Package lumis.portal.cluster

Class AbstractClusterManager

java.lang.Object

lumis.portal.cluster.AbstractClusterManager

All Implemented Interfaces:

IClusterManager

Direct Known Subclasses:

JGroupsClusterManager, SingleServerClusterManager

public abstract class AbstractClusterManager
extends Object
implements IClusterManager

Generic implementation for IClusterManager, independent of communication form.

Since:

4.0.0

Version:

$Revision: 23904 $ $Date: 2020-06-16 12:23:44 -0300 (Tue, 16 Jun 2020) $

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	processTransmissionsReceived	Indicates whether transmissionReceived(IClusterTransmission) processes the given transmission.
protected String	serverId	The identifier for this cluster node.
protected static long	WAIT_LOCAL_PROCESSING_TIMEOUT_MS	Wait local processing timeout in milliseconds.

Constructor Summary

Constructors

Constructor	Description
AbstractClusterManager()

Method Summary

Modifier and Type	Method	Description
<T extends Serializable> Map<IClusterMember,T>	callAndWaitResponses(IClusterCallable<T> command, long timeout)	Calls a cluster command execution and waits all current cluster servers to respond with their result and, then, returns an unmodifiable map having the cluster member as the key and the execution result as the value.
protected abstract <T extends Serializable> Map<IClusterMember,T>	callAndWaitResponsesInternal(IClusterCallable<T> command, long timeout)
IClusterCommand<Serializable>	createClusterCommand(Runnable runnable)	Creates a cluster command instance and returns it.
<T extends Serializable> IClusterCommand<T>	createClusterCommand(IClusterCallable<T> callable)	Creates a cluster command instance and returns it.
IClusterMessage	createClusterMessage(String group, Serializable data)	Creates a cluster message instance and returns it.
void	destroy()	Destroys the cluster manager.
void	init()	Initializes the cluster manager.
protected <T extends Serializable> ITransmissionResult<T>	transmissionReceived(IClusterTransmission transmission)	Processes a received transmission.

Methods inherited from class java.lang.Object

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

Methods inherited from interface lumis.portal.cluster.IClusterManager

call, getClusterConfig, getLocalMember, getMembers, send

Field Detail

WAIT_LOCAL_PROCESSING_TIMEOUT_MS

protected static final long WAIT_LOCAL_PROCESSING_TIMEOUT_MS

Wait local processing timeout in milliseconds.

Since:

12.4.0

See Also:

Constant Field Values

serverId

protected String serverId

The identifier for this cluster node.

Since:

4.1.0

processTransmissionsReceived

protected boolean processTransmissionsReceived

Indicates whether transmissionReceived(IClusterTransmission) processes the given transmission.

Since:

4.1.0

Constructor Detail

AbstractClusterManager

public AbstractClusterManager()

Method Detail

transmissionReceived

protected <T extends Serializable> ITransmissionResult<T> transmissionReceived(IClusterTransmission transmission)

Processes a received transmission. Subclasses should call this method whenever a transmission is received. processTransmissionsReceived may be used to disable the processing done by this method.

Parameters:

transmission - the transmission received.

Since:

4.1.0

init

public void init()

Description copied from interface: IClusterManager

Initializes the cluster manager. This method should start the monitoring and connections necessary for the cluster manager to execute its communications.

Specified by:

init in interface IClusterManager

destroy

public void destroy()

Description copied from interface: IClusterManager

Destroys the cluster manager. This method should close all resources used by the cluster manager.

Specified by:

destroy in interface IClusterManager

createClusterCommand

public IClusterCommand<Serializable> createClusterCommand(Runnable runnable)

Description copied from interface: IClusterManager

Creates a cluster command instance and returns it.

Specified by:

createClusterCommand in interface IClusterManager

Parameters:

runnable - the runnable that contains the command's execution. It must be serializable.

See Also:

IClusterCommand

createClusterCommand

public <T extends Serializable> IClusterCommand<T> createClusterCommand(IClusterCallable<T> callable)

Description copied from interface: IClusterManager

Creates a cluster command instance and returns it.

Specified by:

createClusterCommand in interface IClusterManager

Parameters:

callable - the IClusterCallable that contains the command's execution. It must be serializable.

Returns:

the created cluster command.

createClusterMessage

public IClusterMessage createClusterMessage(String group,
                                            Serializable data)

Description copied from interface: IClusterManager

Creates a cluster message instance and returns it.

Specified by:

createClusterMessage in interface IClusterManager

Parameters:

group - the destination group for the message.

data - the data sent in the message.

Returns:

the cluster message created.

See Also:

IClusterMessage

callAndWaitResponses

public <T extends Serializable> Map<IClusterMember,T> callAndWaitResponses(IClusterCallable<T> command,
                                                                                 long timeout)
                                                                          throws ClusterInvocationException,
                                                                                 TimeoutException,
                                                                                 InterruptedException,
                                                                                 IllegalArgumentException

Description copied from interface: IClusterManager

Calls a cluster command execution and waits all current cluster servers to respond with their result and, then, returns an unmodifiable map having the cluster member as the key and the execution result as the value.

If some server raises an exception, a ClusterInvocationException will be raised locally on the server that called this method with all exceptions that happened in the servers as suppressed.

This method has no guarantee it will execute properly if cluster members enter or leave the cluster during its execution.

If all responses couldn't be retrieved in the given timeout, a TimeoutException will be raised.

The given command must have been created through IClusterManager.createClusterCommand(IClusterCallable).

Specified by:

callAndWaitResponses in interface IClusterManager

Type Parameters:

T - the response type. it must be serializable.

Parameters:

command - the command to be invoked.

timeout - the timeout this method will wait the invoke finishes.

Returns:

a map with all responses.

Throws:

ClusterInvocationException - if some server raises an exception during the invoke.

TimeoutException - if the timeout has been reached and not all responses were returned.

InterruptedException - if the thread that called this method was interrupted.

IllegalArgumentException - if the given command is null.

callAndWaitResponsesInternal

protected abstract <T extends Serializable> Map<IClusterMember,T> callAndWaitResponsesInternal(IClusterCallable<T> command,
                                                                                                     long timeout)
                                                                                              throws ClusterInvocationException,
                                                                                                     TimeoutException,
                                                                                                     InterruptedException

Throws:

ClusterInvocationException

TimeoutException

InterruptedException

See Also:

#callAndWaitResponses(IClusterCommand, long)