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| content_type | title | chapter | label | version | date | published |
|---|---|---|---|---|---|---|
| doc_shard | Envelopes | envelope | envelopes | 1.0 | 08.02.2016 | true |
The DataForge functionality is largely based on metadata exchange and therefore the main medium for messages between different parts of the system is Meta object and its derivatives. But sometimes one needs not only to transfer metadata but some binary or object data as well. For this DataForge supports an 'Envelope' entity, which contains both meta block and binary data block. Envelope could be automatically serialized to or from a byte stream.
DataForge supports an extensible list of Envelope encoding methods. Specific method is defined by so-called encoding properties - the list of key-value pairs that define the specific way the meta and data are encoded. Meta-data itself also could have different encoding. Out of the box DataForge server supports two envelope formats and three meta formats.