Package org.rrd4j.core

Class RrdFileBackendFactory

java.lang.Object

org.rrd4j.core.RrdBackendFactory

org.rrd4j.core.RrdFileBackendFactory

All Implemented Interfaces:

Closeable, AutoCloseable

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.

Field Summary

Fields inherited from class org.rrd4j.core.RrdBackendFactory

cachingAllowed, DEFAULTFACTORY, name, scheme, validateHeader

Constructor Summary

Constructors

Constructor	Description
RrdFileBackendFactory()

Method Summary

Modifier and Type	Method	Description
boolean	canStore(URI uri)
protected boolean	exists(String path)	Determines if a storage with the given path already exists.
URI	getCanonicalUri(URI uri)	Ensure that an URI is returned in a non-ambiguous way.
String	getPath(URI uri)	Extract the local path from an URI.
URI	getUri(String path)	Transform an path in a valid URI for this backend.

Methods inherited from class org.rrd4j.core.RrdBackendFactory

addActiveFactories, addFactories, buildGenericUri, checkClosing, close, exists, findFactory, getActiveFactories, getBackend, getBackend, getDefaultFactory, getFactory, getName, getRootUri, getScheme, open, registerAndSetAsDefaultFactory, registerFactory, resolve, setActiveFactories, setDefaultFactory, shouldValidateHeader, shouldValidateHeader

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)

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

Specified by:

exists in class RrdBackendFactory

Parameters:

path - Storage path

Returns:

a boolean.

canStore

public boolean canStore(URI uri)

Overrides:

canStore in class RrdBackendFactory

getCanonicalUri

public URI getCanonicalUri(URI uri)

Description copied from class: RrdBackendFactory

Ensure that an URI is returned in a non-ambiguous way.

Overrides:

getCanonicalUri in class RrdBackendFactory

Parameters:

uri - a valid URI for this backend.

Returns:

the canonized URI.

getUri

public URI getUri(String path)

Description copied from class: RrdBackendFactory

Transform an path in a valid URI for this backend.

Overrides:

getUri in class RrdBackendFactory

Parameters:

path - a path local to the current backend.

Returns:

an URI that the current backend can handle.

getPath

public String getPath(URI uri)

Description copied from class: RrdBackendFactory

Extract the local path from an URI.

Overrides:

getPath in class RrdBackendFactory

Parameters:

uri - The URI to parse.

Returns:

the local path from the URI.