backtype.storm.multilang
Class JsonSerializer

java.lang.Object
  backtype.storm.multilang.JsonSerializer

All Implemented Interfaces:

ISerializer, Serializable

public class JsonSerializer
extends Object
implements ISerializer

JsonSerializer implements the JSON multilang protocol.

See Also:

Serialized Form

Constructor Summary

JsonSerializer()

Method Summary

Number	connect(Map conf, TopologyContext context) This method transmits the Storm config to the non-JVM process and receives its pid.
void	initialize(OutputStream processIn, InputStream processOut) This method sets the input and output streams of the serializer
ShellMsg	readShellMsg() This method receives a shell message from the non-JVM process
void	writeBoltMsg(BoltMsg boltMsg) This method sends a bolt message to a non-JVM bolt process
void	writeSpoutMsg(SpoutMsg msg) This method sends a spout message to a non-JVM spout process
void	writeTaskIds(List<Integer> taskIds) This method sends a list of task IDs to a non-JVM bolt process

Methods inherited from class java.lang.Object

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

Constructor Detail

JsonSerializer

public JsonSerializer()

Method Detail

initialize

public void initialize(OutputStream processIn,
                       InputStream processOut)

Description copied from interface: ISerializer

This method sets the input and output streams of the serializer

Specified by:

initialize in interface ISerializer

Parameters:

processIn - output stream to non-JVM component

processOut - input stream from non-JVM component

connect

public Number connect(Map conf,
                      TopologyContext context)
               throws IOException,
                      NoOutputException

Description copied from interface: ISerializer

This method transmits the Storm config to the non-JVM process and receives its pid.

Specified by:

connect in interface ISerializer

Parameters:

conf - storm configuration

context - topology context

Returns:

process pid

Throws:

IOException

NoOutputException

writeBoltMsg

public void writeBoltMsg(BoltMsg boltMsg)
                  throws IOException

Description copied from interface: ISerializer

This method sends a bolt message to a non-JVM bolt process

Specified by:

writeBoltMsg in interface ISerializer

Parameters:

boltMsg - bolt message

Throws:

IOException

writeSpoutMsg

public void writeSpoutMsg(SpoutMsg msg)
                   throws IOException

Description copied from interface: ISerializer

This method sends a spout message to a non-JVM spout process

Specified by:

writeSpoutMsg in interface ISerializer

Parameters:

msg - spout message

Throws:

IOException

writeTaskIds

public void writeTaskIds(List<Integer> taskIds)
                  throws IOException

Description copied from interface: ISerializer

This method sends a list of task IDs to a non-JVM bolt process

Specified by:

writeTaskIds in interface ISerializer

Parameters:

taskIds - list of task IDs

Throws:

IOException

readShellMsg

public ShellMsg readShellMsg()
                      throws IOException,
                             NoOutputException

Description copied from interface: ISerializer

This method receives a shell message from the non-JVM process

Specified by:

readShellMsg in interface ISerializer

Returns:

shell message

Throws:

IOException

NoOutputException