org.rrd4j.core
Class RrdNioBackendFactory

java.lang.Object
  org.rrd4j.core.RrdBackendFactory
      org.rrd4j.core.RrdFileBackendFactory
          org.rrd4j.core.RrdNioBackendFactory

public class RrdNioBackendFactory
extends RrdFileBackendFactory

Factory class which creates actual RrdNioBackend objects. This is the default factory since 1.4.0 version

Field Summary

static int	DEFAULT_SYNC_CORE_POOL_SIZE The core pool size for the sync executor.
static int	DEFAULT_SYNC_PERIOD Period in seconds between consecutive synchronizations when sync-mode is set to SYNC_BACKGROUND.

Constructor Summary

RrdNioBackendFactory()

Method Summary

String	getName() Returns the name (primary ID) for the factory.
static int	getSyncPeriod() Returns time between two consecutive background synchronizations.
protected RrdBackend	open(String path, boolean readOnly) Creates RrdNioBackend object for the given file path.
static void	setSyncPeriod(int syncPeriod) Sets time between consecutive background synchronizations.

Methods inherited from class org.rrd4j.core.RrdFileBackendFactory

exists, shouldValidateHeader

Methods inherited from class org.rrd4j.core.RrdBackendFactory

getDefaultFactory, getFactory, registerAndSetAsDefaultFactory, registerFactory, setDefaultFactory

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_SYNC_PERIOD

public static final int DEFAULT_SYNC_PERIOD

Period in seconds between consecutive synchronizations when sync-mode is set to SYNC_BACKGROUND. By default in-memory cache will be transferred to the disc every 300 seconds (5 minutes). Default value can be changed via setSyncPeriod(int) method.

See Also:

Constant Field Values

DEFAULT_SYNC_CORE_POOL_SIZE

public static final int DEFAULT_SYNC_CORE_POOL_SIZE

The core pool size for the sync executor. Defaults to 6.

See Also:

Constant Field Values

Constructor Detail

RrdNioBackendFactory

public RrdNioBackendFactory()

Method Detail

getSyncPeriod

public static int getSyncPeriod()

Returns time between two consecutive background synchronizations. If not changed via setSyncPeriod(int) method call, defaults to DEFAULT_SYNC_PERIOD. See setSyncPeriod(int) for more information.

Returns:

Time in seconds between consecutive background synchronizations.

setSyncPeriod

public static void setSyncPeriod(int syncPeriod)

Sets time between consecutive background synchronizations.

Parameters:

syncPeriod - Time in seconds between consecutive background synchronizations.

open

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

Creates RrdNioBackend object for the given file path.

Specified by:

open in class RrdBackendFactory

Parameters:

path - File path

readOnly - True, if the file should be accessed in read/only mode. False otherwise.

Returns:

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

Throws:

IOException - Thrown in case of I/O error.

getName

public String getName()

Description copied from class: RrdBackendFactory

Returns the name (primary ID) for the factory.

Specified by:

getName in class RrdBackendFactory

Returns:

Name of the factory.