Using the Web Services Addressing (WS-Addressing) support in WebSphere Application Server, you can create endpoint references that can be distributed across firewalls and intermediary nodes.
To create endpoint references using WS-Addressing support, you use the com.ibm.websphere.wsaddressing.EndpointReferenceManager class of the WS-Addressing API to automatically generate endpoint references that represent endpoints on the node on which the references are generated. These endpoint references contain the appropriate address information, based on the URL configured for the endpoint and any valid proxy configuration for the server on which the endpoint resides. Messages targeted at the endpoint reference from the client are routed to the endpoint through the appropriate intermediary node or nodes, as described in the following topology scenarios.
The HTTP server with a Proxy Server for IBM WebSphere Application Server topology is useful when the HTTP server itself has no integrated capability for affinity-based routing to WS-Addressing endpoints.
For endpoint references that refer to services that do not access stateful information that is localized to a specific server, all the following topology scenarios are suitable.
Use this topology for non-clustered configurations.
Use this topology when endpoint references refer to services that are deployed in a workload-managed cluster, optionally access stateful information that is localized to a specific server, and optionally, can be failed over in a highly-available configuration.
If the proxy that is addressed by the endpoint reference is a Proxy Server for IBM WebSphere Application Server, at Version 6.1 or later, that exists in the same administrative cell as the endpoint, messages targeted at a workload-managed endpoint reference are workload-managed, based on the cluster.
Use this topology when endpoint references refer to services that are deployed in a workload-managed cluster, and that do not access any stateful information that is localized to a specific server.
Use this topology when endpoint references refer to services that are deployed in a workload-managed cluster, optionally access stateful information that is localized to a specific server, and optionally, can be failed over in a highly-available configuration. The topology is similar to the Proxy Server for IBM WebSphere Application Server topology, but supports the use of any HTTP server as the external reverse proxy.
In this topology, the WS-Addressing API automatically generates the appropriate endpoint reference address based on the URL prefix of the HTTP server that is configured for the target Web service module. You must provide HTTP endpoint URL information, that is, configure the HTTP URL prefix for each deployment of each application.
If the proxy that is addressed by the endpoint reference is Proxy Server for IBM WebSphere Application Server, at Version 6.1 or later, and exists in the same administrative cell as the endpoint, messages targeted at a workload-managed endpoint reference are workload-managed, based on the cluster.