Package org.opennms.netmgt.dao.support

Class DefaultServiceTracker

java.lang.Object

org.opennms.netmgt.dao.support.DefaultServiceTracker

All Implemented Interfaces:

ServiceTracker

public class DefaultServiceTracker
extends Object
implements ServiceTracker

Maintains sessions for each service being tracked. Most of the work is delegated to the FilterWatcher: when the results of a filter change, we re-evaluate the state and issue callback accordingly.

Author:

jwhite

Nested Class Summary

Nested classes/interfaces inherited from interface org.opennms.netmgt.dao.api.ServiceTracker

ServiceTracker.ServiceListener

Constructor Summary

Constructors

Constructor	Description
DefaultServiceTracker()

Method Summary

Modifier and Type	Method	Description
void	setFilterWatcher(FilterWatcher filterWatcher)
Closeable	trackService(String serviceName, ServiceTracker.ServiceListener listener)	Issues callbacks to the given listener for services that: 1) Have the given service name Callbacks are expected to be issued immediately for all existing services that match the criteria.
Closeable	trackServiceMatchingFilterRule(String serviceName, String filterRule, ServiceTracker.ServiceListener listener)	Issues callbacks to the given listener for services that: 1) Have the given service name 2) Match the given filter rule Callbacks are expected to be issued immediately for all existing services that match the criteria.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultServiceTracker

public DefaultServiceTracker()

Method Detail

trackServiceMatchingFilterRule

public Closeable trackServiceMatchingFilterRule(String serviceName,
                                                String filterRule,
                                                ServiceTracker.ServiceListener listener)

Description copied from interface: ServiceTracker

Issues callbacks to the given listener for services that: 1) Have the given service name 2) Match the given filter rule Callbacks are expected to be issued immediately for all existing services that match the criteria. Additional callback will be made as services are added/removed.

Specified by:

trackServiceMatchingFilterRule in interface ServiceTracker

Parameters:

serviceName - only interfaces with the given service name attached will be considered

filterRule - only interfaces that match the given filter will be considered if null, or empty the filter will match everything

listener - used for callbacks

Returns:

close when done watching

trackService

public Closeable trackService(String serviceName,
                              ServiceTracker.ServiceListener listener)

Description copied from interface: ServiceTracker

Issues callbacks to the given listener for services that: 1) Have the given service name Callbacks are expected to be issued immediately for all existing services that match the criteria. Additional callback will be made as services are added/removed.

Specified by:

trackService in interface ServiceTracker

Parameters:

serviceName - only interfaces with the given service name attached will be considered

listener - used for callbacks

Returns:

close when done watching

setFilterWatcher

public void setFilterWatcher(FilterWatcher filterWatcher)