org.apache.flink.runtime.state

Class SerializedCheckpointData

java.lang.Object

org.apache.flink.runtime.state.SerializedCheckpointData

All Implemented Interfaces:

Serializable

public class SerializedCheckpointData
extends Object
implements Serializable

This class represents serialized checkpoint data for a collection of elements.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SerializedCheckpointData(long checkpointId, byte[] serializedData, int numIds) Creates a SerializedCheckpointData object for the given serialized data.

Method Summary

Modifier and Type	Method and Description
static <T> SerializedCheckpointData[]	fromDeque(ArrayDeque<org.apache.flink.api.java.tuple.Tuple2<Long,List<T>>> checkpoints, org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer) Converts a list of checkpoints with elements into an array of SerializedCheckpointData.
static <T> SerializedCheckpointData[]	fromDeque(ArrayDeque<org.apache.flink.api.java.tuple.Tuple2<Long,List<T>>> checkpoints, org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer, DataOutputSerializer outputBuffer) Converts a list of checkpoints into an array of SerializedCheckpointData.
long	getCheckpointId() Gets the checkpointId of the checkpoint.
int	getNumIds() Gets the number of IDs in the checkpoint.
byte[]	getSerializedData() Gets the binary data for the serialized elements.
static <T> ArrayDeque<org.apache.flink.api.java.tuple.Tuple2<Long,List<T>>>	toDeque(SerializedCheckpointData[] data, org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer) De-serializes an array of SerializedCheckpointData back into an ArrayDeque of element checkpoints.

Methods inherited from class java.lang.Object

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

Constructor Detail

SerializedCheckpointData

public SerializedCheckpointData(long checkpointId,
                                byte[] serializedData,
                                int numIds)

Creates a SerializedCheckpointData object for the given serialized data.

Parameters:

checkpointId - The checkpointId of the checkpoint.

serializedData - The serialized IDs in this checkpoint.

numIds - The number of IDs in the checkpoint.

Method Detail

getCheckpointId

public long getCheckpointId()

Gets the checkpointId of the checkpoint.

Returns:

The checkpointId of the checkpoint.

getSerializedData

public byte[] getSerializedData()

Gets the binary data for the serialized elements.

Returns:

The binary data for the serialized elements.

getNumIds

public int getNumIds()

Gets the number of IDs in the checkpoint.

Returns:

The number of IDs in the checkpoint.

fromDeque

public static <T> SerializedCheckpointData[] fromDeque(ArrayDeque<org.apache.flink.api.java.tuple.Tuple2<Long,List<T>>> checkpoints,
                                                       org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer)
                                                throws IOException

Converts a list of checkpoints with elements into an array of SerializedCheckpointData.

Type Parameters:

T - The type of the ID.

Parameters:

checkpoints - The checkpoints to be converted into IdsCheckpointData.

serializer - The serializer to serialize the IDs.

Returns:

An array of serializable SerializedCheckpointData, one per entry in the

Throws:

IOException - Thrown, if the serialization fails.

fromDeque

public static <T> SerializedCheckpointData[] fromDeque(ArrayDeque<org.apache.flink.api.java.tuple.Tuple2<Long,List<T>>> checkpoints,
                                                       org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer,
                                                       DataOutputSerializer outputBuffer)
                                                throws IOException

Converts a list of checkpoints into an array of SerializedCheckpointData.

Type Parameters:

T - The type of the ID.

Parameters:

checkpoints - The checkpoints to be converted into IdsCheckpointData.

serializer - The serializer to serialize the IDs.

outputBuffer - The reusable serialization buffer.

Returns:

An array of serializable SerializedCheckpointData, one per entry in the

Throws:

IOException - Thrown, if the serialization fails.

toDeque

public static <T> ArrayDeque<org.apache.flink.api.java.tuple.Tuple2<Long,List<T>>> toDeque(SerializedCheckpointData[] data,
                                                                                           org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer)
                                                                                    throws IOException

De-serializes an array of SerializedCheckpointData back into an ArrayDeque of element checkpoints.

Type Parameters:

T - The type of the elements.

Parameters:

data - The data to be deserialized.

serializer - The serializer used to deserialize the data.

Returns:

An ArrayDeque of element checkpoints.

Throws:

IOException - Thrown, if the serialization fails.