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Glassfish example source code file (EntityContextImpl.java)

This example Glassfish source code file (EntityContextImpl.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Glassfish tags/keywords

basecontainer, ejb, ejbcontextimpl, ejbinvocation, ejbinvocation, ejbobject, ejbtimerservice, entitycontext, entitycontextimpl, entitycontextimpl, illegalstateexception, illegalstateexception, object, object, operation, reflection, rmi, servlet, web

The Glassfish EntityContextImpl.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 com.sun.ejb.containers;

import java.rmi.RemoteException;
import java.lang.reflect.Method;
import javax.ejb.*;

import org.glassfish.api.invocation.ComponentInvocation;

import com.sun.ejb.*;
import com.sun.enterprise.*;

/**
 * Implementation of EJBContext for EntityBeans
 *
 */

public class EntityContextImpl
    extends EJBContextImpl
    implements EntityContext
{
    private int lastTxStatus=-1;
    private boolean newlyActivated = false;
    private int nCallsInProgress = 0;
    private boolean dirty = false;
    private boolean inUnsetEntityContext = false;
    private boolean inEjbLoad = false;
    private boolean inEjbStore = false;
    
    private boolean cascadeDeleteBeforeEJBRemove = false;
    private boolean cascadeDeleteAfterSuperEJBRemove = false;

    //The following member variables are used to directly cache
    //	the EntityContext instead of enclosing it within a wrapper class.
    private Object		    _primaryKey;
    private int			    _pkHashCode;
    private EntityContextImpl	    _next;

    EntityContextImpl(Object ejb, BaseContainer container) {
        super(ejb, container);
    }
    
    int getLastTransactionStatus() {
        return lastTxStatus;
    }
    
    void setLastTransactionStatus(int status) {
        lastTxStatus = status;
    }
    
    void setInUnsetEntityContext(boolean flag) {
        inUnsetEntityContext = flag;
    }
    
    void setInEjbLoad(boolean flag) {
        inEjbLoad = flag;
    }
    
    void setInEjbStore(boolean flag) {
        inEjbStore = flag;
    }
    
    boolean isDirty() {
        return dirty;
    }
    
    void setDirty(boolean b) {
        dirty = b;
    }
    
    // overrides EJBContextImpl.setState
    void setState(BeanState s) {
        state = s;
        if ( state == BeanState.POOLED || 
            state == BeanState.DESTROYED )
        {
            dirty = false;
        }
    }
    
    
    boolean isNewlyActivated() {
        return newlyActivated;
    }
    
    void setNewlyActivated(boolean b) {
        newlyActivated = b;
    }
    
    boolean hasReentrantCall() {
        return (nCallsInProgress > 1);
    }
    
    synchronized void decrementCalls() {
        nCallsInProgress--;
    }
    
    synchronized void incrementCalls() {
        nCallsInProgress++;
    }
    
    boolean hasIdentity() {
        return( (ejbObjectImpl != null) || (ejbLocalObjectImpl != null) );
    }
    
    /**
     * Implementation of EntityContext method.
     */
    public Object getPrimaryKey() throws IllegalStateException {
        if ( ejbObjectImpl == null && ejbLocalObjectImpl == null ) {
            // There is no ejbObjectImpl/localObject in ejbCreate, ejbFind,
            // setEntityCtx etc
            throw new IllegalStateException("Primary key not available");
        }
        
        if ( ejbLocalObjectImpl != null )
            return ejbLocalObjectImpl.getKey();
        else
            return ejbObjectImpl.getKey();
    }
    
    /**
     * Implementation of EntityContext method, overrides EJBContextImpl method.
     */
    public EJBObject getEJBObject()
        throws IllegalStateException
    {
        if (! isRemoteInterfaceSupported) {
            throw new IllegalStateException("EJBObject not available");
        }

        if ( ejbStub == null ) {
            Object pkey = getPrimaryKey(); // throws IllegalStateException
            ejbStub = ((EntityContainer) container).getEJBObjectStub(pkey, null);
        }

        return ejbStub;
    }

    public TimerService getTimerService() throws IllegalStateException {
        if( state == BeanState.CREATED || inUnsetEntityContext || inFinder() ) {
            throw new IllegalStateException("Operation not allowed");
        }
     
        EJBTimerService timerService = container.ejbContainerUtilImpl.getEJBTimerService();
        if( timerService == null ) {
            throw new EJBException("EJB Timer service not available");
        }
        return new EJBTimerServiceWrapper(timerService, (EntityContext) this);
    }
    
    protected void checkAccessToCallerSecurity()
        throws IllegalStateException
    {
        if( state == BeanState.CREATED || inUnsetEntityContext ) {
            throw new IllegalStateException("Operation not allowed");
        }
        checkActivatePassivate();
        
        if (inEjbLoad || inEjbStore) {
            // Security access is allowed from these two methods.  In the
            // case that they are invoked as part of an ejbTimeout call,
            // getCallerPrincipal will return null and isCallerInRole will
            // be false
            return;
        }
    }
    
    public void checkTimerServiceMethodAccess()
        throws IllegalStateException
    {
        
        // Prohibit access from constructor, setEntityContext, ejbCreate,
        // ejbActivate, ejbPassivate, unsetEntityContext, ejbFind
        if( (state == BeanState.CREATED) ||
        inUnsetEntityContext ||
        inFinder() ||
        inActivatePassivate() ||
        !hasIdentity() ) {
            throw new IllegalStateException("Operation not allowed");
        }
        
    }
    
    public final boolean isCascadeDeleteAfterSuperEJBRemove() {
        return cascadeDeleteAfterSuperEJBRemove;
    }

    public final void setCascadeDeleteAfterSuperEJBRemove(boolean value) {
        this.cascadeDeleteAfterSuperEJBRemove = value;
    }

    public final boolean isCascadeDeleteBeforeEJBRemove() {
        return cascadeDeleteBeforeEJBRemove;
    }

    public final void setCascadeDeleteBeforeEJBRemove(boolean value) {
        this.cascadeDeleteBeforeEJBRemove = value;
    }

    private boolean inFinder() {
        boolean inFinder = false;
        ComponentInvocation ci = 
            container.invocationManager.getCurrentInvocation();
        if ( ci instanceof EjbInvocation ) {
            EjbInvocation inv = (EjbInvocation) ci;
            Method currentMethod = inv.method;
            inFinder = ( (currentMethod != null) && inv.isHome &&
                         currentMethod.getName().startsWith("find") );
        }
        return inFinder;
    }

    //Called from EntityContainer after an ejb is obtained from the pool.
    final void cachePrimaryKey() {
	Object pk = getPrimaryKey();
	this._primaryKey = pk;
	this._pkHashCode = pk.hashCode();
    }

    final void clearCachedPrimaryKey() {
	this._primaryKey = null;
    }

    //Called from IncompleteTxCache to get an already cached context
    final boolean doesMatch(BaseContainer baseContainer, int pkHashCode, Object pk) {
	return (
	    (container == baseContainer)
	    && (_pkHashCode == pkHashCode)
	    && (_primaryKey.equals(pk))
	);
    }

    final void _setNext(EntityContextImpl val) {
	this._next = val;
    }

    final EntityContextImpl _getNext() {
	return _next;
    }

    final int _getPKHashCode() {
	return this._pkHashCode;
    }

}

Other Glassfish examples (source code examples)

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