package serializer
Type Members
- abstract class DeserializationStream extends Closeable
:: DeveloperApi :: A stream for reading serialized objects.
:: DeveloperApi :: A stream for reading serialized objects.
- Annotations
- @DeveloperApi()
- final class DummySerializerInstance extends SerializerInstance
Unfortunately, we need a serializer instance in order to construct a DiskBlockObjectWriter.
Unfortunately, we need a serializer instance in order to construct a DiskBlockObjectWriter. Our shuffle write path doesn't actually use this serializer (since we end up calling the
write() OutputStream methods), but DiskBlockObjectWriter still calls some methods on it. To work around this, we pass a dummy no-op serializer.- Annotations
- @Private()
- class JavaSerializer extends Serializer with Externalizable
:: DeveloperApi :: A Spark serializer that uses Java's built-in serialization.
:: DeveloperApi :: A Spark serializer that uses Java's built-in serialization.
- Annotations
- @DeveloperApi()
- Note
This serializer is not guaranteed to be wire-compatible across different versions of Spark. It is intended to be used to serialize/de-serialize data within a single Spark application.
- trait KryoRegistrator extends AnyRef
Interface implemented by clients to register their classes with Kryo when using Kryo serialization.
Interface implemented by clients to register their classes with Kryo when using Kryo serialization.
- Annotations
- @DeveloperApi()
- class KryoSerializer extends Serializer with Logging with Serializable
A Spark serializer that uses the Kryo serialization library.
A Spark serializer that uses the Kryo serialization library.
- Note
This serializer is not guaranteed to be wire-compatible across different versions of Spark. It is intended to be used to serialize/de-serialize data within a single Spark application.
- abstract class SerializationStream extends Closeable
:: DeveloperApi :: A stream for writing serialized objects.
:: DeveloperApi :: A stream for writing serialized objects.
- Annotations
- @DeveloperApi()
- abstract class Serializer extends AnyRef
:: DeveloperApi :: A serializer.
:: DeveloperApi :: A serializer. Because some serialization libraries are not thread safe, this class is used to create org.apache.spark.serializer.SerializerInstance objects that do the actual serialization and are guaranteed to only be called from one thread at a time.
Implementations of this trait should implement:
1. a zero-arg constructor or a constructor that accepts a org.apache.spark.SparkConf as parameter. If both constructors are defined, the latter takes precedence.
2. Java serialization interface.
- Annotations
- @DeveloperApi()
- Note
Serializers are not required to be wire-compatible across different versions of Spark. They are intended to be used to serialize/de-serialize data within a single Spark application.
- abstract class SerializerInstance extends AnyRef
:: DeveloperApi :: An instance of a serializer, for use by one thread at a time.
:: DeveloperApi :: An instance of a serializer, for use by one thread at a time.
It is legal to create multiple serialization / deserialization streams from the same SerializerInstance as long as those streams are all used within the same thread.
- Annotations
- @DeveloperApi() @NotThreadSafe()