org.jboss.dna.repository
Class DnaEngine

java.lang.Object
  org.jboss.dna.repository.DnaEngine

Direct Known Subclasses:

JcrEngine

@Immutable
public class DnaEngine
extends Object

A single instance of the DNA services, which is obtained after setting up the configuration.

See Also:

DnaConfiguration

Field Summary

static String

CONFIGURATION_REPOSITORY_NAME

Method Summary

boolean	awaitTermination(long timeout, TimeUnit unit) Blocks until the shutdown has completed, or the timeout occurs, or the current thread is interrupted, whichever happens first.
ExecutionContext	getExecutionContext() Get the context in which this engine is executing.
Graph	getGraph(ExecutionContext context, String sourceName) Get a graph to the underlying source, using the supplied context.
Graph	getGraph(String sourceName) Get a graph to the underlying source.
Problems	getProblems() Get the problems that were encountered when setting up this engine from the configuration.
RepositoryConnectionFactory	getRepositoryConnectionFactory() Get a factory of connections, backed by the RepositorySor
RepositoryService	getRepositoryService() Get the repository service.
RepositorySource	getRepositorySource(String repositoryName) Get the RepositorySource instance used by this engine.
SequencingService	getSequencingService() Get the sequencing service.
void	shutdown() Shutdown this engine to close all connections, terminate any ongoing background operations (such as sequencing), and reclaim any resources that were acquired by this engine.
void	start() Start this engine to make it available for use.

Methods inherited from class java.lang.Object

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

Field Detail

CONFIGURATION_REPOSITORY_NAME

public static final String CONFIGURATION_REPOSITORY_NAME

See Also:

Constant Field Values

Method Detail

getProblems

public Problems getProblems()

Get the problems that were encountered when setting up this engine from the configuration.

Returns:

the problems, which may be empty but will never be null

getExecutionContext

public final ExecutionContext getExecutionContext()

Get the context in which this engine is executing.

Returns:

the execution context; never null

getRepositorySource

public final RepositorySource getRepositorySource(String repositoryName)

Get the RepositorySource instance used by this engine.

Parameters:

repositoryName - the name of the repository source

Returns:

the source, or null if no source with the given name exists

Throws:

IllegalStateException - if this engine was not started

getRepositoryConnectionFactory

public final RepositoryConnectionFactory getRepositoryConnectionFactory()

Get a factory of connections, backed by the RepositorySor

Returns:

the connection factory; never null

Throws:

IllegalStateException - if this engine was not started

getRepositoryService

public final RepositoryService getRepositoryService()

Get the repository service.

Returns:

the repository service owned by this engine; never null

Throws:

IllegalStateException - if this engine was not started

getGraph

public final Graph getGraph(String sourceName)

Get a graph to the underlying source.

Parameters:

sourceName - the name of the source

Returns:

the graph

Throws:

IllegalArgumentException - if the source name is null

RepositorySourceException - if a source with the supplied name does not exist

IllegalStateException - if this engine was not started

getGraph

public final Graph getGraph(ExecutionContext context,
                            String sourceName)

Get a graph to the underlying source, using the supplied context. Note that the supplied context should be a derivative of the engine's context.

Parameters:

context - the context of execution for this graph; may not be null

sourceName - the name of the source

Returns:

the graph

Throws:

IllegalArgumentException - if the context or source name are null

RepositorySourceException - if a source with the supplied name does not exist

IllegalStateException - if this engine was not started

getSequencingService

public final SequencingService getSequencingService()

Get the sequencing service.

Returns:

the sequencing service owned by this engine; never null

Throws:

IllegalStateException - if this engine was not started

start

public void start()

Start this engine to make it available for use.

Throws:

IllegalStateException - if this method is called when already shut down.

See Also:

shutdown()

shutdown

public void shutdown()

Shutdown this engine to close all connections, terminate any ongoing background operations (such as sequencing), and reclaim any resources that were acquired by this engine. This method may be called multiple times, but only the first time has an effect.

See Also:

start()

awaitTermination

public boolean awaitTermination(long timeout,
                                TimeUnit unit)
                         throws InterruptedException

Blocks until the shutdown has completed, or the timeout occurs, or the current thread is interrupted, whichever happens first.

Parameters:

timeout - the maximum time to wait for each component in this engine

unit - the time unit of the timeout argument

Returns:

true if this service complete shut down and false if the timeout elapsed before it was shut down completely

Throws:

InterruptedException - if interrupted while waiting