Package org.apache.hadoop.ipc

Class Server.Connection

java.lang.Object

org.apache.hadoop.ipc.Server.Connection

Enclosing class:

Server

public class Server.Connection
extends java.lang.Object

Reads calls from a connection and queues them for handling.

Field Summary

Fields

Modifier and Type	Field	Description
UserGroupInformation	attemptingUser

Constructor Summary

Constructors

Constructor	Description
Connection(java.nio.channels.SocketChannel channel, long lastContact, int ingressPort, boolean isOnAuxiliaryPort)

Method Summary

Modifier and Type	Method	Description
java.lang.String	getEstablishedQOP()
java.lang.String	getHostAddress()
java.net.InetAddress	getHostInetAddress()
int	getIngressPort()
long	getLastContact()
int	getRemotePort()
Server	getServer()
int	getServiceClass()	Get service class for connection
boolean	isOnAuxiliaryPort()
int	readAndProcess()	This method reads in a non-blocking fashion from the channel: this method is called repeatedly when data is present in the channel; when it has enough data to process one rpc it processes that rpc.
void	setLastContact(long lastContact)
void	setServiceClass(int serviceClass)	Set service class for connection
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

attemptingUser

public UserGroupInformation attemptingUser

Constructor Detail

Connection

public Connection(java.nio.channels.SocketChannel channel,
                  long lastContact,
                  int ingressPort,
                  boolean isOnAuxiliaryPort)

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getHostAddress

public java.lang.String getHostAddress()

getIngressPort

public int getIngressPort()

getRemotePort

public int getRemotePort()

getHostInetAddress

public java.net.InetAddress getHostInetAddress()

getEstablishedQOP

public java.lang.String getEstablishedQOP()

isOnAuxiliaryPort

public boolean isOnAuxiliaryPort()

setLastContact

public void setLastContact(long lastContact)

getLastContact

public long getLastContact()

getServer

public Server getServer()

readAndProcess

public int readAndProcess()
                   throws java.io.IOException,
                          java.lang.InterruptedException

This method reads in a non-blocking fashion from the channel: this method is called repeatedly when data is present in the channel; when it has enough data to process one rpc it processes that rpc. On the first pass, it processes the connectionHeader, connectionContext (an outOfBand RPC) and at most one RPC request that follows that. On future passes it will process at most one RPC request. Quirky things: dataLengthBuffer (4 bytes) is used to read "hrpc" OR rpc request length.

Returns:

-1 in case of error, else num bytes read so far

Throws:

java.io.IOException - - internal error that should not be returned to client, typically failure to respond to client

java.lang.InterruptedException - - if the thread is interrupted.

getServiceClass

public int getServiceClass()

Get service class for connection

Returns:

the serviceClass

setServiceClass

public void setServiceClass(int serviceClass)

Set service class for connection

Parameters:

serviceClass - the serviceClass to set