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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.component.scope;
import org.apache.tuscany.spi.component.AtomicComponent;
import org.apache.tuscany.spi.component.ScopeContainerMonitor;
import org.apache.tuscany.spi.component.TargetResolutionException;
import org.apache.tuscany.spi.component.WorkContext;
import org.apache.tuscany.spi.event.Event;
import org.apache.tuscany.spi.model.Scope;
/**
* A scope context which manages stateless atomic component instances in a non-pooled fashion
*
* @version $Rev$ $Date$
*/
public class StatelessScopeContainer extends AbstractScopeContainer {
public StatelessScopeContainer(WorkContext workContext, ScopeContainerMonitor monitor) {
super(workContext, monitor);
}
public Scope getScope() {
return Scope.STATELESS;
}
public synchronized void start() {
if (lifecycleState != UNINITIALIZED && lifecycleState != STOPPED) {
throw new IllegalStateException("Scope must be in UNINITIALIZED or STOPPED state [" + lifecycleState + "]");
}
lifecycleState = RUNNING;
}
public synchronized void stop() {
if (lifecycleState != RUNNING) {
throw new IllegalStateException("Scope in wrong state [" + lifecycleState + "]");
}
lifecycleState = STOPPED;
}
public void onEvent(Event event) {
}
public void register(AtomicComponent component) {
checkInit();
}
protected InstanceWrapper getInstanceWrapper(AtomicComponent component, boolean create)
throws TargetResolutionException {
// there never is a previously associated instance, return null
if (!create) {
return null;
}
InstanceWrapper ctx = new InstanceWrapperImpl(component, component.createInstance());
ctx.start();
return ctx;
}
}
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