org.apache.cassandra.net
Class MessagingService

java.lang.Object
  extended by org.apache.cassandra.net.MessagingService
All Implemented Interfaces:
IFailureDetectionEventListener

public class MessagingService
extends java.lang.Object
implements IFailureDetectionEventListener


Field Summary
static java.lang.String responseStage_
           
static java.lang.String responseVerbHandler_
           
 
Constructor Summary
protected MessagingService()
           
 
Method Summary
 void addCallback(IAsyncCallback cb, java.lang.String messageId)
           
static int byteArrayToInt(byte[] bytes)
           
static int byteArrayToInt(byte[] bytes, int offset)
           
static short byteArrayToShort(byte[] bytes)
           
static short byteArrayToShort(byte[] bytes, int offset)
           
 java.lang.Object clone()
           
static java.nio.ByteBuffer constructStreamHeader(boolean compress, boolean stream)
           
 void convict(java.net.InetAddress ep)
          called by failure detection code to notify that housekeeping should be performed on downed sockets.
 void deregisterAllVerbHandlers(java.net.InetAddress localEndPoint)
          Deregister all verbhandlers corresponding to localEndPoint.
 void deregisterVerbHandlers(java.lang.String type)
          Deregister a verbhandler corresponding to the verb from the Messaging Service.
static IAsyncResult getAsyncResult(java.lang.String key)
           
static int getBits(int x, int p, int n)
           
static TcpConnection getConnection(java.net.InetAddress from, java.net.InetAddress to, Message msg)
           
static org.apache.cassandra.net.TcpConnectionManager getConnectionPool(java.net.InetAddress from, java.net.InetAddress to)
           
static java.util.concurrent.ExecutorService getDeserializationExecutor()
           
static java.util.concurrent.ExecutorService getReadExecutor()
           
static IAsyncCallback getRegisteredCallback(java.lang.String key)
           
 IVerbHandler getVerbHandler(java.lang.String type)
          This method returns the verb handler associated with the registered verb.
static int getVersion()
           
 byte[] hash(java.lang.String type, byte[] data)
           
static MessagingService instance()
           
static boolean isEqual(byte[] digestA, byte[] digestB)
           
static boolean isProtocolValid(byte[] protocol)
           
 void listen(java.net.InetAddress localEp)
          Listen on the specified port.
 void listenUDP(java.net.InetAddress localEp)
          Listen on the specified port.
static java.nio.ByteBuffer packIt(byte[] bytes, boolean compress, boolean stream)
           
static void receive(Message message)
           
 void registerVerbHandlers(java.lang.String type, IVerbHandler verbHandler)
          Register a verb and the corresponding verb handler with the Messaging Service.
static void removeRegisteredCallback(java.lang.String key)
           
 void sendOneWay(Message message, java.net.InetAddress to)
          Send a message to a given endpoint.
 java.lang.String sendRR(Message[] messages, java.net.InetAddress[] to, IAsyncCallback cb)
          Send a message to a given endpoint.
 IAsyncResult sendRR(Message message, java.net.InetAddress to)
           
 java.lang.String sendRR(Message message, java.net.InetAddress[] to, IAsyncCallback cb)
          Send a message to a given endpoint.
 java.lang.String sendRR(Message message, java.net.InetAddress to, IAsyncCallback cb)
          Send a message to a given endpoint.
 void sendUdpOneWay(Message message, java.net.InetAddress to)
          Send a message to a given endpoint.
static void shutdown()
           
 void stream(java.lang.String file, long startPosition, long total, java.net.InetAddress from, java.net.InetAddress to)
          Stream a file from source to destination.
static byte[] toByteArray(int i)
           
static byte[] toByteArray(short s)
           
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

responseVerbHandler_

public static final java.lang.String responseVerbHandler_
See Also:
Constant Field Values

responseStage_

public static final java.lang.String responseStage_
See Also:
Constant Field Values
Constructor Detail

MessagingService

protected MessagingService()
Method Detail

getVersion

public static int getVersion()

instance

public static MessagingService instance()

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException
Overrides:
clone in class java.lang.Object
Throws:
java.lang.CloneNotSupportedException

hash

public byte[] hash(java.lang.String type,
                   byte[] data)

convict

public void convict(java.net.InetAddress ep)
called by failure detection code to notify that housekeeping should be performed on downed sockets.

Specified by:
convict in interface IFailureDetectionEventListener
Parameters:
ep - endpoint to be convicted

listen

public void listen(java.net.InetAddress localEp)
            throws java.io.IOException
Listen on the specified port.

Parameters:
localEp - InetAddress whose port to listen on.
Throws:
java.io.IOException

listenUDP

public void listenUDP(java.net.InetAddress localEp)
Listen on the specified port.

Parameters:
localEp - InetAddress whose port to listen on.

getConnectionPool

public static org.apache.cassandra.net.TcpConnectionManager getConnectionPool(java.net.InetAddress from,
                                                                              java.net.InetAddress to)

getConnection

public static TcpConnection getConnection(java.net.InetAddress from,
                                          java.net.InetAddress to,
                                          Message msg)
                                   throws java.io.IOException
Throws:
java.io.IOException

registerVerbHandlers

public void registerVerbHandlers(java.lang.String type,
                                 IVerbHandler verbHandler)
Register a verb and the corresponding verb handler with the Messaging Service.

