com.epam.deltix.qsrv.hf.spi.conn.DisconnectableEventHandler Maven / Gradle / Ivy

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/*
 * Copyright 2021 EPAM Systems, Inc
 *
 * See the NOTICE file distributed with this work for additional information
 * regarding copyright ownership. 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 com.epam.deltix.qsrv.hf.spi.conn;

import com.epam.deltix.qsrv.hf.spi.conn.Disconnectable;
import com.epam.deltix.qsrv.hf.spi.conn.DisconnectEventListener;

import java.util.concurrent.CopyOnWriteArrayList;

/**
 * Helps implement the {@link deltix.qsrv.hf.spi.conn.Disconnectable} interface.
 *  Doesn't maintain a connection status, so isConnected must be implemented by a client.
 */
public class DisconnectableEventHandler implements Disconnectable {
    private final CopyOnWriteArrayList listeners =
        new CopyOnWriteArrayList();

    public void addDisconnectEventListener(DisconnectEventListener listener) {
        listeners.addIfAbsent(listener);
    }

    public void removeDisconnectEventListener(DisconnectEventListener listener) {
        listeners.remove(listener);
    }

    public boolean isConnected() {
        throw new UnsupportedOperationException();
    }

    public void onReconnected() {
        for (DisconnectEventListener listener : listeners) {
            listener.onReconnected();
        }
    }

    public void onDisconnected() {
        for (DisconnectEventListener listener : listeners) {
            listener.onDisconnected();
        }
    }
}