edu.vub.at.actors.net.cmd
Class CMDInitRequireServices

java.lang.Object
  edu.vub.at.actors.net.cmd.VMCommand
      edu.vub.at.actors.net.cmd.CMDInitRequireServices

All Implemented Interfaces:

java.io.Serializable

public class CMDInitRequireServices

extends VMCommand

A CMDInitRequireServices message is sent asynchronously to any VM just discovered in the environment if thhe discovering VM has some open subscriptions. This command is sent to the discovered VM to ask it whether it has any publications matching the outstanding subscriptions at the sender VM. SENDER: the discovering VM RECEIVER: the discovered VM MODE: ASYNCHRONOUS, UNICAST PROPERTIES: outstanding subscription topics of sender REPLY: potential CMDJoinServices

Author:

tvcutsem

See Also:

Serialized Form

Field Summary

private java.util.Set

topics_ A Set of Packet objects representing serialized ATStripe topics.

Fields inherited from class edu.vub.at.actors.net.cmd.VMCommand

_TRANSMISSION_TIMEOUT_

Constructor Summary

CMDInitRequireServices(java.util.Set topics)

Method Summary

void	send(org.jgroups.blocks.MessageDispatcher dispatcher, org.jgroups.Address recipientVM)
java.lang.Object	uponReceiptBy(ELVirtualMachine remoteHost, org.jgroups.Message wrapper) To be overridden by subclasses to specify the behaviour to execute upon reception and execution of the command object at the recipient VM.

Methods inherited from class edu.vub.at.actors.net.cmd.VMCommand

sendAsyncMulticast, sendAsyncUnicast, sendSynchronousUnicast, toString

Methods inherited from class java.lang.Object

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

Field Detail

topics_

private final java.util.Set topics_

A Set of Packet objects representing serialized ATStripe topics.

Constructor Detail

CMDInitRequireServices

public CMDInitRequireServices(java.util.Set topics)

Method Detail

send

public void send(org.jgroups.blocks.MessageDispatcher dispatcher,
                 org.jgroups.Address recipientVM)

uponReceiptBy

public java.lang.Object uponReceiptBy(ELVirtualMachine remoteHost,
                                      org.jgroups.Message wrapper)
                               throws java.lang.Exception

Description copied from class: VMCommand

To be overridden by subclasses to specify the behaviour to execute upon reception and execution of the command object at the recipient VM. This code is still executed in a JGroups thread!

Specified by:

uponReceiptBy in class VMCommand

Parameters:

remoteHost - the host at which the command arrived and is executed

wrapper - the JGroups message wrapper that was used to transport this command object

Throws:

java.lang.Exception