Examples of JournalImpl

org.activeio.journal.active.JournalImpl
objectweb.org/">Howl project but tailored to the needs of ActiveMQ.
This Journal provides the following features:
- Conncurrent writes are batched into a single write/force done by a background thread.
- Uses preallocated logs to avoid disk fragmentation and performance degregation.
- The number and size of the preallocated logs are configurable.
- Uses direct ByteBuffers to write data to log files.
- Allows logs to grow in case of an overflow condition so that overflow exceptions are not not thrown. Grown logs that are inactivated (due to a new mark) are resized to thier original size.
- No limit on the size of the record written to the journal
- Should be possible to extend so that multiple physical disk are used concurrently to increase throughput and decrease latency.
@version $Revision: 1.1 $
org.apache.activeio.journal.active.JournalImpl
objectweb.org/">Howl project but tailored to the needs of ActiveMQ.
This Journal provides the following features:
- Concurrent writes are batched into a single write/force done by a background thread.
- Uses preallocated logs to avoid disk fragmentation and performance degregation.
- The number and size of the preallocated logs are configurable.
- Uses direct ByteBuffers to write data to log files.
- Allows logs to grow in case of an overflow condition so that overflow exceptions are not not thrown. Grown logs that are inactivate (due to a new mark) are resized to their original size.
- No limit on the size of the record written to the journal
- Should be possible to extend so that multiple physical disk are used concurrently to increase throughput and decrease latency.
@version $Revision: 1.1 $
org.codehaus.activemq.journal.impl.JournalImpl
objectweb.org/">Howl project but tailored to the needs of ActiveMQ.
This Journal provides the following features:
- Conncurrent writes are batched into a single write/force done by a background thread.
- Uses preallocated logs to avoid disk fragmentation and performance degregation.
- The number and size of the preallocated logs are configurable.
- Uses direct ByteBuffers to write data to log files.
- Allows logs to grow in case of an overflow condition so that overflow exceptions are not not thrown. Grown logs that are inactivated (due to a new mark) are resized to thier original size.
- No limit on the size of the record written to the journal
- Should be possible to extend so that multiple physical disk are used concurrently to increase throughput and decrease latency.
This class is a thing wrapper around a LogFileManager. It may be possible to extends this class so that it manages multiple LogFileManager objects to allow logging to multiple physical disks. @version $Revision: 1.3 $
org.hornetq.core.journal.impl.JournalImpl

A circular log implementation.
Look at {@link JournalImpl#load(LoaderCallback)} for the file layout @author Tim Fox @author Clebert Suconic

Examples of org.hornetq.core.journal.impl.JournalImpl


      journalDir = config.getJournalDirectory();


      SequentialFileFactory bindingsFF = new NIOSequentialFileFactory(bindingsDir);


      Journal localBindings = new JournalImpl(1024 * 1024,
                                              2,
                                              config.getJournalCompactMinFiles(),
                                              config.getJournalCompactPercentage(),
                                              bindingsFF,
                                              "hornetq-bindings",
                                              "bindings",
                                              1);


      if (replicator != null)
      {
         bindingsJournal = new ReplicatedJournal((byte)0, localBindings, replicator);
      }
      else
      {
         bindingsJournal = localBindings;
      }


      if (journalDir == null)
      {
         throw new NullPointerException("journal-dir is null");
      }


      createJournalDir = config.isCreateJournalDir();


      syncNonTransactional = config.isJournalSyncNonTransactional();


      syncTransactional = config.isJournalSyncTransactional();


      SequentialFileFactory journalFF = null;


      if (config.getJournalType() == JournalType.ASYNCIO)
      {
         JournalStorageManager.log.info("Using AIO Journal");


         journalFF = new AIOSequentialFileFactory(journalDir,
                                                  config.getJournalBufferSize_AIO(),
                                                  config.getJournalBufferTimeout_AIO(),
                                                  config.isLogJournalWriteRate());
      }
      else if (config.getJournalType() == JournalType.NIO)
      {
         JournalStorageManager.log.info("Using NIO Journal");
         journalFF = new NIOSequentialFileFactory(journalDir,
                                                  true,
                                                  config.getJournalBufferSize_NIO(),
                                                  config.getJournalBufferTimeout_NIO(),
                                                  config.isLogJournalWriteRate());
      }
      else
      {
         throw new IllegalArgumentException("Unsupported journal type " + config.getJournalType());
      }


      if (config.isBackup() && !config.isSharedStore())
      {
         idGenerator = null;
      }
      else
      {
         idGenerator = new BatchingIDGenerator(0, JournalStorageManager.CHECKPOINT_BATCH_SIZE, bindingsJournal);
      }
      Journal localMessage = new JournalImpl(config.getJournalFileSize(),
                                             config.getJournalMinFiles(),
                                             config.getJournalCompactMinFiles(),
                                             config.getJournalCompactPercentage(),
                                             journalFF,
                                             "hornetq-data",

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Examples of org.hornetq.core.journal.impl.JournalImpl

   public static void describeBindingJournal(final String bindingsDir) throws Exception
   {


      SequentialFileFactory bindingsFF = new NIOSequentialFileFactory(bindingsDir);


      JournalImpl bindings = new JournalImpl(1024 * 1024, 2, -1, 0, bindingsFF, "hornetq-bindings", "bindings", 1);


      describeJournal(bindingsFF, bindings);
   }

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Examples of org.hornetq.core.journal.impl.JournalImpl

      SequentialFileFactory messagesFF = new NIOSequentialFileFactory(messagesDir);


      // Will use only default values. The load function should adapt to anything different
      ConfigurationImpl defaultValues = new ConfigurationImpl();


      JournalImpl messagesJournal = new JournalImpl(defaultValues.getJournalFileSize(),
                                                    defaultValues.getJournalMinFiles(),
                                                    0,
                                                    0,
                                                    messagesFF,
                                                    "hornetq-data",

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