or wholly of acronyms,
the letters of the acronyms are in all upper case. For example, an XML Schema
type might be named "JCABinding" or "MessageID".
·
Values, including local parts of QName values, follow the rules
for names of elements and attributes as stated above, with the exception that
the letters of acronyms are in all upper case. For example, a value might be
"JMSDefault" or "namespaceURI".
TestCases for SCA Web Service Binding Specification Version
1.1 [WS-Testcases] defines test cases for this
specification. The TestCases represent a series of tests that SCA runtimes are
expected to pass in order to claim conformance to the requirements of this
specification.
The Web Service binding element is defined by the
pseudo-schema in Snippet 2‑1.
<binding.ws
name="xs:NCName"?
requires="list of xs:QName"?
policySets="list of xs:QName"?
uri="xs:anyURI"?
wsdlElement="xs:anyURI"?
wsdli:wsdlLocation="list of xs:anyURI pairs"? >
<wireFormat ... />?
<operationSelector ... />?
<wsa:EndpointReference>...</wsa:EndpointReference>*
</binding.ws>
Snippet 2‑1: binding.ws Pseudo-Schema
The binding.ws element has the
attributes:
·
/binding.ws/@name - as defined in the SCA Assembly
Specification [SCA-Assembly].
·
/binding.ws/@requires - as defined in the SCA
Assembly Specification [SCA-Assembly].
·
/binding.ws/@policySets - as defined in the SCA
Assembly Specification [SCA-Assembly].
·
/binding.ws/@uri - the endpoint URI resolution algorithm of
Section 2.2 describes how this attribute is interpreted. For an SCA reference, the @uri attribute MUST be an
absolute value. [BWS20001]
·
/binding.ws/@wsdlElement – when present this
attribute specifies the URI of a WSDL element. The
value of the @wsdlElement attribute MUST identify an element in an existing
WSDL 1.1 document. [BWS20002]
The URI can have the following forms:
–
Service:
<WSDL-namespace-URI>#wsdl.service(<service-name>)
If the binding is for an SCA service, the wsdlElement
attribute MUST NOT specify the wsdl.service form of URI. [BWS20003]
If the binding is for an SCA reference, the set of
available ports for the reference consists of the ports in the WSDL service
that have portTypes which are compatible supersets of the SCA reference as
defined in the SCA Assembly Model specification [SCA-Assembly]
and satisfy all the policy constraints of the binding.
If the wsdl.service form of wsdlElement
is used on an SCA reference binding, the set of available ports for that
reference binding MUST be non-empty. [BWS20004] The set of available ports represents a
single SCA reference binding with respect to the multiplicity of that SCA
reference. If the wsdl.service form of wsdlElement
is used on an SCA reference binding, the SCA runtime MUST raise an error if
there are no available ports that it supports. [BWS20005] When an
invocation is made using an SCA reference binding with the wsdl.service
form of wsdlElement, the SCA runtime MUST use exactly one port from the
set of available ports for the reference (with port selection on a
per-invocation basis permitted). [BWS20006]
–
Port:
<WSDL-namespace-URI>#wsdl.port(<service-name>/<port-name>)
If the binding is for an SCA service, the portType
associated with the specified WSDL port MUST be compatible with the SCA service
interface as defined in section 2.1, and the port MUST satisfy all the policy
constraints of the binding.[BWS20007]
The SCA runtime MUST expose an endpoint for
the specified WSDL port, or raise an error if it does not support the WSDL
port. [BWS20008] If the binding is for
an SCA reference, the portType associated with the specified WSDL port MUST be
a compatible superset of the SCA reference interface as defined in the SCA
Assembly Model specification [SCA-Assembly], and the port MUST satisfy all the
policy constraints of the binding. [BWS20009] The
SCA runtime MUST use the specified WSDL port for invocations made using the SCA
reference binding, or raise an error if it does not support the WSDL port.
[BWS20010]
–
Binding:
<WSDL-namespace-URI>#wsdl.binding(<binding-name>)
If the binding is for an SCA service, the portType
associated with the specified WSDL binding MUST be compatible with the SCA
service interface as defined in section 2.1, and the WSDL binding MUST satisfy
all the policy constraints of the binding. [BWS20011] The SCA
runtime MUST expose an endpoint for the specified WSDL binding, or raise an
error if it does not support the WSDL binding. [BWS20012]
If the binding is for an SCA reference, the portType
associated with the specified WSDL binding MUST be a compatible superset of the
SCA reference interface as defined in the SCA Assembly Model specification [SCA-Assembly],
and the WSDL binding MUST satisfy all the policy constraints of the binding.
[BWS20013] The SCA runtime MUST use the specified WSDL binding
for invocations made using the SCA reference binding, or raise an error if it
does not support the WSDL binding. [BWS20014]
When the wsdl.binding form of wsdlElement
is used , the endpoint address URI for an SCA reference MUST be specified by
either the @uri attribute on the binding or a WS-Addressing wsa:EndpointReference
element, except where the SCA Assembly Model specification [SCA-Assembly] states that the @uri
attribute can be omitted. [BWS20015]
·
/binding.ws/@wsdli:wsdlLocation – when present this
attribute specifies the location(s) of the WSDL document(s) associated with
specific namespace(s).
The @wsdli:wsdlLocation attribute can be used in the
event that the <WSDL-namespace-URI> value in the @wsdlElement attribute
is not dereferencable, or when the intended WSDL document is to be found at a
different location than the one pointed to by the <WSDL-namespace-URI>.
The semantics of this attribute are specified in Section 7.1 of WSDL 2.0 [WSDL20].
If the @wsdli:wsdlLocation attribute is used
the @wsdlElement attribute MUST also be specified. [BWS20017]
The value of the
@wsdli:wsdlLocation attribute MUST identify an existing WSDL 1.1 document.
[BWS20018]
·
/binding.ws/wireFormat – as defined in the SCA
Assembly Specification [SCA-Assembly]. This
specification does not define any new wireFormat elements.
·
/binding.ws/operationSelector – as defined in the
SCA Assembly Specification [SCA-Assembly]. This
specification does not define any new operationSelector elements.
·
/binding.ws/wsa:EndpointReference – when present
this element provides the WS-Addressing [WS-Addr]
wsa:EndpointReference that specifies the endpoint for the service or reference.
A binding.ws element MUST
NOT contain more than one of any of the following: the @uri attribute; the
@wsdlElement attribute referring to a WSDL port or to a WSDL service; the
wsa:EndpointReference element. [BWS20019]
The endpoint address URI for an SCA service or the callback
element of an SCA reference is determined as specified by endpoint URI resolution in section 2.2. For the callback element of an SCA service,
the binding MUST NOT specify an endpoint address URI or a WS-Addressing
wsa:EndpointReference. [BWS20020]
The SCA runtime MUST support all the attributes of
the <binding.ws> element, namely @name, @uri, @requires, @policySets,
@wsdlElement, and @wsdli:wsdlLocation.[BWS20021]
The SCA runtime SHOULD support the element
<wsa:EndpointReference>. [BWS20022] If an SCA
runtime does not support the element <wsa:EndpointReference>, then it
MUST reject an SCA WS Binding XML document (as defined in Section 5.1) that
contains the element. [BWS20023]
The <binding.ws> element MUST conform to the
XML schema defined in sca-binding-webservice-1.1.xsd. [BWS20024]
A WSDL portType is compatible with an SCA service interface
if and only if all of these conditions are satisfied:
1.
