com.amazonaws.services.kinesis.producer

Class Daemon

java.lang.Object

com.amazonaws.services.kinesis.producer.Daemon

public class Daemon
extends Object

This class manages the child process. It takes cares of starting the process, connecting to it over TCP, and reading and writing messages from and to it through the socket.

Author:

chaodeng

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Daemon.MessageHandler Callback interface used by clients to receive messages and errors.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Daemon(File inPipe, File outPipe, Daemon.MessageHandler handler) Connect on existing pipes, without starting a child process.
	Daemon(String pathToExecutable, Daemon.MessageHandler handler, String workingDir, KinesisProducerConfiguration config, Map<String,String> environmentVariables) Starts up the child process, connects to it, and beings sending and receiving messages.

Method Summary

Modifier and Type	Method and Description
void	add(com.amazonaws.services.kinesis.producer.protobuf.Messages.Message m) Enqueue a message to be sent to the child process.
void	destroy() Immediately kills the child process and shuts down the threads in this Daemon.
Daemon.MessageHandler	getHandler()
File	getInPipe()
File	getOutPipe()
String	getPathToExecutable()
int	getQueueSize()
String	getWorkingDir()

Methods inherited from class java.lang.Object

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

Constructor Detail

Daemon

public Daemon(String pathToExecutable,
              Daemon.MessageHandler handler,
              String workingDir,
              KinesisProducerConfiguration config,
              Map<String,String> environmentVariables)

Starts up the child process, connects to it, and beings sending and receiving messages.

Parameters:

pathToExecutable - Path to the binary that we will use to start up the child.

handler - Message handler that handles messages received from the child.

workingDir - Working directory. The KPL creates FIFO files; it will do so in this directory.

config - KPL configuration.

Daemon

protected Daemon(File inPipe,
                 File outPipe,
                 Daemon.MessageHandler handler)

Connect on existing pipes, without starting a child process. For testing purposes.

Parameters:

inPipe - Pipe from which we read messages from the child.

outPipe - Pipe into which we write messages to the child.

handler - Message handler.

Method Detail

add

public void add(com.amazonaws.services.kinesis.producer.protobuf.Messages.Message m)

Enqueue a message to be sent to the child process.

Parameters:

m -

destroy

public void destroy()

Immediately kills the child process and shuts down the threads in this Daemon.

getInPipe

public File getInPipe()

getOutPipe

public File getOutPipe()

getPathToExecutable

public String getPathToExecutable()

getHandler

public Daemon.MessageHandler getHandler()

getWorkingDir

public String getWorkingDir()

getQueueSize

public int getQueueSize()