org.glassfish.persistence.ejb.entitybean.container.distributed.ReadOnlyBeanMessageCallBack Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of payara-client Show documentation
Appclient for Payara Server
The newest version!
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2012 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.persistence.ejb.entitybean.container.distributed;

import com.sun.ejb.containers.EjbContainerUtil;

import org.jvnet.hk2.annotations.Service;
import jakarta.inject.Inject;

import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.logging.LogDomains;
import fish.payara.nucleus.cluster.PayaraCluster;
import fish.payara.nucleus.eventbus.ClusterMessage;
import fish.payara.nucleus.eventbus.EventBus;
import fish.payara.nucleus.eventbus.MessageReceiver;
import java.io.Serializable;

@Service
public class ReadOnlyBeanMessageCallBack implements MessageReceiver, DistributedReadOnlyBeanNotifier {

    @Inject
    private EjbContainerUtil ejbContainerUtil;
    
    @Inject
    EventBus eventBus;
    
    @Inject
    PayaraCluster cluster;

    private static DistributedReadOnlyBeanService _readOnlyBeanService = DistributedEJBServiceFactory
            .getDistributedEJBService().getDistributedReadOnlyBeanService();

    private static final String GMS_READ_ONLY_COMPONENT_NAME = "__GMS__READ_ONLY_BEAN__";

    static final Logger _logger =
        LogDomains.getLogger(ReadOnlyBeanMessageCallBack.class, LogDomains.EJB_LOGGER);

    public void postConstruct() {
        if (!ejbContainerUtil.isDas()) {
            if (eventBus != null && cluster != null && cluster.isEnabled()) {
                _readOnlyBeanService.setDistributedReadOnlyBeanNotifier(this);
                eventBus.addMessageReceiver(GMS_READ_ONLY_COMPONENT_NAME, this);
            }
        }
    }
    

    @Override
    public void receiveMessage(ClusterMessage cm) {
        RefreshPayload message = (RefreshPayload) cm.getPayload();
        byte[] payload = message.payload;
        int size = payload.length;
        long ejbID = bytesToLong(payload, 0);
        if (size == 8) {
            _logger.log(Level.WARNING, "ReadOnlyBeanMessageCallBack: " + " Got message for ejbID: " + ejbID);
            _readOnlyBeanService.handleRefreshAllRequest(ejbID);
        } else {
            byte[] pkData = new byte[size - 8];
            System.arraycopy(payload, 8, pkData, 0, pkData.length);
            _readOnlyBeanService.handleRefreshRequest(ejbID, pkData);
            _logger.log(Level.WARNING, "ReadOnlyBeanMessageCallBack: " + " Handled message for ejbID: " + ejbID);
        }
    }    

    /**
     * This is called by the container after it has called refresh
     * 
     * @param ejbID
     *            the ejbID that uniquely identifies the container
     * @param pk
     *            The primary key of the bean(s) that is to be refreshed
     */
    public void notifyRefresh(long ejbID, byte[] pk) {
        int size = pk.length;
        byte[] payload = new byte[size + 8];

        longToBytes(ejbID, payload, 0);
        System.arraycopy(pk, 0, payload, 8, size);
        try {
            eventBus.publish(GMS_READ_ONLY_COMPONENT_NAME, new ClusterMessage(new RefreshPayload(payload)));
            _logger.log(Level.WARNING, "ReadOnlyBeanMessageCallBack: " + " Sent message for ejbID: " + ejbID);
        } catch (Exception ex) {
            _logger.log(Level.WARNING, "ReadOnlyBeanMessageCallBack: " + "Got exception during notifyRefresh", ex);
        }
    }

    /**
     * This is called by the container after it has called refresh
     * 
     * @param ejbID
     *            the ejbID that uniquely identifies the container
     * @param pk
     *            The primary key of the bean(s) that is to be refreshed
     */
    public void notifyRefreshAll(long ejbID) {
        byte[] payload = new byte[8];

        longToBytes(ejbID, payload, 0);
        try {
            eventBus.publish(GMS_READ_ONLY_COMPONENT_NAME, new ClusterMessage(new RefreshPayload(payload)));
        } catch (Exception ex) {
            _logger.log(Level.WARNING, "ReadOnlyBeanMessageCallBack: " + "Got exception during notifyRefreshAll", ex);
        }
    }

    /**
     * Marshal an long to a byte array. The bytes are in BIGENDIAN order. i.e.
     * array[offset] is the most-significant-byte and array[offset+7] is the
     * least-significant-byte.
     * 
     * @param array
     *            The array of bytes.
     * @param offset
     *            The offset from which to start marshalling.
     */
    private static void longToBytes(long value, byte[] array, int offset) {
        array[offset] = (byte) ((value >>> 56) & 0xFF);
        array[offset + 1] = (byte) ((value >>> 48) & 0xFF);
        array[offset + 2] = (byte) ((value >>> 40) & 0xFF);
        array[offset + 3] = (byte) ((value >>> 32) & 0xFF);
        array[offset + 4] = (byte) ((value >>> 24) & 0xFF);
        array[offset + 5] = (byte) ((value >>> 16) & 0xFF);
        array[offset + 6] = (byte) ((value >>> 8) & 0xFF);
        array[offset + 7] = (byte) ((value >>> 0) & 0xFF);
    }

    /**
     * Unmarshal a byte array to an long. Assume the bytes are in BIGENDIAN
     * order. i.e. array[offset] is the most-significant-byte and
     * array[offset+7] is the least-significant-byte.
     * 
     * @param array
     *            The array of bytes.
     * @param offset
     *            The offset from which to start unmarshalling.
     */
    private static long bytesToLong(byte[] array, int offset) {
        long l1, l2;

        l1 = (long) bytesToInt(array, offset) << 32;
        l2 = (long) bytesToInt(array, offset + 4) & 0xFFFFFFFFL;

        return (l1 | l2);
    }

    /**
     * Unmarshal a byte array to an integer. Assume the bytes are in BIGENDIAN
     * order. i.e. array[offset] is the most-significant-byte and
     * array[offset+3] is the least-significant-byte.
     * 
     * @param array
     *            The array of bytes.
     * @param offset
     *            The offset from which to start unmarshalling.
     */
    private static int bytesToInt(byte[] array, int offset) {
        int b1, b2, b3, b4;

        b1 = (array[offset] << 24) & 0xFF000000;
        b2 = (array[offset + 1] << 16) & 0x00FF0000;
        b3 = (array[offset + 2] << 8) & 0x0000FF00;
        b4 = (array[offset + 3] << 0) & 0x000000FF;

        return (b1 | b2 | b3 | b4);
    }
    
    private class RefreshPayload implements Serializable {
        byte payload[];

        private RefreshPayload(byte[] payload) {
            this.payload = payload;
        }
    }

}