StateHandleStoreUtils (Flink : Runtime 2.1.0 API)

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

All Methods Static Methods Concrete Methods
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 Detail
  - StateHandleStoreUtils
```
public StateHandleStoreUtils()
```
- Method Detail
  - 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>.