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6.2. Protobuf Encoding
The Infinispan Query DSL can be used remotely via the Hot Rod client. In order to do this, protocol buffers are used to adopt a common format for storing cache entries and marshalling them.
For more information, see https://developers.google.com/protocol-buffers/docs/overview
6.2.1. Storing Protobuf Encoded Entities
Protobuf requires data to be structured. This is achieved by declaring Protocol Buffer message types in
.proto files
For example:
Example 6.1. .library.proto
package book_sample;
message Book {
required string title = 1;
required string description = 2;
required int32 publicationYear = 3; // no native Date type available in Protobuf
repeated Author authors = 4;
}
message Author {
required string name = 1;
required string surname = 2;
}
The provided example:
- An entity named
Bookis placed in a package namedbook_sample.package book_sample; message Book { - The entity declares several fields of primitive types and a repeatable field named
authors.required string title = 1; required string description = 2; required int32 publicationYear = 3; // no native Date type available in Protobuf repeated Author authors = 4; } - The
Authormessage instances are embedded in theBookmessage instance.message Author { required string name = 1; required string surname = 2; }