The SCA service interface is remotable.
2.
The operations on the portType are the same as the operations on the SCA
service interface, with the same operation name, same input types (taking order
as significant), same output types (taking order as significant), and same
fault/exception types. If the SCA service interface is not a WSDL portType,
it is mapped to a WSDL portType for the purposes of this comparison. The
mapping is defined in the relevant SCA specification for the interface
type. If the interface cannot be mapped to WSDL, the SCA service
interface is not compatible with the WSDL portType.
3.
WSDL 1.1 message parts can point either to an XML Schema element
declaration or to an XML Schema type declaration. When determining
compatibility between two WSDL operations, a message part that points to an XML
Schema element is considered to be incompatible with a message part that points
to an XML Schema type.
4.
If either the portType or the SCA service interface declares an SCA
callback interface, then both the portType and the SCA service interface
declare callback interfaces and these callback interfaces are compatible
according to points 1 through 3 above.
2.2 Endpoint URI resolution
This specification does not mandate any particular way to
determine the URI for a web services binding on an SCA service. An absolute
URI can be indicated by the @uri attribute, by the URI in a wsa:Address element
within an wsa:EndpointReference element, or by the URI indicated in a WSDL port
via a @wsdlElement attribute. Implementations can use the specified URI as the
service endpoint URI or they can use a different URI which might include
portions of the specified URI. For example, the service endpoint URI might be
produced by modifying any or all of the host name, the port number, and a
portion of the path.
Note that if no absolute URI is indicated by any of these elements,
implementations can use the structural URI for the binding as a portion of the
URI for the eventual deployed endpoint. In addition, the @uri attribute value
could be relative; implementations are encouraged to combine this value with
the structural URI for the service in determining a deployed URI.
The target address for a reference binding is defined as one
of:
A.
The value of the @uri attribute
B.
The value of the wsa:Address element of the wsa:EndpointReference
element
C.
The value of the address element of the WSDL port referenced by the
@wsdlElement attribute
D.
The value of the address element of one of the set of available WSDL
ports as specified under the definition of the @wsdlElement attribute when it
references a WSDL service element
If there is no target
address for a reference binding, the SCA runtime MUST raise an error. [BWS20025]
For a reference binding, the
SCA runtime MUST use the target address. [BWS20026]
When binding.ws is
used on a service or reference with an interface that is not defined by interface.wsdl,
the SCA runtime MUST derive a WSDL portType for the service or reference from
the interface using the WSDL-mapping rules defined for that SCA interface type.
[BWS20027]
An SCA runtime MUST raise an
error if the interface on a service or reference element with a binding.ws
element does not map to a WSDL portType. [BWS20028]
For example, for interface.java, the mapping to a
WSDL portType is as defined in the SCA Java Common Annotations and API
Specification [SCA-JCAA].
binding.ws implementations can use appropriate
standards, for example WS-I AP 1.0 [WSI-AP] or MTOM [MTOM], to map interface parameters to binary attachments
transparently to the target component.
2.4
Production of WSDL description for an SCA service
Any service hosted by an SCA runtime with one or more web
service bindings with HTTP endpoints is strongly encouraged to return a WSDL
description of the service in response to an HTTP GET request with the ?wsdl
suffix added to that HTTP endpoint URL. Regardless of the protocol supported by
an SCA service endpoint using the web services binding, the SCA runtime is
strongly encouraged to provide some means of obtaining the WSDL description of
the service. This can include out of band
mechanisms, for example publication to a UDDI registry.
Refer to the Transport Binding
section 4 for a detailed definition of the rules that are used for
generating the WSDL description of an SCA service with one or more web service
bindings.
2.5
Additional binding configuration data
SCA runtime implementations can provide additional metadata
that is associated with a web service binding. This is done by providing
extension points in the schema; refer to Appendix A: Web
Services XML Binding Schema for the locations of these extension points.
This can be used for example to enable JAX-WS [JAX-WS] handlers to be executed as part of the target
component dispatch. The specification of such metadata is SCA runtime-specific
and is outside of the scope of this document.
2.6
Web Service Binding and SOAP Intermediaries
The Web Service binding does not provide any direct or
explicit support for SOAP intermediaries [SOAP].
2.7
Support for WSDL extensibility
When a binding.ws element uses the @wsdlElement attribute,
the details of the binding are specified by the WSDL element referenced by the
value of the attribute. Per the WSDL specification, WSDL allows for
extensibility via elements as well as attributes, and it specifies rules for
processing such elements. This specification does not constrain the use of such
extensibility in WSDL and relies on the rules specified in the WSDL
specification for processing such extended elements.
An SCA runtime MUST support
the WSDL extensions defined in the namespace associated with the prefix
"sca" (as defined in section 1.1). [BWS20032]
The SCA runtime MUST support
the WSDL 1.1 binding extension for SOAP 1.1 over HTTP [WSDL11], as identified by the WSDL
element wsoap11:binding that has the @transport attribute with a value of
"http://schemas.xmlsoap.org/soap/http". [BWS20033]
The SCA runtime can support the WSDL 1.1 binding extension
for SOAP 1.2 over HTTP [W11-SOAP12], as identified by
the WSDL element wsoap12:binding that has the @transport attribute with a value
of "http://schemas.xmlsoap.org/soap/http". Because a WSDL document
might contain extension elements that cannot be supported by the SCA runtime,
when using the @wsdlElement form of binding.ws it is not possible to determine
whether the binding is supported by the SCA runtime without parsing the
referenced WSDL element and its dependent elements.
This specification places no requirements on the intents [SCA-Policy] that are listed as either @alwaysProvides or
@mayProvides in the bindingType for binding.ws.
This binding mandates support for SOAP 1.1 and encourages
SOAP 1.2 support. The <bindingType>
element associated with this binding MUST include the SOAP.v1_1 intent in its
@mayProvides or @alwaysProvides attributes. [BWS20035] Where
the binding implementation provides support for SOAP 1.2 over HTTP described
above, it is good practice for the <bindingType> element associated with
this binding to include the SOAP.v1_2 intent in its @mayProvides attribute. For more details on the <bindingType> element
see [SCA-Policy].
The SCA runtime MUST raise an error if a web service
binding is configured with a policy intent(s) that conflicts with the binding
instance's configuration. [BWS20037]
For example, it is an error to use the SOAP policy intent in
combination with a WSDL binding that does not use SOAP.
The following snippets show the sca.composite file for the
MyValueComposite file containing the service element for the MyValueService and
reference element for the StockQuoteService. Both the service and the reference
use a Web Service binding.
3.1
Example Using WSDL documents
Snippet 3‑1 shows a service and reference using the
SCA Web Service binding, using existing WSDL documents in both cases. In each
case there is a single binding element, whose name defaults to the
service/reference name.
The service’s binding is defined by the WSDL document
associated with the given URI. This service conforms to WS-I Basic Profile
1.1.
The first reference’s binding is defined by the specified
WSDL service in the WSDL document at the given location. The reference can use
any of the WSDL service’s ports to invoke the target service. The second
reference’s binding is defined by the specified WSDL binding. The specific
endpoint URI to be invoked is provided via the @uri attribute.
<?xml version="1.0"
encoding="ASCII"?>
<composite xmlns="http://docs.oasis-open.org/ns/opencsa/sca/200912"
name="MyValueComposite">
<service name="MyValueService">
<interface.java
interface="services.myvalue.MyValueService"/>
<binding.ws
wsdlElement="http://www.example.org/MyValueService#
wsdl.binding(MyValueService/MyValueServiceSOAP)"/>
...
