org.osgi.service.cm.ConfigurationEvent Maven / Gradle / Ivy
/*
* Copyright (c) OSGi Alliance (2004, 2013). All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.osgi.service.cm;
import java.util.Dictionary;
import org.osgi.framework.ServiceReference;
/**
* A Configuration Event.
*
*
* {@code ConfigurationEvent} objects are delivered to all registered
* {@code ConfigurationListener} service objects. ConfigurationEvents must be
* asynchronously delivered in chronological order with respect to each
* listener.
*
*
* A type code is used to identify the type of event. The following event types
* are defined:
*
* - {@link #CM_UPDATED}
* - {@link #CM_DELETED}
* - {@link #CM_LOCATION_CHANGED}
*
* Additional event types may be defined in the future.
*
*
* Security Considerations. {@code ConfigurationEvent} objects do not provide
* {@code Configuration} objects, so no sensitive configuration information is
* available from the event. If the listener wants to locate the
* {@code Configuration} object for the specified pid, it must use
* {@code ConfigurationAdmin}.
*
* @see ConfigurationListener
* @Immutable
* @author $Id: b6e83bbc54df92df81679969a438545d8161978f $
* @since 1.2
*/
public class ConfigurationEvent {
/**
* A {@code Configuration} has been updated.
*
*
* This {@code ConfigurationEvent} type that indicates that a
* {@code Configuration} object has been updated with new properties.
*
* An event is fired when a call to {@link Configuration#update(Dictionary)}
* successfully changes a configuration.
*/
public static final int CM_UPDATED = 1;
/**
* A {@code Configuration} has been deleted.
*
*
* This {@code ConfigurationEvent} type that indicates that a
* {@code Configuration} object has been deleted.
*
* An event is fired when a call to {@link Configuration#delete()}
* successfully deletes a configuration.
*/
public static final int CM_DELETED = 2;
/**
* The location of a {@code Configuration} has been changed.
*
*
* This {@code ConfigurationEvent} type that indicates that the location of
* a {@code Configuration} object has been changed.
*
* An event is fired when a call to
* {@link Configuration#setBundleLocation(String)} successfully changes the
* location.
*
* @since 1.4
*/
public static final int CM_LOCATION_CHANGED = 3;
/**
* Type of this event.
*
* @see #getType()
*/
private final int type;
/**
* The factory pid associated with this event.
*/
private final String factoryPid;
/**
* The pid associated with this event.
*/
private final String pid;
/**
* The ConfigurationAdmin service which created this event.
*/
private final ServiceReference reference;
/**
* Constructs a {@code ConfigurationEvent} object from the given
* {@code ServiceReference} object, event type, and pids.
*
* @param reference The {@code ServiceReference} object of the Configuration
* Admin service that created this event.
* @param type The event type. See {@link #getType()}.
* @param factoryPid The factory pid of the associated configuration if the
* target of the configuration is a ManagedServiceFactory. Otherwise
* {@code null} if the target of the configuration is a
* ManagedService.
* @param pid The pid of the associated configuration.
*/
public ConfigurationEvent(ServiceReference reference, int type, String factoryPid, String pid) {
this.reference = reference;
this.type = type;
this.factoryPid = factoryPid;
this.pid = pid;
if ((reference == null) || (pid == null)) {
throw new NullPointerException("reference and pid must not be null");
}
}
/**
* Returns the factory pid of the associated configuration.
*
* @return Returns the factory pid of the associated configuration if the
* target of the configuration is a ManagedServiceFactory. Otherwise
* {@code null} if the target of the configuration is a
* ManagedService.
*/
public String getFactoryPid() {
return factoryPid;
}
/**
* Returns the pid of the associated configuration.
*
* @return Returns the pid of the associated configuration.
*/
public String getPid() {
return pid;
}
/**
* Return the type of this event.
*
* The type values are:
*
* - {@link #CM_UPDATED}
* - {@link #CM_DELETED}
* - {@link #CM_LOCATION_CHANGED}
*
*
* @return The type of this event.
*/
public int getType() {
return type;
}
/**
* Return the {@code ServiceReference} object of the Configuration Admin
* service that created this event.
*
* @return The {@code ServiceReference} object for the Configuration Admin
* service that created this event.
*/
public ServiceReference getReference() {
return reference;
}
}