1 files changed, 0 insertions, 309 deletions

diff --git a/zookeeper-server/zookeeper-server-3.9.2/src/main/java/org/apache/zookeeper/server/quorum/LeaderZooKeeperServer.java b/zookeeper-server/zookeeper-server-3.9.2/src/main/java/org/apache/zookeeper/server/quorum/LeaderZooKeeperServer.java
deleted file mode 100644
index 1f629bed73d..00000000000
--- a/zookeeper-server/zookeeper-server-3.9.2/src/main/java/org/apache/zookeeper/server/quorum/LeaderZooKeeperServer.java
+++ /dev/null
@@ -1,309 +0,0 @@
-/*
- * 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 java.io.IOException;
-import java.util.concurrent.TimeUnit;
-import java.util.function.Function;
-import javax.management.JMException;
-import org.apache.zookeeper.KeeperException.SessionExpiredException;
-import org.apache.zookeeper.jmx.MBeanRegistry;
-import org.apache.zookeeper.metrics.MetricsContext;
-import org.apache.zookeeper.server.ContainerManager;
-import org.apache.zookeeper.server.DataTreeBean;
-import org.apache.zookeeper.server.FinalRequestProcessor;
-import org.apache.zookeeper.server.PrepRequestProcessor;
-import org.apache.zookeeper.server.Request;
-import org.apache.zookeeper.server.RequestProcessor;
-import org.apache.zookeeper.server.ServerCnxn;
-import org.apache.zookeeper.server.ServerMetrics;
-import org.apache.zookeeper.server.ZKDatabase;
-import org.apache.zookeeper.server.persistence.FileTxnSnapLog;
-
-/**
- *
- * Just like the standard ZooKeeperServer. We just replace the request
- * processors: PrepRequestProcessor -> ProposalRequestProcessor ->
- * CommitProcessor -> Leader.ToBeAppliedRequestProcessor ->
- * FinalRequestProcessor
- */
-public class LeaderZooKeeperServer extends QuorumZooKeeperServer {
-
-    private ContainerManager containerManager;  // guarded by sync
-
-    CommitProcessor commitProcessor;
-
-    PrepRequestProcessor prepRequestProcessor;
-
-    /**
-     * @throws IOException
-     */
-    public LeaderZooKeeperServer(FileTxnSnapLog logFactory, QuorumPeer self, ZKDatabase zkDb) throws IOException {
-        super(logFactory, self.tickTime, self.minSessionTimeout, self.maxSessionTimeout, self.clientPortListenBacklog, zkDb, self);
-    }
-
-    public Leader getLeader() {
-        return self.leader;
-    }
-
-    @Override
-    protected void setupRequestProcessors() {
-        RequestProcessor finalProcessor = new FinalRequestProcessor(this);
-        RequestProcessor toBeAppliedProcessor = new Leader.ToBeAppliedRequestProcessor(finalProcessor, getLeader());
-        commitProcessor = new CommitProcessor(toBeAppliedProcessor, Long.toString(getServerId()), false, getZooKeeperServerListener());
-        commitProcessor.start();
-        ProposalRequestProcessor proposalProcessor = new ProposalRequestProcessor(this, commitProcessor);
-        proposalProcessor.initialize();
-        prepRequestProcessor = new PrepRequestProcessor(this, proposalProcessor);
-        prepRequestProcessor.start();
-        firstProcessor = new LeaderRequestProcessor(this, prepRequestProcessor);
-
-        setupContainerManager();
-    }
-
-    private synchronized void setupContainerManager() {
-        containerManager = new ContainerManager(
-            getZKDatabase(),
-            prepRequestProcessor,
-            Integer.getInteger("znode.container.checkIntervalMs", (int) TimeUnit.MINUTES.toMillis(1)),
-            Integer.getInteger("znode.container.maxPerMinute", 10000),
-            Long.getLong("znode.container.maxNeverUsedIntervalMs", 0)
-        );
-    }
-
-    @Override
-    public synchronized void startup() {
-        super.startup();
-        if (containerManager != null) {
-            containerManager.start();
-        }
-    }
-
-    @Override
-    protected void registerMetrics() {
-        super.registerMetrics();
-
-        MetricsContext rootContext = ServerMetrics.getMetrics().getMetricsProvider().getRootContext();
-        rootContext.registerGauge("learners", gaugeWithLeader(
-                (leader) -> leader.getLearners().size())
-        );
-        rootContext.registerGauge("synced_followers", gaugeWithLeader(
-                (leader) -> leader.getForwardingFollowers().size()
-        ));
-        rootContext.registerGauge("synced_non_voting_followers", gaugeWithLeader(
-                (leader) -> leader.getNonVotingFollowers().size()
-        ));
-        rootContext.registerGauge("synced_observers", self::getSynced_observers_metric);
-        rootContext.registerGauge("pending_syncs", gaugeWithLeader(
-                (leader) -> leader.getNumPendingSyncs()
-        ));
-        rootContext.registerGauge("leader_uptime", gaugeWithLeader(
-                (leader) -> leader.getUptime()
-        ));
-        rootContext.registerGauge("last_proposal_size", gaugeWithLeader(
-                (leader) -> leader.getProposalStats().getLastBufferSize()
-        ));
-        rootContext.registerGauge("max_proposal_size", gaugeWithLeader(
-                (leader) -> leader.getProposalStats().getMaxBufferSize()
-        ));
-        rootContext.registerGauge("min_proposal_size", gaugeWithLeader(
-                (leader) -> leader.getProposalStats().getMinBufferSize()
-        ));
-    }
-
-    private org.apache.zookeeper.metrics.Gauge gaugeWithLeader(Function<Leader, Number> supplier) {
-        return () -> {
-            final Leader leader = getLeader();
-            if (leader == null) {
-                return null;
-            }
-            return supplier.apply(leader);
-        };
-    }
-
-    @Override
-    protected void unregisterMetrics() {
-        super.unregisterMetrics();
-
-        MetricsContext rootContext = ServerMetrics.getMetrics().getMetricsProvider().getRootContext();
