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/**
*
* Copyright 2005 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.scope;
import org.apache.tuscany.core.builder.ContextFactory;
import org.apache.tuscany.core.context.EventContext;
import org.apache.tuscany.core.context.Context;
import org.apache.tuscany.core.context.CoreRuntimeException;
import org.apache.tuscany.core.context.Lifecycle;
import org.apache.tuscany.core.context.event.Event;
import org.apache.tuscany.core.context.event.ModuleStop;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* A container that manages stateless components.
*
* @version $Rev$ $Date$
*/
public class StatelessScopeContext extends AbstractScopeContext {
// Component contexts keyed by name
private Map<String, Context> contexts;
public StatelessScopeContext(EventContext eventContext) {
super(eventContext);
setName("Stateless Scope");
}
public synchronized void start() {
if (lifecycleState != UNINITIALIZED) {
throw new IllegalStateException("Scope must be in UNINITIALIZED state [" + lifecycleState + "]");
}
lifecycleState = RUNNING;
}
public synchronized void stop() {
if (lifecycleState != RUNNING) {
throw new IllegalStateException("Scope in wrong state [" + lifecycleState + "]");
}
contexts = null;
lifecycleState = STOPPED;
}
public void registerFactory(ContextFactory<Context> configuration) {
contextFactories.put(configuration.getName(), configuration);
if (contexts != null) {
contexts.put(configuration.getName(), configuration.createContext());
}
}
public void onEvent(Event event){
if (event instanceof ModuleStop) {
shutdownContexts();
}
}
public boolean isCacheable() {
return true;
}
public Context getContext(String ctxName) {
prepare();
return contexts.get(ctxName);
}
public Context getContextByKey(String ctxName, Object key) {
return getContext(ctxName);
}
public void removeContext(String ctxName) {
if (contexts == null){
return;
}
contexts.remove(ctxName);
}
public void removeContextByKey(String ctxName, Object key) {
removeContext(ctxName);
}
private void prepare() throws CoreRuntimeException {
if (lifecycleState != RUNNING) {
throw new IllegalStateException("Scope not in INITIALIZED state [" + lifecycleState + "]");
}
if (contexts == null) {
contexts = new ConcurrentHashMap<String, Context> ();
for (ContextFactory<Context> config : contextFactories.values()) {
for (int i = 0; i < contextFactories.size(); i++) {
Context context = config.createContext();
context.start();
contexts.put(context.getName(), context);
}
}
}
}
private void shutdownContexts(){
if (contexts == null){
return;
}
for(Lifecycle context: contexts.values()) {
try {
if (context.getLifecycleState() == RUNNING) {
context.stop();
}
} catch (CoreRuntimeException e){
// TODO send monitoring event
}
}
contexts = null;
}
}
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