org.opentripplanner.updater

Class GraphUpdaterManager

java.lang.Object

org.opentripplanner.updater.GraphUpdaterManager

public class GraphUpdaterManager
extends Object

This class is attached to the graph:

 GraphUpdaterManager updaterManager = graph.getUpdaterManager();
 

Each updater will run in its own thread. When changes to the graph have to be made by these updaters, this should be done via the execute method of this manager to prevent race conditions between graph write operations.

Constructor Summary

Constructors

Constructor and Description
GraphUpdaterManager(Graph graph) Constructor

Method Summary

Modifier and Type	Method and Description
void	addUpdater(GraphUpdater updater) Adds an updater to the manager and runs it immediately in its own thread.
void	execute(GraphWriterRunnable runnable) This is the method to use to modify the graph from the updaters.
void	executeBlocking(GraphWriterRunnable runnable) This is another method to use to modify the graph from the updaters.
GraphUpdater	getUpdater(int id) Just an example of fetching status information from the graph updater manager to expose it in a web service.
Map<Integer,String>	getUpdaterDescriptions() Just an example of fetching status information from the graph updater manager to expose it in a web service.
int	size()
void	stop()

Methods inherited from class java.lang.Object

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

Constructor Detail

GraphUpdaterManager

public GraphUpdaterManager(Graph graph)

Constructor

Parameters:

graph - is parent graph of manager

Method Detail

stop

public void stop()

addUpdater

public void addUpdater(GraphUpdater updater)

Adds an updater to the manager and runs it immediately in its own thread.

Parameters:

updater - is the updater to add and run

execute

public void execute(GraphWriterRunnable runnable)

This is the method to use to modify the graph from the updaters. The runnables will be scheduled after each other, guaranteeing that only one of these runnables will be active at any time.

Parameters:

runnable - is a graph writer runnable

executeBlocking

public void executeBlocking(GraphWriterRunnable runnable)
                     throws InterruptedException,
                            ExecutionException

This is another method to use to modify the graph from the updaters. It behaves like execute, but blocks until the runnable has been executed. This might be particularly useful in the setup method of an updater.

Parameters:

runnable - is a graph writer runnable

Throws:

ExecutionException

InterruptedException

See Also:

GraphUpdaterManager.execute

size

public int size()

getUpdaterDescriptions

public Map<Integer,String> getUpdaterDescriptions()

Just an example of fetching status information from the graph updater manager to expose it in a web service. More useful stuff should be added later.

getUpdater

public GraphUpdater getUpdater(int id)

Just an example of fetching status information from the graph updater manager to expose it in a web service. More useful stuff should be added later.