Network Deployment (Distributed operating systems), v8.0 > Applications > Web services > Web Services Addressing support
IBM proprietary Web Services Addressing SPIs
The IBM proprietary Web Services Addressing (WS-Addressing) system programming interfaces (SPIs) extend the IBM proprietary WS-Addressing API to enable you to create and reason about the contents of endpoint references and other WS-Addressing artifacts, and to set or retrieve WS-Addressing message-addressing properties (MAPs) on or from web service messages.
We cannot use the standard JAX-WS API classes with these proprietary SPIs. However, you can convert endpoint references created by using the standard JAX-WS API classes to instances of the proprietary com.ibm.websphere.wsaddressing.EndpointReference class, using the com.ibm.websphere.wsaddressing.jaxws21.EndpointReferenceConverter class. We can then use these converted endpoint references with the proprietary SPIs.
The programming interfaces in this topic are described in more detail in the IBM WS-Addressing SPI documentation.
Create, refining, and reasoning about the contents of endpoint references
The proprietary SPIs for creating, refining, and reasoning about the contents of endpoint references are contained in the com.ibm.wsspi.wsaddressing package and are summarized in the following illustration (the first two interfaces are proprietary API interfaces that are extended by the SPIs):
The SPI extends the proprietary WS-Addressing com.ibm.websphere.wsaddressing.EndpointReference API to provide a number of additional methods through the com.ibm.wsspi.wsaddressing.EndpointReference interface. We can cast instances of com.ibm.websphere.wsaddressing.EndpointReference to com.ibm.wsspi.wsaddressing.EndpointReference to access these additional functions.
Similarly, the SPI com.ibm.wsspi.wsaddressing.EndpointReferenceManager extends the set of functions that are provided in the com.ibm.websphere.wsaddressing.EndpointReferenceManager API.
We can complete the following actions by using the additional methods that are provided by the EndpointReference and EndpointReferenceManager SPIs:
- Create endpoint references
- Create EndpointReference objects by specifying the URI of the endpoint that the EndpointReference object is to represent, by using the createEndpointReference(URI) operation, or the EndpointReferenceManager.createEndpointReference(AttributedURI) operation. These methods differ from the createEndpointReference method provided at the API level, in that they do not automatically generate the URI for the EndpointReference instance. You might use these methods when you know that the URI of the endpoint is stable, for example in a test environment with no deployment restrictions.
- Map between XML and Java representations of an endpoint reference
- We can serialize instances of the EndpointReference interface to their corresponding SOAP element instances by using the EndpointReference.getSOAPElement operation. Conversely, you can deserialize SOAP elements of type EndpointReferenceType into their corresponding EndpointReference Java representation, by using the EndpointReference.createEndpointReference(SOAPElement) operation. You might find these serialization and deserialization interfaces useful if you are creating custom binders for types that contain EndpointReference instances.
- Use more complex reference parameter types
- The proprietary interfaces that are provided at the API level are restricted to reference parameters of type xsd:string to allow for a simpler programming model. The SPIs extend this support to allow reference parameters of type
<xsd:any>. The EndpointReference interface provides mechanisms for getting and setting reference parameters as SOAP elements. Additionally, the EndpointReferenceManager class provides the getSOAPElementReferenceParameterFromMessageContext operation, which enables receiving endpoints to acquire reference parameters that are not of type String from the incoming message.
When invoking a service with an EndpointReference object that contains a reference parameter, create the reference parameter by using a complete QName object, with all parts present: namespace, localpart, and prefix. If the QName object is not complete, service invocations fail.
- Set and reason about endpoint reference contents
- The EndpointReference interface provides operations for you to set and reason about the contents of an EndpointReference instance, such as its WS-Addressing address and metadata properties. Additional interfaces are provided to represent the artifacts making up an endpoint reference: Metadata, AttributedURI, and ServiceName. You create instances of these interfaces by using operations that are provided by the proprietary WSAddressingFactory class.
- Acquire and change the supported namespace
- The WS-Addressing support in this product supports multiple namespaces. The setNamespace and getNamespace operations that are provided on the proprietary EndpointReference interface enable you to change and acquire the namespace that is associated with a particular EndpointReference object. Serialization to SOAP elements is in accordance with the namespace of the EndpointReference object. By default, the namespace of the destination endpoint reference (the endpoint reference set as the com.ibm.websphere.wsaddressing.WSAConstants.WSADDRESSING_DESTINATION_EPR property on the JAX-WS BindingProvider object request context, or the JAX-RPC Stub or Call object), defines the namespace of the message-addressing properties of the message.
Set and Retrieving WS-Addressing message-addressing properties
The IBM proprietary WS-Addressing SPI provides a number of constants that identify JAX-WS or JAX-RPC properties that you can use to set WS-Addressing MAPs on outbound messages, and message context properties that you can use to retrieve MAPs on inbound messages. These constants are shown in the following diagram in the com.wsspi.wsaddresssing.WSAConstants class. The diagram also shows the interfaces that are required for generating instances of the appropriate property value types AttributedURI and Relationship. The first WSAConstants interface is a proprietary API interface.
