Package lumis.portal.cluster

Class SingleServerClusterManager

java.lang.Object

lumis.portal.cluster.AbstractClusterManager

lumis.portal.cluster.SingleServerClusterManager

All Implemented Interfaces:

IClusterManager

public class SingleServerClusterManager
extends AbstractClusterManager

The cluster manager implementation for single server (without cluster) deployment. In a single server environment the sending process triggers the receiving process immediately. As a consequence of this, the transmission consequences happens synchronously, but the same may not happen at a multi-server environment.

Since:

4.0.0

Version:

$Revision: 24491 $ $Date: 2021-05-07 16:17:22 -0300 (Fri, 07 May 2021) $

Field Summary

Fields inherited from class lumis.portal.cluster.AbstractClusterManager

processTransmissionsReceived, serverId, WAIT_LOCAL_PROCESSING_TIMEOUT_MS

Constructor Summary

Constructors

Constructor	Description
SingleServerClusterManager()

Method Summary

Modifier and Type	Method	Description
<T extends Serializable> T	call(IClusterCommand<T> command)	Calls a cluster command execution and returns the result of the local execution.
protected <T extends Serializable> Map<IClusterMember,T>	callAndWaitResponsesInternal(IClusterCallable<T> callable, long timeout)
void	destroy()	Destroys the cluster manager.
IClusterConfig	getClusterConfig(ITransaction transaction)	Returns a persistent cluster configuration object.
IClusterMember	getLocalMember()	Returns the current cluster member object.
Collection<IClusterMember>	getMembers()	Returns a collection with information about the current members of this cluster.
void	init()	Initializes the cluster manager.
void	send(IClusterTransmission transmission)	Sends a transmission.

Methods inherited from class lumis.portal.cluster.AbstractClusterManager

callAndWaitResponses, createClusterCommand, createClusterCommand, createClusterMessage, transmissionReceived

Methods inherited from class java.lang.Object

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

Constructor Detail

SingleServerClusterManager

public SingleServerClusterManager()

Method Detail

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

Overrides:

init in class AbstractClusterManager

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

Overrides:

destroy in class AbstractClusterManager

send

public void send(IClusterTransmission transmission)

Description copied from interface: IClusterManager

Sends a transmission.

Parameters:

transmission - the transmission. It must have been created using one of the factory methods available in IClusterManager.

See Also:

IClusterManager.createClusterCommand(IClusterCallable), IClusterManager.createClusterMessage(String, Serializable)

call

public <T extends Serializable> T call(IClusterCommand<T> command)
                                throws Exception

Description copied from interface: IClusterManager

Calls a cluster command execution and returns the result of the local execution.

This method sends the command through the cluster and gives feedback on the local server execution, in the form of the return value and the raised exception.

It is important to notice that the command will be sent over the cluster despite its execution outcome.

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

Parameters:

command - the command to execute through the cluster.

Returns:

the command execution outcome.

Throws:

Exception - the exception thrown during command execution or other unknown exception.

callAndWaitResponsesInternal

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

Specified by:

callAndWaitResponsesInternal in class AbstractClusterManager

Throws:

ClusterInvocationException

TimeoutException

InterruptedException

See Also:

#callAndWaitResponses(IClusterCommand, long)

getMembers

public Collection<IClusterMember> getMembers()

Description copied from interface: IClusterManager

Returns a collection with information about the current members of this cluster.

Returns:

a collection with information about the current members of this cluster.

getLocalMember

public IClusterMember getLocalMember()

Description copied from interface: IClusterManager

Returns the current cluster member object. The object returned represents the member where this method is executed on.

Returns:

this server cluster member object.

getClusterConfig

public IClusterConfig getClusterConfig(ITransaction transaction)
                                throws PortalException

Description copied from interface: IClusterManager

Returns a persistent cluster configuration object. The object contains the cluster configurations, and any changes will be applied on transaction commit.

Parameters:

transaction - the transaction for persistence access.

Returns:

a persistent cluster configuration instance.

Throws:

PortalException