JSON-RPC Protocol

A JSON-RPC Protocol is a remote procedure call protocol that enables distributed systems to exchange procedure calls using json format.

Context:
- It can establish Remote Communication through json messages.
- It can enable Method Invocation through request objects.
- It can support Result Handling through response objects.
- It can maintain Version Compatibility through protocol versions.
- It can handle Error States through error objects.
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- It can often implement Batch Processing through request arrays.
- It can often provide Notification Handling through notification objects.
- It can often facilitate Service Discovery through method listings.
- It can often support Session Management through connection tracking.
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- It can range from being a Simple JSON Message Protocol to being a Complex RPC Framework, depending on its implementation scope.
- It can range from being a Basic Data Exchange Protocol to being an Advanced Service Protocol, depending on its feature set.
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- It can integrate with Transport Layer for message delivery.
- It can connect to Application Layer for service integration.
- It can support Security Layer for message protection.
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Example(s):
- Protocol Versions, such as:
  - JSON-RPC 1.0 for basic rpc.
  - JSON-RPC 2.0 for advanced features.
- Transport Implementations, such as:
  - HTTP JSON-RPC for web services.
  - WebSocket JSON-RPC for real-time services.
  - TCP JSON-RPC for network services.
- Message Types, such as:
  - Request Message for procedure invocation.
  - Response Message for result delivery.
  - Notification Message for one-way communication.
- ...
Counter-Example(s):
- JSON REST Protocol, which uses resource-based architecture instead of procedure-based architecture.
- JSON Message Protocol, which lacks remote procedure call capabilities.
- JSON Schema Protocol, which validates data structures instead of executing procedures.
See: Remote Procedure Call, JSON Format, Network Protocol, API Protocol, Service Protocol.