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ActiveMQ example source code file (JournalPersistenceAdapterFactory.java)

This example ActiveMQ source code file (JournalPersistenceAdapterFactory.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

file, file, io, ioexception, ioexception, jdbcpersistenceadapter, journal, journal, journal_locked_wait_delay, journalimpl, journalpersistenceadapter, logger, statements, taskrunnerfactory, taskrunnerfactory

The ActiveMQ JournalPersistenceAdapterFactory.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.store.journal;

import java.io.File;
import java.io.IOException;

import org.apache.activeio.journal.Journal;
import org.apache.activeio.journal.active.JournalImpl;
import org.apache.activeio.journal.active.JournalLockedException;
import org.apache.activemq.store.PersistenceAdapter;
import org.apache.activemq.store.PersistenceAdapterFactory;
import org.apache.activemq.store.jdbc.DataSourceSupport;
import org.apache.activemq.store.jdbc.JDBCAdapter;
import org.apache.activemq.store.jdbc.JDBCPersistenceAdapter;
import org.apache.activemq.store.jdbc.Statements;
import org.apache.activemq.thread.TaskRunnerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Factory class that can create PersistenceAdapter objects.
 * 
 * @org.apache.xbean.XBean
 * 
 */
public class JournalPersistenceAdapterFactory extends DataSourceSupport implements PersistenceAdapterFactory {

    private static final int JOURNAL_LOCKED_WAIT_DELAY = 10 * 1000;

    private static final Logger LOG = LoggerFactory.getLogger(JournalPersistenceAdapterFactory.class);

    private int journalLogFileSize = 1024 * 1024 * 20;
    private int journalLogFiles = 2;
    private TaskRunnerFactory taskRunnerFactory;
    private Journal journal;
    private boolean useJournal = true;
    private boolean useQuickJournal;
    private File journalArchiveDirectory;
    private boolean failIfJournalIsLocked;
    private int journalThreadPriority = Thread.MAX_PRIORITY;
    private JDBCPersistenceAdapter jdbcPersistenceAdapter = new JDBCPersistenceAdapter();
    private boolean useDedicatedTaskRunner;

    public PersistenceAdapter createPersistenceAdapter() throws IOException {
        jdbcPersistenceAdapter.setDataSource(getDataSource());

        if (!useJournal) {
            return jdbcPersistenceAdapter;
        }
        return new JournalPersistenceAdapter(getJournal(), jdbcPersistenceAdapter, getTaskRunnerFactory());

    }

    public int getJournalLogFiles() {
        return journalLogFiles;
    }

    /**
     * Sets the number of journal log files to use
     */
    public void setJournalLogFiles(int journalLogFiles) {
        this.journalLogFiles = journalLogFiles;
    }

    public int getJournalLogFileSize() {
        return journalLogFileSize;
    }

    /**
     * Sets the size of the journal log files
     * When set using Xbean, values of the form "20 Mb", "1024kb", and "1g" can be used
     * @org.apache.xbean.Property propertyEditor="org.apache.activemq.util.MemoryIntPropertyEditor"
     */
    public void setJournalLogFileSize(int journalLogFileSize) {
        this.journalLogFileSize = journalLogFileSize;
    }

    public JDBCPersistenceAdapter getJdbcAdapter() {
        return jdbcPersistenceAdapter;
    }

    public void setJdbcAdapter(JDBCPersistenceAdapter jdbcAdapter) {
        this.jdbcPersistenceAdapter = jdbcAdapter;
    }

    public boolean isUseJournal() {
        return useJournal;
    }

    /**
     * Enables or disables the use of the journal. The default is to use the
     * journal
     * 
     * @param useJournal
     */
    public void setUseJournal(boolean useJournal) {
        this.useJournal = useJournal;
    }

    public boolean isUseDedicatedTaskRunner() {
        return useDedicatedTaskRunner;
    }
    
    public void setUseDedicatedTaskRunner(boolean useDedicatedTaskRunner) {
        this.useDedicatedTaskRunner = useDedicatedTaskRunner;
    }
    
