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/**
*
* Copyright 2006 The Apache Software Foundation or its licensors as applicable
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tuscany.core.context.impl;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.tuscany.core.context.RuntimeEventListener;
import org.apache.tuscany.core.context.EventFilter;
import org.apache.tuscany.core.context.Lifecycle;
import org.apache.tuscany.core.context.filter.TrueFilter;
import org.apache.tuscany.core.context.event.Event;
/**
* @version $Rev$ $Date$
*/
public class AbstractLifecycle {
private static final EventFilter TRUE_FILTER = new TrueFilter();
protected String name;
protected int lifecycleState = Lifecycle.UNINITIALIZED;
// Listeners for context events
private Map<EventFilter, List<RuntimeEventListener>> listeners;
public AbstractLifecycle(String name) {
this.name = name;
}
public AbstractLifecycle() {
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getLifecycleState() {
return lifecycleState;
}
public void addListener(RuntimeEventListener listener) {
addListener(TRUE_FILTER, listener);
}
public void removeListener(RuntimeEventListener listener) {
assert (listener != null) : "Listener cannot be null";
synchronized(getListeners()){
for (List<RuntimeEventListener> currentList :getListeners().values() ) {
for(RuntimeEventListener current : currentList){
if (current == listener){
currentList.remove(current);
return;
}
}
}
}
}
public void addListener(EventFilter filter, RuntimeEventListener listener){
assert (listener != null) : "Listener cannot be null";
synchronized (getListeners()){
List<RuntimeEventListener> list = getListeners().get(filter);
if (list == null){
list = new CopyOnWriteArrayList<RuntimeEventListener>();
listeners.put(filter,list);
}
list.add(listener);
}
}
public void publish(Event event){
assert(event != null): "Event object was null";
for(Map.Entry<EventFilter,List<RuntimeEventListener>> entry :getListeners().entrySet()){
if(entry.getKey().match(event)){
for(RuntimeEventListener listener : entry.getValue()){
listener.onEvent(event);
}
}
}
}
protected Map<EventFilter, List<RuntimeEventListener>> getListeners(){
if (listeners == null) {
listeners = new ConcurrentHashMap<EventFilter, List<RuntimeEventListener>>();
}
return listeners;
}
public String toString() {
switch (lifecycleState) {
case (Lifecycle.CONFIG_ERROR):
return "Context [" + name + "] in state [CONFIG_ERROR]";
case (Lifecycle.ERROR):
return "Context [" + name + "] in state [ERROR]";
case (Lifecycle.INITIALIZING):
return "Context [" + name + "] in state [INITIALIZING]";
case (Lifecycle.INITIALIZED):
return "Context [" + name + "] in state [INITIALIZED]";
case (Lifecycle.RUNNING):
return "Context [" + name + "] in state [RUNNING]";
case (Lifecycle.STOPPING):
return "Context [" + name + "] in state [STOPPING]";
case (Lifecycle.STOPPED):
return "Context [" + name + "] in state [STOPPED]";
case (Lifecycle.UNINITIALIZED):
return "Context [" + name + "] in state [UNINITIALIZED]";
default:
return "Context [" + name + "] in state [UNKNOWN]";
}
}
}
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