/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.sshd.server.subsystem.sftp;
/**
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public interface SftpEventListenerManager {
/**
* @return An instance representing <U>all</U> the currently
* registered listeners. Any method invocation is <U>replicated</U>
* to the actually registered listeners
*/
SftpEventListener getSftpEventListenerProxy();
/**
* Register a listener instance
*
* @param listener The {@link SftpEventListener} instance to add - never {@code null}
* @return {@code true} if listener is a previously un-registered one
*/
boolean addSftpEventListener(SftpEventListener listener);
/**
* Remove a listener instance
*
* @param listener The {@link SftpEventListener} instance to remove - never {@code null}
* @return {@code true} if listener is a (removed) registered one
*/
boolean removeSftpEventListener(SftpEventListener listener);
}