Parameters:
type - name of the verb.
verbHandler - handler for the specified verb

deregisterAllVerbHandlers

public void deregisterAllVerbHandlers(java.net.InetAddress localEndPoint)
Deregister all verbhandlers corresponding to localEndPoint.

Parameters:
localEndPoint -

deregisterVerbHandlers

public void deregisterVerbHandlers(java.lang.String type)
Deregister a verbhandler corresponding to the verb from the Messaging Service.

Parameters:
type - name of the verb.

getVerbHandler

public IVerbHandler getVerbHandler(java.lang.String type)
This method returns the verb handler associated with the registered verb. If no handler has been registered then null is returned.

Parameters:
type - for which the verb handler is sought
Returns:
a reference to IVerbHandler which is the handler for the specified verb

sendRR

public java.lang.String sendRR(Message message,
                               java.net.InetAddress[] to,
                               IAsyncCallback cb)
Send a message to a given endpoint.

Parameters:
message - message to be sent.
to - endpoint to which the message needs to be sent
Returns:
an reference to an IAsyncResult which can be queried for the response

addCallback

public void addCallback(IAsyncCallback cb,
                        java.lang.String messageId)

sendRR

public java.lang.String sendRR(Message message,
                               java.net.InetAddress to,
                               IAsyncCallback cb)
Send a message to a given endpoint. This method specifies a callback which is invoked with the actual response.

Parameters:
message - message to be sent.
to - endpoint to which the message needs to be sent
cb - callback interface which is used to pass the responses or suggest that a timeout occurred to the invoker of the send(). suggest that a timeout occurred to the invoker of the send().
Returns:
an reference to message id used to match with the result

sendRR

public java.lang.String sendRR(Message[] messages,
                               java.net.InetAddress[] to,
                               IAsyncCallback cb)
Send a message to a given endpoint. The ith element in the messages array is sent to the ith element in the to array.This method assumes there is a one-one mapping between the messages array and the to array. Otherwise an IllegalArgumentException will be thrown. This method also informs the MessagingService to wait for at least howManyResults responses to determine success of failure.

Parameters:
messages - messages to be sent.
to - endpoints to which the message needs to be sent
cb - callback interface which is used to pass the responses or suggest that a timeout occured to the invoker of the send().
Returns:
an reference to message id used to match with the result

sendOneWay

public void sendOneWay(Message message,
                       java.net.InetAddress to)
Send a message to a given endpoint. This method adheres to the fire and forget style messaging.

Parameters:
message - messages to be sent.
to - endpoint to which the message needs to be sent

sendRR

public IAsyncResult sendRR(Message message,
                           java.net.InetAddress to)

sendUdpOneWay

public void sendUdpOneWay(Message message,
                          java.net.InetAddress to)
Send a message to a given endpoint. This method adheres to the fire and forget style messaging.

Parameters:
message - messages to be sent.
to - endpoint to which the message needs to be sent

stream

public void stream(java.lang.String file,
                   long startPosition,
                   long total,
                   java.net.InetAddress from,
                   java.net.InetAddress to)
Stream a file from source to destination. This is highly optimized to not hold any of the contents of the file in memory.

Parameters:
file - name of file to stream.
startPosition - position inside the file
total - number of bytes to stream
to - endpoint to which we need to stream the file.

shutdown

public static void shutdown()

receive

public static void receive(Message message)

getRegisteredCallback

public static IAsyncCallback getRegisteredCallback(java.lang.String key)

removeRegisteredCallback

public static void removeRegisteredCallback(java.lang.String key)

getAsyncResult

public static IAsyncResult getAsyncResult(java.lang.String key)

getReadExecutor

public static java.util.concurrent.ExecutorService getReadExecutor()

getDeserializationExecutor

public static java.util.concurrent.ExecutorService getDeserializationExecutor()

isProtocolValid

public static boolean isProtocolValid(byte[] protocol)

isEqual

public static boolean isEqual(byte[] digestA,
                              byte[] digestB)

toByteArray

public static byte[] toByteArray(int i)

toByteArray

public static byte[] toByteArray(short s)

byteArrayToShort

public static short byteArrayToShort(byte[] bytes)

byteArrayToShort

public static short byteArrayToShort(byte[] bytes,
                                     int offset)

getBits

public static int getBits(int x,
                          int p,
                          int n)

byteArrayToInt

public static int byteArrayToInt(byte[] bytes)

byteArrayToInt

public static int byteArrayToInt(byte[] bytes,
                                 int offset)

packIt

public static java.nio.ByteBuffer packIt(byte[] bytes,
                                         boolean compress,
                                         boolean stream)

constructStreamHeader

public static java.nio.ByteBuffer constructStreamHeader(boolean compress,
                                                        boolean stream)


Copyright © 2010 The Apache Software Foundation