Package org.apache.storm.multilang
Class JsonSerializer
- java.lang.Object
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- org.apache.storm.multilang.JsonSerializer
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- All Implemented Interfaces:
Serializable,ISerializer
public class JsonSerializer extends Object implements ISerializer
JsonSerializer implements the JSON multilang protocol.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description static StringDEFAULT_CHARSET
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Constructor Summary
Constructors Constructor Description JsonSerializer()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Numberconnect(Map<String,Object> conf, TopologyContext context)This method transmits the Storm config to the non-JVM process and receives its pid.voidinitialize(OutputStream processIn, InputStream processOut)This method sets the input and output streams of the serializer.ShellMsgreadShellMsg()This method receives a shell message from the non-JVM process.voidwriteBoltMsg(BoltMsg boltMsg)This method sends a bolt message to a non-JVM bolt process.voidwriteSpoutMsg(SpoutMsg msg)This method sends a spout message to a non-JVM spout process.voidwriteTaskIds(List<Integer> taskIds)This method sends a list of task IDs to a non-JVM bolt process.
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Field Detail
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DEFAULT_CHARSET
public static final String DEFAULT_CHARSET
- See Also:
- Constant Field Values
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Method Detail
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initialize
public void initialize(OutputStream processIn, InputStream processOut)
Description copied from interface:ISerializerThis method sets the input and output streams of the serializer.- Specified by:
initializein interfaceISerializer- Parameters:
processIn- output stream to non-JVM componentprocessOut- input stream from non-JVM component
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connect
public Number connect(Map<String,Object> conf, TopologyContext context) throws IOException, NoOutputException
Description copied from interface:ISerializerThis method transmits the Storm config to the non-JVM process and receives its pid.- Specified by:
connectin interfaceISerializer- Parameters:
conf- storm configurationcontext- topology context- Returns:
- process pid
- Throws:
IOExceptionNoOutputException
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writeBoltMsg
public void writeBoltMsg(BoltMsg boltMsg) throws IOException
Description copied from interface:ISerializerThis method sends a bolt message to a non-JVM bolt process.- Specified by:
writeBoltMsgin interfaceISerializer- Parameters:
boltMsg- bolt message- Throws:
IOException
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writeSpoutMsg
public void writeSpoutMsg(SpoutMsg msg) throws IOException
Description copied from interface:ISerializerThis method sends a spout message to a non-JVM spout process.- Specified by:
writeSpoutMsgin interfaceISerializer- Parameters:
msg- spout message- Throws:
IOException
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writeTaskIds
public void writeTaskIds(List<Integer> taskIds) throws IOException
Description copied from interface:ISerializerThis method sends a list of task IDs to a non-JVM bolt process.- Specified by:
writeTaskIdsin interfaceISerializer- Parameters:
taskIds- list of task IDs- Throws:
IOException
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readShellMsg
public ShellMsg readShellMsg() throws IOException, NoOutputException
Description copied from interface:ISerializerThis method receives a shell message from the non-JVM process.- Specified by:
readShellMsgin interfaceISerializer- Returns:
- shell message
- Throws:
IOExceptionNoOutputException
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