84 lines
2.8 KiB
Scala
84 lines
2.8 KiB
Scala
/*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership.
|
|
* The ASF licenses this file to You under the Apache License, Version 2.0
|
|
* (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package spark
|
|
|
|
import java.io._
|
|
import java.nio.ByteBuffer
|
|
|
|
import serializer.{Serializer, SerializerInstance, DeserializationStream, SerializationStream}
|
|
import spark.util.ByteBufferInputStream
|
|
|
|
private[spark] class JavaSerializationStream(out: OutputStream) extends SerializationStream {
|
|
val objOut = new ObjectOutputStream(out)
|
|
def writeObject[T](t: T): SerializationStream = { objOut.writeObject(t); this }
|
|
def flush() { objOut.flush() }
|
|
def close() { objOut.close() }
|
|
}
|
|
|
|
private[spark] class JavaDeserializationStream(in: InputStream, loader: ClassLoader)
|
|
extends DeserializationStream {
|
|
val objIn = new ObjectInputStream(in) {
|
|
override def resolveClass(desc: ObjectStreamClass) =
|
|
Class.forName(desc.getName, false, loader)
|
|
}
|
|
|
|
def readObject[T](): T = objIn.readObject().asInstanceOf[T]
|
|
def close() { objIn.close() }
|
|
}
|
|
|
|
private[spark] class JavaSerializerInstance extends SerializerInstance {
|
|
def serialize[T](t: T): ByteBuffer = {
|
|
val bos = new ByteArrayOutputStream()
|
|
val out = serializeStream(bos)
|
|
out.writeObject(t)
|
|
out.close()
|
|
ByteBuffer.wrap(bos.toByteArray)
|
|
}
|
|
|
|
def deserialize[T](bytes: ByteBuffer): T = {
|
|
val bis = new ByteBufferInputStream(bytes)
|
|
val in = deserializeStream(bis)
|
|
in.readObject().asInstanceOf[T]
|
|
}
|
|
|
|
def deserialize[T](bytes: ByteBuffer, loader: ClassLoader): T = {
|
|
val bis = new ByteBufferInputStream(bytes)
|
|
val in = deserializeStream(bis, loader)
|
|
in.readObject().asInstanceOf[T]
|
|
}
|
|
|
|
def serializeStream(s: OutputStream): SerializationStream = {
|
|
new JavaSerializationStream(s)
|
|
}
|
|
|
|
def deserializeStream(s: InputStream): DeserializationStream = {
|
|
new JavaDeserializationStream(s, Thread.currentThread.getContextClassLoader)
|
|
}
|
|
|
|
def deserializeStream(s: InputStream, loader: ClassLoader): DeserializationStream = {
|
|
new JavaDeserializationStream(s, loader)
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A Spark serializer that uses Java's built-in serialization.
|
|
*/
|
|
class JavaSerializer extends Serializer {
|
|
def newInstance(): SerializerInstance = new JavaSerializerInstance
|
|
}
|