Package org.jrobin.core

Class RrdSafeFileBackendFactory

java.lang.Object

org.jrobin.core.RrdBackendFactory

org.jrobin.core.RrdFileBackendFactory

org.jrobin.core.RrdSafeFileBackendFactory

public class RrdSafeFileBackendFactory
extends RrdFileBackendFactory

Factory class which creates actual RrdSafeFileBackend objects.

Field Summary

Fields

Modifier and Type	Field	Description
static long	LOCK_RETRY_PERIOD	Default time between two consecutive file locking attempts.
static long	LOCK_WAIT_TIME	Default time (in milliseconds) this backend will wait for a file lock.
static String	NAME	factory name, "SAFE"

Constructor Summary

Constructors

Constructor	Description
RrdSafeFileBackendFactory()

Method Summary

Modifier and Type	Method	Description
String	getFactoryName()	Returns the name of this factory.
static long	getLockRetryPeriod()	Returns time between two consecutive file locking attempts.
static long	getLockWaitTime()	Returns time this backend will wait for a file lock.
protected RrdBackend	open(String path, boolean readOnly)	Creates RrdSafeFileBackend object for the given file path.
static void	setLockRetryPeriod(long lockRetryPeriod)	Sets time between two consecutive file locking attempts.
static void	setLockWaitTime(long lockWaitTime)	Sets time this backend will wait for a file lock.

Methods inherited from class org.jrobin.core.RrdFileBackendFactory

exists

Methods inherited from class org.jrobin.core.RrdBackendFactory

getDefaultFactory, getFactory, isInstanceCreated, registerAndSetAsDefaultFactory, registerFactory, setDefaultFactory, toString

Methods inherited from class java.lang.Object

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

Field Detail

LOCK_WAIT_TIME

public static final long LOCK_WAIT_TIME

Default time (in milliseconds) this backend will wait for a file lock.

See Also:

Constant Field Values

LOCK_RETRY_PERIOD

public static final long LOCK_RETRY_PERIOD

Default time between two consecutive file locking attempts.

See Also:

Constant Field Values

NAME

public static final String NAME

factory name, "SAFE"

See Also:

Constant Field Values

Constructor Detail

RrdSafeFileBackendFactory

public RrdSafeFileBackendFactory()

Method Detail

open

protected RrdBackend open(String path,
                          boolean readOnly)
                   throws IOException

Creates RrdSafeFileBackend object for the given file path.

Overrides:

open in class RrdFileBackendFactory

Parameters:

path - File path

readOnly - This parameter is ignored

Returns:

RrdSafeFileBackend object which handles all I/O operations for the given file path

Throws:

IOException - Thrown in case of I/O error.

getFactoryName

public String getFactoryName()

Returns the name of this factory.

Overrides:

getFactoryName in class RrdFileBackendFactory

Returns:

Factory name (equals to string "SAFE")

getLockWaitTime

public static long getLockWaitTime()

Returns time this backend will wait for a file lock.

Returns:

Time (in milliseconds) this backend will wait for a file lock.

setLockWaitTime

public static void setLockWaitTime(long lockWaitTime)

Sets time this backend will wait for a file lock.

Parameters:

lockWaitTime - Maximum lock wait time (in milliseconds)

getLockRetryPeriod

public static long getLockRetryPeriod()

Returns time between two consecutive file locking attempts.

Returns:

Time (im milliseconds) between two consecutive file locking attempts.

setLockRetryPeriod

public static void setLockRetryPeriod(long lockRetryPeriod)

Sets time between two consecutive file locking attempts.

Parameters:

lockRetryPeriod - time (in milliseconds) between two consecutive file locking attempts.