/*
* Copyright 2012 NGDATA nv
*
* 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.lilyproject.plugin;
/**
* Interface to be implemented by the user of a particular
* type of plugin.
*
* <p>The {@link #pluginAdded} and {@link #pluginRemoved} methods will
* never be called concurrently by multiple threads.
*/
public interface PluginUser<T> {
/**
* Notification of an available plugin.
*
* <p>Plugin users can be guaranteed that there won't be two
* plugins registred with the same name (unless previously removed via
* {@link #pluginRemoved}. The name also won't be null, an empty string,
* or a whitespace string.
*/
void pluginAdded(PluginHandle<T> pluginHandle);
void pluginRemoved(PluginHandle<T> pluginHandle);
}