Set WS-Addressing message-addressing properties on outbound messages
We can add WS-Addressing message information headers to outgoing messages by setting the appropriate properties on the JAX-WS BindingProvider object request context, or the JAX-RPC Stub or Call object, prior to invoking a message with the BindingProvider, Stub, or Call object. The following table summarizes the relevant properties and their types.
| Property name (of type String) | Java type of property value | Abstract WS-Addressing MAP name or names, using the notational convention of the W3C XML Information Set | Default value |
|---|---|---|---|
| WSADDRESSING_DESTINATION_EPR | com.ibm.websphere.wsaddressing.EndpointReference | [destination] URI [reference parameters]* (any) | Not set
Note that this property comes from the API. |
| WSADDRESSING_FROM_EPR | com.ibm.websphere.wsaddressing.EndpointReference | [source endpoint] | Not set |
| WSADDRESSING_REPLYTO_EPR | com.ibm.websphere.wsaddressing.EndpointReference | [reply endpoint] | Either 'none', if the message is a one-way message with no reply, or not set. For two-way asynchronous messages in JAX-WS applications, this property is generated automatically. If, in this situation, you attempt to set this property, a javax.xml.ws.WebServiceException exception is thrown. For two-way synchronous messages you can set this property only if the endpoint reference address is the anonymous URI. If the address is not the anonymous URI, a javax.xml.ws.WebServiceException exception is thrown. |
| WSADDRESSING_FAULTTO_EPR | com.ibm.websphere.wsaddressing.EndpointReference | [fault endpoint] | Not set
If you attempt to set this property for two-way asynchronous messages in JAX-WS applications, a javax.xml.ws.WebServiceException exception is thrown. For two-way synchronous messages you can set this property only if the endpoint reference address is the anonymous URI. If the address is not the anonymous URI, a javax.xml.ws.WebServiceException exception is thrown. |
| WSADDRESSING_RELATIONSHIP_SET | java.util.Set containing instances of com.ibm.wsspi.wsaddressing.Relationship | [relationship] | Not set |
| WSADDRESSING_MESSAGE_ID | com.ibm.wsspi.wsaddressing.AttributedURI | [message id] | Generated and set to a unique value |
| WSADDRESSING_ACTION | com.ibm.wsspi.wsaddressing.AttributedURI | [action] | Generated and set, according to the WS-Addressing specification |
| WSADDRESSING_OUTBOUND_NAMESPACE | String | none | The WS-Addressing namespace of the WSADDRESSING_DESTINATION_EPR property, if specified, otherwise the default namespace |
Retrive WS-Addressing message-addressing properties from inbound messages
WS-Addressing message information headers that correspond to the last inbound message are available from the inbound properties that are defined in the WSAConstants class. The following table summarizes the available inbound properties. You acquire reference parameters from the message context by using the proprietary EndpointReferenceManager.getReferenceParameter interface.
| Message context property name (of type String) | Java type of property value | Abstract WS-Addressing MAP name, using the notational convention of the W3C XML Information Set |
|---|---|---|
| WSADDRESSING_INBOUND_TO | com.ibm.wsspi.wsaddressing.AttributedURI | [destination] |
| No specific property. Use the EndpointReferenceManager.getReferenceParameter(QName name) method to obtain the associated MAP. | Any type | [reference parameters]* |
| WSADDRESSING_INBOUND_FROM_EPR | com.ibm.websphere.wsaddressing.EndpointReference | [source endpoint] |
| WSADDRESSING_INBOUND_REPLYTO_EPR | com.ibm.websphere.wsaddressing.EndpointReference | [reply endpoint] |
| WSADDRESSING_INBOUND_FAULTTO_EPR | com.ibm.websphere.wsaddressing.EndpointReference | [fault endpoint] |
| WSADDRESSING_INBOUND_RELATIONSHIP | java.util.Set containing instances of com.ibm.wsspi.wsaddressing.Relationship | [relationship] |
| WSADDRESSING_INBOUND_MESSAGE_ID | com.ibm.wsspi.wsaddressing.AttributedURI | [message id] |
| WSADDRESSING_INBOUND_ACTION | com.ibm.wsspi.wsaddressing.AttributedURI | [action] |
| WSADDRESSING_INBOUND_NAMESPACE | String | The WS-Addressing namespace of the incoming message |
Web Services Addressing support
Web Services Resource Framework support
Create stateful web services by using the Web Services Resource Framework
Use the IBM proprietary Web Services Addressing SPIs: Performing more advanced Web Services Addressing tasks
Generated API documentation - Application programming interfaces
W3C XML Information Set: http://www.w3.org/TR/xml-infoset/
Concept topic