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Java Source Code / Java Documentation » Workflow Engines » spring webflow 1.0.4 » org.springframework.webflow.engine.builder

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Class Diagram

Java Document (Java Doc)

java.lang .Object

org.springframework.webflow.engine.builder .RefreshableFlowDefinitionHolder

RefreshableFlowDefinitionHolder

public class RefreshableFlowDefinitionHolder implements FlowDefinitionHolder(Code)

A flow definition holder that can detect changes on an underlying flow definition resource and refresh that resource automatically.

This class is threadsafe.

Note that this FlowDefinition holder uses a Flow assembler. This is normal since a Flow is a FlowDefinition ! This class bridges the abstract world of FlowDefinition flow definitions with the concrete world of Flow flow implementations .
See Also:   FlowDefinition
See Also:   Flow
See Also:   FlowAssembler
author:
   Keith Donald

Constructor Summary
public	RefreshableFlowDefinitionHolder(FlowAssembler assembler) Creates a new refreshable flow definition holder that uses the configured assembler (GOF director) to drive flow assembly, on initial use and on any resource change or refresh.

Method Summary
protected void	assembleFlow() Assemble the held flow definition, delegating to the configured FlowAssembler (director).
protected long	calculateLastModified() Helper that retrieves the last modified date by querying the backing flow resource.
protected FlowBuilder	getFlowBuilder() Returns the flow builder that actually builds the Flow definition.
public synchronized FlowDefinition	getFlowDefinition()
public String	getFlowDefinitionId()
protected long	getLastModified() Returns the last modifed date of the backed flow definition resource.
protected boolean	isAssembled() Returns a flag indicating if this holder has performed and completed flow definition assembly.
protected boolean	isAssembling() Returns a flag indicating if this holder is performing assembly.
public synchronized void	refresh()
protected void	refreshIfChanged() Reassemble the flow if its underlying resource has changed.

Constructor Detail

RefreshableFlowDefinitionHolder
public RefreshableFlowDefinitionHolder(FlowAssembler assembler)(Code)
	Creates a new refreshable flow definition holder that uses the configured assembler (GOF director) to drive flow assembly, on initial use and on any resource change or refresh. Parameters: assembler - the flow assembler to use

Method Detail

assembleFlow
protected void assembleFlow() throws FlowBuilderException(Code)
	Assemble the held flow definition, delegating to the configured FlowAssembler (director).

calculateLastModified
protected long calculateLastModified()(Code)
	Helper that retrieves the last modified date by querying the backing flow resource. the last modified date, or -1 if it could not be retrieved

getFlowBuilder
protected FlowBuilder getFlowBuilder()(Code)
	Returns the flow builder that actually builds the Flow definition.

getFlowDefinition
public synchronized FlowDefinition getFlowDefinition() throws FlowDefinitionConstructionException(Code)

getFlowDefinitionId
public String getFlowDefinitionId()(Code)

getLastModified
protected long getLastModified()(Code)
	Returns the last modifed date of the backed flow definition resource. the last modified date

isAssembled
protected boolean isAssembled()(Code)
	Returns a flag indicating if this holder has performed and completed flow definition assembly.

isAssembling
protected boolean isAssembling()(Code)
	Returns a flag indicating if this holder is performing assembly.

refresh
public synchronized void refresh() throws FlowBuilderException(Code)

refreshIfChanged
protected void refreshIfChanged()(Code)
	Reassemble the flow if its underlying resource has changed.

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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