-        rootContext.unregisterGauge("learners");
-        rootContext.unregisterGauge("synced_followers");
-        rootContext.unregisterGauge("synced_non_voting_followers");
-        rootContext.unregisterGauge("synced_observers");
-        rootContext.unregisterGauge("pending_syncs");
-        rootContext.unregisterGauge("leader_uptime");
-
-        rootContext.unregisterGauge("last_proposal_size");
-        rootContext.unregisterGauge("max_proposal_size");
-        rootContext.unregisterGauge("min_proposal_size");
-    }
-
-    @Override
-    public synchronized void shutdown(boolean fullyShutDown) {
-        if (containerManager != null) {
-            containerManager.stop();
-        }
-        super.shutdown(fullyShutDown);
-    }
-
-    @Override
-    public int getGlobalOutstandingLimit() {
-        int divisor = self.getQuorumSize() > 2 ? self.getQuorumSize() - 1 : 1;
-        int globalOutstandingLimit = super.getGlobalOutstandingLimit() / divisor;
-        return globalOutstandingLimit;
-    }
-
-    @Override
-    public void createSessionTracker() {
-        sessionTracker = new LeaderSessionTracker(
-            this,
-            getZKDatabase().getSessionWithTimeOuts(),
-            tickTime,
-            self.getMyId(),
-            self.areLocalSessionsEnabled(),
-            getZooKeeperServerListener());
-    }
-
-    public boolean touch(long sess, int to) {
-        return sessionTracker.touchSession(sess, to);
-    }
-
-    public boolean checkIfValidGlobalSession(long sess, int to) {
-        if (self.areLocalSessionsEnabled() && !upgradeableSessionTracker.isGlobalSession(sess)) {
-            return false;
-        }
-        return sessionTracker.touchSession(sess, to);
-    }
-
-    /**
-     * Requests coming from the learner should go directly to
-     * PrepRequestProcessor
-     *
-     * @param request
-     */
-    public void submitLearnerRequest(Request request) {
-        /*
-         * Requests coming from the learner should have gone through
-         * submitRequest() on each server which already perform some request
-         * validation, so we don't need to do it again.
-         *
-         * Additionally, LearnerHandler should start submitting requests into
-         * the leader's pipeline only when the leader's server is started, so we
-         * can submit the request directly into PrepRequestProcessor.
-         *
-         * This is done so that requests from learners won't go through
-         * LeaderRequestProcessor which perform local session upgrade.
-         */
-        prepRequestProcessor.processRequest(request);
-    }
-
-    @Override
-    protected void registerJMX() {
-        // register with JMX
-        try {
-            jmxDataTreeBean = new DataTreeBean(getZKDatabase().getDataTree());
-            MBeanRegistry.getInstance().register(jmxDataTreeBean, jmxServerBean);
-        } catch (Exception e) {
-            LOG.warn("Failed to register with JMX", e);
-            jmxDataTreeBean = null;
-        }
-    }
-
-    public void registerJMX(LeaderBean leaderBean, LocalPeerBean localPeerBean) {
-        // register with JMX
-        if (self.jmxLeaderElectionBean != null) {
-            try {
-                MBeanRegistry.getInstance().unregister(self.jmxLeaderElectionBean);
-            } catch (Exception e) {
-                LOG.warn("Failed to register with JMX", e);
-            }
-            self.jmxLeaderElectionBean = null;
-        }
-
-        try {
-            jmxServerBean = leaderBean;
-            MBeanRegistry.getInstance().register(leaderBean, localPeerBean);
-        } catch (Exception e) {
-            LOG.warn("Failed to register with JMX", e);
-            jmxServerBean = null;
-        }
-    }
-
-    boolean registerJMX(LearnerHandlerBean handlerBean) {
-        try {
-            MBeanRegistry.getInstance().register(handlerBean, jmxServerBean);
-            return true;
-        } catch (JMException e) {
-            LOG.warn("Could not register connection", e);
-        }
-        return false;
-    }
-
-    @Override
-    protected void unregisterJMX() {
-        // unregister from JMX
-        try {
-            if (jmxDataTreeBean != null) {
-                MBeanRegistry.getInstance().unregister(jmxDataTreeBean);
-            }
-        } catch (Exception e) {
-            LOG.warn("Failed to unregister with JMX", e);
-        }
-        jmxDataTreeBean = null;
-    }
-
-    protected void unregisterJMX(Leader leader) {
-        // unregister from JMX
-        try {
-            if (jmxServerBean != null) {
-                MBeanRegistry.getInstance().unregister(jmxServerBean);
-            }
-        } catch (Exception e) {
-            LOG.warn("Failed to unregister with JMX", e);
-        }
-        jmxServerBean = null;
-    }
-
-    @Override
-    public String getState() {
-        return "leader";
-    }
-
-    /**
-     * Returns the id of the associated QuorumPeer, which will do for a unique
-     * id of this server.
-     */
-    @Override
-    public long getServerId() {
-        return self.getMyId();
-    }
-
-    @Override
-    protected void revalidateSession(ServerCnxn cnxn, long sessionId, int sessionTimeout) throws IOException {
-        super.revalidateSession(cnxn, sessionId, sessionTimeout);
-        try {
-            // setowner as the leader itself, unless updated
-            // via the follower handlers
-            setOwner(sessionId, ServerCnxn.me);
-        } catch (SessionExpiredException e) {
-            // this is ok, it just means that the session revalidation failed.
-        }
-    }
-
-}