</service>
...
<reference name="StockQuoteReference1">
<interface.java
interface="services.stockquote.StockQuoteService"/>
<binding.ws
wsdlElement="http://www.example.org/StockQuoteService#
wsdl.service(StockQuoteService)"
wsdli:wsdlLocation="http://www.example.org/StockQuoteService
http://www.example.org/StockQuoteService.wsdl"/>
</reference>
<reference name="StockQuoteReference2">
<interface.java
interface="services.stockquote.StockQuoteService"/>
<binding.ws
wsdlElement="http://www.example.org/StockQuoteService#
wsdl.binding(StockQuoteBinding)"
wsdli:wsdlLocation="http://www.example.org/StockQuoteService
http://www.example.org/StockQuoteService.wsdl"
uri="http://www.example.org/StockQuoteService5"/>
</reference>
</composite>
Snippet 3‑1: Example Binding with a WSDL Document
Snippet 3‑2 shows the simplest form of the binding
element without WSDL document, assuming all defaults for portType mapping and
SOAP binding synthesis. The service and reference each have a single binding
element, whose name defaults to the service/reference name.
The service is to be made available at a location determined
by the deployment of this component. It will have a single port address and
SOAP binding, with a simple WS-I BasicProfile 1.1 compliant binding, and using
the default options for mapping the Java interface to a WSDL portType.
The reference indicates a service to be invoked which has a
SOAP binding and portType that matches the default options for binding
synthesis and interface mapping. One particular use of this case would be
where the reference is to an SCA service with a web service binding which
itself uses all the defaults.
<?xml version="1.0"
encoding="ASCII"?>
<composite
xmlns="http://docs.oasis-open.org/ns/opencsa/sca/200912"
name="MyValueComposite">
<service name="MyValueService">
<interface.java
interface="services.myvalue.MyValueService"/>
<binding.ws/>
...
</service>
...
<reference name="StockQuoteService">
<interface.java
interface="services.stockquote.StockQuoteService"/>
<binding.ws
uri="http://www.example.org/StockQuoteService"/>
</reference>
</composite>
Snippet 3‑2: Example Binding without a WSDL Document
Snippet 3‑3 shows the use of the binding element
without a WSDL document, with multiple SOAP bindings with non-default values.
The SOAP 1.2 binding name defaults to the service name, the SOAP 1.1 binding is
given an explicit name. The reference has a web service binding which uses
SOAP 1.2, but otherwise uses all the defaults for SOAP binding. The reference
binding name defaults to the reference name.
<?xml version="1.0"
encoding="ASCII"?>
<composite
xmlns="http://docs.oasis-open.org/ns/opencsa/sca/200912"
name="MyValueComposite">
<service name="MyValueService">
<interface.java
interface="services.myvalue.MyValueService"/>
<binding.ws name="MyValueServiceSOAP11"
requires="SOAP.v1_1"/>
<binding.ws requires="SOAP.v1_2"/>
...
</service>
...
<reference name="StockQuoteService">
<interface.java
interface="services.stockquote.StockQuoteService"/>
<binding.ws
uri="http://www.example.org/StockQuoteService"
requires="SOAP.v1_2"/>
</reference>
</composite>
Snippet 3‑3: Example Binding with Multiple SOAP Bindings
The binding.ws element provides numerous ways to specify
exactly how messages ought to be transmitted from or to the reference or
service. Those ways include references to WSDL binding elements from the
@wsdlElement attribute, policy intents, and even vendor extensions within the
binding.ws element. This section describes the defaults to be used if the
specific transport details are not otherwise specified.
So as to narrow the range of choices for how messages are
carried, these policy intents affect the transport binding:
·
SOAP
When the SOAP intent
is required, the SCA runtime MUST transmit and receive messages using SOAP. One
or more SOAP versions can be used. [BWS40001]
·
SOAP.v1_1
When the SOAP.v1_1
intent is required, the SCA runtime MUST transmit and receive messages using
only SOAP 1.1. [BWS40002]
·
SOAP.v1_2
When the SOAP.v1_2
intent is required, the SCA runtime MUST transmit and receive messages using only
SOAP 1.2. [BWS40003]
To align to WS-I Basic Profile, the resulting WSDL port
needs to be all document-literal, or all rpc-literal binding (per WS-I Basic
Profile 1.1 R2705 [WSI-Profiles]). This means, for
any given portType, for all messages referenced by all operations in that
portType, either
·
that every message part references an XML Schema type
(rpc-literal pattern)
·
or that every message references exactly zero or one XML Schema
elements (document-literal pattern)
For an SCA service or reference element, the portType
from the service's or reference’s interface or derived from that interface MUST
follow either the rpc-literal pattern or the document-literal pattern. [BWS40004]
The rest of this section assumes the short-hand reference of
a "rpc-literal" or "document-literal" pattern, depending on
which of the two bullet points above it matches.
The default transport binding rules for the Web
Service binding are:
·
HTTP-based transfer protocol;
·
SOAP 1.1 binding;
·
"literal" format as described in section 3.5 of [WSDL11];
·
Either the document literal or rpc literal pattern, depending on
the service or reference interface as described in section 4.2.1;
–
For document literal pattern, each message uses "document"
style, as per section 3.5 of [WSDL11];
–
For rpc-literal pattern, each message uses "rpc" style, as per
section 3.5 of [WSDL11] and the child elements of the
SOAP Body element are namespace qualified with a non-empty namespace name;
·
For SOAP 1.1 messages, the SOAPAction HTTP header described in
section 6.1.1 of [SOAP11] represents the empty string, in
quotes ("");
·
For SOAP 1.2 messages, the SOAP Action feature described in
section 6.5 of [SOAP12Adjuncts] does not appear;
·
All WSDL message parts are carried in the SOAP body.
In the event that the
transport details are not determined by use of the @wsdlElement attribute, @uri
attribute, wsa:EndpointReference element, policy intents, policy sets or
extensions to the binding.ws element, an SCA runtime MUST enable the default
transport binding rules. [BWS40005]
When using the default transport binding rules, the SCA
runtime can provide additional WSDL bindings, unless policy is applied that
explicitly restricts this.
When using the default transport binding rules with
the rpc-literal pattern, the SCA runtime MUST use the structural URI associated
with the binding as the namespace of the child elements of the SOAP body
element. [BWS40007]
5 Implementing
SCA Callbacks using Web Services
This section defines a SOAP- and WS-Addressing-based SCA Web
Services callback protocol that can be used to implement a bidirectional
interface [SCA-Assembly]. For examples of wire
messages exchanged when using this protocol see Appendix E.
The protocol involves two communicating parties: a Service
that implements the SCA bidirectional interface using Web services (WSCB Service)
and a client that invokes the SCA bidirectional interface using Web services
(WSCB Client). The WSCB Service implements the forward interface and the WSCB
Client implements the callback interface. SCA Web Services Callback Protocol
involves the following rules.
1.
Every request message from the WSCB
Client that invokes the forward interface MUST contain a Callback EPR. [BWS50002] If the request
message contains the wsa:From SOAP
header block then the wsa:From header
block specifies the Callback EPR. If the wsa:From
header block is not present then the wsa:ReplyTo
header block specifies the Callback EPR.
