Apache ZooKeeper is an open-source server which enables highly reliable distributed coordination.

Apache ZooKeeper Server Source Code files are provided in the source packge (apache-zookeeper-3.7.0.tar.gz). You can download it at Apache ZooKeeper Website.

You can also browse Apache ZooKeeper Server Source Code below:

⏎ org/apache/zookeeper/server/Stats.java

/*
 * 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.zookeeper.server;

import java.util.Date;

/**
 * Statistics on the ServerCnxn
 */
interface Stats {

    /** Date/time the connection was established
     * @since 3.3.0 */
    Date getEstablished();

    /**
     * The number of requests that have been submitted but not yet
     * responded to.
     */
    long getOutstandingRequests();
    /** Number of packets received */
    long getPacketsReceived();
    /** Number of packets sent (incl notifications) */
    long getPacketsSent();
    /** Min latency in ms
     * @since 3.3.0 */
    long getMinLatency();
    /** Average latency in ms
     * @since 3.3.0 */
    long getAvgLatency();
    /** Max latency in ms
     * @since 3.3.0 */
    long getMaxLatency();
    /** Last operation performed by this connection
     * @since 3.3.0 */
    String getLastOperation();
    /** Last cxid of this connection
     * @since 3.3.0 */
    long getLastCxid();
    /** Last zxid of this connection
     * @since 3.3.0 */
    long getLastZxid();
    /** Last time server sent a response to client on this connection
     * @since 3.3.0 */
    long getLastResponseTime();
    /** Latency of last response to client on this connection in ms
     * @since 3.3.0 */
    long getLastLatency();

    /** Reset counters
     * @since 3.3.0 */
    void resetStats();

}

⏎ org/apache/zookeeper/server/Stats.java

Or download all of them as a single archive file:

File name: zookeeper-server-3.7.0-fyi.zip
File size: 871011 bytes
Release date: 2021-05-17
Download 

⇒ Apache ZooKeeper 3.7.0 Jute Source Code

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