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.DefaultDatabaseLocker

All Implemented Interfaces:

Locker, Service

Direct Known Subclasses:

TransactDatabaseLocker

public class DefaultDatabaseLocker
extends AbstractLocker

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

Field Summary

protected java.sql.Connection	connection
protected javax.sql.DataSource	dataSource
protected Handler<java.lang.Exception>	exceptionHandler
protected java.sql.PreparedStatement	lockCreateStatement
protected java.sql.PreparedStatement	lockUpdateStatement
protected int	queryTimeout
protected Statements	statements
protected boolean	stopping

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

DEFAULT_LOCK_ACQUIRE_SLEEP_INTERVAL, failIfLocked, lockAcquireSleepInterval, name

Constructor Summary

DefaultDatabaseLocker()

Method Summary

void	configure(PersistenceAdapter adapter)
void	doStart()
void	doStop(ServiceStopper stopper)
Handler	getExceptionHandler()
long	getLockAcquireSleepInterval()
int	getQueryTimeout()
boolean	keepAlive()
void	setExceptionHandler(Handler exceptionHandler)
void	setLockAcquireSleepInterval(long lockAcquireSleepInterval)
void	setQueryTimeout(int queryTimeout)

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

setFailIfLocked, setName

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

addServiceListener, dispose, isStarted, isStopped, isStopping, postStop, preStart, 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

dataSource

protected javax.sql.DataSource dataSource

statements

protected Statements statements

lockCreateStatement

protected volatile java.sql.PreparedStatement lockCreateStatement

lockUpdateStatement

protected volatile java.sql.PreparedStatement lockUpdateStatement

connection

protected volatile java.sql.Connection connection

stopping

protected volatile boolean stopping

exceptionHandler

protected Handler<java.lang.Exception> exceptionHandler

queryTimeout

protected int queryTimeout

Constructor Detail

DefaultDatabaseLocker

public DefaultDatabaseLocker()

Method Detail

configure

public void configure(PersistenceAdapter adapter)
               throws java.io.IOException

Throws:

java.io.IOException

doStart

public void doStart()
             throws java.lang.Exception

Specified by:

doStart in class ServiceSupport

Throws:

java.lang.Exception

doStop

public void doStop(ServiceStopper stopper)
            throws java.lang.Exception

Specified by:

doStop in class ServiceSupport

Throws:

java.lang.Exception

keepAlive

public boolean keepAlive()
                  throws java.io.IOException

Specified by:

keepAlive in interface Locker

Overrides:

keepAlive in class AbstractLocker

Throws:

java.io.IOException

getLockAcquireSleepInterval

public long getLockAcquireSleepInterval()

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)

getQueryTimeout

public int getQueryTimeout()

setQueryTimeout

public void setQueryTimeout(int queryTimeout)