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9.3. Enabling MTOM

By default the Apache CXF runtime does not enable MTOM support. It sends all binary data as either part of the normal SOAP message or as an unoptimized attachment. You can activate MTOM support either programmatically or through the use of configuration.

9.3.1. Using JAX-WS APIs
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Overview
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Both service providers and consumers must have the MTOM optimizations enabled. The JAX-WS APIs offer different mechanisms for each type of endpoint.

Service provider
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If you published your service provider using the JAX-WS APIs you enable the runtime's MTOM support as follows:
  1. Access the Endpoint object for your published service.
    The easiest way to access the Endpoint object is when you publish the endpoint. For more information see Chapter 31, Publishing a Service.
  2. Get the SOAP binding from the Endpoint using its getBinding() method, as shown in Example 9.4, “Getting the SOAP Binding from an Endpoint”.

    Example 9.4. Getting the SOAP Binding from an Endpoint

    // Endpoint ep is declared previously
SOAPBinding binding = (SOAPBinding)ep.getBinding();
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    You must cast the returned binding object to a SOAPBinding object to access the MTOM property.
  3. Set the binding's MTOM enabled property to true using the binding's setMTOMEnabled() method, as shown in Example 9.5, “Setting a Service Provider's MTOM Enabled Property”.

    Example 9.5. Setting a Service Provider's MTOM Enabled Property

    binding.setMTOMEnabled(true);
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Consumer
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To MTOM enable a JAX-WS consumer you must do the following:
  1. Cast the consumer's proxy to a BindingProvider object.
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  2. Get the SOAP binding from the BindingProvider using its getBinding() method, as shown in Example 9.6, “Getting a SOAP Binding from a BindingProvider”.

    Example 9.6. Getting a SOAP Binding from a BindingProvider

    // BindingProvider bp declared previously
SOAPBinding binding = (SOAPBinding)bp.getBinding();
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  3. Set the bindings MTOM enabled property to true using the binding's setMTOMEnabled() method, as shown in Example 9.7, “Setting a Consumer's MTOM Enabled Property”.

    Example 9.7. Setting a Consumer's MTOM Enabled Property

    binding.setMTOMEnabled(true);
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9.3.2. Using configuration
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Overview
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If you publish your service using XML, such as when deploying to a container, you can enable your endpoint's MTOM support in the endpoint's configuration file. For more information on configuring endpoint's see Part IV, “Configuring Web Service Endpoints”.

Procedure
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The MTOM property is set inside the jaxws:endpoint element for your endpoint. To enable MTOM do the following:
  1. Add a jaxws:property child element to the endpoint's jaxws:endpoint element.
  2. Add a entry child element to the jaxws:property element.
  3. Set the entry element's key attribute to mtom-enabled.
  4. Set the entry element's value attribute to true.

Example
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Example 9.8, “Configuration for Enabling MTOM” shows an endpoint that is MTOM enabled.

Example 9.8. Configuration for Enabling MTOM

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:jaxws="http://cxf.apache.org/jaxws"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
                           http://cxf.apache.org/jaxws http://cxf.apache.org/schema/jaxws.xsd">

  <jaxws:endpoint id="xRayStorage" 
                  implementor="demo.spring.xRayStorImpl" 
                  address="http://localhost/xRayStorage">
    <jaxws:properties>
      <entry key="mtom-enabled" value="true"/>
    </jaxws:properties>
  </jaxws:endpoint>
</beans>
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