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  • All peers hold predefined messages schemas (described with java classes).
  • Messages follow schema in strict way - no fields are skipped and order of fields is guaranteed.
  • Peers send messages as byte stream serializing fields one by one, no delimiters are used between fields and messages.
  • For serializing POJO fields different techniques are used:
    • Message consumes already serialized byte array (e.g. JdkMarshaller for IgniteDiagnosticMessage, SchemaOperationStatusMessage... BinaryMarshaller for GridJobExecuteRequest#jobBytes).
    • User's BinaryObjects, Binarylizable are marshalled to byte array prior to serializing a message (the array is stored in cache structures).
    • Some messages contain POJO field annotated with GridDirectTransient, and additional byte array field fill with GridCacheMessage#prepareMarshal (e.g. BinaryMarshaller for GridChangeGlobalStateMessageResponse).

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