org.apache.accumulo.server.util

Class CustomNonBlockingServer

java.lang.Object

org.apache.thrift.server.TServer

org.apache.thrift.server.AbstractNonblockingServer

org.apache.thrift.server.TNonblockingServer

org.apache.thrift.server.THsHaServer

org.apache.accumulo.server.util.CustomNonBlockingServer

public class CustomNonBlockingServer
extends org.apache.thrift.server.THsHaServer

This class implements a custom non-blocking thrift server, incorporating the THsHaServer features, and overriding the underlying TNonblockingServer methods, especially TNonblockingServer.SelectAcceptThread, in order to override the AbstractNonblockingServer.FrameBuffer and AbstractNonblockingServer.AsyncFrameBuffer with one that reveals the client address from its transport.

The justification for this is explained in https://issues.apache.org/jira/browse/ACCUMULO-1691, and is needed due to the repeated regressions:

• https://issues.apache.org/jira/browse/THRIFT-958
• https://issues.apache.org/jira/browse/THRIFT-1464
• https://issues.apache.org/jira/browse/THRIFT-2173

This class contains a copy of TNonblockingServer.SelectAcceptThread from Thrift 0.9.1, with the slight modification of instantiating a custom FrameBuffer, rather than the AbstractNonblockingServer.FrameBuffer and AbstractNonblockingServer.AsyncFrameBuffer. Because of this, any change in the implementation upstream will require a review of this implementation here, to ensure any new bugfixes/features in the upstream Thrift class are also applied here, at least until https://issues.apache.org/jira/browse/THRIFT-2173 is implemented. In the meantime, the maven-enforcer-plugin ensures that Thrift remains at version 0.9.1, which has been reviewed and tested.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.thrift.server.THsHaServer

org.apache.thrift.server.THsHaServer.Args

Nested classes/interfaces inherited from class org.apache.thrift.server.AbstractNonblockingServer

org.apache.thrift.server.AbstractNonblockingServer.AbstractNonblockingServerArgs<T extends org.apache.thrift.server.AbstractNonblockingServer.AbstractNonblockingServerArgs<T>>, org.apache.thrift.server.AbstractNonblockingServer.AbstractSelectThread, org.apache.thrift.server.AbstractNonblockingServer.AsyncFrameBuffer, org.apache.thrift.server.AbstractNonblockingServer.FrameBuffer

Nested classes/interfaces inherited from class org.apache.thrift.server.TServer

org.apache.thrift.server.TServer.AbstractServerArgs<T extends org.apache.thrift.server.TServer.AbstractServerArgs<T>>

Field Summary

Fields inherited from class org.apache.thrift.server.TServer

eventHandler_, inputProtocolFactory_, inputTransportFactory_, outputProtocolFactory_, outputTransportFactory_, processorFactory_, serverTransport_

Constructor Summary

Constructors

Constructor and Description
CustomNonBlockingServer(org.apache.thrift.server.THsHaServer.Args args)

Method Summary

Methods

Modifier and Type	Method and Description
protected Runnable	getRunnable(org.apache.thrift.server.AbstractNonblockingServer.FrameBuffer frameBuffer)
boolean	isStopped()
protected void	joinSelector()
protected boolean	startThreads()
void	stop()

Methods inherited from class org.apache.thrift.server.THsHaServer

createInvokerPool, gracefullyShutdownInvokerPool, requestInvoke, waitForShutdown

Methods inherited from class org.apache.thrift.server.AbstractNonblockingServer

serve, startListening, stopListening

Methods inherited from class org.apache.thrift.server.TServer

getEventHandler, isServing, setServerEventHandler, setServing

Methods inherited from class java.lang.Object

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

Constructor Detail

CustomNonBlockingServer

public CustomNonBlockingServer(org.apache.thrift.server.THsHaServer.Args args)

Method Detail

getRunnable

protected Runnable getRunnable(org.apache.thrift.server.AbstractNonblockingServer.FrameBuffer frameBuffer)

Overrides:

getRunnable in class org.apache.thrift.server.THsHaServer

startThreads

protected boolean startThreads()

Overrides:

startThreads in class org.apache.thrift.server.TNonblockingServer

stop

public void stop()

Overrides:

stop in class org.apache.thrift.server.TNonblockingServer

isStopped

public boolean isStopped()

Overrides:

isStopped in class org.apache.thrift.server.TNonblockingServer

joinSelector

protected void joinSelector()

Overrides:

joinSelector in class org.apache.thrift.server.TNonblockingServer