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Java Source Code / Java Documentation » Workflow Engines » Dalma » dalma.impl

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

dalma.spi .ConversationSPI

dalma.impl .ConversationImpl

ConversationImpl

final public class ConversationImpl extends ConversationSPI implements Serializable(Code)

Represents a running conversation. TODO: we need a better way for a running user's conversation to expose information to the caller.

The monitor of this object is used to notify the completion of a conversation.

Persisting Conversation

There are two different modes of 'persistence' for this object (and fibers.) One is called hydration/dehydration, which is when we just persist the execution state of fibers to the disk to save memory usage (and to improve fault tolerance.)

The other is called save/load, which is when we persist the conversation object itself, but excluding the execution state of user code, to prepare for the engine to go down.
author:
Kohsuke Kawaguchi

Field Summary
final Counter	fiberId Generates fiber id.
final protected List<FiberImpl>	fibers All the FiberImpl s that belong to this conversation.
final int	id Every conversation gets unique ID (per engine).
transient boolean	isRemoving Set to true if the ConversationImpl.remove() operation is in progress.
transient Counter	runningCounts The number of Continuation s that are FiberState.RUNNING running right now.
transient Set<ConversationCondition>	waitList Other conversations that are blocking for the completion of this conversation.

Constructor Summary
	ConversationImpl(EngineImpl engine, Workflow target) Creates a new conversation that starts with the given target.

Method Summary
public void	addGenerator(GeneratorImpl g)
public static ConversationImpl	currentConversation() Returns a ConversationImpl instance that the current thread is executing.
public Date	getCompletionDate()
public EngineImpl	getEngine()
protected FiberImpl	getFiber(int id)
public GeneratorImpl	getGenerator(UUID id)
public int	getId()
public List<LogRecord>	getLog()
public Logger	getLogger()
public Date	getStartDate()
public ConversationState	getState() Gets the current state of the conversation.
public String	getTitle()
public synchronized void	join()
public static ConversationImpl	load(EngineImpl engine, File dir) Loads a ConversationImpl object from the disk.
synchronized void	onFiberEndedRunning(FiberImpl fiber)
synchronized void	onFiberStartedRunning(FiberImpl fiber)
public void	remove()
public void	setTitle(String title)

Field Detail

fiberId
final Counter fiberId(Code)
	Generates fiber id.

fibers
final protected List<FiberImpl> fibers(Code)
	All the FiberImpl s that belong to this conversation. Indexed by their id.

id
final int id(Code)
	Every conversation gets unique ID (per engine). This is used so that a serialized Conversation (as a part of the stack frame) can connect back to the running Conversation instance.

isRemoving
transient boolean isRemoving(Code)
	Set to true if the ConversationImpl.remove() operation is in progress. When true, Fiber s are prevented from being executed.

runningCounts
transient Counter runningCounts(Code)
	The number of Continuation s that are FiberState.RUNNING running right now.

waitList
transient Set<ConversationCondition> waitList(Code)
	Other conversations that are blocking for the completion of this conversation. Transient, because ConversationCondition s in this queue re-register themselves. Always non-null.

Constructor Detail

ConversationImpl
ConversationImpl(EngineImpl engine, Workflow target) throws IOException(Code)
	Creates a new conversation that starts with the given target.

Method Detail

addGenerator
public void addGenerator(GeneratorImpl g)(Code)

currentConversation
public static ConversationImpl currentConversation()(Code)
	Returns a ConversationImpl instance that the current thread is executing.

getCompletionDate
public Date getCompletionDate()(Code)

getEngine
public EngineImpl getEngine()(Code)

getFiber
protected FiberImpl getFiber(int id)(Code)

getGenerator
public GeneratorImpl getGenerator(UUID id)(Code)

getId
public int getId()(Code)

getLog
public List<LogRecord> getLog()(Code)

getLogger
public Logger getLogger()(Code)

getStartDate
public Date getStartDate()(Code)

getState
public ConversationState getState()(Code)
	Gets the current state of the conversation. always non-null.

getTitle
public String getTitle()(Code)

join
public synchronized void join() throws InterruptedException(Code)

load
public static ConversationImpl load(EngineImpl engine, File dir) throws IOException(Code)
	Loads a ConversationImpl object from the disk.

onFiberEndedRunning
synchronized void onFiberEndedRunning(FiberImpl fiber)(Code)

onFiberStartedRunning
synchronized void onFiberStartedRunning(FiberImpl fiber)(Code)

remove
public void remove()(Code)

setTitle
public void setTitle(String title)(Code)

Methods inherited from dalma.spi.ConversationSPI

abstract public void addGenerator(GeneratorImpl generator)(Code)(Java Doc)
public static ConversationSPI currentConversation()(Code)(Java Doc)
abstract public EngineSPI getEngine()(Code)(Java Doc)

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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