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Glassfish example source code file (LockHandler.java)
The Glassfish LockHandler.java source code/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common Development * and Distribution License("CDDL") (collectively, the "License"). You * may not use this file except in compliance with the License. You can * obtain a copy of the License at * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html * or packager/legal/LICENSE.txt. See the License for the specific * language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each * file and include the License file at packager/legal/LICENSE.txt. * * GPL Classpath Exception: * Oracle designates this particular file as subject to the "Classpath" * exception as provided by Oracle in the GPL Version 2 section of the License * file that accompanied this code. * * Modifications: * If applicable, add the following below the License Header, with the fields * enclosed by brackets [] replaced by your own identifying information: * "Portions Copyright [year] [name of copyright owner]" * * Contributor(s): * If you wish your version of this file to be governed by only the CDDL or * only the GPL Version 2, indicate your decision by adding "[Contributor] * elects to include this software in this distribution under the [CDDL or GPL * Version 2] license." If you don't indicate a single choice of license, a * recipient has the option to distribute your version of this file under * either the CDDL, the GPL Version 2 or to extend the choice of license to * its licensees as provided above. However, if you add GPL Version 2 code * and therefore, elected the GPL Version 2 license, then the option applies * only if the new code is made subject to such option by the copyright * holder. */ package org.glassfish.ejb.deployment.annotation.handlers; import java.lang.annotation.Annotation; import java.lang.annotation.ElementType; import java.lang.reflect.AnnotatedElement; import java.lang.reflect.Method; import java.lang.reflect.Modifier; import java.util.List; import java.util.ArrayList; import javax.ejb.*; import com.sun.enterprise.deployment.util.TypeUtil; import com.sun.enterprise.deployment.MethodDescriptor; import org.glassfish.apf.AnnotationInfo; import org.glassfish.apf.AnnotatedElementHandler; import org.glassfish.apf.AnnotationProcessorException; import org.glassfish.apf.HandlerProcessingResult; import com.sun.enterprise.deployment.EjbSessionDescriptor; import com.sun.enterprise.deployment.annotation.context.EjbContext; import com.sun.enterprise.deployment.annotation.handlers.PostProcessor; import org.jvnet.hk2.annotations.Service; /** * This handler is responsible for handling the javax.ejb.Lock. * * @author Mahesh Kannan * @author Marina Vatkina */ @Service public class LockHandler extends AbstractAttributeHandler implements PostProcessor { public LockHandler() { } /** * @return the annoation type this annotation handler is handling */ public Class<? extends Annotation> getAnnotationType() { return Lock.class; } protected HandlerProcessingResult processAnnotation(AnnotationInfo ainfo, EjbContext[] ejbContexts) throws AnnotationProcessorException { Lock lockAnn = (Lock) ainfo.getAnnotation(); for (EjbContext ejbContext : ejbContexts) { if (ejbContext.getDescriptor() instanceof EjbSessionDescriptor) { EjbSessionDescriptor singletonDesc = (EjbSessionDescriptor) ejbContext.getDescriptor(); LockType lockType = lockAnn.value(); if( !singletonDesc.isSingleton() ) { throw new AnnotationProcessorException("@Lock is only permitted for " + "singleton session beans"); } if (ElementType.TYPE.equals(ainfo.getElementType())) { // Delay processing Class-level default until after methods are processed ejbContext.addPostProcessInfo(ainfo, this); } else { Method annMethod = (Method) ainfo.getAnnotatedElement(); // Only assign lock type if the method hasn't already been processed. // This correctly ignores overridden superclass methods and // applies the correct .xml overriding semantics. if(!matchesExistingReadOrWriteLockMethod(annMethod, singletonDesc)) { MethodDescriptor newMethodDesc = new MethodDescriptor(annMethod); if( lockAnn.value() == LockType.WRITE) { singletonDesc.addWriteLockMethod(newMethodDesc); } else { singletonDesc.addReadLockMethod(newMethodDesc); } } } } } return getDefaultProcessedResult(); } /** * @return an array of annotation types this annotation handler would * require to be processed (if present) before it processes it's own * annotation type. */ public Class<? extends Annotation>[] getTypeDependencies() { return new Class[]{Singleton.class, ConcurrencyManagement.class}; } protected boolean supportTypeInheritance() { return true; } /** * Set the default value (from class type annotation) on all * methods that don't have a value. */ public void postProcessAnnotation(AnnotationInfo ainfo, AnnotatedElementHandler aeHandler) throws AnnotationProcessorException { EjbContext ejbContext = (EjbContext)aeHandler; EjbSessionDescriptor ejbDesc = (EjbSessionDescriptor) ejbContext.getDescriptor(); Class classAn = (Class)ainfo.getAnnotatedElement(); Lock lockAnn = (Lock) ainfo.getAnnotation(); // At this point, all method-level specific annotations have been processed. // For non-private methods, find the ones from the EjbContext's // component definition view that are declared on this class. This will correctly // eliminate any overridden methods and provide the most-derived version of each. // Use the Class's declared methods list to get the private methods. List<Method> toProcess = new ArrayList Other Glassfish examples (source code examples)Here is a short list of links related to this Glassfish LockHandler.java source code file: |
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