If the Callback EPR's
[address] value is "http://www.w3.org/2005/08/addressing/anonymous" or "http://www.w3.org/2005/08/addressing/none" then the WSCB Service MUST generate the Invalid
Addressing Header fault as specified in Section 6.4.1 of [WS-Addr-SOAP].
[BWS50004] Such a
fault can include additional [Subsubcode]
wsa:OnlyNonAnonymousAddressSupported.
2.
A request message that invokes the forward interface can contain the wsa:MessageID SOAP header block. If
there is a need to have the callback request message correlated to an
individual forward request message, the wsa:MessageID
SOAP header block can be used for this purpose.
3.
When the WSCB Service invokes the
callback interface, it MUST use the Callback EPR from a request message that
invoked the forward interface. [BWS50005] Once the Callback EPR is selected, the WSCB Service
MUST follow the rules defined in Section 3.3 of [WS-Addr] to invoke operations
on the callback interface. [BWS50006]
When the WSCB Service
invokes the callback interface, if the request message from which the Callback
EPR was obtained contained the wsa:MessageID
SOAP header block, the WSCB Service MUST include a wsa:RelatesTo SOAP header block in the callback message. [BWS50007] The wsa:RelatesTo SOAP
header block MUST have the relationship type value of "http://docs.oasis-open.org/opencsa/sca-bindings/ws/callback" and the related message id MUST be the wsa:MessageID of the message from which the Callback EPR was
obtained. [BWS50008]
If the request message from
which the Callback EPR was obtained did not contain the wsa:MessageID SOAP header block, the WSCB Service MUST NOT include
a wsa:RelatesTo SOAP header block with a relationship type value of "http://docs.oasis-open.org/opencsa/sca-bindings/ws/callback"
in the callback message. [BWS50009]
When a service that offers a bidirectional interface is
invoked, depending on the semantics and/or implementation of the service, it is
possible that the service might invoke the callback interface before the
forward operation ends. In such cases, it is necessary for the binding on the
reference-side to be listening for callback request(s) from the service, before
the forward operation request is sent on the wire to the service, and continue
listening as long as callback requests are expected. It is possible that before
the response to the forward request is sent a response to one or more callback
requests are required by the service.
It is possible that the invoker of a service that uses a
bidirectional interface has a binding that cannot accept connections for
callbacks from a service (for example, when it has the noListener intent [SCA-Policy]).
When this is the case, it is necessary for the binding to support a polling
mechanism. An example of a polling mechanism is WS-MakeConnection [WS-MC]. This section describes the use of the SCA Web
Services Callback Protocol in conjunction with WS-MakeConnection. For examples
of wire messages exchanged when using the SCA Web Services Callback protocol in
conjunction with WS-MakeConnection see Appendix E.1.
When the SCA Web Services Callback protocol is implemented
in conjunction with WS-MakeConnection, it has to adhere to the rules described
for the SCA Web Services Callback Protocol and also to those of
WS-MakeConnection.
The Callback EPR's [address] value present in the request
message that invoked the forward interface follows the form of the
MakeConnection Anonymous URI, i.e. "http://docs.oasis-open.org/ws-rx/wsmc/200702/anonymous?id={unique-String}".
The unique-String value is a globally unique value such as a
UUID, as defined by the WS-MakeConnection specification.
When the service implementation invokes the callback
interface, it uses the Callback EPR from a request message that invoked the
forward interface, and the callback request message is sent as the response to
a wsmc:MakeConnection message that
contains the wsmc:Address value
that matches the MakeConnection Anonymous URI in the Callback EPR.
When a service that offers a bidirectional interface is
invoked using WS-MakeConnection Anonymous URI as the value for the Callback EPR
address, depending on the semantics and/or implementation of the service, it is
possible that the service might invoke the callback interface before the
forward operation ends. In such cases, it is necessary for the binding on the
reference-side to start polling for callback request(s) from the service,
before or right after the forward operation request is sent and before a
response is received, and continue polling as long as callback requests are
expected. It is possible that before the response to the forward request is
sent a response to one or more callback requests are required by the service.
WS-Policy Framework [WS-Policy] and
WS-Policy Attachment [WS-PA] collectively define a
framework, model and grammar for expressing the requirements, and general
characteristics of entities in an XML Web services-based system. To enable a
Web service client and a Web service to describe their requirements for
implementing SCA Web Services Callback Protocol, this specification defines a
single policy assertion that leverages the WS-Policy framework.
The WSCallback policy
assertion indicates that the WSCB Client and the WSCB Service MUST use SCA Web
Services Callback Protocol to implement callbacks. [BWS50010] Specifically, the protocol determines
the requirements on the forward request message, the EPR used for callbacks and
the requirements on the callback request message.
The normative outline for the WSCallback assertion is:
<sca:WSCallback
...>
...
</sca:WSCallback>
Snippet 5‑1: WSCallback Assertion
The content model of the WSCallback element is:
·
/sca:WSCallback:
A policy assertion that specifies that SCA Web Services Callback protocol is
used when sending messages.
The WSCallback policy assertion can have the following
Policy Subjects [WS-PA]:
·
Endpoint Policy Subject
WS-PolicyAttachment defines a set of WSDL/1.1 policy
attachment points for each of the above Policy Subjects. Since a WSCallback
policy assertion specifies a concrete behavior, it cannot be attached to the
abstract WSDL policy attachment points.
The following is the list of WSDL/1.1 elements whose scope
contains the Policy Subjects allowed for a WSCallback policy assertion but
which cannot have WSCallback policy assertions attached: wsdlPortType
The following is the list of WSDL/1.1 elements whose scope
contains the Policy Subjects allowed for a WSCallback policy assertion and
which can have WSCallback policy assertions attached:
·
wsdl:port
·
wsdl:binding
Snippet 5‑2 the use of the WSCallback policy assertion
in a WSDL document.
(01)<wsdl:definitions
(02) targetNamespace="example.com"
(03) xmlns:tns="example.com"
(04)
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
(05) xmlns:wsp="http://www.w3.org/ns/ws-policy"
(06) xmlns:sca="http://docs.oasis-open.org/ns/opencsa/sca/200912"
(07)
xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
(08)
(09) <wsp:UsingPolicy wsdl:required="true" />
(10)
(11) <wsp:Policy wsu:Id="MyPolicy" >
(12) <sca:WSCallback/>
(13) </wsp:Policy>
(14)
(15) <!-- omitted elements -->
(16)
(17) <wsdl:binding name="MyBinding"
type="tns:MyPortType" >
(18) <wsp:PolicyReference URI="#MyPolicy" />
(19) <!-- omitted elements -->
(20) </wsdl:binding>
(21)
(22)</wsdl:definitions>
Snippet 5‑2: WSCallback Policy Asserion Used in a WSDL Document
Line (09) in Snippet 5‑2 indicates that WS-Policy is
in use as a required extension. Lines (11-13) are a policy expression that
includes a WSCallback policy assertion (line 12) to indicate that SCA Web
Services Callback protocol is used. Lines (17-20) are a WSDL binding. Line (18)
indicates that the policy in lines (11-13) applies to this binding,
specifically indicating that SCA Web Services Callback protocol is used over
all the messages in the binding.
It is good practice for Policies and Assertions to be signed
to prevent tampering. It is acceptable for an SCA runtime to reject a Policy
that is not signed or where there is no associated security token which
indicates that the signer has appropriate claims for the policy. That is, a
relying party shouldn't rely on a policy unless the policy is signed and
presented with sufficient claims to pass the relying parties acceptance
criteria.
