org.apache.activemq.store.kahadb.disk.journal

Class ReadOnlyJournal

java.lang.Object

org.apache.activemq.store.kahadb.disk.journal.Journal

org.apache.activemq.store.kahadb.disk.journal.ReadOnlyJournal

public class ReadOnlyJournal
extends Journal

An AsyncDataManager that works in read only mode against multiple data directories. Useful for reading back archived data files.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.activemq.store.kahadb.disk.journal.Journal

Journal.DataFileRemovedListener, Journal.PreallocationScope, Journal.PreallocationStrategy, Journal.WriteCommand, Journal.WriteKey

Field Summary

Fields inherited from class org.apache.activemq.store.kahadb.disk.journal.Journal

accessorPool, appender, archiveDataLogs, BATCH_CONTROL_RECORD_HEADER, BATCH_CONTROL_RECORD_MAGIC, BATCH_CONTROL_RECORD_SIZE, BATCH_CONTROL_RECORD_TYPE, CALLER_BUFFER_APPENDER, callerBufferAppender, checkForCorruptionOnStartup, checksum, cleanupTask, dataFiles, DEFAULT_ARCHIVE_DIRECTORY, DEFAULT_CLEANUP_INTERVAL, DEFAULT_DIRECTORY, DEFAULT_FILE_PREFIX, DEFAULT_FILE_SUFFIX, DEFAULT_MAX_FILE_LENGTH, DEFAULT_MAX_WRITE_BATCH_SIZE, directory, directoryArchive, enableAsyncDiskSync, fileByFileMap, fileMap, filePrefix, fileSuffix, inflightWrites, lastAppendLocation, maxFileLength, preallocationScope, preallocationStrategy, PREFERED_DIFF, RECORD_HEAD_SPACE, started, totalLength, USER_RECORD_TYPE, writeBatchSize

Constructor Summary

Constructors

Constructor and Description
ReadOnlyJournal(java.util.ArrayList<java.io.File> dirs)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
boolean	delete()
Location	getFirstLocation()
void	start()

Methods inherited from class org.apache.activemq.store.kahadb.disk.journal.Journal

checkBatchRecord, cleanup, corruptRecoveryLocation, getCurrentDataFileId, getDirectory, getDirectoryArchive, getDiskSize, getFile, getFileMap, getFilePrefix, getFiles, getFileSuffix, getInflightWrites, getLastAppendLocation, getMaxFileLength, getNextLocation, getPreallocationScope, getPreallocationStrategy, getReplicationTarget, getWriteBatchSize, isArchiveDataLogs, isCheckForCorruptionOnStartup, isChecksum, isEnableAsyncDiskSync, length, preallocateEntireJournalDataFile, read, recoveryCheck, removeDataFiles, setArchiveDataLogs, setCheckForCorruptionOnStartup, setChecksum, setDirectory, setDirectoryArchive, setEnableAsyncDiskSync, setFilePrefix, setFileSuffix, setLastAppendLocation, setMaxFileLength, setPreallocationScope, setPreallocationStrategy, setReplicationTarget, setSizeAccumulator, setWriteBatchSize, toString, update, write, write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ReadOnlyJournal

public ReadOnlyJournal(java.util.ArrayList<java.io.File> dirs)

Method Detail

start

public void start()
           throws java.io.IOException

Overrides:

start in class Journal

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Overrides:

close in class Journal

Throws:

java.io.IOException

getFirstLocation

public Location getFirstLocation()
                          throws java.lang.IllegalStateException,
                                 java.io.IOException

Throws:

java.lang.IllegalStateException

java.io.IOException

delete

public boolean delete()
               throws java.io.IOException

Overrides:

delete in class Journal

Throws:

java.io.IOException