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ActiveMQ example source code file (JournalFacade.java)

This example ActiveMQ source code file (JournalFacade.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 - ActiveMQ tags/keywords

asyncdatamanager, bytesequence, illegalstateexception, illegalstateexception, invalidrecordlocationexception, io, ioexception, ioexception, journalfacade, location, packet, recordlocation, recordlocation, recordlocationfacade, recordlocationfacade

The ActiveMQ JournalFacade.java source code

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.activemq.kaha.impl.async;

import java.io.IOException;

import org.apache.activeio.journal.InvalidRecordLocationException;
import org.apache.activeio.journal.Journal;
import org.apache.activeio.journal.JournalEventListener;
import org.apache.activeio.journal.RecordLocation;
import org.apache.activeio.packet.ByteArrayPacket;
import org.apache.activeio.packet.Packet;
import org.apache.activemq.util.ByteSequence;

/**
 * Provides a Journal Facade to the DataManager.
 * 
 * 
 */
public final class JournalFacade implements Journal {

    private final AsyncDataManager dataManager;

    public static class RecordLocationFacade implements RecordLocation {
        private final Location location;

        public RecordLocationFacade(Location location) {
            this.location = location;
        }

        public Location getLocation() {
            return location;
        }

        public int compareTo(Object o) {
            RecordLocationFacade rlf = (RecordLocationFacade)o;
            int rc = location.compareTo(rlf.location);
            return rc;
        }
    }

    public JournalFacade(AsyncDataManager dataManager) {
        this.dataManager = dataManager;
    }

    private static RecordLocation convertToRecordLocation(Location location) {
        if (location == null) {
            return null;
        }
        return new RecordLocationFacade(location);
    }

    private static Location convertFromRecordLocation(RecordLocation location) {

        if (location == null) {
            return null;
        }

        return ((RecordLocationFacade)location).getLocation();
    }

    public void close() throws IOException {
        dataManager.close();
    }

    public RecordLocation getMark() throws IllegalStateException {
        return convertToRecordLocation(dataManager.getMark());
    }

    public RecordLocation getNextRecordLocation(RecordLocation location) throws InvalidRecordLocationException, IOException, IllegalStateException {
        return convertToRecordLocation(dataManager.getNextLocation(convertFromRecordLocation(location)));
    }

    public Packet read(RecordLocation location) throws InvalidRecordLocationException, IOException, IllegalStateException {
        ByteSequence rc = dataManager.read(convertFromRecordLocation(location));
        if (rc == null) {
            return null;
        }
        return new ByteArrayPacket(rc.getData(), rc.getOffset(), rc.getLength());
    }

    public void setJournalEventListener(JournalEventListener listener) throws IllegalStateException {
    }

    public void setMark(RecordLocation location, boolean sync) throws InvalidRecordLocationException, IOException, IllegalStateException {
        dataManager.setMark(convertFromRecordLocation(location), sync);
    }

    public RecordLocation write(Packet packet, boolean sync) throws IOException, IllegalStateException {
        org.apache.activeio.packet.ByteSequence data = packet.asByteSequence();
        ByteSequence sequence = new ByteSequence(data.getData(), data.getOffset(), data.getLength());
        return convertToRecordLocation(dataManager.write(sequence, sync));
    }
    
    public RecordLocation write(Packet packet, Runnable onComplete) throws IOException, IllegalStateException {
        org.apache.activeio.packet.ByteSequence data = packet.asByteSequence();
        ByteSequence sequence = new ByteSequence(data.getData(), data.getOffset(), data.getLength());
        return convertToRecordLocation(dataManager.write(sequence, onComplete));
    }

}

Other ActiveMQ examples (source code examples)

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