Note that the mechanisms described in this document could be
secured as part of a SOAP message using WS-Security [WS-Security]
or embedded within other objects using object-specific security mechanisms.
The XML schema pointed to by the RDDL document at the
namespace URI, defined by this specification, are considered to be
authoritative and take precedence over the XML schema defined in the appendix
of this document.
This specification defines four targets for conformance:
a) SCA WS Binding XML Document
b) Web Service Callback Service (WSCB Service)
c) Web Service Callback Client (WSCB Client)
d) SCA Runtime
An SCA WS Binding XML document is an SCA Composite Document,
or an SCA ComponentType Document, as defined by the SCA Assembly specification
Section 13.1 [SCA-Assembly], that uses the
<binding.ws> element.
An SCA WS Binding XML document MUST be a conformant SCA
Composite Document or a SCA ComponentType Document, as defined by the SCA
Assembly specification [SCA-Assembly], and MUST
comply with all statements in Appendix C: Conformance
Items related to elements and attributes in an SCA WS Binding XML document,
notably all "MUST" statements have to be implemented.
A WSDL 1.1 portType element associated with an SCA service
or reference MUST NOT have the WSCallback policy assertion attached.
"associated with" is intended to cover both the referencing of a
concrete WSDL document from within an SCA XML document (by any element) and
also cover the dynamic creation and advertising of a WSDL by a runtime service.
An implementation that claims to conform to the requirements
of a WSCB Service defined in this specification MUST conform to all the
statements in Appendix C: Conformance Items related to
a WSCB Service.
An implementation that claims to conform to the requirements
of a WSCB Client defined in this specification MUST conform to all the
statements in Appendix C: Conformance Items related to
a WSCB Client.
An implementation that claims to conform to the requirements
of an SCA Runtime defined in this specification has to meet the following
conditions:
1.
The implementation MUST comply with all statements in Appendix C: Conformance Items related to an SCA Runtime,
except for those that originate from the Implementing
Callbacks section 5, notably all “MUST” statements have to be implemented.
2.
The implementation MUST conform to the SCA Assembly Model Specification
Version 1.1 [SCA-Assembly], and to the SCA Policy
Framework Version 1.1 [SCA-Policy].
3.
The implementation MUST reject a SCA WS Binding XML Document that is not
conformant per Section 6.1.
Note that when an SCA Runtime implementation claims to
conform to the SCA Web Services Callback Protocol, the implementation acts as a
WSCB Service/Client on behalf of an SCA component. In such a case the component
developer does not have to implement the protocol and can rely on the SCA
Runtime's support of the protocol.
Appendix A. Web
Services XML Binding Schema: sca-binding-ws-1.1.xsd (Normative)
<?xml
version="1.0" encoding="UTF-8"?>
<!--
Copyright(C) OASIS(R) 2005,2010. All Rights Reserved.
OASIS trademark, IPR and other policies apply. -->
<schema
xmlns="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://docs.oasis-open.org/ns/opencsa/sca/200912"
xmlns:sca="http://docs.oasis-open.org/ns/opencsa/sca/200912"
xmlns:wsdli="http://www.w3.org/ns/wsdl-instance"
xmlns:wsa="http://www.w3.org/2005/08/addressing"
elementFormDefault="qualified">
<import namespace="http://www.w3.org/ns/wsdl-instance"
schemaLocation="http://www.w3.org/2007/05/wsdl/wsdl20-instance.xsd"/>
<import namespace="http://www.w3.org/2005/08/addressing"
schemaLocation="http://www.w3.org/2006/03/addressing/ws-addr.xsd"/>
<include schemaLocation="sca-core-1.1-cd05.xsd"/>
<element name="binding.ws" type="sca:WebServiceBinding"
substitutionGroup="sca:binding"/>
<complexType name="WebServiceBinding">
<complexContent>
<extension base="sca:Binding">
<sequence>
<element ref="wsa:EndpointReference"
minOccurs="0" maxOccurs="unbounded"/>
<element ref="sca:extensions" minOccurs="0"
maxOccurs="1" />
</sequence>
<attribute name="wsdlElement" type="anyURI"
use="optional"/>
<attribute ref="wsdli:wsdlLocation" use="optional"/>
</extension>
</complexContent>
</complexType>
</schema>
Appendix B. SCA
Web Services Callback Protocol Policy Assertion XML Schema:
sca-binding-webservice-callback-1.1.xsd (Normative)
<?xml
version="1.0" encoding="UTF-8"?>
<!--
(c) Copyright OASIS 2005, 2010. All Rights Reserved.
OASIS trademark, IPR and other policies apply. -->
<schema
xmlns="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://docs.oasis-open.org/ns/opencsa/sca/200912"
elementFormDefault="qualified">
<element name="WSCallback">
<complexType>
<sequence>
<any namespace="##other" processContents="lax"
minOccurs="0"
maxOccurs="unbounded"/>
</sequence>
<anyAttribute namespace="##any"
processContents="lax"/>
</complexType>
</element>
</schema>
Appendix
C. Conformance Items
(Normative)
This section contains a list of conformance items for the
SCA Web Service Binding specification.
|
Conformance ID
|
Description
|
|
[BWS20001]
|
For an
SCA reference, the @uri attribute MUST be an absolute value.
|
|
[BWS20002]
|
The value
of the @wsdlElement attribute MUST identify an element in an existing WSDL
1.1 document.
|
|
[BWS20003]
|
If the
binding is for an SCA service, the wsdlElement attribute MUST NOT
specify the wsdl.service form of URI.
|
|
[BWS20004]
|
If the wsdl.service
form of wsdlElement is used on an SCA reference binding, the set of
available ports for that reference binding MUST be non-empty.
|
|
[BWS20005]
|
If the wsdl.service
form of wsdlElement is used on an SCA reference binding, the SCA
runtime MUST raise an error if there are no available ports that it supports.
|
|
[BWS20006]
|
When an
invocation is made using an SCA reference binding with the wsdl.service
form of wsdlElement, the SCA runtime MUST use exactly one port from
the set of available ports for the reference (with port selection on a
per-invocation basis permitted).
|
|
[BWS20007]
|
If the
binding is for an SCA service, the portType associated with the specified
WSDL port MUST be compatible with the SCA service interface as defined in
section 2.1, and the port MUST satisfy all the policy constraints of the
binding.
|
|
[BWS20008]
|
The SCA
runtime MUST expose an endpoint for the specified WSDL port, or raise an
error if it does not support the WSDL port.
|
|
[BWS20009]
|
If the
binding is for an SCA reference, the portType associated with the specified
WSDL port MUST be a compatible superset of the SCA reference interface as
defined in the SCA Assembly Model specification [SCA-Assembly], and the port MUST satisfy all the policy
constraints of the binding.
|
|
[BWS20010]
|
The SCA
runtime MUST use the specified WSDL port for invocations made using the SCA
reference binding, or raise an error if it does not support the WSDL port.
|
|
[BWS20011]
|
If the
binding is for an SCA service, the portType associated with the specified WSDL
binding MUST be compatible with the SCA service interface as defined in
section 2.1, and the WSDL binding MUST satisfy all the policy constraints of
the binding.
|
|
[BWS20012]
|
The SCA
runtime MUST expose an endpoint for the specified WSDL binding, or raise an
error if it does not support the WSDL binding.
