org.sapia.soto.ubik.monitor.impl
Class UbikMonitorAgentLayer

java.lang.Object
  org.sapia.soto.ubik.monitor.impl.AbstractMonitorAgentLayer
      org.sapia.soto.ubik.monitor.impl.UbikMonitorAgentLayer

All Implemented Interfaces:

java.rmi.Remote, EnvAware, Layer, MonitorConsts, MonitorAgent, org.sapia.ubik.mcast.AsyncEventListener, org.sapia.util.xml.confix.ObjectHandlerIF

public class UbikMonitorAgentLayer
extends AbstractMonitorAgentLayer
implements EnvAware, org.sapia.ubik.mcast.AsyncEventListener, MonitorConsts, java.rmi.Remote

This class extends the AbstractMonitorAgentLayer class and adds support for making its status check method call available remotely, using the Ubik distributed computing framework.

An instance of this class publishes itself over multicast to remote monitors by using an EventChannelinstance. In addition, it discovers appearing remote monitors through similar logic (in this case, it is remote monitors that publish their presence over multicast and are discovered by instances of this class).

In addition, an instance of this class detects if it has been started by a Corus server, and if so registers itself with Corus' process status notification mechanism.

Author:

yduchesne

Nested Class Summary

Nested classes/interfaces inherited from class org.sapia.soto.ubik.monitor.impl.AbstractMonitorAgentLayer

AbstractMonitorAgentLayer.Arg, AbstractMonitorAgentLayer.MethodDescriptor

Field Summary

Fields inherited from class org.sapia.soto.ubik.monitor.impl.AbstractMonitorAgentLayer

_method

Fields inherited from interface org.sapia.soto.ubik.monitor.impl.MonitorConsts

DISCO_ADMIN, DISCO_AGENT

Constructor Summary

UbikMonitorAgentLayer()

Method Summary

void	dispose()
void	init(ServiceMetaData meta)
protected void	lookupChannel()
void	onAsyncEvent(org.sapia.ubik.mcast.RemoteEvent evt)
protected java.util.Properties	postProcess(java.util.Properties props)
void	setEnv(Env env)
void	setEventChannel(EventChannelProvider channel) Sets the event channel to be used by this instance to perform publishing and discovery over multicast.
void	start(ServiceMetaData meta)

Methods inherited from class org.sapia.soto.ubik.monitor.impl.AbstractMonitorAgentLayer

checkStatus, createInvoke, handleObject, setId, setInvoke

Methods inherited from class java.lang.Object

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

Constructor Detail

UbikMonitorAgentLayer

public UbikMonitorAgentLayer()

Method Detail

setEnv

public void setEnv(Env env)

Specified by:

setEnv in interface EnvAware

setEventChannel

public void setEventChannel(EventChannelProvider channel)

Sets the event channel to be used by this instance to perform publishing and discovery over multicast.

Parameters:

channel - an EventChannelProvider.

init

public void init(ServiceMetaData meta)
          throws java.lang.Exception

Specified by:

init in interface Layer

Overrides:

init in class AbstractMonitorAgentLayer

Throws:

java.lang.Exception

start

public void start(ServiceMetaData meta)
           throws java.lang.Exception

Specified by:

start in interface Layer

Overrides:

start in class AbstractMonitorAgentLayer

Throws:

java.lang.Exception

dispose

public void dispose()

Specified by:

dispose in interface Layer

Overrides:

dispose in class AbstractMonitorAgentLayer

onAsyncEvent

public void onAsyncEvent(org.sapia.ubik.mcast.RemoteEvent evt)

Specified by:

onAsyncEvent in interface org.sapia.ubik.mcast.AsyncEventListener

lookupChannel

protected void lookupChannel()
                      throws java.lang.Exception

Throws:

java.lang.Exception

postProcess

protected java.util.Properties postProcess(java.util.Properties props)

Specified by:

postProcess in class AbstractMonitorAgentLayer

Parameters:

props - status check result properties that are to be processed by inheriting classes (if required).

Returns:

the post-processed Properties.