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

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

org.springframework.webflow.engine.impl .FlowExecutionImpl

FlowExecutionImpl
public class FlowExecutionImpl implements FlowExecution,Externalizable(Code)
	Default implementation of FlowExecution that uses a stack-based data structure to manage spawned flow sessions. This class is closely coupled with package-private `FlowSessionImpl` and `RequestControlContextImpl`. The three classes work together to form a complete flow execution implementation based on a finite state machine. This implementation of FlowExecution is serializable so it can be safely stored in an HTTP session or other persistent store such as a file, database, or client-side form field. Once deserialized, the FlowExecutionImplStateRestorer strategy is expected to be used to restore the execution to a usable state. See Also: FlowExecutionImplFactory See Also: FlowExecutionImplStateRestorer author: Keith Donald author: Erwin Vervaet author: Ben Hale

Constructor Summary
public	FlowExecutionImpl() Default constructor required for externalizable serialization.
public	FlowExecutionImpl(Flow flow) Create a new flow execution executing the provided flow.
public	FlowExecutionImpl(Flow flow, FlowExecutionListener[] listeners, AttributeMap attributes) Create a new flow execution executing the provided flow.

Method Summary
protected FlowSession	activateSession(Flow flow) Activate a new `FlowSession` for the flow definition.
protected RequestControlContext	createControlContext(ExternalContext externalContext) Create a flow execution control context.
FlowSessionImpl	createFlowSession(Flow flow, FlowSessionImpl parent) Create a new flow session object.
public FlowSession	endActiveFlowSession() End the active flow session, popping it of the stack.
public FlowSession	getActiveSession()
FlowSessionImpl	getActiveSessionInternal() Returns the currently active flow session.
public AttributeMap	getAttributes()
public String	getCaption()
public MutableAttributeMap	getConversationScope()
public FlowDefinition	getDefinition()
String	getFlowId() Returns the flow definition id of this flow execution.
LinkedList	getFlowSessions() Returns the list of flow session maintained by this flow execution.
FlowExecutionListeners	getListeners() Returns the listener list.
FlowSessionImpl	getRootSession() Returns the flow session for the root flow of this flow execution.
ListIterator	getSubflowSessionIterator() Returns an iterator looping over the subflow sessions in this flow execution.
protected ViewSelection	handleException(FlowExecutionException exception, RequestControlContext context) Handles an exception that occured performing an operation on this flow execution.
boolean	hasSessions()
boolean	hasSubflowSessions()
public boolean	isActive()
protected ViewSelection	pause(RequestControlContext context, ViewSelection selectedView) Pause this flow execution.
public void	readExternal(ObjectInput in)
public ViewSelection	refresh(ExternalContext externalContext)
protected void	resume(RequestControlContext context) Resume this flow execution.
void	setAttributes(AttributeMap attributes) Restore the execution attributes of this flow execution.
void	setConversationScope(MutableAttributeMap conversationScope) Restore conversation scope for this flow execution.
protected void	setCurrentState(State newState) Set the state that is currently active in this flow execution.
void	setFlow(Flow flow) Restore the flow definition of this flow execution.
void	setListeners(FlowExecutionListeners listeners) Restore the listeners of this flow execution.
public ViewSelection	signalEvent(String eventId, ExternalContext externalContext)
public ViewSelection	start(MutableAttributeMap input, ExternalContext externalContext)
public String	toString()
public void	writeExternal(ObjectOutput out)

Constructor Detail

FlowExecutionImpl
public FlowExecutionImpl()(Code)
	Default constructor required for externalizable serialization. Should NOT be called programmatically.

