bamboo.lss
Class StageManager

java.lang.Object
  bamboo.lss.StageManager

All Implemented Interfaces:

ManagerIF

public class StageManager
extends Object
implements ManagerIF

A manager for DustDevil. Adapted from the one in SOSS to allow for dynamic creation of stages.

Version:

$Id: StageManager.java,v 1.4 2003/10/05 18:22:11 srhea Exp $

Author:

Sean C. Rhea

Field Summary

Fields inherited from interface seda.sandStorm.api.ManagerIF

MAINSINK

Constructor Summary

StageManager(SandstormConfigIF config)

Method Summary

void	addStage(String stagename, StageIF stage)
StageIF	createStage(String stagename, EventHandlerIF handler, String[] initargs)
void	destroyStage(String stagename) Note that calling this slightly violates the semantics of this method as defined in ManagerIF.
SandstormConfigIF	getConfig() Returns a copy of the SandstormConfigIF for this Manager.
ProfilerIF	getProfiler() Returns a handle to the system profiler.
SignalMgrIF	getSignalMgr() Returns a handle to the system signal interface.
StageIF	getStage(String stagename)

Methods inherited from class java.lang.Object

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

Constructor Detail

StageManager

public StageManager(SandstormConfigIF config)

Method Detail

addStage

public void addStage(String stagename,
                     StageIF stage)

getStage

public StageIF getStage(String stagename)
                 throws NoSuchStageException

Specified by:

getStage in interface ManagerIF

Throws:

NoSuchStageException

createStage

public StageIF createStage(String stagename,
                           EventHandlerIF handler,
                           String[] initargs)
                    throws Exception

Specified by:

createStage in interface ManagerIF

Throws:

Exception

getSignalMgr

public SignalMgrIF getSignalMgr()

Returns a handle to the system signal interface.

Specified by:

getSignalMgr in interface ManagerIF

getProfiler

public ProfilerIF getProfiler()

Returns a handle to the system profiler.

Specified by:

getProfiler in interface ManagerIF

getConfig

public SandstormConfigIF getConfig()

Returns a copy of the SandstormConfigIF for this Manager. This contains all of the global options used by the runtime system. Note that modifying any options of this copy does not in fact change the runtime parameters of the system; this is used for informational purposes only.

Specified by:

getConfig in interface ManagerIF

destroyStage

public void destroyStage(String stagename)
                  throws Exception

Note that calling this slightly violates the semantics of this method as defined in ManagerIF. It does not remove all references to the stage, because the soss Main stage still has a reference to the node's classifier, which contains references to the sink, which has a reference to the EventHandler itself. So the stage won't completely disappear until the reference to the classifier is destroyed (see soss.core.Main.removeNode)

Specified by:

destroyStage in interface ManagerIF

Throws:

Exception