org.apache.axis2.engine

Class Phase

java.lang.Object

org.apache.axis2.engine.Phase

All Implemented Interfaces:

Handler

Direct Known Subclasses:

DispatchPhase

public class Phase
extends java.lang.Object
implements Handler

A Phase is an ordered collection of Handlers.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.axis2.engine.Handler

Handler.InvocationResponse

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ALL_PHASES

Constructor Summary

Constructors

Constructor and Description
Phase() Default constructor
Phase(java.lang.String phaseName) Create a named Phase

Method Summary

Modifier and Type	Method and Description
void	addHandler(Handler handler) Add a handler to the Phase.
void	addHandler(HandlerDescription handlerDesc) Add a HandlerDescription to the Phase
void	addHandler(Handler handler, int index) Add a Handler at a particular index within the Phase.
void	checkPostConditions(MessageContext msgContext) Confirm that all post-conditions of this Phase are met.
void	checkPreconditions(MessageContext msgContext) Check the preconditions for a Phase.
void	cleanup()
void	flowComplete(MessageContext msgContext) This method will be called on each registered handler that had its invoke(...) method called during the processing of the message, once the message processing has completed.
int	getHandlerCount()
HandlerDescription	getHandlerDesc() Gets the HandlerDescription of a handler.
java.util.List<Handler>	getHandlers() Gets all the handlers in the phase.
java.lang.String	getName() Return the name of this Handler
Parameter	getParameter(java.lang.String name) Get a Parameter from this Handler
java.lang.String	getPhaseName()
void	init(HandlerDescription handlerdesc) Initialize a Handler.
Handler.InvocationResponse	invoke(MessageContext msgctx) Invoke all the handlers in this Phase
void	removeHandler(HandlerDescription handlerDesc) Remove a given Handler from a phase using a HandlerDescription
void	setName(java.lang.String phaseName)
void	setPhaseFirst(Handler handler) Add a Handler to the Phase in the very first position, and ensure no other Handler will come before it.
void	setPhaseLast(Handler handler) Add a Handler to the Phase in the very last position, and ensure no other Handler will come after it.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

ALL_PHASES

public static final java.lang.String ALL_PHASES

See Also:

Constant Field Values

Constructor Detail

Phase

public Phase()

Default constructor

Phase

public Phase(java.lang.String phaseName)

Create a named Phase

Parameters:

phaseName - the name for this Phase

Method Detail

addHandler

public void addHandler(Handler handler)

Add a handler to the Phase.

Parameters:

handler - the Handler to add

addHandler

public void addHandler(HandlerDescription handlerDesc)
                throws PhaseException

Add a HandlerDescription to the Phase

Parameters:

handlerDesc - the HandlerDescription to add

Throws:

PhaseException - if there is a problem

addHandler

public void addHandler(Handler handler,
                       int index)

Add a Handler at a particular index within the Phase. If we have a Phase with (H1, H2), calling addHandler(H3, 1) will result in (H1, H3, H2)

Parameters:

handler - the Handler to add

index - the position in the Phase at which to place the Handler

checkPostConditions

public void checkPostConditions(MessageContext msgContext)
                         throws AxisFault

Confirm that all post-conditions of this Phase are met. After all Handlers in a Phase are invoke()d, this method will be called. Subclasses should override it in order to confirm that the purpose of the given Phase has been acheived.

Parameters:

msgContext - the active MessageContext

Throws:

AxisFault - if a post-condition has not been met, or other problems occur

checkPreconditions

public void checkPreconditions(MessageContext msgContext)
                        throws AxisFault

Check the preconditions for a Phase. This method will be called when the Phase is invoked, BEFORE any Handlers are invoked. Subclasses should override it in order to confirm that necessary preconditions are met before the Phase does its work. They should throw an appropriate AxisFault if not.

Parameters:

msgContext - the active MessageContext

Throws:

AxisFault - if a precondition is not met, or in case of other problem

cleanup

public void cleanup()

Specified by:

cleanup in interface Handler

init

public void init(HandlerDescription handlerdesc)

Description copied from interface: Handler

Initialize a Handler.

Specified by:

init in interface Handler

Parameters:

handlerdesc - the HandlerDescription for this Handler

invoke

public final Handler.InvocationResponse invoke(MessageContext msgctx)
                                        throws AxisFault

Invoke all the handlers in this Phase

Specified by:

invoke in interface Handler

Parameters:

msgctx - the current MessageContext

Returns:

An InvocationResponse that indicates what the next step in the message processing should be.

Throws:

AxisFault

flowComplete

public void flowComplete(MessageContext msgContext)

Description copied from interface: Handler

This method will be called on each registered handler that had its invoke(...) method called during the processing of the message, once the message processing has completed. During execution of the flowComplete's, handlers are invoked in the opposite order that they were invoked originally. Note that implementations SHOULD check msgContext.getFailureReason() to see if this is an error or a normal completion.

Specified by:

flowComplete in interface Handler

Parameters:

msgContext - the MessageContext to process with this Handler.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getHandlerCount

public int getHandlerCount()

getHandlerDesc

public HandlerDescription getHandlerDesc()

Description copied from interface: Handler

Gets the HandlerDescription of a handler.

Specified by:

getHandlerDesc in interface Handler

Returns:

Returns HandlerDescription.

getHandlers

public java.util.List<Handler> getHandlers()

Gets all the handlers in the phase.

Returns:

Returns an ArrayList of Handlers

getName

public java.lang.String getName()

Description copied from interface: Handler

Return the name of this Handler

Specified by:

getName in interface Handler

Returns:

the handler's name as a String

getParameter

public Parameter getParameter(java.lang.String name)

Description copied from interface: Handler

Get a Parameter from this Handler

Specified by:

getParameter in interface Handler

Parameters:

name - the name of the desired value

Returns:

the Parameter, or null.

getPhaseName

public java.lang.String getPhaseName()

Returns:

Returns the name.

setName

public void setName(java.lang.String phaseName)

setPhaseFirst

public void setPhaseFirst(Handler handler)
                   throws PhaseException

Add a Handler to the Phase in the very first position, and ensure no other Handler will come before it.

Parameters:

handler - the Handler to add

Throws:

PhaseException - if another Handler is already set as phaseFirst

setPhaseLast

public void setPhaseLast(Handler handler)
                  throws PhaseException

Add a Handler to the Phase in the very last position, and ensure no other Handler will come after it.

Parameters:

handler - the Handler to add

Throws:

PhaseException - if another Handler is already set as phaseLast

removeHandler

public void removeHandler(HandlerDescription handlerDesc)

Remove a given Handler from a phase using a HandlerDescription

Parameters:

handlerDesc - the HandlerDescription to remove