io.continual.services.processor.engine.runtime

Class Engine

java.lang.Object

io.continual.services.SimpleService

io.continual.services.processor.engine.runtime.Engine

All Implemented Interfaces:

Service

public class Engine
extends SimpleService
implements Service

An engine for message stream processing.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	Engine.StdStreamProcessingContext

Nested classes/interfaces inherited from interface io.continual.services.Service

Service.FailedToStart

Constructor Summary

Constructors

Constructor and Description
Engine(Program p) Construct an engine to run a given program.

Method Summary

Modifier and Type	Method and Description
StreamProcessingContext	getStreamContextFor(String sourceName) Get the stream context for a given source
String	getUserData(String key)
boolean	isRunning() Is this engine running? (That is, does it have processing threads that have not yet exited?)
protected void	onStartRequested()
protected void	onStopRequested()
void	removeUserData(String key)
Engine	setUserData(String key, String value)
void	startAndWait() Start the engine and wait for its completion.
void	waitForCompletion()

Methods inherited from class io.continual.services.SimpleService

requestFinish, start

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.continual.services.Service

requestFinish, start

Constructor Detail

Engine

public Engine(Program p)

Construct an engine to run a given program.

Parameters:

p -

Method Detail

isRunning

public boolean isRunning()

Is this engine running? (That is, does it have processing threads that have not yet exited?)

Specified by:

isRunning in interface Service

Overrides:

isRunning in class SimpleService

startAndWait

public void startAndWait()
                  throws Service.FailedToStart

Start the engine and wait for its completion.

Throws:

FailedToStart

Service.FailedToStart

waitForCompletion

public void waitForCompletion()

getStreamContextFor

public StreamProcessingContext getStreamContextFor(String sourceName)

Get the stream context for a given source

Parameters:

sourceName -

Returns:

a stream context, or null if none exists

setUserData

public Engine setUserData(String key,
                          String value)

getUserData

public String getUserData(String key)

removeUserData

public void removeUserData(String key)

onStartRequested

protected void onStartRequested()
                         throws Service.FailedToStart

Overrides:

onStartRequested in class SimpleService

Throws:

Service.FailedToStart

onStopRequested

protected void onStopRequested()

Overrides:

onStopRequested in class SimpleService