org.apache.activemq.store.jdbc
Class DefaultDatabaseLocker

java.lang.Object
  org.apache.activemq.util.ServiceSupport
      org.apache.activemq.broker.AbstractLocker
          org.apache.activemq.store.jdbc.AbstractJDBCLocker
              org.apache.activemq.store.jdbc.DefaultDatabaseLocker

All Implemented Interfaces:

Locker, org.apache.activemq.Service

Direct Known Subclasses:

TransactDatabaseLocker

public class DefaultDatabaseLocker
extends AbstractJDBCLocker

Represents an exclusive lock on a database to avoid multiple brokers running against the same logical database.

Field Summary

protected Connection	connection
protected Handler<Exception>	exceptionHandler
protected PreparedStatement	lockCreateStatement
protected PreparedStatement	lockUpdateStatement

Fields inherited from class org.apache.activemq.store.jdbc.AbstractJDBCLocker

createTablesOnStartup, dataSource, queryTimeout, statements

Fields inherited from class org.apache.activemq.broker.AbstractLocker

DEFAULT_LOCK_ACQUIRE_SLEEP_INTERVAL, failIfLocked, lockable, lockAcquireSleepInterval, name

Constructor Summary

DefaultDatabaseLocker()

Method Summary

void	doStart()
void	doStop(ServiceStopper stopper)
Handler	getExceptionHandler()
long	getLockAcquireSleepInterval()
boolean	keepAlive()
void	setExceptionHandler(Handler exceptionHandler)
void	setLockAcquireSleepInterval(long lockAcquireSleepInterval)

Methods inherited from class org.apache.activemq.store.jdbc.AbstractJDBCLocker

close, close, configure, getConnection, getQueryTimeout, preStart, setCreateTablesOnStartup, setDataSource, setQueryTimeout, setQueryTimeout, setStatements

Methods inherited from class org.apache.activemq.broker.AbstractLocker

setFailIfLocked, setLockable, setName

Methods inherited from class org.apache.activemq.util.ServiceSupport

addServiceListener, dispose, isStarted, isStopped, isStopping, postStop, removeServiceListener, start, stop

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.activemq.Service

start, stop

Field Detail

lockCreateStatement

protected volatile PreparedStatement lockCreateStatement

lockUpdateStatement

protected volatile PreparedStatement lockUpdateStatement

connection

protected volatile Connection connection

exceptionHandler

protected Handler<Exception> exceptionHandler

Constructor Detail

DefaultDatabaseLocker

public DefaultDatabaseLocker()

Method Detail

doStart

public void doStart()
             throws Exception

Specified by:

doStart in class ServiceSupport

Throws:

Exception

doStop

public void doStop(ServiceStopper stopper)
            throws Exception

Specified by:

doStop in class ServiceSupport

Throws:

Exception

keepAlive

public boolean keepAlive()
                  throws IOException

Specified by:

keepAlive in interface Locker

Overrides:

keepAlive in class AbstractLocker

Throws:

IOException

getLockAcquireSleepInterval

public long getLockAcquireSleepInterval()

Overrides:

getLockAcquireSleepInterval in class AbstractLocker

setLockAcquireSleepInterval

public void setLockAcquireSleepInterval(long lockAcquireSleepInterval)

Specified by:

setLockAcquireSleepInterval in interface Locker

Overrides:

setLockAcquireSleepInterval in class AbstractLocker

getExceptionHandler

public Handler getExceptionHandler()

setExceptionHandler

public void setExceptionHandler(Handler exceptionHandler)