001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License.
016     */
017    //
018    // This source code implements specifications defined by the Java
019    // Community Process. In order to remain compliant with the specification
020    // DO NOT add / change / or delete method signatures!
021    //
022    package javax.ejb.embeddable;
023    
024    import java.util.Collections;
025    import java.util.List;
026    
027    import javax.ejb.EJBException;
028    import javax.ejb.spi.EJBContainerProvider;
029    import org.apache.geronimo.osgi.locator.ProviderLocator;
030    
031    public abstract class EJBContainer {
032    
033        public static final String PROVIDER = "javax.ejb.embeddable.provider";
034        public static final String APP_NAME = "javax.ejb.embeddable.appName";
035        public static final String MODULES = "javax.ejb.embeddable.modules";
036    
037        public EJBContainer() {
038        }
039    
040        public abstract void close();
041    
042        public static EJBContainer createEJBContainer() {
043            return createEJBContainer(Collections.EMPTY_MAP);
044        }
045    
046        public static EJBContainer createEJBContainer(java.util.Map<?, ?> properties) {
047            if (properties == null) {
048                properties = Collections.EMPTY_MAP;
049            }
050    
051            try {
052                ClassLoader loader = Thread.currentThread().getContextClassLoader();
053                // go check the loader files.
054                List<Object> providers = ProviderLocator.getServices(EJBContainerProvider.class.getName(), EJBContainer.class, loader);
055                for (Object o : providers) {
056                    EJBContainer container = ((EJBContainerProvider) o).createEJBContainer(properties);
057                    if (container != null) {
058                        return container;
059                    }
060                }
061                throw new EJBException("Provider error. No provider definition found");
062            } catch (EJBException e) {
063                // if the container provider throws an EJBException, don't wrap another one 
064                // around the original. 
065                throw e;
066            } catch (Exception e) {
067                throw new EJBException("Provider error. No provider found", e);
068            }
069        }
070    
071        public abstract javax.naming.Context getContext();
072    }