org.apache.zookeeper.server.quorum

Class QuorumZooKeeperServer

java.lang.Object

org.apache.zookeeper.server.ZooKeeperServer

org.apache.zookeeper.server.quorum.QuorumZooKeeperServer

All Implemented Interfaces:

ServerStats.Provider, SessionTracker.SessionExpirer

Direct Known Subclasses:

LeaderZooKeeperServer, LearnerZooKeeperServer

public abstract class QuorumZooKeeperServer
extends ZooKeeperServer

Abstract base class for all ZooKeeperServers that participate in a quorum.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.zookeeper.server.ZooKeeperServer

ZooKeeperServer.MissingSessionException, ZooKeeperServer.State

Field Summary

Fields

Modifier and Type	Field and Description
QuorumPeer	self
protected UpgradeableSessionTracker	upgradeableSessionTracker

Fields inherited from class org.apache.zookeeper.server.ZooKeeperServer

ALLOW_SASL_FAILED_CLIENTS, CLOSE_SESSION_TXN_ENABLED, DEFAULT_STARTING_BUFFER_SIZE, DEFAULT_TICK_TIME, ENABLE_EAGER_ACL_CHECK, firstProcessor, GET_CHILDREN_RESPONSE_CACHE_SIZE, GET_DATA_RESPONSE_CACHE_SIZE, GLOBAL_OUTSTANDING_LIMIT, initialConfig, INT_BUFFER_STARTING_SIZE_BYTES, intBufferStartingSizeBytes, jmxDataTreeBean, jmxServerBean, jvmPauseMonitor, listenBacklog, LOG, maxSessionTimeout, minSessionTimeout, ok, reconfigEnabled, SASL_AUTH_SCHEME, secureServerCnxnFactory, serverCnxnFactory, SESSION_REQUIRE_CLIENT_SASL_AUTH, sessionTracker, SKIP_ACL, SNAP_COUNT, state, tickTime, ZOOKEEPER_DIGEST_ENABLED

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	QuorumZooKeeperServer(FileTxnSnapLog logFactory, int tickTime, int minSessionTimeout, int maxSessionTimeout, int listenBacklog, ZKDatabase zkDb, QuorumPeer self)

Method Summary

Modifier and Type	Method and Description
Request	checkUpgradeSession(Request request)
void	dumpConf(PrintWriter pwriter)
void	dumpMonitorValues(BiConsumer<String,Object> response) Hook into admin server, useful to expose additional data that do not represent metrics.
protected void	registerMetrics()
protected void	setLocalSessionFlag(Request si) If the underlying Zookeeper server support local session, this method will set a isLocalSession to true if a request is associated with a local session.
protected void	setState(ZooKeeperServer.State state) Sets the state of ZooKeeper server.
protected void	startSessionTracker()
protected void	unregisterMetrics()
void	upgrade(long sessionId) Implements the SessionUpgrader interface,

Methods inherited from class org.apache.zookeeper.server.ZooKeeperServer

authWriteRequest, canShutdown, checkACL, checkPasswd, checkRequestSizeWhenReceivingMessage, closeSession, closeSession, connThrottle, createSessionTracker, decInProcess, dumpEphemerals, enqueueRequest, expire, finishSessionInit, getClientPort, getClientPortListenBacklog, getConf, getConnectionDropChance, getDataDirSize, getEphemerals, getGetChildrenResponseCache, getGlobalOutstandingLimit, getInflight, getInitialConfig, getInProcess, getLargeRequestBytes, getLargeRequestMaxBytes, getLargeRequestThreshold, getLastProcessedZxid, getLogDirSize, getMaxClientCnxnsPerHost, getMaxSessionTimeout, getMinSessionTimeout, getNumAliveConnections, getOutstandingHandshakeNum, getOutstandingRequests, getReadResponseCache, getRequestPathMetricsCollector, getSecureClientPort, getSecureServerCnxnFactory, getServerCnxnFactory, getServerId, getSessionExpiryMap, getSessionTracker, getSnapCount, getSnapSizeInBytes, getState, getTickTime, getTxnLogElapsedSyncTime, getTxnLogFactory, getZKDatabase, getZooKeeperServerListener, getZxid, incInProcess, isCloseSessionTxnEnabled, isDigestEnabled, isReconfigEnabled, isResponseCachingEnabled, isRunning, killSession, loadData, processConnectRequest, processPacket, processTxn, processTxn, registerJMX, reopenSession, requestFinished, revalidateSession, serverStats, setClientPortListenBacklog, setCloseSessionTxnEnabled, setCreateSessionTrackerServerId, setDigestEnabled, setLargeRequestMaxBytes, setLargeRequestThreshold, setMaxSessionTimeout, setMinSessionTimeout, setOwner, setResponseCachingEnabled, setSecureServerCnxnFactory, setServerCnxnFactory, setTickTime, setTxnLogFactory, setupRequestProcessors, setZKDatabase, setZxid, shouldThrottle, shutdown, shutdown, startdata, startJvmPauseMonitor, startRequestThrottler, startServing, startup, startupWithoutServing, submitRequest, submitRequestNow, takeSnapshot, takeSnapshot, truncateLog, unregisterJMX

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

self

public final QuorumPeer self

upgradeableSessionTracker

protected UpgradeableSessionTracker upgradeableSessionTracker

Constructor Detail

QuorumZooKeeperServer

protected QuorumZooKeeperServer(FileTxnSnapLog logFactory,
                                int tickTime,
                                int minSessionTimeout,
                                int maxSessionTimeout,
                                int listenBacklog,
                                ZKDatabase zkDb,
                                QuorumPeer self)

Method Detail

startSessionTracker

protected void startSessionTracker()

Overrides:

startSessionTracker in class ZooKeeperServer

checkUpgradeSession

public Request checkUpgradeSession(Request request)
                            throws IOException,
                                   KeeperException

Throws:

IOException

KeeperException

upgrade

public void upgrade(long sessionId)

Implements the SessionUpgrader interface,

Parameters:

sessionId -

setLocalSessionFlag

protected void setLocalSessionFlag(Request si)

Description copied from class: ZooKeeperServer

If the underlying Zookeeper server support local session, this method will set a isLocalSession to true if a request is associated with a local session.

Overrides:

setLocalSessionFlag in class ZooKeeperServer

dumpConf

public void dumpConf(PrintWriter pwriter)

Overrides:

dumpConf in class ZooKeeperServer

setState

protected void setState(ZooKeeperServer.State state)

Description copied from class: ZooKeeperServer

Sets the state of ZooKeeper server. After changing the state, it notifies the server state change to a registered shutdown handler, if any.

The following are the server state transitions:

• During startup the server will be in the INITIAL state.
• After successfully starting, the server sets the state to RUNNING.
• The server transitions to the ERROR state if it hits an internal error. ZooKeeperServerListenerImpl notifies any critical resource error events, e.g., SyncRequestProcessor not being able to write a txn to disk.
• During shutdown the server sets the state to SHUTDOWN, which corresponds to the server not running.

Overrides:

setState in class ZooKeeperServer

Parameters:

state - new server state.

registerMetrics

protected void registerMetrics()

Overrides:

registerMetrics in class ZooKeeperServer

unregisterMetrics

protected void unregisterMetrics()

Overrides:

unregisterMetrics in class ZooKeeperServer

dumpMonitorValues

public void dumpMonitorValues(BiConsumer<String,Object> response)

Description copied from class: ZooKeeperServer

Hook into admin server, useful to expose additional data that do not represent metrics.

Overrides:

dumpMonitorValues in class ZooKeeperServer

Parameters:

response - a sink which collects the data.