FlowExecutionImpl
public FlowExecutionImpl(Flow flow)(Code)
	Create a new flow execution executing the provided flow. This constructor is mainly used for testing. Parameters: flow - the root flow of this flow execution

FlowExecutionImpl
public FlowExecutionImpl(Flow flow, FlowExecutionListener[] listeners, AttributeMap attributes)(Code)
	Create a new flow execution executing the provided flow. Parameters: flow - the root flow of this flow execution Parameters: listeners - the listeners interested in flow execution lifecycleevents Parameters: attributes - flow execution system attributes

Method Detail

activateSession
protected FlowSession activateSession(Flow flow)(Code)
	Activate a new `FlowSession` for the flow definition. Creates the new flow session and pushes it onto the stack. Parameters: flow - the flow definition the new flow session

createControlContext
protected RequestControlContext createControlContext(ExternalContext externalContext)(Code)
	Create a flow execution control context. Parameters: externalContext - the external context triggering this request

createFlowSession
FlowSessionImpl createFlowSession(Flow flow, FlowSessionImpl parent)(Code)
	Create a new flow session object. Subclasses can override this to return a special implementation if required. Parameters: flow - the flow that should be associated with the flow session Parameters: parent - the flow session that should be the parent of the newlycreated flow session (may be null) the newly created flow session

endActiveFlowSession
public FlowSession endActiveFlowSession()(Code)
	End the active flow session, popping it of the stack. the ended session

getActiveSession
public FlowSession getActiveSession()(Code)

getActiveSessionInternal
FlowSessionImpl getActiveSessionInternal() throws IllegalStateException(Code)
	Returns the currently active flow session. throws: IllegalStateException - this execution is not active

getAttributes
public AttributeMap getAttributes()(Code)

getCaption
public String getCaption()(Code)

getConversationScope
public MutableAttributeMap getConversationScope()(Code)

getDefinition
public FlowDefinition getDefinition()(Code)

getFlowId
String getFlowId()(Code)
	Returns the flow definition id of this flow execution.

getFlowSessions
LinkedList getFlowSessions()(Code)
	Returns the list of flow session maintained by this flow execution.

getListeners
FlowExecutionListeners getListeners()(Code)
	Returns the listener list. the attached execution listeners.

getRootSession
FlowSessionImpl getRootSession()(Code)
	Returns the flow session for the root flow of this flow execution.

getSubflowSessionIterator
ListIterator getSubflowSessionIterator()(Code)
	Returns an iterator looping over the subflow sessions in this flow execution.

handleException
protected ViewSelection handleException(FlowExecutionException exception, RequestControlContext context) throws FlowExecutionException(Code)
	Handles an exception that occured performing an operation on this flow execution. First trys the set of exception handlers associated with the offending state, then the handlers at the flow level. Parameters: exception - the exception that occured Parameters: context - the request control context the exception occured in the selected error view, never null throws: FlowExecutionException - rethrows the exception if it was not handledat the state or flow level

hasSessions
boolean hasSessions()(Code)
	Are there any flow sessions in this flow execution?

hasSubflowSessions
boolean hasSubflowSessions()(Code)
	Are there any sessions for sub flows in this flow execution?

isActive
public boolean isActive()(Code)

pause
protected ViewSelection pause(RequestControlContext context, ViewSelection selectedView)(Code)
	Pause this flow execution. Parameters: context - the request control context Parameters: selectedView - the initial selected view to render the selected view to render

readExternal
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException(Code)

refresh
public ViewSelection refresh(ExternalContext externalContext) throws FlowExecutionException(Code)

resume
protected void resume(RequestControlContext context)(Code)
	Resume this flow execution. Parameters: context - the state request context

setAttributes
void setAttributes(AttributeMap attributes)(Code)
	Restore the execution attributes of this flow execution.

setConversationScope
void setConversationScope(MutableAttributeMap conversationScope)(Code)
	Restore conversation scope for this flow execution.

setCurrentState
protected void setCurrentState(State newState)(Code)
	Set the state that is currently active in this flow execution. Parameters: newState - the new current state

setFlow
void setFlow(Flow flow)(Code)
	Restore the flow definition of this flow execution.

setListeners
void setListeners(FlowExecutionListeners listeners)(Code)
	Restore the listeners of this flow execution.

signalEvent
public ViewSelection signalEvent(String eventId, ExternalContext externalContext) throws FlowExecutionException(Code)

start
public ViewSelection start(MutableAttributeMap input, ExternalContext externalContext) throws FlowExecutionException(Code)

toString
public String toString()(Code)

writeExternal
public void writeExternal(ObjectOutput out) throws IOException(Code)

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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