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    1   /**
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *     http://www.apache.org/licenses/LICENSE-2.0
   10    *
   11    *  Unless required by applicable law or agreed to in writing, software
   12    *  distributed under the License is distributed on an "AS IS" BASIS,
   13    *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   14    *  See the License for the specific language governing permissions and
   15    *  limitations under the License.
   16    */
   17   package org.superbiz.registry;
   18   
   19   //START SNIPPET: code
   20   import static javax.ejb.LockType.READ;
   21   import static javax.ejb.LockType.WRITE;
   22   import javax.ejb.Lock;
   23   import javax.ejb.Singleton;
   24   import java.util.HashMap;
   25   import java.util.Map;
   26   import java.util.Collection;
   27   import java.util.ArrayList;
   28   
   29   @Singleton
   30   @Lock(READ)
   31   public class ComponentRegistryBean implements ComponentRegistry {
   32   
   33       private final Map<Class, Object> components = new HashMap<Class, Object>();
   34   
   35       public <T> T getComponent(Class<T> type) {
   36           return (T) components.get(type);
   37       }
   38   
   39       public Collection<?> getComponents() {
   40           return new ArrayList(components.values());
   41       }
   42   
   43       @Lock(WRITE)
   44       public <T> T setComponent(Class<T> type, T value) {
   45           return (T) components.put(type, value);
   46       }
   47   
   48       @Lock(WRITE)
   49       public <T> T removeComponent(Class<T> type) {
   50           return (T) components.remove(type);
   51       }
   52   
   53   }
   54   //END SNIPPET: code

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