Serializing Data

All data moving out of the client cache must be serializable.

• Region Data Requiring Serialization

  Certain region types (including client regions) require serialization.

• Data Serialization Options

  The C++ client API provides two serialization options: the apache::geode::client::Serializable interface and GemFire PDX serialization.

• Serializing Data with PDX Serialization

  PDX is a cross-language data format that can reduce the cost of distributing and serializing your objects. PDX stores data in named fields that you can access individually to avoid the cost of deserializing the entire data object. When you use PDX serialization with a C++ client, you can register a PdxSerializer for the entire cache, implement PDX serialization for each domain object or use automatic PDX serialization by running the pdxautoserializer tool.

• Serializing Data with the Serializable Interface

  The C++ client API provides a Serializable interface that you can use for fast and compact data serialization. This section discusses the GemFire serializable interface, and presents implementation examples.

• Serializing Object Graphs

  If you have a graph of objects where each node can be serializable, the parent node can call DataOutput::writeObject to delegate the serialization responsibility to its child nodes. Similarly, your application can call DataInput::readObject to deserialize the object graph.

• Serializing and Accessing Data as a Blob

  If you have data that is best handled as a blob, such as structs that do not contain pointers, use the serializable type CacheableBytes . CacheableBytes is a blob class that implements the serialization for you.