Package org.apache.zookeeper.server
Class NIOServerCnxn
- java.lang.Object
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- org.apache.zookeeper.server.ServerCnxn
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- org.apache.zookeeper.server.NIOServerCnxn
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- All Implemented Interfaces:
ServerWatcher,Watcher
- Direct Known Subclasses:
ControllableConnection
public class NIOServerCnxn extends ServerCnxn
This class handles communication with clients using NIO. There is one per client, but only one thread doing the communication.
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.zookeeper.server.ServerCnxn
ServerCnxn.CloseRequestException, ServerCnxn.DisconnectReason, ServerCnxn.EndOfStreamException
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Nested classes/interfaces inherited from interface org.apache.zookeeper.Watcher
Watcher.Event, Watcher.WatcherType
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Field Summary
Fields Modifier and Type Field Description protected ByteBufferincomingBuffer-
Fields inherited from class org.apache.zookeeper.server.ServerCnxn
count, disconnectReason, established, lastCxid, lastLatency, lastOp, lastResponseTime, lastZxid, maxLatency, me, minLatency, packetsReceived, packetsSent, protocolManager, totalLatency, zooKeeperSaslServer
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Constructor Summary
Constructors Constructor Description NIOServerCnxn(ZooKeeperServer zk, SocketChannel sock, SelectionKey sk, NIOServerCnxnFactory factory, NIOServerCnxnFactory.SelectorThread selectorThread)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description voidclose(ServerCnxn.DisconnectReason reason)Close the cnxn and remove it from the factory cnxns list.static voidcloseSock(SocketChannel sock)Close resources associated with a sock.voiddisableRecv(boolean waitDisableRecv)voiddisableSelectable()voidenableRecv()voidenableSelectable()Certificate[]getClientCertificateChain()intgetInterestOps()InetSocketAddressgetRemoteSocketAddress()longgetSessionId()intgetSessionTimeout()InetAddressgetSocketAddress()booleanisSecure()booleanisSelectable()protected booleanisSocketOpen()Only used in order to allow testingvoidprocess(WatchedEvent event, List<ACL> znodeAcl)protected voidreadRequest()voidsendBuffer(ByteBuffer... buffers)sendBuffer pushes a byte buffer onto the outgoing buffer queue for asynchronous writes.voidsendCloseSession()intsendResponse(ReplyHeader h, Record r, String tag, String cacheKey, Stat stat, int opCode)Serializes a ZooKeeper response and enqueues it for sending.protected ServerStatsserverStats()voidsetClientCertificateChain(Certificate[] chain)voidsetSessionId(long sessionId)voidsetSessionTimeout(int sessionTimeout)StringtoString()Used by "dump" 4-letter command to list all connection in cnxnExpiryMap-
Methods inherited from class org.apache.zookeeper.server.ServerCnxn
addAuthInfo, cleanupWriterSocket, decrOutstandingAndCheckThrottle, dumpConnectionInfo, getAuthInfo, getAvgLatency, getConnectionInfo, getEstablished, getHostAddress, getLastCxid, getLastLatency, getLastOperation, getLastResponseTime, getLastZxid, getMaxLatency, getMinLatency, getOutstandingRequests, getPacketsReceived, getPacketsSent, getSessionIdHex, incrOutstandingAndCheckThrottle, incrPacketsReceived, incrPacketsSent, isInvalid, isStale, isZKServerRunning, packetReceived, packetSent, process, removeAuthInfo, resetStats, sendResponse, serialize, serializeRecord, setInvalid, setStale, updateStatsForResponse
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Field Detail
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incomingBuffer
protected ByteBuffer incomingBuffer
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Constructor Detail
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NIOServerCnxn
public NIOServerCnxn(ZooKeeperServer zk, SocketChannel sock, SelectionKey sk, NIOServerCnxnFactory factory, NIOServerCnxnFactory.SelectorThread selectorThread) throws IOException
- Throws:
IOException
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Method Detail
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sendCloseSession
public void sendCloseSession()
- Specified by:
sendCloseSessionin classServerCnxn
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sendBuffer
public void sendBuffer(ByteBuffer... buffers)
sendBuffer pushes a byte buffer onto the outgoing buffer queue for asynchronous writes.
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isSelectable
public boolean isSelectable()
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disableSelectable
public void disableSelectable()
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enableSelectable
public void enableSelectable()
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isSocketOpen
protected boolean isSocketOpen()
Only used in order to allow testing
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readRequest
protected void readRequest() throws IOException- Throws:
IOException
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disableRecv
public void disableRecv(boolean waitDisableRecv)
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enableRecv
public void enableRecv()
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getSessionTimeout
public int getSessionTimeout()
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toString
public String toString()
Used by "dump" 4-letter command to list all connection in cnxnExpiryMap- Overrides:
toStringin classServerCnxn- See Also:
for brief stats
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close
public void close(ServerCnxn.DisconnectReason reason)
Close the cnxn and remove it from the factory cnxns list.- Specified by:
closein classServerCnxn
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closeSock
public static void closeSock(SocketChannel sock)
Close resources associated with a sock.
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sendResponse
public int sendResponse(ReplyHeader h, Record r, String tag, String cacheKey, Stat stat, int opCode)
Description copied from class:ServerCnxnSerializes a ZooKeeper response and enqueues it for sending. Serializes client response parts and enqueues them into outgoing queue. If both cache key and last modified zxid are provided, the serialized response is caŃhed under the provided key, the last modified zxid is stored along with the value. A cache entry is invalidated if the provided last modified zxid is more recent than the stored one. Attention: this function is not thread safe, due to caching not being thread safe.- Specified by:
sendResponsein classServerCnxn- Parameters:
h- reply headerr- reply payload, can be nulltag- Jute serialization tag, can be nullcacheKey- Key for caching the serialized payload. A null value prevents caching.stat- Stat information for the the reply payload, used for cache invalidation. A value of 0 prevents caching.opCode- The op code appertains to the corresponding request of the response, used to decide which cache (e.g. read response cache, list of children response cache, ...) object to look up to when applicable.
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process
public void process(WatchedEvent event, List<ACL> znodeAcl)
- Specified by:
processin interfaceServerWatcher- Specified by:
processin classServerCnxn
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getSessionId
public long getSessionId()
- Specified by:
getSessionIdin classServerCnxn
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setSessionId
public void setSessionId(long sessionId)
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setSessionTimeout
public void setSessionTimeout(int sessionTimeout)
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getInterestOps
public int getInterestOps()
- Specified by:
getInterestOpsin classServerCnxn
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getRemoteSocketAddress
public InetSocketAddress getRemoteSocketAddress()
- Specified by:
getRemoteSocketAddressin classServerCnxn
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getSocketAddress
public InetAddress getSocketAddress()
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serverStats
protected ServerStats serverStats()
- Specified by:
serverStatsin classServerCnxn
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isSecure
public boolean isSecure()
- Specified by:
isSecurein classServerCnxn
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getClientCertificateChain
public Certificate[] getClientCertificateChain()
- Specified by:
getClientCertificateChainin classServerCnxn
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setClientCertificateChain
public void setClientCertificateChain(Certificate[] chain)
- Specified by:
setClientCertificateChainin classServerCnxn
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