|
|
[BWS20013]
|
If the
binding is for an SCA reference, the portType associated with the specified
WSDL binding MUST be a compatible superset of the SCA reference interface as
defined in the SCA Assembly Model specification [SCA-Assembly], and the WSDL binding MUST satisfy all the policy
constraints of the binding.
|
|
[BWS20014]
|
The SCA
runtime MUST use the specified WSDL binding for invocations made using the
SCA reference binding, or raise an error if it does not support the WSDL
binding.
|
|
[BWS20015]
|
When the wsdl.binding
form of wsdlElement is used , the endpoint address URI for an SCA reference
MUST be specified by either the @uri attribute on the binding or a
WS-Addressing wsa:EndpointReference element, except where the SCA
Assembly Model specification [SCA-Assembly] states that the @uri attribute can be omitted.
|
|
[BWS20017]
|
If
the @wsdli:wsdlLocation attribute is used the @wsdlElement
attribute MUST also be specified.
|
|
[BWS20018]
|
The
value of the @wsdli:wsdlLocation attribute MUST identify an existing WSDL 1.1
document.
|
|
[BWS20019]
|
A
binding.ws element MUST NOT contain more than one of any of the following:
the @uri attribute; the @wsdlElement attribute referring to a WSDL port or to
a WSDL service; the wsa:EndpointReference element.
|
|
[BWS20020]
|
For the callback
element of an SCA service, the binding MUST NOT specify an endpoint address
URI or a WS-Addressing wsa:EndpointReference.
|
|
[BWS20021]
|
The SCA
runtime MUST support all the attributes of the <binding.ws> element,
namely @name, @uri, @requires, @policySets, @wsdlElement, and
@wsdli:wsdlLocation.
|
|
[BWS20022]
|
The SCA
runtime SHOULD support the element <wsa:EndpointReference>.
|
|
[BWS20023]
|
If an SCA
runtime does not support the element <wsa:EndpointReference>, then it
MUST reject an SCA WS Binding XML document (as defined in Section 5.1) that
contains the element.
|
|
[BWS20024]
|
The
<binding.ws> element MUST conform to the XML schema defined in
sca-binding-webservice-1.1.xsd.
|
|
[BWS20025]
|
If there
is no target address for a reference binding, the SCA runtime MUST raise an
error.
|
|
[BWS20026]
|
For a
reference binding, the SCA runtime MUST use the target address.
|
|
[BWS20027]
|
When binding.ws
is used on a service or reference with an interface that is not defined by interface.wsdl,
the SCA runtime MUST derive a WSDL portType for the service or reference from
the interface using the WSDL-mapping rules defined for that SCA interface
type.
|
|
[BWS20028]
|
An SCA
runtime MUST raise an error if the interface on a service or reference
element with a binding.ws element does not map to a WSDL portType.
|
|
[BWS20032]
|
An SCA
runtime MUST support the WSDL extensions defined in the namespace associated
with the prefix "sca" (as defined in section 1.1).
|
|
[BWS20033]
|
The SCA
runtime MUST support the WSDL 1.1 binding extension for SOAP 1.1 over HTTP [WSDL11], as identified by the WSDL element wsoap11:binding
that has the @transport attribute with a value of
"http://schemas.xmlsoap.org/soap/http".
|
|
[BWS20035]
|
The
<bindingType> element associated with this binding MUST include the
SOAP.v1_1 intent in its @mayProvides or @alwaysProvides attributes.
|
|
[BWS20037]
|
The SCA
runtime MUST raise an error if a web service binding is configured with a
policy intent(s) that conflicts with the binding instance's configuration.
|
|
[BWS40001]
|
When the
SOAP intent is required, the SCA runtime MUST transmit and receive messages
using SOAP. One or more SOAP versions can be used.
|
|
[BWS40002]
|
When the
SOAP.v1_1 intent is required, the SCA runtime MUST transmit and receive
messages using only SOAP 1.1.
|
|
[BWS40003]
|
When the
SOAP.v1_2 intent is required, the SCA runtime MUST transmit and receive
messages using only SOAP 1.2.
|
|
[BWS40004]
|
For an
SCA service or reference element, the portType from the service's or
reference’s interface or derived from that interface MUST follow either the
rpc-literal pattern or the document-literal pattern.
|
|
[BWS40005]
|
In the
event that the transport details are not determined by use of the
@wsdlElement attribute, @uri attribute, wsa:EndpointReference element, policy
intents, policy sets or extensions to the binding.ws element, an SCA runtime
MUST enable the default transport binding rules.
|
|
[BWS40007]
|
When
using the default transport binding rules with the rpc-literal pattern, the
SCA runtime MUST use the structural URI associated with the binding as the
namespace of the child elements of the SOAP body element.
|
|
[BWS50002]
|
Every
request message from the WSCB Client that invokes the forward interface MUST
contain a Callback EPR.
|
|
[BWS50004]
|
If the
Callback EPR's [address] value is "http://www.w3.org/2005/08/addressing/anonymous" or "http://www.w3.org/2005/08/addressing/none" then the WSCB Service MUST generate the Invalid
Addressing Header fault as specified in Section 6.4.1 of [WS-Addr-SOAP].
|
|
[BWS50005]
|
When the
WSCB Service invokes the callback interface, it MUST use the Callback EPR
from a request message that invoked the forward interface.
|
|
[BWS50006]
|
Once the
Callback EPR is selected, the WSCB Service MUST follow the rules defined in
Section 3.3 of [WS-Addr] to invoke operations on the callback interface.
|
|
[BWS50007]
|
When the
WSCB Service invokes the callback interface, if the request message from
which the Callback EPR was obtained contained the wsa:MessageID SOAP header block, the WSCB Service MUST include a
wsa:RelatesTo SOAP header block in the callback message.
|
|
[BWS50008]
|
The wsa:RelatesTo SOAP header block MUST have the relationship type
value of "http://docs.oasis-open.org/opencsa/sca-bindings/ws/callback" and the related message id MUST be the wsa:MessageID of the message from which the Callback EPR was
obtained.
|
|
[BWS50009]
|
If the
request message from which the Callback EPR was obtained did not contain the wsa:MessageID SOAP header block, the WSCB Service MUST NOT
include a wsa:RelatesTo SOAP header block with a relationship type value
of "http://docs.oasis-open.org/opencsa/sca-bindings/ws/callback"
in the callback message.
|
|
[BWS50010]
|
The
WSCallback policy assertion indicates that the WSCB Client and the WSCB
Service MUST use SCA Web Services Callback Protocol to implement callbacks.
|
Appendix D. WSDL
Generation (Non-Normative)
Due to the number of factors that determine how a WSDL might
be generated, including compatibility with existing WSDL uses, precise details
cannot be specified. For example, implementation decisions can affect the way
WSDL might be generated. For reference, and consistency, this section suggests
non-normative choices for some of the various details involved in generating
WSDL. For brevity, the following definitions apply:
·
component name = the value of the @name attribute of the
component element containing the binding.ws element
·
service name = the value of the @name attribute of the service
element containing the binding.ws element
·
binding name = the value of @name attribute of the binding.ws
element, or the default if no @name attribute is present
·
SOAP version = either "SOAP11" or "SOAP12" as
appropriate
With those definitions in place, here are the suggested
choices:
·
wsdl:definitions/@name = <component name> + "." +
<service name>
·
wsdl:definitions/@targetNamespace = <structural URI for the
service>
·
import each WSDL 1.1 portType, rather than putting them inline
·
wsdl:binding/@name = <binding name> + <SOAP version>
+ "Binding"
·
wsdl:service/@name = <service name>
·
wsdl:port/@name = <binding name> + <SOAP version> +
"Port"
Appendix E.
