/*
 * 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.ignite.spi.discovery.zk.internal;

import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;

/**
 *
 */
abstract class ZkAbstractWatcher extends ZkAbstractCallback implements Watcher {
    /**
     * @param rtState Runtime state.
     * @param impl Discovery impl.
     */
    ZkAbstractWatcher(ZkRuntimeState rtState, ZookeeperDiscoveryImpl impl) {
        super(rtState, impl);
    }

    /** {@inheritDoc} */
    @Override public final void process(WatchedEvent evt) {
        if (!onProcessStart())
            return;

        try {
            process0(evt);

            onProcessEnd();
        }
        catch (Throwable e) {
            onProcessError(e);
        }
    }

    /**
     * @param evt Event.
     * @throws Exception If failed.
     */
    protected abstract void process0(WatchedEvent evt) throws Exception;
}
