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AbstractDeploymentScanner (JBoss System API) - JBoss 3.2.7 system API Documentation 英文版文档

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org.jboss.deployment.scanner
Class AbstractDeploymentScanner

java.lang.Object
  org.jboss.mx.util.JBossNotificationBroadcasterSupport
      org.jboss.system.ServiceMBeanSupport
          org.jboss.deployment.scanner.AbstractDeploymentScanner

All Implemented Interfaces:

DeploymentScanner, DeploymentScannerMBean, javax.management.MBeanRegistration, javax.management.NotificationBroadcaster, javax.management.NotificationEmitter, Service, ServiceMBean

Direct Known Subclasses:

URLDeploymentScanner, URLDirectoryScanner

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public abstract class AbstractDeploymentScanner

extends ServiceMBeanSupport

implements DeploymentScanner, DeploymentScannerMBean

An abstract support class for implementing a deployment scanner.

Provides the implementation of period-based scanning, as well as Deployer integration.

Sub-classes only need to implement DeploymentScanner.scan().

Version:

$Revision: 1.9.2.5 $

Author:

Jason Dillon, Scott.Stark@jboss.org

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Nested Class Summary
class	AbstractDeploymentScanner.ScannerThread           Should use Timer/TimerTask instead? This has some issues with interaction with ScanEnabled attribute.

 

Field Summary
protected  Deployer	deployer           A proxy to the deployer we are using.
protected  org.jboss.util.MuBoolean	scanEnabled           True if period based scanning is enabled.
protected  AbstractDeploymentScanner.ScannerThread	scannerThread           The scanner thread.
protected  org.jboss.util.MuLong	scanPeriod           The scan period in milliseconds

 

Fields inherited from class org.jboss.system.ServiceMBeanSupport

log, server, SERVICE_CONTROLLER_SIG, serviceName

 

Fields inherited from interface org.jboss.system.ServiceMBean

CREATE_EVENT, CREATED, DESTROY_EVENT, DESTROYED, FAILED, REGISTERED, START_EVENT, STARTED, STARTING, states, STOP_EVENT, STOPPED, STOPPING, UNREGISTERED

 

Constructor Summary

AbstractDeploymentScanner()

 

Method Summary
protected  void	createService()           Sub-classes should override this method to provide custum 'create' logic.
protected  void	destroyService()           Sub-classes should override this method to provide custum 'destroy' logic.
javax.management.ObjectName	getDeployer()           Get the ObjectName of the Deployer which we are using.
long	getScanPeriod()           Get the scan period for the scanner.
boolean	isScanEnabled()           Check if period based scanning is enabled.
abstract  void	scan()           This is here to work around a bug in the IBM vm that causes an AbstractMethodError to be thrown when the ScannerThread calls scan.
void	setDeployer(javax.management.ObjectName deployerName)           The ObjectName of the Deployer which we will use.
void	setScanEnabled(boolean flag)           Disable or enable the period based deployment scanning.
void	setScanPeriod(long period)           Period must be >= 0.
protected  void	startService()           Sub-classes should override this method to provide custum 'start' logic.
protected  void	stopService()           Sub-classes should override this method to provide custum 'stop' logic.

 

Methods inherited from class org.jboss.system.ServiceMBeanSupport

create, destroy, getLog, getName, getNextNotificationSequenceNumber, getObjectName, getServer, getServiceName, getState, getStateString, jbossInternalCreate, jbossInternalDescription, jbossInternalDestroy, jbossInternalLifecycle, jbossInternalStart, jbossInternalStop, postDeregister, postRegister, preDeregister, preRegister, start, stop

 

Methods inherited from class org.jboss.mx.util.JBossNotificationBroadcasterSupport

addNotificationListener, getNotificationInfo, handleNotification, removeNotificationListener, removeNotificationListener, sendNotification

 

Methods inherited from class java.lang.Object

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

 

Methods inherited from interface org.jboss.system.Service

create, destroy, start, stop

 

Methods inherited from interface org.jboss.system.ServiceMBean

getName, getState, getStateString, jbossInternalLifecycle

 

Field Detail

scanPeriod

protected org.jboss.util.MuLong scanPeriod

The scan period in milliseconds

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scanEnabled

protected org.jboss.util.MuBoolean scanEnabled

True if period based scanning is enabled.

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deployer

protected Deployer deployer

A proxy to the deployer we are using.

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scannerThread

protected AbstractDeploymentScanner.ScannerThread scannerThread

The scanner thread.

Constructor Detail

AbstractDeploymentScanner

public AbstractDeploymentScanner()

Method Detail

setDeployer

public void setDeployer(javax.management.ObjectName deployerName)

Description copied from interface: DeploymentScanner

The ObjectName of the Deployer which we will use.

Specified by:

setDeployer in interface DeploymentScanner

Parameters:

deployerName - The object name of the deployer to use.

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getDeployer

public javax.management.ObjectName getDeployer()

Description copied from interface: DeploymentScanner

Get the ObjectName of the Deployer which we are using.

Specified by:

getDeployer in interface DeploymentScanner

Returns:

The object name of the deployer we are using.

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setScanPeriod

public void setScanPeriod(long period)

Period must be >= 0.

Specified by:

setScanPeriod in interface DeploymentScanner

Parameters:

period - This is the time in milliseconds between scans.

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getScanPeriod

public long getScanPeriod()

Description copied from interface: DeploymentScanner

Get the scan period for the scanner.

Specified by:

getScanPeriod in interface DeploymentScanner

Returns:

This is the time in milliseconds between scans.

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setScanEnabled

public void setScanEnabled(boolean flag)

Description copied from interface: DeploymentScanner

Disable or enable the period based deployment scanning.

Manual scanning can still be performed by calling DeploymentScanner.scan().

Specified by:

setScanEnabled in interface DeploymentScanner

Parameters:

flag - True to enable or false to disable period based scanning.

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isScanEnabled

public boolean isScanEnabled()

Description copied from interface: DeploymentScanner

Check if period based scanning is enabled.

Specified by:

isScanEnabled in interface DeploymentScanner

Returns:

True if enabled, false if disabled.

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scan

public abstract void scan()
                   throws Exception

This is here to work around a bug in the IBM vm that causes an AbstractMethodError to be thrown when the ScannerThread calls scan.

Specified by:

scan in interface DeploymentScanner

Throws:

Exception

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createService

protected void createService()
                      throws Exception

Description copied from class: ServiceMBeanSupport

Sub-classes should override this method to provide custum 'create' logic.

This method is empty, and is provided for convenience when concrete service classes do not need to perform anything specific for this state change.

Overrides:

createService in class ServiceMBeanSupport

Throws:

Exception

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startService

protected void startService()
                     throws Exception

Description copied from class: ServiceMBeanSupport

Sub-classes should override this method to provide custum 'start' logic.

This method is empty, and is provided for convenience when concrete service classes do not need to perform anything specific for this state change.

Overrides:

startService in class ServiceMBeanSupport

Throws:

Exception

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stopService

protected void stopService()
                    throws Exception

Description copied from class: ServiceMBeanSupport

Sub-classes should override this method to provide custum 'stop' logic.

This method is empty, and is provided for convenience when concrete service classes do not need to perform anything specific for this state change.

Overrides:

stopService in class ServiceMBeanSupport

Throws:

Exception

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destroyService

protected void destroyService()
                       throws Exception

Description copied from class: ServiceMBeanSupport

Sub-classes should override this method to provide custum 'destroy' logic.

This method is empty, and is provided for convenience when concrete service classes do not need to perform anything specific for this state change.

Overrides:

destroyService in class ServiceMBeanSupport

Throws:

Exception

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