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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.system.context;
import org.apache.tuscany.core.builder.ObjectFactory;
import org.apache.tuscany.core.context.AbstractContext;
import org.apache.tuscany.core.context.QualifiedName;
import org.apache.tuscany.core.context.CoreRuntimeException;
import org.apache.tuscany.core.context.EntryPointContext;
import org.apache.tuscany.core.context.TargetException;
/**
* Manages an entry point into a system module. System entry points cache a direct (i.e. non-proxied) reference to a
* component instance.
*
* @version $Rev$ $Date$
*/
public class SystemEntryPointContext extends AbstractContext implements EntryPointContext {
// responsible for resolving the component implementation instance exposed by the entry point
private ObjectFactory factory;
// a reference to the component's implementation instance exposed by the entry point
private Object cachedInstance;
// ----------------------------------
// Constructors
// ----------------------------------
public SystemEntryPointContext(String name, ObjectFactory factory) {
super(name);
assert (factory != null) : "Object factory was null";
this.factory = factory;
}
// ----------------------------------
// Methods
// ----------------------------------
public Object getInstance(QualifiedName qName) throws TargetException {
return getInstance(qName, true);
}
public Object getInstance(QualifiedName qName, boolean notify) throws TargetException {
try {
if (cachedInstance == null) {
cachedInstance = factory.getInstance();
}
return cachedInstance;
} catch (TargetException e) {
e.addContextName(getName());
throw e;
}
}
public void start() throws CoreRuntimeException {
lifecycleState = RUNNING;
}
public void stop() throws CoreRuntimeException {
lifecycleState = STOPPED;
}
public Object getImplementationInstance() throws TargetException{
return getInstance(null);
}
public Object getImplementationInstance(boolean notify) throws TargetException{
return getInstance(null,notify);
}
}
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