Package org.apache.flink.runtime.util

Class StateHandleStoreUtils

java.lang.Object

org.apache.flink.runtime.util.StateHandleStoreUtils

public class StateHandleStoreUtils
extends Object

StateHandleStoreUtils collects utility methods that might be usefule for any StateHandleStore implementation.

Constructor Summary

Constructors

Constructor	Description
StateHandleStoreUtils()

Method Summary

Modifier and Type	Method	Description
static <T extends Serializable> T	deserialize(byte[] data)	Deserializes the passed data into a RetrievableStateHandle.
static byte[]	serializeOrDiscard(StateObject stateObject)	Serializes the passed StateObject and discards the state in case of failure.

Methods inherited from class java.lang.Object

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

Constructor Details

StateHandleStoreUtils

public StateHandleStoreUtils()

Method Details

serializeOrDiscard

public static byte[] serializeOrDiscard(StateObject stateObject)
                                 throws Exception

Serializes the passed StateObject and discards the state in case of failure.

Parameters:

stateObject - the StateObject that shall be serialized.

Returns:

The serialized version of the passed StateObject.

Throws:

Exception - if an error occurred during the serialization. The corresponding StateObject will be discarded in that case.

deserialize

public static <T extends Serializable> T deserialize(byte[] data)
                                              throws IOException,
ClassNotFoundException

Deserializes the passed data into a RetrievableStateHandle.

Type Parameters:

T - The type of data handled by the deserialized RetrievableStateHandle.

Parameters:

data - The data that shall be deserialized.

Returns:

The RetrievableStateHandle instance.

Throws:

IOException - Any of the usual Input/Output related exceptions.

ClassNotFoundException - If the data couldn't be deserialized into a RetrievableStateHandle referring to the expected type <T>.