Package org.apache.hadoop.hdfs.server.federation.store.driver

Class StateStoreSerializer

java.lang.Object

org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreSerializer

Direct Known Subclasses:

StateStoreSerializerPBImpl

public abstract class StateStoreSerializer
extends java.lang.Object

Serializer to store and retrieve data in the State Store.

Constructor Summary

Constructors

Constructor	Description
StateStoreSerializer()

Method Summary

Modifier and Type	Method	Description
abstract <T extends BaseRecord> T	deserialize(byte[] byteArray, java.lang.Class<T> clazz)	Deserialize a bytes array into a record.
abstract <T extends BaseRecord> T	deserialize(java.lang.String data, java.lang.Class<T> clazz)	Deserialize a string into a record.
static StateStoreSerializer	getSerializer()	Get the default serializer based.
static StateStoreSerializer	getSerializer(org.apache.hadoop.conf.Configuration conf)	Get a serializer based on the provided configuration.
static <T> T	newRecord(java.lang.Class<T> clazz)	Create a new record.
abstract <T> T	newRecordInstance(java.lang.Class<T> clazz)	Create a new record.
abstract byte[]	serialize(BaseRecord record)	Serialize a record into a byte array.
abstract java.lang.String	serializeString(BaseRecord record)	Serialize a record into a string.

Methods inherited from class java.lang.Object

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

Constructor Detail

StateStoreSerializer

public StateStoreSerializer()

Method Detail

getSerializer

public static StateStoreSerializer getSerializer()

Get the default serializer based.

Returns:

Singleton serializer.

getSerializer

public static StateStoreSerializer getSerializer(org.apache.hadoop.conf.Configuration conf)

Get a serializer based on the provided configuration.

Parameters:

conf - Configuration. Default if null.

Returns:

Singleton serializer.

newRecord

public static <T> T newRecord(java.lang.Class<T> clazz)

Create a new record.

Type Parameters:

T - Type of the record.

Parameters:

clazz - Class of the new record.

Returns:

New record.

newRecordInstance

public abstract <T> T newRecordInstance(java.lang.Class<T> clazz)

Create a new record.

Type Parameters:

T - Type of the record.

Parameters:

clazz - Class of the new record.

Returns:

New record.

serialize

public abstract byte[] serialize(BaseRecord record)

Serialize a record into a byte array.

Parameters:

record - Record to serialize.

Returns:

Byte array with the serialized record.

serializeString

public abstract java.lang.String serializeString(BaseRecord record)

Serialize a record into a string.

Parameters:

record - Record to serialize.

Returns:

String with the serialized record.

deserialize

public abstract <T extends BaseRecord> T deserialize(byte[] byteArray,
                                                     java.lang.Class<T> clazz)
                                              throws java.io.IOException

Deserialize a bytes array into a record.

Type Parameters:

T - Type of the record.

Parameters:

byteArray - Byte array to deserialize.

clazz - Class of the record.

Returns:

New record.

Throws:

java.io.IOException - If it cannot deserialize the record.

deserialize

public abstract <T extends BaseRecord> T deserialize(java.lang.String data,
                                                     java.lang.Class<T> clazz)
                                              throws java.io.IOException

Deserialize a string into a record.

Type Parameters:

T - Type of the record.

Parameters:

data - String with the data to deserialize.

clazz - Class of the record.

Returns:

New record.

Throws:

java.io.IOException - If it cannot deserialize the record.