[jboss-cvs] JBoss Messaging SVN: r6720 - trunk/tests/src/org/jboss/messaging/tests/util.

[jboss-cvs-commits at lists.jboss.org]

Author: clebert.suconic at jboss.com
Date: 2009-05-08 17:52:21 -0400 (Fri, 08 May 2009)
New Revision: 6720

Added:
   trunk/tests/src/org/jboss/messaging/tests/util/JournalExample.java
Log:
Journal Example

Added: trunk/tests/src/org/jboss/messaging/tests/util/JournalExample.java
===================================================================
--- trunk/tests/src/org/jboss/messaging/tests/util/JournalExample.java	                        (rev 0)
+++ trunk/tests/src/org/jboss/messaging/tests/util/JournalExample.java	2009-05-08 21:52:21 UTC (rev 6720)
@@ -0,0 +1,110 @@
+package org.jboss.messaging.tests.util;
+import java.util.ArrayList;
+
+import org.jboss.messaging.core.journal.PreparedTransactionInfo;
+import org.jboss.messaging.core.journal.RecordInfo;
+import org.jboss.messaging.core.journal.SequentialFileFactory;
+import org.jboss.messaging.core.journal.impl.AIOSequentialFileFactory;
+import org.jboss.messaging.core.journal.impl.JournalImpl;
+
+/*
+ * JBoss, Home of Professional Open Source
+ * Copyright 2005-2009, Red Hat Middleware LLC, and individual contributors
+ * by the @authors tag. See the copyright.txt in the distribution for a
+ * full listing of individual contributors.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
+
+/**
+ * A JournalExample: Just an example on how to use the Journal Directly
+ *
+ * @author <a href="mailto:clebert.suconic at jboss.org">Clebert Suconic</a>
+ *
+ *
+ */
+public class JournalExample
+{
+
+   // Constants -----------------------------------------------------
+
+   // Attributes ----------------------------------------------------
+
+   // Static --------------------------------------------------------
+
+   // Constructors --------------------------------------------------
+
+   // Public --------------------------------------------------------
+
+   // Package protected ---------------------------------------------
+
+   // Protected -----------------------------------------------------
+
+   // Private -------------------------------------------------------
+
+   // Inner classes -------------------------------------------------
+
+   
+   public static void main(String arg[])
+   {
+      try
+      {
+         SequentialFileFactory fileFactory = new AIOSequentialFileFactory("/tmp"); // any dir you want
+         //SequentialFileFactory fileFactory = new NIOSequentialFileFactory("/tmp"); // any dir you want
+         JournalImpl journalExample = new JournalImpl(
+                                                      10 * 1024 * 1024, // 10M.. we believe that's the usual cilinder size.. not an exact science here
+                                                      10, // number of files pre-allocated
+                                                      true, // sync on commit
+                                                      false, // no sync on non transactional
+                                                      fileFactory, // AIO or NIO
+                                                      "exjournal", // file name
+                                                      "dat", // extension
+                                                       10000, // it's like a semaphore for callback on the AIO layer
+                                                      5 * 1024); // avg buffer size.. it will reuse any buffer smaller than this during record writes
+         
+         ArrayList<RecordInfo> committedRecords = new ArrayList<RecordInfo>();
+         ArrayList<PreparedTransactionInfo> preparedTransactions = new ArrayList<PreparedTransactionInfo>();
+         journalExample.start();
+         System.out.println("Loading records and creating data files");
+         journalExample.load(committedRecords, preparedTransactions);
+
+         System.out.println("Loaded Record List:");
+         
+         for (RecordInfo record: committedRecords)
+         {
+            System.out.println("Record id = " + record.id + " userType = " + record.userRecordType + " is stored.. keep it on the memory somewhere until you delete it");
+         }
+
+         System.out.println("Adding Records:");
+         
+         journalExample.appendAddRecord(System.currentTimeMillis(), (byte)1, new byte[] { 0, 1, 2} );
+         
+         long tx = System.currentTimeMillis() + 1; // some id generation system
+         journalExample.appendAddRecordTransactional(tx, System.currentTimeMillis() + 2, (byte)2, new byte[] { 0, 1, 2});
+         
+         journalExample.appendCommitRecord(tx);
+
+         System.out.println("Done!");
+         
+         journalExample.stop();
+      }
+      catch (Exception e)
+      {
+         e.printStackTrace();
+      }
+   }
+   
+}