org.apache.manifoldcf.connectorcommon.throttler

Class ThrottleGroups

java.lang.Object

org.apache.manifoldcf.connectorcommon.throttler.ThrottleGroups

All Implemented Interfaces:

IThrottleGroups

public class ThrottleGroups
extends java.lang.Object
implements IThrottleGroups

An implementation of IThrottleGroups, which establishes a JVM-wide pool of throttlers that can be used as a resource by any connector that needs it.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	_rcsid
protected IThreadContext	threadContext The thread context
protected static Throttler	throttler The actual static pool

Constructor Summary

Constructors

Constructor and Description
ThrottleGroups(IThreadContext threadContext) Constructor

Method Summary

Modifier and Type	Method and Description
void	createOrUpdateThrottleGroup(java.lang.String throttleGroupType, java.lang.String throttleGroup, IThrottleSpec throttleSpec) Set or update throttle specification for a throttle group.
void	destroy() Shut down throttler permanently.
void	freeUnusedResources() Free unused resources.
java.util.Set<java.lang.String>	getThrottleGroups(java.lang.String throttleGroupType) Get all existing throttle groups for a throttle group type.
IConnectionThrottler	obtainConnectionThrottler(java.lang.String throttleGroupType, java.lang.String throttleGroup, java.lang.String[] binNames) Construct connection throttler for connections with specific bin names.
void	poll() Poll periodically, to update ALL cluster-wide statistics and allocation.
void	poll(java.lang.String throttleGroupType) Poll periodically, to update cluster-wide statistics and allocation.
void	removeThrottleGroup(java.lang.String throttleGroupType, java.lang.String throttleGroup) Remove a throttle group.

Methods inherited from class java.lang.Object

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

Field Detail

_rcsid

public static final java.lang.String _rcsid

See Also:

Constant Field Values

threadContext

protected final IThreadContext threadContext

The thread context

throttler

protected static final Throttler throttler

The actual static pool

Constructor Detail

ThrottleGroups

public ThrottleGroups(IThreadContext threadContext)
               throws ManifoldCFException

Constructor

Throws:

ManifoldCFException

Method Detail

getThrottleGroups

public java.util.Set<java.lang.String> getThrottleGroups(java.lang.String throttleGroupType)
                                                  throws ManifoldCFException

Get all existing throttle groups for a throttle group type. The throttle group type typically describes a connector class, while the throttle group represents a namespace of bin names specific to that connector class.

Specified by:

getThrottleGroups in interface IThrottleGroups

Parameters:

throttleGroupType - is the throttle group type.

Returns:

the set of throttle groups for that group type.

Throws:

ManifoldCFException

removeThrottleGroup

public void removeThrottleGroup(java.lang.String throttleGroupType,
                                java.lang.String throttleGroup)
                         throws ManifoldCFException

Remove a throttle group.

Specified by:

removeThrottleGroup in interface IThrottleGroups

Parameters:

throttleGroupType - is the throttle group type.

throttleGroup - is the throttle group.

Throws:

ManifoldCFException

createOrUpdateThrottleGroup

public void createOrUpdateThrottleGroup(java.lang.String throttleGroupType,
                                        java.lang.String throttleGroup,
                                        IThrottleSpec throttleSpec)
                                 throws ManifoldCFException

Set or update throttle specification for a throttle group. This creates the throttle group if it does not yet exist.

Specified by:

createOrUpdateThrottleGroup in interface IThrottleGroups

Parameters:

throttleGroupType - is the throttle group type.

throttleGroup - is the throttle group.

throttleSpec - is the desired throttle specification object.

Throws:

ManifoldCFException

obtainConnectionThrottler

public IConnectionThrottler obtainConnectionThrottler(java.lang.String throttleGroupType,
                                                      java.lang.String throttleGroup,
                                                      java.lang.String[] binNames)
                                               throws ManifoldCFException

Construct connection throttler for connections with specific bin names. This object is meant to be embedded with a connection pool of similar objects, and used to gate the creation of new connections in that pool.

Specified by:

obtainConnectionThrottler in interface IThrottleGroups

Parameters:

throttleGroupType - is the throttle group type.

throttleGroup - is the throttle group.

binNames - are the connection type bin names.

Returns:

the connection throttling object, or null if the pool is being shut down.

Throws:

ManifoldCFException

poll

public void poll(java.lang.String throttleGroupType)
          throws ManifoldCFException

Poll periodically, to update cluster-wide statistics and allocation.

Specified by:

poll in interface IThrottleGroups

Parameters:

throttleGroupType - is the throttle group type to update.

Throws:

ManifoldCFException

poll

public void poll()
          throws ManifoldCFException

Poll periodically, to update ALL cluster-wide statistics and allocation.

Specified by:

poll in interface IThrottleGroups

Throws:

ManifoldCFException

freeUnusedResources

public void freeUnusedResources()
                         throws ManifoldCFException

Free unused resources.

Specified by:

freeUnusedResources in interface IThrottleGroups

Throws:

ManifoldCFException

destroy

public void destroy()
             throws ManifoldCFException

Shut down throttler permanently.

Specified by:

destroy in interface IThrottleGroups

Throws:

ManifoldCFException