Package tigase.db.util.locker

Class ConnectionLock

java.lang.Object

tigase.db.util.locker.ConnectionLock

public abstract class ConnectionLock
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	isLocked
protected java.lang.String	jdbcConnection
protected int	lockAttemptDelay
protected int	lockAttemptsLimit

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ConnectionLock(java.lang.String db_conn)

Method Summary

Modifier and Type	Method	Description
void	cleanup()
protected boolean	executeQuery(java.sql.Connection connection, java.lang.String query)
static java.util.Optional<ConnectionLock>	getConnectionLocker(java.lang.String db_conn)
boolean	isLocked()
boolean	lock()
protected abstract boolean	lockDatabase(java.sql.Connection connection)
protected void	release(java.sql.Statement statement, java.sql.ResultSet resultSet)
boolean	unlock()
protected abstract boolean	unlockDatabase(java.sql.Connection connection)

Methods inherited from class java.lang.Object

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

Field Detail

isLocked

protected boolean isLocked

jdbcConnection

protected java.lang.String jdbcConnection

lockAttemptDelay

protected int lockAttemptDelay

lockAttemptsLimit

protected int lockAttemptsLimit

Constructor Detail

ConnectionLock

protected ConnectionLock(java.lang.String db_conn)

Method Detail

getConnectionLocker

public static java.util.Optional<ConnectionLock> getConnectionLocker(java.lang.String db_conn)
                                                              throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

lock

public boolean lock()

unlock

public boolean unlock()

cleanup

public void cleanup()

isLocked

public boolean isLocked()

lockDatabase

protected abstract boolean lockDatabase(java.sql.Connection connection)

Parameters:

connection - Connection which should hold the lock

Returns:

true if the locking was successful or false if it wasn't

release

protected void release(java.sql.Statement statement,
                       java.sql.ResultSet resultSet)

unlockDatabase

protected abstract boolean unlockDatabase(java.sql.Connection connection)

Parameters:

connection - Connection which holds the lock and which should be unlocked

Returns:

true if the unlocking was successful or false if it wasn't and the lock is still hold

executeQuery

protected boolean executeQuery(java.sql.Connection connection,
                               java.lang.String query)