org.rrd4j.core
Class RrdFileBackendFactory

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

Direct Known Subclasses:

RrdNioBackendFactory, RrdRandomAccessFileBackendFactory

public abstract class RrdFileBackendFactory
extends RrdBackendFactory

An abstract backend factory which is used to store RRD data to ordinary files on the disk.

Every backend factory storing RRD data as ordinary files should inherit from it, some check are done in the code for instanceof.

Constructor Summary

RrdFileBackendFactory()

Method Summary

protected boolean	exists(String path) Method to determine if a file with the given path already exists.
protected boolean	shouldValidateHeader(String path) Determines if the header should be validated.

Methods inherited from class org.rrd4j.core.RrdBackendFactory

getDefaultFactory, getFactory, getName, open, registerAndSetAsDefaultFactory, registerFactory, setDefaultFactory

Methods inherited from class java.lang.Object

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

Constructor Detail

RrdFileBackendFactory

public RrdFileBackendFactory()

Method Detail

exists

protected boolean exists(String path)

Method to determine if a file with the given path already exists.

Specified by:

exists in class RrdBackendFactory

Parameters:

path - File path

Returns:

True, if such file exists, false otherwise.

shouldValidateHeader

protected boolean shouldValidateHeader(String path)
                                throws IOException

Description copied from class: RrdBackendFactory

Determines if the header should be validated.

Specified by:

shouldValidateHeader in class RrdBackendFactory

Parameters:

path - Storage path

Returns:

True, if the header should be validated for this factory

Throws:

IOException - if header validation fails