Package org.infinispan.commons.marshall

Interface Marshaller

All Known Subinterfaces:
PersistenceMarshaller, StreamingMarshaller
All Known Implementing Classes:
AbstractJBossMarshaller, AbstractMarshaller, BytesOnlyMarshaller, GenericJBossMarshaller, GlobalMarshaller, HotRodEntryMarshaller, IdentityMarshaller, ImmutableProtoStreamMarshaller, JavaSerializationMarshaller, JBossMarshaller, JBossUserMarshaller, ProtoStreamMarshaller, ProtoStreamMarshaller, StringMarshaller, UTF8StringMarshaller
@ThreadSafe public interface Marshaller
A marshaller is a class that is able to marshall and unmarshall objects efficiently.

This interface is used to marshall ReplicableCommands, their parameters and their response values, as well as any other arbitrary Object ↔ byte[] conversions, such as those used in client/server communications.

A single instance of any implementation is shared by multiple threads, so implementations need to be threadsafe, and preferably immutable.

Version:
4.1
Author:
Manik Surtani

  • Method Details

    • initialize

      default void initialize(ClassAllowList classAllowList)
      An optional method which allows an implementation to respect the ClassAllowList associated with the context, for example the EmbeddedCacheManager or RemoteCacheManager.

    • objectToByteBuffer

      byte[] objectToByteBuffer(Object obj, int estimatedSize) throws IOException, InterruptedException
      Marshalls an object to a byte array. The estimatedSize parameter is a hint that can be passed in to allow for efficient sizing of the byte array before attempting to marshall the object. The more accurate this estimate is, the less likely byte[]s will need to be resized to hold the byte stream generated by marshalling the object.
      Parameters:
      obj - object to convert to a byte array. Must not be null.
      estimatedSize - an estimate of how large the resulting byte array may be
      Returns:
      a byte array with the marshalled form of the object
      Throws:
      IOException - if marshalling cannot complete due to some I/O error
      InterruptedException - if the marshalling was interrupted. Clients should take this as a sign that the marshaller is no longer available, maybe due to shutdown, and so no more unmarshalling should be attempted.

    • objectToByteBuffer

      byte[] objectToByteBuffer(Object obj) throws IOException, InterruptedException
      Marshalls an object to a byte array.
      Parameters:
      obj - object to convert to a byte array. Must not be null.
      Returns:
      a byte array
      Throws:
      IOException - if marshalling cannot complete due to some I/O error
      InterruptedException - if the marshalling process was interrupted. Clients should take this as a sign that the marshaller is no longer available, maybe due to shutdown, and so no more marshalling should be attempted.

    • objectFromByteBuffer

      Object objectFromByteBuffer(byte[] buf) throws IOException, ClassNotFoundException
      Unmarshalls an object from a byte array.
      Parameters:
      buf - byte array containing the binary representation of an object. Must not be null.
      Returns:
      an object
      Throws:
      IOException - if unmarshalling cannot complete due to some I/O error
      ClassNotFoundException - if the class of the object trying to unmarshall is unknown

    • objectFromByteBuffer

      Object objectFromByteBuffer(byte[] buf, int offset, int length) throws IOException, ClassNotFoundException
      Unmarshalls an object from a specific portion of a byte array.
      Parameters:
      buf - byte array containing the binary representation of an object. Must not be null.
      offset - point in buffer to start reading
      length - number of bytes to consider
      Returns:
      an object
      Throws:
      IOException - if unmarshalling cannot complete due to some I/O error
      ClassNotFoundException - if the class of the object trying to unmarshall is unknown

    • objectToBuffer

      ByteBuffer objectToBuffer(Object o) throws IOException, InterruptedException
      A method that returns an instance of ByteBuffer, which allows direct access to the byte array with minimal array copying
      Parameters:
      o - object to marshall
      Throws:
      IOException - if marshalling cannot complete due to some I/O error
      InterruptedException - if the marshalling process was interrupted. Clients should take this as a sign that the marshaller is no longer available, maybe due to shutdown, and so no more marshalling should be attempted.

    • isMarshallable

      boolean isMarshallable(Object o) throws Exception
      A method that checks whether the given object is marshallable as per the rules of this marshaller.
      Parameters:
      o - object to verify whether it's marshallable or not
      Returns:
      true if the object is marshallable, otherwise false
      Throws:
      Exception - if while checking whether the object was serializable or not, an exception arose

    • getBufferSizePredictor

      BufferSizePredictor getBufferSizePredictor(Object o)
      Returns a marshalled payload size predictor for a particular type. Accurate prediction of a type's serialized payload size helps avoid unnecessary copying and speeds up application performance.
      Parameters:
      o - Object for which serialized predictor will be returned
      Returns:
      an instance of BufferSizePredictor
      Throws:
      NullPointerException - if o is null

    • mediaType

      MediaType mediaType()
      Returns:
      the MediaType associated with the content produced by the marshaller

    • start

      default void start()
      Perform any initialization required before the marshaller is used.

    • stop

      default void stop()
      Stop the marshaller. Implementations of this method should clear up any cached data, or close any resources while marshalling/unmarshalling that have not been already closed.