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/quorum/LeaderBean.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.quorum;

import org.apache.zookeeper.server.ZooKeeperServer;
import org.apache.zookeeper.server.ZooKeeperServerBean;
import org.apache.zookeeper.server.quorum.QuorumPeer.LearnerType;

/**
 * Leader MBean interface implementation.
 */
public class LeaderBean extends ZooKeeperServerBean implements LeaderMXBean {

    private final Leader leader;

    public LeaderBean(Leader leader, ZooKeeperServer zks) {
        super(zks);
        this.leader = leader;
    }

    public String getName() {
        return "Leader";
    }

    public String getCurrentZxid() {
        return "0x" + Long.toHexString(zks.getZxid());
    }

    public String followerInfo() {
        StringBuilder sb = new StringBuilder();
        for (LearnerHandler handler : leader.getLearners()) {
            if (handler.getLearnerType() == LearnerType.PARTICIPANT) {
                sb.append(handler.toString()).append("\n");
            }
        }
        return sb.toString();
    }

    @Override
    public String nonVotingFollowerInfo() {
        StringBuilder sb = new StringBuilder();
        for (LearnerHandler handler : leader.getNonVotingFollowers()) {
            sb.append(handler.toString()).append("\n");
        }
        return sb.toString();
    }

    @Override
    public long getElectionTimeTaken() {
        return leader.self.getElectionTimeTaken();
    }

    @Override
    public int getLastProposalSize() {
        return leader.getProposalStats().getLastBufferSize();
    }

    @Override
    public int getMinProposalSize() {
        return leader.getProposalStats().getMinBufferSize();
    }

    @Override
    public int getMaxProposalSize() {
        return leader.getProposalStats().getMaxBufferSize();
    }

    @Override
    public void resetProposalStatistics() {
        leader.getProposalStats().reset();
    }

    @Override
    public int getMaxConcurrentSnapSyncs() {
        return leader.getMaxConcurrentSnapSyncs();
    }

    @Override
    public void setMaxConcurrentSnapSyncs(int maxConcurrentSnapshots) {
        leader.setMaxConcurrentSnapSyncs(maxConcurrentSnapshots);
    }

    @Override
    public int getMaxConcurrentDiffSyncs() {
        return leader.getMaxConcurrentDiffSyncs();
    }

    @Override
    public void setMaxConcurrentDiffSyncs(int maxConcurrentDiffSyncs) {
        leader.setMaxConcurrentDiffSyncs(maxConcurrentDiffSyncs);
    }

}

⏎ org/apache/zookeeper/server/quorum/LeaderBean.java

 

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