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GenericHandler (Java EE 5 SDK) - Java Platform, Enterprise Edition v5.0 API Specifications

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javax.xml.rpc.handler
Class GenericHandler

java.lang.Object
  extended by javax.xml.rpc.handler.GenericHandler
All Implemented Interfaces:
Handler
public abstract class GenericHandler
extends Object
implements Handler

The javax.xml.rpc.handler.GenericHandler class implements the Handler interface. SOAP Message Handler developers should typically subclass GenericHandler class unless the Handler class needs another class as a superclass.

The GenericHandler class is a convenience abstract class that makes writing Handlers easy. This class provides default implementations of the lifecycle methods init and destroy and also different handle methods. A Handler developer should only override methods that it needs to specialize as part of the derived Handler implementation class.

Version:
1.0
Author:
Rahul Sharma

Constructor Summary
protected GenericHandler()
          Default constructor
 
Method Summary
 void destroy()
          The destroy method indicates the end of lifecycle for a Handler instance.
abstract  QName[] getHeaders()
          Gets the header blocks processed by this Handler instance.
 boolean handleFault(MessageContext context)
          The handleFault method processes the SOAP faults based on the SOAP message processing model.
 boolean handleRequest(MessageContext context)
          The handleRequest method processes the request SOAP message.
 boolean handleResponse(MessageContext context)
          The handleResponse method processes the response message.
 void init(HandlerInfo config)
          The init method to enable the Handler instance to initialize itself.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

GenericHandler

protected GenericHandler()
Default constructor

Method Detail

handleRequest

public boolean handleRequest(MessageContext context)
The handleRequest method processes the request SOAP message. The default implementation of this method returns true. This indicates that the handler chain should continue processing of the request SOAP message. This method should be overridden if the derived Handler class needs to specialize implementation of this method.

Specified by:
handleRequest in interface Handler
Parameters:
context - MessageContext parameter provides access to the request message.
Returns:
boolean Indicates the processing mode
  • Return true to indicate continued processing of the request handler chain. The HandlerChain takes the responsibility of invoking the next entity. The next entity may be the next handler in the HandlerChain or if this handler is the last handler in the chain, the next entity is the service endpoint object.
  • Return false to indicate blocking of the request handler chain. In this case, further processing of the request handler chain is blocked and the target service endpoint is not dispatched. The JAX-RPC runtime system takes the responsibility of invoking the response handler chain next with the SOAPMessageContext. The Handler implementation class has the the responsibility of setting the appropriate response SOAP message in either handleRequest and/or handleResponse method. In the default processing model, the response handler chain starts processing from the same Handler instance (that returned false) and goes backward in the execution sequence.
See Also:
Handler.handleRequest(javax.xml.rpc.handler.MessageContext)

handleResponse

public boolean handleResponse(MessageContext context)
The handleResponse method processes the response message. The default implementation of this method returns true. This indicates that the handler chain should continue processing of the response SOAP message. This method should be overridden if the derived Handler class needs to specialize implementation of this method.

Specified by:
handleResponse in interface Handler
Parameters:
context - MessageContext parameter provides access to the response SOAP message
Returns:
boolean Indicates the processing mode
  • Return true to indicate continued processing ofthe response handler chain. The HandlerChain invokes the handleResponse method on the next Handler in the handler chain.
  • Return false to indicate blocking of the response handler chain. In this case, no other response handlers in the handler chain are invoked.
See Also:
Handler.handleResponse(javax.xml.rpc.handler.MessageContext)

handleFault

public boolean handleFault(MessageContext context)
The handleFault method processes the SOAP faults based on the SOAP message processing model. The default implementation of this method returns true. This indicates that the handler chain should continue processing of the SOAP fault. This method should be overridden if the derived Handler class needs to specialize implementation of this method.

Specified by:
handleFault in interface Handler
Parameters:
context - MessageContext parameter provides access to the SOAP message
Returns:
boolean Indicates the processing mode
  • Return true to indicate continued processing of SOAP Fault. The HandlerChain invokes the handleFault method on the next Handler in the handler chain.
  • Return false to indicate end of the SOAP fault processing. In this case, no other handlers in the handler chain are invoked.
See Also:
Handler.handleFault(javax.xml.rpc.handler.MessageContext)

init

public void init(HandlerInfo config)
The init method to enable the Handler instance to initialize itself. This method should be overridden if the derived Handler class needs to specialize implementation of this method.

Specified by:
init in interface Handler
See Also:
Handler.init(javax.xml.rpc.handler.HandlerInfo)

destroy

public void destroy()
The destroy method indicates the end of lifecycle for a Handler instance. This method should be overridden if the derived Handler class needs to specialize implementation of this method.

Specified by:
destroy in interface Handler
See Also:
Handler.destroy()

getHeaders

public abstract QName[] getHeaders()
Gets the header blocks processed by this Handler instance.

Specified by:
getHeaders in interface Handler
Returns:
Array of QNames of header blocks processed by this handler instance. QName is the qualified name of the outermost element of the Header block.
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