com.sun.enterprise.resource.pool.PoolLifeCycleRegistry Maven / Gradle / Ivy
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package com.sun.enterprise.resource.pool;
import com.sun.enterprise.connectors.ConnectorRuntime;
import com.sun.enterprise.resource.listener.PoolLifeCycle;
import org.glassfish.resourcebase.resources.api.PoolInfo;
import jakarta.inject.Singleton;
import java.util.ArrayList;
import java.util.List;
/**
* Implementation of PoolLifeCycle to listen to events related to a
* connection pool creation or destroy. The registry allows multiple listeners
* (ex: pool monitoring or self management)
* to listen to the pool's lifecyle. Maintains a list of listeners for this pool
* identified by poolName.
*
* @author Shalini M
*/
@Singleton
public class PoolLifeCycleRegistry implements PoolLifeCycle {
//List of listeners
protected List lifeCycleListeners = new ArrayList();
private static PoolLifeCycleRegistry __poolLifeCycleRegistry =
new PoolLifeCycleRegistry();
public PoolLifeCycleRegistry() {
}
public static PoolLifeCycleRegistry getRegistry() {
if(__poolLifeCycleRegistry == null) {
throw new RuntimeException("PoolLifeCycleRegistry not initialized");
}
return __poolLifeCycleRegistry;
}
/**
* Add a listener to the list of pool life cycle listeners maintained by
* this registry for the poolName.
* @param poolName
* @param listener
*/
public void registerPoolLifeCycle(PoolLifeCycle listener) {
lifeCycleListeners.add(listener);
//Check if lifecycleListeners has already been set to this. There
//could be multiple listeners.
if(!(lifeCycleListeners.size() > 1)) {
//If the pool is already created, set this registry object to the pool.
PoolManager poolMgr = ConnectorRuntime.getRuntime().getPoolManager();
poolMgr.registerPoolLifeCycleListener(this);
}
}
/**
* Clear the list of pool lifecycle listeners maintained by the registry.
* This happens when a pool is destroyed so the information about its
* listeners need not be stored.
*/
public void unRegisterPoolLifeCycle(PoolLifeCycle listener) {
if (lifeCycleListeners != null) {
if(!lifeCycleListeners.isEmpty()) {
lifeCycleListeners.remove(listener);
} else {
//TODO V3 : think about unregistering the registry?
}
}
}
/**
* Invoke poolCreated for all listeners of this pool.
* @param poolInfo
*/
public void poolCreated(PoolInfo poolInfo) {
for (PoolLifeCycle listener : lifeCycleListeners) {
listener.poolCreated(poolInfo);
}
}
/**
* Invoke poolDestroyed for all listeners of this pool.
* @param poolInfo
*/
public void poolDestroyed(PoolInfo poolInfo) {
for (PoolLifeCycle listener : lifeCycleListeners) {
listener.poolDestroyed(poolInfo);
}
}
}