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1   package org.codehaus.plexus.component.manager;
2   
3   /*
4    * Copyright 2001-2006 Codehaus Foundation.
5    *
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * You may obtain a copy of the License at
9    *
10   *      http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  import org.codehaus.plexus.MutablePlexusContainer;
20  import org.codehaus.plexus.component.factory.ComponentInstantiationException;
21  import org.codehaus.plexus.component.repository.ComponentDescriptor;
22  import org.codehaus.plexus.component.repository.exception.ComponentLifecycleException;
23  import org.codehaus.plexus.lifecycle.LifecycleHandler;
24  
25  /**
26   * Creates a new component manager for every lookup
27   *
28   * @author Jason van Zyl
29   *
30   */
31  public class PerLookupComponentManager<T> extends AbstractComponentManager<T> {
32      public PerLookupComponentManager(
33              MutablePlexusContainer container,
34              LifecycleHandler lifecycleHandler,
35              ComponentDescriptor<T> componentDescriptor,
36              String role,
37              String roleHint) {
38          super(container, lifecycleHandler, componentDescriptor, role, roleHint);
39      }
40  
41      public void dispose() {}
42  
43      public T getComponent() throws ComponentInstantiationException, ComponentLifecycleException {
44          T component = createComponentInstance();
45  
46          return component;
47      }
48  
49      public void release(Object component) throws ComponentLifecycleException {
50          decrementConnectionCount();
51          endComponentLifecycle(component);
52          // non cleanup map references for per-lookup cause leak
53          componentContextRealms.remove(component);
54      }
55  }