org.apache.flink.api.java

Class Utils.ChecksumHashCodeHelper<T>

java.lang.Object

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

org.apache.flink.api.java.Utils.ChecksumHashCodeHelper<T>

Type Parameters:

T -

All Implemented Interfaces:

Serializable, OutputFormat<T>

Enclosing class:

Utils

public static class Utils.ChecksumHashCodeHelper<T>
extends RichOutputFormat<T>

RichOutputFormat for Utils.ChecksumHashCode.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.api.common.io.OutputFormat

OutputFormat.InitializationContext

Constructor Summary

Constructors

Constructor and Description
ChecksumHashCodeHelper(String id)

Method Summary

Modifier and Type	Method and Description
void	close() Method that marks the end of the life-cycle of parallel output instance.
void	configure(Configuration parameters) Configures this output format.
void	open(OutputFormat.InitializationContext context) Opens a parallel instance of the output format to store the result of its parallel instance.
void	writeRecord(T record) Adds a record to the output.

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, toString, wait, wait, wait

Constructor Detail

ChecksumHashCodeHelper

public ChecksumHashCodeHelper(String id)

Method Detail

configure

public void configure(Configuration parameters)

Description copied from interface: OutputFormat

Configures this output format. Since output formats are instantiated generically and hence parameterless, this method is the place where the output formats set their basic fields based on configuration values.

This method is always called first on a newly instantiated output format.

Parameters:

parameters - The configuration with all parameters.

open

public void open(OutputFormat.InitializationContext context)

Description copied from interface: OutputFormat

Opens a parallel instance of the output format to store the result of its parallel instance.

When this method is called, the output format it guaranteed to be configured.

Parameters:

context - The context to get task parallel infos.

writeRecord

public void writeRecord(T record)
                 throws IOException

Description copied from interface: OutputFormat

Adds a record to the output.

When this method is called, the output format it guaranteed to be opened.

Parameters:

record - The records to add to the output.

Throws:

IOException - Thrown, if the records could not be added due to an I/O problem.

close

public void close()
           throws IOException

Description copied from interface: OutputFormat

Method that marks the end of the life-cycle of parallel output instance. Should be used to close channels and streams and release resources. After this method returns without an error, the output is assumed to be correct.

When this method is called, the output format it guaranteed to be opened.

Throws:

IOException - Thrown, if the input could not be closed properly.