org.apache.stratos.messaging.message.processor.application.updater

Class ApplicationsUpdater

java.lang.Object

org.apache.stratos.messaging.message.processor.application.updater.ApplicationsUpdater

public class ApplicationsUpdater
extends Object

Used to lock the Topology for writes by messaging component

Acquire a write lock:

From root level, acquire read lock, and acquire a write lock only for the relevant sub tree.

Example 1: Acquiring write lock for a Cluster to modify the Cluster object - acquiring: public static void acquireWriteLockForCluster (String serviceName, String clusterId)

releasing: public static void releaseWriteLockForCluster (String serviceName, String clusterId)

Example 2: Acquiring write lock to add a new Cluster object - acquiring: public static void acquireWriteLockForService (String serviceName)

releasing: public static void releaseWriteLockForService (String serviceName)

Example 3: Acquiring the write lock to add a deploy a Cartridge (add a new Service) acquire: public static void acquireWriteLockForServices()

release: public static void releaseWriteLockForServices()

Constructor Summary

Constructors

Constructor and Description
ApplicationsUpdater()

Method Summary

Methods

Modifier and Type	Method and Description
static void	acquireWriteLockForApplication(String appId) Acquires write lock for the Application
static void	acquireWriteLockForApplications() Acquires write lock for all Applications
static void	releaseWriteLockForApplication(String appId) Releases write lock for the Application
static void	releaseWriteLockForApplications() Releases write lock for all Applications

Methods inherited from class java.lang.Object

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

Constructor Detail

ApplicationsUpdater

public ApplicationsUpdater()

Method Detail

acquireWriteLockForApplications

public static void acquireWriteLockForApplications()

Acquires write lock for all Applications

releaseWriteLockForApplications

public static void releaseWriteLockForApplications()

Releases write lock for all Applications

acquireWriteLockForApplication

public static void acquireWriteLockForApplication(String appId)

Acquires write lock for the Application

Parameters:

appId - Application id

releaseWriteLockForApplication

public static void releaseWriteLockForApplication(String appId)

Releases write lock for the Application

Parameters:

appId - Application id