org.apache.flink.api.java.io

Class PrintingOutputFormat<T>

java.lang.Object

org.apache.flink.api.common.io.RichOutputFormat<T>

org.apache.flink.api.java.io.PrintingOutputFormat<T>

Type Parameters:

T - Input record type

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.io.OutputFormat<T>

@PublicEvolving
public class PrintingOutputFormat<T>
extends org.apache.flink.api.common.io.RichOutputFormat<T>

Output format that prints results into either stdout or stderr.

Four possible format options: sinkIdentifier:taskId> output <- sinkIdentifier provided, parallelism > 1 sinkIdentifier> output <- sinkIdentifier provided, parallelism == 1 taskId> output <- no sinkIdentifier provided, parallelism > 1 output <- no sinkIdentifier provided, parallelism == 1

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
PrintingOutputFormat() Instantiates a printing output format that prints to standard out.
PrintingOutputFormat(boolean stdErr) Instantiates a printing output format that prints to standard out.
PrintingOutputFormat(String sinkIdentifier, boolean stdErr) Instantiates a printing output format that prints to standard out with a prefixed message.

Method Summary

Modifier and Type	Method and Description
void	close()
void	configure(org.apache.flink.configuration.Configuration parameters)
void	open(int taskNumber, int numTasks)
String	toString()
void	writeRecord(T record)

Methods inherited from class org.apache.flink.api.common.io.RichOutputFormat

getRuntimeContext, setRuntimeContext

Methods inherited from class java.lang.Object

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

Constructor Detail

PrintingOutputFormat

public PrintingOutputFormat()

Instantiates a printing output format that prints to standard out.

PrintingOutputFormat

public PrintingOutputFormat(boolean stdErr)

Instantiates a printing output format that prints to standard out.

Parameters:

stdErr - True, if the format should print to standard error instead of standard out.

PrintingOutputFormat

public PrintingOutputFormat(String sinkIdentifier,
                            boolean stdErr)

Instantiates a printing output format that prints to standard out with a prefixed message.

Parameters:

sinkIdentifier - Message that is prefixed to the output of the value.

stdErr - True, if the format should print to standard error instead of standard out.

Method Detail

configure

public void configure(org.apache.flink.configuration.Configuration parameters)

open

public void open(int taskNumber,
                 int numTasks)

writeRecord

public void writeRecord(T record)

close

public void close()

toString

public String toString()

Overrides:

toString in class Object