SCA Web Services Callback Protocol Message Examples (Non-Normative)
The message examples in this section are for a configuration
that consists of a reference R that is wired to a Service S. S has a
bidirectional interface and the binding used in both directions, forward and
callback, is binding.ws configured for SOAP. The forward interface and the
callback interface both contain a single one-way operation.
The following message exchanges take place between R and S:
1.
R invokes the forward operation and sets the callback address to RC1. Let's call the message that invokes the
forward operation R1. S then calls the callback operation twice. Let’s call the
callback messages S1 and S2
2.
R invokes the forward operation again with the same callback address RC1. Let’s call the message that invokes the
forward operation R2. S then calls the callback operation once. Let’s call the
callback message S3.
3.
R invokes the forward operation yet another time, but this time uses a
difference callback address: RC2. Let's call
the message that invokes the forward operation R3. S then calls the callback
operation twice. Let’s call the callback messages S4 and S5.
The messages R1, R2, R3, S1, S2, S3, S4 and S4 are shown.
The namespace prefix 'soap' can be bound to either the SOAP 1.1 or SOAP 1.2
namespace. The 'wsa' prefix is bound to the WS-Addressing 1.0 namespace.
R1:
<soap:Envelope ...>
<soap:Header>
<wsa:From>
<wsa:Address>http://example.com/callback</wsa:Address>
<wsa:ReferenceProperties>
<myNS:SomeID>1</myNS:SomeID>
</wsa:ReferenceProperties>
</wsa:From>
<wsa:MessageID>urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6</wsa:messageID>
...
</soap:Header>
<soap:Body>
...
</soap:Body>
</soap:Envelope>
S1, S2:
<soap:Envelope ...>
<soap:Header>
<wsa:To>http://example.com/callback</wsa:To>
<myNS:SomeID>1</myNS:SomeID>
<wsa:RelatesTo RelationshipType="http://docs.oasis-open.org/opencsa/sca-bindings/ws/callback">urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6</wsa:RelatesTo>
...
</soap:Header>
<soap:Body>
...
</soap:Body>
</soap:Envelope>
R2:
<soap:Envelope ...>
<soap:Header>
<wsa:From>
<wsa:Address>http://example.com/callback</wsa:Address>
<wsa:ReferenceProperties>
<myNS:SomeID>1</myNS:SomeID>
</wsa:ReferenceProperties>
</wsa:From>
<wsa:MessageID>urn:uuid:f81d4fae-8dec-11d0-a765-00a0c91e6bf6</wsa:messageID>
...
</soap:Header>
<soap:Body>
...
</soap:Body>
</soap:Envelope>
S3:
<soap:Envelope ...>
<soap:Header>
<wsa:To>http://example.com/callback</wsa:To>
<myNS:SomeID>1</myNS:SomeID>
<wsa:RelatesTo RelationshipType="http://docs.oasis-open.org/opencsa/sca-bindings/ws/callback">
urn:uuid:f81d4fae-8dec-11d0-a765-00a0c91e6bf6
</wsa:RelatesTo>
...
</soap:Header>
<soap:Body>
...
</soap:Body>
</soap:Envelope>
R3:
<soap:Envelope ...>
<soap:Header>
<wsa:From>
<wsa:Address>http://example.com/callback-other</wsa:Address>
<wsa:ReferenceProperties>
<myNS:SomeID>2</myNS:SomeID>
</wsa:ReferenceProperties>
</wsa:From>
<wsa:MessageID>urn:uuid:f81d4fae-9dec-11d0-a765-00a0c91e6bf6</wsa:messageID>
...
</soap:Header>
<soap:Body>
...
</soap:Body>
</soap:Envelope>
S4, S5:
<soap:Envelope ...>
<soap:Header>
<wsa:To>http://example.com/callback-other</wsa:To>
<myNS:SomeID>2</myNS:SomeID>
<wsa:RelatesTo RelationshipType="http://docs.oasis-open.org/opencsa/sca-bindings/ws/callback">urn:uuid:f81d4fae-9dec-11d0-a765-00a0c91e6bf6</wsa:RelatesTo>
...
</soap:Header>
<soap:Body>
...
</soap:Body>
</soap:Envelope>
E.1 Message Examples Using WS-MakeConnection
In this case the reference R cannot host a listener and uses
WS-MakeConnection to poll for callback requests. The interaction between the
two consists of reference R sending a forward request R4. When using HTTP, the
HTTP response to R4 contains an empty entity body. This is followed by a
MakeConnection message from the reference to the service. This is a polling
message from the reference and establishes a connection. If the callback
request is ready when the connection is established, the service sends a
callback request S6 to the reference in the entity body of the HTTP response.
R4:
<soap:Envelope ...>
<soap:Header>
<wsa:From>
<wsa:Address>http://docs.oasis-open.org/ws-rx/wsmc/200702/anonymous?id=650e8400-f29b-11d4-a716-446655440010</wsa:Address>
</wsa:From>
<wsa:MessageID>urn:uuid:f81d4fae-10dec-11d0-a765-00a0c91e6bf6</wsa:messageID>
...
</soap:Header>
<soap:Body>
...
</soap:Body>
</soap:Envelope>
MakeConnection polling message (from R to S):
<soap:Envelope ...>
<soap:Header>
<wsa:Action>http://docs.oasis-open.org/ws-rx/wsmc/200702/MakeConnection</wsa:Action>
...
</soap:Header>
<soap:Body>
<wsmc:MakeConnection>
<wsmc:Address>http://docs.oasis-open.org/ws-rx/wsmc/200702/anonymous?id=650e8400-f29b-11d4-a716-446655440010</wsmc:Address>
</wsmc:MakeConnection>
</soap:Body>
</soap:Envelope>
S6:
<soap:Envelope ...>
<soap:Header>
<wsa:To>http://docs.oasis-open.org/ws-rx/wsmc/200702/anonymous?id=650e8400-f29b-11d4-a716-446655440010</wsa:To>
<wsa:RelatesTo RelationshipType="http://docs.oasis-open.org/opencsa/sca-bindings/ws/callback">urn:uuid:f81d4fae-10dec-11d0-a765-00a0c91e6bf6</wsa:RelatesTo>
...
</soap:Header>
<soap:Body>
...
