Fuse ESB - Configuring Web Service Endpoints - Using the jaxws:server Element

Overview

The jaxws:server element is an element for configuring JAX-WS service providers. It injects the configuration information into the org.apache.cxf.jaxws.support.JaxWsServerFactoryBean. This is a Fuse Services Framework specific object. If you are using a pure Spring approach to building your services, you will not be forced to use Fuse Services Framework specific APIs to interact with the service.

The attributes and children of the jaxws:server element specify all of the information needed to instantiate a service provider. The attributes specify the information that is required to instantiate an endpoint. The children are used to configure interceptors and other advanced features.

Identifying the endpoint being configured

In order for the runtime to apply the configuration to the proper service provider, it must be able to identify it. The basic means for identifying a service provider is to specify the class that implements the endpoint. This is done using the jaxws:server element's serviceBean attribute.

For instances where different endpoint's share a common implementation, it is possible to provide different configuration for each endpoint. There are two approaches for distinguishing a specific endpoint in configuration:

a combination of the serviceName attribute and the endpointName attribute
The serviceName attribute specifies the wsdl:service element defining the service's endpoint. The endpointName attribute specifies the specific wsdl:port element defining the service's endpoint. Both attributes are specified as QNames using the format ns:name. ns is the namespace of the element and name is the value of the element's name attribute.
Tip
If the wsdl:service element only has one wsdl:port element, the endpointName attribute can be omitted.
the name attribute
The name attribute specifies the QName of the specific wsdl:port element defining the service's endpoint. The QName is provided in the format {ns}localPart. ns is the namespace of the wsdl:port element and localPart is the value of the wsdl:port element's name attribute.

	Tip
If the `wsdl:service` element only has one `wsdl:port` element, the `endpointName` attribute can be omitted.

Attributes

The attributes of the jaxws:server element configure the basic properties of the endpoint. These properties include the address of the endpoint, the class that implements the endpoint, and the bus that hosts the endpoint.

Table 1.2 describes the attribute of the jaxws:server element.

Table 1.2. Attributes for Configuring a JAX-WS Service Provider Using the jaxws:server Element

Attribute	Description
`id`	Specifies a unique identifier that other configuration elements can use to refer to the endpoint.
`serviceBean`	Specifies the class implementing the service. You can specify the implementation class using either the class name or an ID reference to a Spring bean configuring the implementation class. This class must be on the classpath.
`serviceClass`	Specifies the class implementing the service. This attribute is useful when the value provided to the `implementor` attribute is a reference to a bean that is wrapped using Spring AOP.
`address`	Specifies the address of an HTTP endpoint. This value will override the value specified in the services contract.
`wsdlLocation`	Specifies the location of the endpoint's WSDL contract. The WSDL contract's location is relative to the folder from which the service is deployed.
`endpointName`	Specifies the value of the service's `wsdl:port` element's `name` attribute. It is specified as a QName using the format `ns:name`, where `ns` is the namespace of the `wsdl:port` element.
`serviceName`	Specifies the value of the service's `wsdl:service` element's `name` attribute. It is specified as a QName using the format `ns:name`, where `ns` is the namespace of the `wsdl:service` element.
`start`	Specifies if the service should be automatically published. If this is set to `false`, the developer must explicitly publish the endpoint.
`bus`	Specifies the ID of the Spring bean configuring the bus used to manage the service endpoint. This is useful when configuring several endpoints to use a common set of features.
`bindingId`	Specifies the ID of the message binding the service uses. A list of valid binding IDs is provided in Appendix A.
`name`	Specifies the stringified QName of the service's `wsdl:port` element. It is specified as a QName using the format `{ns}localPart`, where `ns` is the namespace of the `wsdl:port` element and `localPart` is the value of the `wsdl:port` element's `name` attribute.
`abstract`	Specifies if the bean is an abstract bean. Abstract beans act as parents for concrete bean definitions and are not instantiated. The default is `false`. Setting this to `true` instructs the bean factory not to instantiate the bean.
`depends-on`	Specifies a list of beans that the endpoint depends on being instantiated before the endpoint can be instantiated.
`createdFromAPI`	Specifies that the user created that bean using Fuse Services Framework APIs, such as `Endpoint.publish()` or `Service.getPort()`. The default is `false`. Setting this to `true` does the following: Changes the internal name of the bean by appending `.jaxws-endpoint` to its id Makes the bean abstract

In addition to the attributes listed in Table 1.2, you might need to use multiple xmlns:shortName attributes to declare the namespaces used by the endpointName and serviceName attributes.

Example

Example 1.3 shows the configuration for a JAX-WS endpoint that specifies the address where the endpoint is published.

Example 1.3. Simple JAX-WS Server Configuration

<beans ...
  xmlns:jaxws="http://cxf.apache.org/jaxws"
  ...
  schemaLocation="...
    http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd
    ...">
  <jaxws:server id="exampleServer"
                  serviceBean="org.apache.cxf.example.DemoImpl"
                  address="http://localhost:8080/demo" />
</beans>