package org.codehaus.plexus.component.manager;
   
   /*
    * Copyright 2001-2006 Codehaus Foundation.
    *
    * 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.
   */
  
  import java.util.concurrent.atomic.AtomicLong;
  
  import org.codehaus.plexus.MutablePlexusContainer;
  import org.codehaus.plexus.classworlds.realm.ClassRealm;
  import org.codehaus.plexus.component.factory.ComponentInstantiationException;
  import org.codehaus.plexus.component.repository.ComponentDescriptor;
  import org.codehaus.plexus.component.repository.exception.ComponentLifecycleException;
  import org.codehaus.plexus.lifecycle.LifecycleHandler;
  import org.codehaus.plexus.personality.plexus.lifecycle.phase.PhaseExecutionException;
  
  /**
   * Manages a component manager.
   * Determines when a component is shutdown, and when it's started up. Each
   * manager deals with only one component class, though may handle multiple
   * instances of this class.
   *
   * @author Jason van Zyl
   *
   */
  public interface ComponentManager<T> {
      String ROLE = ComponentManager.class.getName();
  
      /**
       * @deprecated for internal use only.. will be removed
       */
      AtomicLong NEXT_START_ID = new AtomicLong(1);
  
      int getConnections();
  
      /**
       * @return {@link LifecycleHandler}.
       * @deprecated use start instead
       */
      LifecycleHandler getLifecycleHandler();
  
      void dispose() throws ComponentLifecycleException;
  
      void release(Object component) throws ComponentLifecycleException;
  
      T getComponent() throws ComponentInstantiationException, ComponentLifecycleException;
  
      ComponentDescriptor<T> getComponentDescriptor();
  
      Class<? extends T> getType();
  
      String getRole();
  
      String getRoleHint();
  
      MutablePlexusContainer getContainer();
  
      void dissociateComponentRealm(ClassRealm realm) throws ComponentLifecycleException;
  
      ClassRealm getRealm();
  
      void start(Object component) throws PhaseExecutionException;
  
      /**
       * @return The start id.
       * @deprecated for internal use only.. will be removed
       */
      long getStartId();
  }