    public TaskRunnerFactory getTaskRunnerFactory() {
        if (taskRunnerFactory == null) {
            taskRunnerFactory = new TaskRunnerFactory("Persistence Adaptor Task", journalThreadPriority,
                                                      true, 1000, isUseDedicatedTaskRunner());
        }
        return taskRunnerFactory;
    }

    public void setTaskRunnerFactory(TaskRunnerFactory taskRunnerFactory) {
        this.taskRunnerFactory = taskRunnerFactory;
    }

    public Journal getJournal() throws IOException {
        if (journal == null) {
            createJournal();
        }
        return journal;
    }

    public void setJournal(Journal journal) {
        this.journal = journal;
    }

    public File getJournalArchiveDirectory() {
        if (journalArchiveDirectory == null && useQuickJournal) {
            journalArchiveDirectory = new File(getDataDirectoryFile(), "journal");
        }
        return journalArchiveDirectory;
    }

    public void setJournalArchiveDirectory(File journalArchiveDirectory) {
        this.journalArchiveDirectory = journalArchiveDirectory;
    }

    public boolean isUseQuickJournal() {
        return useQuickJournal;
    }

    /**
     * Enables or disables the use of quick journal, which keeps messages in the
     * journal and just stores a reference to the messages in JDBC. Defaults to
     * false so that messages actually reside long term in the JDBC database.
     */
    public void setUseQuickJournal(boolean useQuickJournal) {
        this.useQuickJournal = useQuickJournal;
    }

    public JDBCAdapter getAdapter() throws IOException {
        return jdbcPersistenceAdapter.getAdapter();
    }

    public void setAdapter(JDBCAdapter adapter) {
        jdbcPersistenceAdapter.setAdapter(adapter);
    }

    public Statements getStatements() {
        return jdbcPersistenceAdapter.getStatements();
    }

    public void setStatements(Statements statements) {
        jdbcPersistenceAdapter.setStatements(statements);
    }

    public boolean isUseDatabaseLock() {
        return jdbcPersistenceAdapter.isUseDatabaseLock();
    }

    /**
     * Sets whether or not an exclusive database lock should be used to enable
     * JDBC Master/Slave. Enabled by default.
     */
    public void setUseDatabaseLock(boolean useDatabaseLock) {
        jdbcPersistenceAdapter.setUseDatabaseLock(useDatabaseLock);
    }

    public boolean isCreateTablesOnStartup() {
        return jdbcPersistenceAdapter.isCreateTablesOnStartup();
    }

    /**
     * Sets whether or not tables are created on startup
     */
    public void setCreateTablesOnStartup(boolean createTablesOnStartup) {
        jdbcPersistenceAdapter.setCreateTablesOnStartup(createTablesOnStartup);
    }

    public int getJournalThreadPriority() {
        return journalThreadPriority;
    }

    /**
     * Sets the thread priority of the journal thread
     */
    public void setJournalThreadPriority(int journalThreadPriority) {
        this.journalThreadPriority = journalThreadPriority;
    }

    /**
     * @throws IOException
     */
    protected void createJournal() throws IOException {
        File journalDir = new File(getDataDirectoryFile(), "journal").getCanonicalFile();
        if (failIfJournalIsLocked) {
            journal = new JournalImpl(journalDir, journalLogFiles, journalLogFileSize,
                                      getJournalArchiveDirectory());
        } else {
            while (true) {
                try {
                    journal = new JournalImpl(journalDir, journalLogFiles, journalLogFileSize,
                                              getJournalArchiveDirectory());
                    break;
                } catch (JournalLockedException e) {
                    LOG.info("Journal is locked... waiting " + (JOURNAL_LOCKED_WAIT_DELAY / 1000)
                             + " seconds for the journal to be unlocked.");
                    try {
                        Thread.sleep(JOURNAL_LOCKED_WAIT_DELAY);
                    } catch (InterruptedException e1) {
                    }
                }
            }
        }
    }

}

Other ActiveMQ examples (source code examples)

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