Package org.rrd4j.core

core RRD4J implementation.

See: Description

Interface Summary

Interface	Description
DataHolder	Interface for holding data sources.
Robin	Class to represent archive values for a single datasource.
RrdFileBackend	An abstract backend which is used to store RRD data to ordinary files on the disk.
RrdUpdater<T extends RrdUpdater<T>>	Interface for RRD components that can update their state.
XmlWriter.DoubleFormater	Functional interface for formatting double values in XML output.

Class Summary

Class	Description
ArcDef	Class to represent single archive definition within the RRD.
Archive	Class to represent single RRD archive in a RRD with its internal state.
ArcState	Class to represent internal RRD archive state for a single datasource.
ByteBufferBackend	A backend that store and provides access to data using a ByteBuffer, using java internal methods for long, integer and others types.
DataImporter	An abstract class to import data from external source.
Datasource	Class to represent single datasource within RRD.
DsDef	Class to represent single data source definition within the RRD.
FetchData	Class used to represent data fetched from the RRD.
FetchRequest	Class to represent fetch request.
Header	Class to represent RRD header.
RobinArray	Class to represent archive values for a single datasource.
RobinMatrix	Class to represent archive values for a single datasource.
RrdAllocator	An internal usage class.
RrdBackend	Base implementation class for all backend classes.
RrdBackendFactory	Base (abstract) backend factory class which holds references to all concrete backend factories and defines abstract methods which must be implemented in all concrete factory implementations.
RrdByteArrayBackend	Abstract byte array based backend.
RrdDb	Main class used to create and manipulate round robin databases (RRDs).
RrdDb.Builder	Builder for RrdDb instances.
RrdDbPool	This class should be used to synchronize access to RRD files in a multithreaded environment.
RrdDef	Class to represent definition of new Round Robin Database (RRD).
RrdDefTemplate	Class used to create an arbitrary number of RrdDef (RRD definition) objects from a single XML template.
RrdDouble<U extends RrdUpdater<U>>	RRD double primitive type.
RrdDoubleArray<U extends RrdUpdater<U>>	RRD primitive type for handling arrays of double values.
RrdDoubleMatrix<U extends RrdUpdater<U>>	RRD primitive type for handling matrices of double values.
RrdEnum<U extends RrdUpdater<U>,E extends Enum<E>>	RRD primitive type for handling enum values.
RrdFileBackendFactory	An abstract backend factory which is used to store RRD data to ordinary files on the disk.
RrdInt<U extends RrdUpdater<U>>	RRD integer primitive type.
RrdLong<U extends RrdUpdater<U>>	RRD primitive type for handling long integer values.
RrdMemoryBackend	Backend to be used to store all RRD bytes in memory.
RrdMemoryBackendFactory	Factory class which creates actual RrdMemoryBackend objects.
RrdNioBackend	Backend which is used to store RRD data to ordinary disk files using java.nio.* package.
RrdNioBackendFactory	Factory class which creates actual RrdNioBackend objects.
RrdPrimitive<U extends RrdUpdater<U>>	Abstract base class for all RRD primitive data types.
RrdRandomAccessFileBackend	Backend which is used to store RRD data to ordinary files on the disk.
RrdRandomAccessFileBackendFactory	Factory class which creates actual RrdRandomAccessFileBackend objects.
RrdSafeFileBackend	Backend which is used to store RRD data to ordinary files on the disk, using locking.
RrdSafeFileBackend.Counters	Internal counters for tracking file locking operations.
RrdSafeFileBackendFactory	Factory class which creates actual RrdSafeFileBackend objects.
RrdString<U extends RrdUpdater<U>>	RRD primitive type for handling string values.
RrdSyncThreadPool	Thread pool used by RrdNioBackend instances to periodically sync the mapped file to disk.
RrdSyncThreadPool.DaemonThreadFactory	Daemon thread factory used by the monitor executors.
RrdToolkit	Class used to perform various complex operations on RRD files.
RrdToolReader	Reader for RRDTool format RRD files.
Sample	Class to represent data source values for the given timestamp.
Util	Class defines various utility functions used in Rrd4j.
Util.Xml	Various DOM utility functions.
XmlReader	Reader for importing RRD data from XML format.
XmlTemplate	Class used as a base class for various XML template related classes.
XmlWriter	Extremely simple utility class used to create XML documents.

Exception Summary

Exception	Description
InvalidRrdException	An exception indicating a corrupted RRD.
RrdBackendException	Wrap a exception generated by the backend store
RrdException	A general purpose RRD4J exception.

Annotation Types Summary

Annotation Type	Description
RrdBackendAnnotation	Description of a RrdBackendFactory

Package org.rrd4j.core Description

core RRD4J implementation.