org.apache.jackrabbit.core.journal
Class MemoryJournal

java.lang.Object
  org.apache.jackrabbit.core.journal.AbstractJournal
      org.apache.jackrabbit.core.journal.MemoryJournal

All Implemented Interfaces:

Journal

public class MemoryJournal
extends AbstractJournal

Memory-based journal, useful for testing purposes only.

Nested Class Summary

class	MemoryJournal.MemoryRecord Memory record.
class	MemoryJournal.MemoryRecordIterator Record iterator implementation.

Constructor Summary

MemoryJournal()

Method Summary

protected void	append(AppendRecord record, InputStream in, int length) Append a record backed by a file.
void	close() Close this journal.
protected void	doLock() Lock the journal revision.
protected void	doUnlock(boolean successful) Unlock the journal revision.
InstanceRevision	getInstanceRevision() Gets the instance that manages the cluster node's local revision.
long	getReadDelay() Return the read delay in milliseconds.
RecordIterator	getRecords() Return an iterator over all available records in the journal.
RecordIterator	getRecords(long startRevision) Return an iterator over all records after the specified revision.
long	getWriteDelay() Return the write delay in milliseconds.
void	init(String id, NamespaceResolver resolver) Initialize journal.
void	setReadDelay(long readDelay) Set the read delay in milliseconds.
void	setRecords(List<MemoryJournal.MemoryRecord> records) Set records.
void	setWriteDelay(long writeDelay) Set the write delay in milliseconds.

Methods inherited from class org.apache.jackrabbit.core.journal.AbstractJournal

appending, createProducer, doSync, getConsumer, getId, getNamePathResolver, getProducer, getRepositoryHome, getResolver, getRevision, lockAndSync, register, setRepositoryHome, setRevision, sync, unlock, unregister

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryJournal

public MemoryJournal()

Method Detail

getInstanceRevision

public InstanceRevision getInstanceRevision()
                                     throws JournalException

Gets the instance that manages the cluster node's local revision.

Returns:

the InstanceRevision manager

Throws:

JournalException - on error

init

public void init(String id,
                 NamespaceResolver resolver)
          throws JournalException

Initialize journal.

Specified by:

init in interface Journal

Overrides:

init in class AbstractJournal

Parameters:

id - id this journal should use to write its own records

resolver - resolver used when reading/writing records

Throws:

JournalException - if an error occurs

doLock

protected void doLock()
               throws JournalException

Lock the journal revision. Subclass responsibility.

Specified by:

doLock in class AbstractJournal

Throws:

JournalException - if an error occurs

append

protected void append(AppendRecord record,
                      InputStream in,
                      int length)
               throws JournalException

Append a record backed by a file. On exit, the new revision must have been set inside the appended record. Subclass responsibility.

Specified by:

append in class AbstractJournal

Parameters:

record - record to append

in - input stream

length - number of bytes in input stream

Throws:

JournalException - if an error occurs

doUnlock

protected void doUnlock(boolean successful)

Unlock the journal revision. Subclass responsibility.

Specified by:

doUnlock in class AbstractJournal

Parameters:

successful - flag indicating whether the update process was successful

getRecords

public RecordIterator getRecords(long startRevision)
                          throws JournalException

Return an iterator over all records after the specified revision.

Parameters:

startRevision - start point (exlusive)

Returns:

an iterator over all records after the specified revision.

Throws:

JournalException - if an error occurs

getRecords

public RecordIterator getRecords()
                          throws JournalException

Return an iterator over all available records in the journal.

Returns:

an iterator over all records.

Throws:

JournalException - if an error occurs

setRecords

public void setRecords(List<MemoryJournal.MemoryRecord> records)

Set records. Used to share records between two journal implementations.

Parameters:

records - array list that should back up this memory journal

getReadDelay

public long getReadDelay()

Return the read delay in milliseconds.

Returns:

read delay

setReadDelay

public void setReadDelay(long readDelay)

Set the read delay in milliseconds.

Parameters:

readDelay - read delay

getWriteDelay

public long getWriteDelay()

Return the write delay in milliseconds.

Returns:

write delay

setWriteDelay

public void setWriteDelay(long writeDelay)

Set the write delay in milliseconds.

Parameters:

writeDelay - write delay

close

public void close()

Close this journal. This should release any resources still held by this journal.