org.jgroups.protocols.rules
Class CheckFDMonitor

java.lang.Object
  org.jgroups.protocols.rules.Rule
      org.jgroups.protocols.rules.CheckFDMonitor

All Implemented Interfaces:

java.lang.Runnable

public class CheckFDMonitor
extends Rule

Rule which checks if the FD monitor is running when we have more than 1 member. If not, starts it. The rule uninstalls itself if no FD protocol is found.

Since:

3.3

Author:

Bela Ban

Field Summary

protected FD

fd

Fields inherited from class org.jgroups.protocols.rules.Rule

log, sv

Constructor Summary

CheckFDMonitor()

Method Summary

java.lang.String	condition() Returns a description of the condition that led to Rule.eval() returning true
java.lang.String	description() Describes what the rules does
boolean	eval() Evaluates the condition.
void	init() Called when rule is installed
java.lang.String	name() Returns the name of the rule.
java.lang.String	toString()
void	trigger() The action of the rule.

Methods inherited from class org.jgroups.protocols.rules.Rule

destroy, log, run, supervisor

Methods inherited from class java.lang.Object

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

Field Detail

fd

protected FD fd

Constructor Detail

CheckFDMonitor

public CheckFDMonitor()

Method Detail

name

public java.lang.String name()

Description copied from class: Rule

Returns the name of the rule. Should be unique if a rule needs to be uninstalled

Specified by:

name in class Rule

description

public java.lang.String description()

Description copied from class: Rule

Describes what the rules does

Specified by:

description in class Rule

init

public void init()

Description copied from class: Rule

Called when rule is installed

Overrides:

init in class Rule

eval

public boolean eval()

Description copied from class: Rule

Evaluates the condition. If true, the rule is triggered. If true, the next execution of Rule.condition() should return a non-null string

Specified by:

eval in class Rule

condition

public java.lang.String condition()

Description copied from class: Rule

Returns a description of the condition that led to Rule.eval() returning true

Specified by:

condition in class Rule

trigger

public void trigger()
             throws java.lang.Throwable

Description copied from class: Rule

The action of the rule. Triggered if Rule.eval() returned true

Specified by:

trigger in class Rule

Throws:

java.lang.Throwable

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object