MetadataSerializer (Flink : Runtime 2.0.1 API)

All Superinterfaces:

org.apache.flink.core.io.Versioned

All Known Implementing Classes:

MetadataV1Serializer, MetadataV2Serializer, MetadataV3Serializer, MetadataV4Serializer, MetadataV5Serializer
```
public interface MetadataSerializer
extends org.apache.flink.core.io.Versioned
```
Deserializer for checkpoint metadata. Different deserializers exist to deserialize from different format versions.
Version-specific serializers are accessed via the MetadataSerializers helper.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`CheckpointMetadata`	`deserialize(DataInputStream dis, ClassLoader userCodeClassLoader, String externalPointer)`	Deserializes a savepoint from an input stream.
`void`	`serialize(CheckpointMetadata checkpointMetadata, DataOutputStream dos)`	Serializes a savepoint or checkpoint metadata to an output stream.

Methods inherited from interface org.apache.flink.core.io.Versioned
getVersion

- Method Detail
  - deserialize
```
CheckpointMetadata deserialize(DataInputStream dis,
                               ClassLoader userCodeClassLoader,
                               String externalPointer)
                        throws IOException
```
    Deserializes a savepoint from an input stream.
    
    Parameters:
    
    dis - Input stream to deserialize savepoint from
    
    userCodeClassLoader - the user code class loader
    
    externalPointer - the external pointer of the given checkpoint
    
    Returns:
    
    The deserialized savepoint
    
    Throws:
    
    IOException - Serialization failures are forwarded
  - serialize
```
void serialize(CheckpointMetadata checkpointMetadata,
               DataOutputStream dos)
        throws IOException
```
    Serializes a savepoint or checkpoint metadata to an output stream.
    
    Throws:
    
    IOException - Serialization failures are forwarded