/*
 *
 * 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.bookkeeper.proto;

import org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.GenericCallback;

/**
 * An interface to manage channel pooling for bookie client.
 */
interface PerChannelBookieClientPool {

    /**
     * intialize the pool. the implementation should not be blocked.
     */
    void intialize();

    /**
     * Obtain a channel from channel pool to execute operations.
     *
     * @param callback
     *          callback to return channel from channel pool.
     */
    void obtain(GenericCallback<PerChannelBookieClient> callback);

    /**
     * record any read/write error on {@link PerChannelBookieClientPool}
     */
    void recordError();

    /**
     * Disconnect the connections in the pool.
     *
     * @param wait
     *          whether need to wait until pool disconnected.
     */
    void disconnect(boolean wait);

    /**
     * Close the pool.
     *
     * @param wait
     *          whether need to wait until pool closed.
     */
    void close(boolean wait);

}