</soap:Body>
</soap:Envelope>
The following individuals have participated in the creation
of this specification and are gratefully acknowledged:
Participants:
|
Participant Name
|
Affiliation
|
|
Bryan Aupperle
|
IBM
|
|
Ron Barack
|
SAP AG
|
|
Michael Beisiegel
|
IBM
|
|
Henning Blohm
|
SAP AG
|
|
David Booz
|
IBM
|
|
Martin Chapman
|
Oracle Corporation
|
|
Jean-Sebastien Delfino
|
IBM
|
|
Laurent Domenech
|
TIBCO Software Inc.
|
|
Jacques Durand
|
Fujitsu Limited
|
|
Mike Edwards
|
IBM
|
|
Billy Feng
|
Primeton Technologies, Inc.
|
|
Nimish Hathalia
|
TIBCO Software Inc.
|
|
Simon Holdsworth
|
IBM
|
|
Eric Johnson
|
TIBCO Software Inc.
|
|
Uday Joshi
|
Oracle Corporation
|
|
Khanderao Kand
|
Oracle Corporation
|
|
Anish Karmarkar
|
Oracle Corporation
|
|
Nickolaos Kavantzas
|
Oracle Corporation
|
|
Mark Little
|
Red Hat
|
|
Ashok Malhotra
|
Oracle Corporation
|
|
Jim Marino
|
Individual
|
|
Jeff Mischkinsky
|
Oracle Corporation
|
|
Dale Moberg
|
Axway Software
|
|
Simon Nash
|
Individual
|
|
Sanjay Patil
|
SAP AG
|
|
Plamen Pavlov
|
SAP AG
|
|
Peter Peshev
|
SAP AG
|
|
Piotr Przybylski
|
IBM
|
|
Luciano Resende
|
IBM
|
|
Tom Rutt
|
Fujitsu Limited
|
|
Vladimir Savchenko
|
SAP AG
|
|
Scott Vorthmann
|
TIBCO Software Inc.
|
|
Tim Watson
|
Oracle Corporation
|
|
Owen Williams
|
Avaya, Inc.
|
|
Prasad Yendluri
|
Software AG, Inc.
|
Appendix G.
Revision History (Non-Normative)
|
Revision
|
Date
|
Editor
|
Changes Made
|
|
1
|
2007-09-25
|
Anish Karmarkar
|
Applied the OASIS template + related changes to the
Submission
|
|
2
|
2008-04-02
|
Anish Karmarkar
|
* Partially applied the resolution of issue 14 in the
conformance section.
* Applied resolution to issue 9.
* Applied resolution to issue 15.
* Applied resolution to issue 16.
* Applied resolution to issue 10.
* Applied resolution to issue 8.
* Applied resolution to issue 3.
|
|
3
|
2008-06-12
|
Simon Holdsworth
|
* Completed application of resolution to issue 10
* Applied most of the editorial changes from Eric
Johnson’s review
|
|
4
|
2008-08-13
|
Anish Karmarkar
|
* Applied rest of Eric Johnson's ed review comments.
* Applied resolution of issue 13.
* Reapplied resolution of issue 15 (it was not applied
correctly before)
* Applied resolution of issue 19.
* Applied resolution of issue 30.
* Applied resolution of issue 32.
* Applied resolution of issue 36.
* Applied resolution of issue 38.
|
|
cd01-rev1
|
2008-10-16
|
Simon Holdsworth
|
Applied resolution of issue 41.
|
|
cd01-rev2
|
2008-10-20
|
Anish Karmarkar
|
Added rfc2119 statements.
|
|
cd01-rev3
|
2008-11-19
|
Anish Karmarkar
|
Incorporated feedback from Bryan, Eric & Dave
|
|
cd01-rev3
|
2008-12-02
|
Anish Karmarkar
|
Removed 'required' word associated with description of
pseudo-schema + changed section 2.6 (wsdl extensibility) per the TC decision.
Both of these were associated with issue 51 (2119 stmts)
|
|
cd01-rev5
|
2009-02-06
|
Simon Holdsworth
|
Applied resolution of issue 11
Applied resolution of issue 49
Applied action item 20080904-1
|
|
cd02
|
2009-02-16
|
Simon Holdsworth
|
Renamed, applied editorial issues
|
|
cd02-rev1
|
2009-06-02
|
Anish Karmarkar
|
* Applied resolution of issue 61 by using the document at
http://www.oasis-open.org/apps/org/workgroup/sca-bindings/download.php/32160/sca-binding-ws-1.1-spec-cd02-issue61-rev3.doc
as the base document.
* Updated NS URI (Applied action item 20090311-2).
* Updated Copyright statement in various places.
* Updated schema per http://lists.oasis-open.org/archives/sca-bindings/200903/msg00057.html
(Applied action item 20090312-1).
* Applied resolution of issue 23, 25, 43, 54, 55, 64.
* Replaced 3 occurrences of ‘required’ with ‘specified’.
* Recreated all bookmarks, cross-references, and
conformance item table.
|
|
cd02-rev2
|
2009-06-09
|
Anish Karmarkar
|
Ed. fixes. Changed the way the crossrefs/bookmarks for
RFC2119 keywords work. Fixed a few references.
|
|
cd02-rev3
|
2009-06-11
|
Anish Karmarkar
|
* Removed ‘:’ from 40005, reformatted 40006/40007.
* minor ed changes pointed out by SimonN.
* minor formatting changes.
* modified BWS20018 to remove the first sentence.
|
|
cd02-rev4
|
2009-06-17
|
Anish Karmarkar
|
* Not fixed in this rev, but issue 57 resolution was
applied in previous rev.
* Added list of participants in the Ack section.
* Ed changes pointed out by Eric.
|
|
cd02-rev5
|
2009-06-22
|
Anish Karmarkar
|
* Port of the fix made in JMS/JCA binding for issues
74/75. Specifically SCA WS Binding XML document requirements were made less
vague (by referring to attributes/elements)
|
|
cd02-rev6
|
2009-06-24
|
Anish Karmarkar
|
* Applied resolution of issue 76, 79, 82.
* Some very minor ed changes.
* Reverted the document naming scheme to the old scheme.
|
|
cd02-rev7
|
2009-07-01
|
Simon Holdsworth
|
* Applied resolution of issue 2
* Fixed application of resolution of issue 76
|
|
cd03
|
2009-07-01
|
Simon Holdsworth
|
Renamed for cd03
|
|
cd03-rev1
|
2010-02-07
|
Bryan
|
Added table #, snippet #, etc.
|
|
cd03-rev2
|
2010-03-10
|
Anish Karmarkar
|
* Updated 'Notices' section for trademarks
* Applied resolution of issue 99 points 9, 10, 16
* Added references per http://lists.oasis-open.org/archives/sca-bindings/200912/msg00013.html
* Applied resolution of issue 84, 86, 91, 92, 116, 117,
118, 119
* Updated NS URI from 200903 to 200912
|
|
cd03-rev3
|
2010-03-31
|
Anish Karmarkar
|
* Updated schema appendix title to include "1.1"
* Applied resolution of issue 124
* Ed changes associated with issue 124 resolution
|
|
cd03-rev4
|
2010-04-22
|
Anish Karmarkar
|
* Fixed ed issues pointed out at
http://lists.oasis-open.org/archives/sca-bindings/201004/msg00004.html
|
|
cd03-rev5
|
2010-05-06
|
Anish Karmarkar
|
* Updated reference to assembly
* Minor ed tweaks in the namespace prefix table
* Applied resolution of issue 127
|
|
cd04
|
2010-05-14
|
Simon Holdsworth
|
Fix up for publication
|
|
wd041
|
2011-06-23
|
Mike Edwards
|
Issue 145 - Section 1.3, new section 1,5
Issue 160 - Section 5.3.3, section 6.1
Issue 161 - Section 5.3.5
Issue 163 - Section 2.4
Issue 164 - Section 4.2.2
Issue 165 - Section 5.3.5
Issue 166 - Section 6.4
Issue 168 - Sections 2.7, 2.9
|
|
wd042
|
2011-07-04
|
Simon Holdsworth
|
Editorial formatting changes
|
|
wd043
|
2011-07-22
|
Simon Holdsworth
|
Updated references to SCA Assembly, Policy and JCAA
specifications
|
