/*
 * 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.common.forward;

import java.util.Collection;

/**
 * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
 */
public interface PortForwardingEventListenerManagerHolder {
    /**
     * @return The currently registered managers. <B>Note:</B> it is highly recommended that implementors return either
     *         an un-modifiable collection or a <U>copy</U> of the current one. Callers, should avoid modifying the
     *         retrieved value.
     */
    Collection<PortForwardingEventListenerManager> getRegisteredManagers();

    boolean addPortForwardingEventListenerManager(PortForwardingEventListenerManager manager);

    boolean removePortForwardingEventListenerManager(PortForwardingEventListenerManager manager);
}
