- Add WebMvcStreamableServerTransportProvider with SSE support for streamable sessions
- Support GET, POST, DELETE endpoints for MCP protocol operations
- Implement thread-safe SSE operations using ReentrantLock in WebMvcSseServerTransportProvider
- Add test infrastructure with AbstractMcpClientServerIntegrationTests
- Refactor WebMvcStreamableIntegrationTests to use parameterized tests
- Support testing with both HttpClient and WebFlux transports
- Add streamable transport tests for both async and sync server modes
- Refactor existing WebMVC SSE integration tests to use shared test base
- Add error handling improvements in McpStreamableServerSession
- Update dependencies: add json-unit-assertj for enhanced JSON testing
- Reorganize POM dependencies and add mcp-spring-webflux test dependency
- Wrap handler invocations with Mono.defer for lazy evaluation
- Wrap consumer, tool, resource, prompt, and completion handler calls with Mono.defer()
- Ensures proper lazy evaluation and error handling in reactive streams
Related to #72
Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
Signed-off-by: Dariusz Jędrzejczyk <dariusz.jedrzejczyk@broadcom.com>
Co-authored-by: Dariusz Jędrzejczyk <dariusz.jedrzejczyk@broadcom.com>
- Add JsonSchemaValidator interface and DefaultJsonSchemaValidator implementation
- put the JsonSchemaValidator classes into a dedicated spec package
- add schema caching to DefaultJsonSchemaValidator for better performance
- Extend Tool schema to support outputSchema field for defining expected output structure
- Add structuredContent field to CallToolResult for validated structured responses
- Implement automatic validation of tool outputs against their defined schemas
- Add comprehensive test coverage for structured output validation scenarios
- Add json-schema-validator and json-unit-assertj dependencies for validation and testing
- Update McpServer builders to accept custom JsonSchemaValidator instances
- Ensure backward compatibility with existing tools without output schemas
This implements the MCP specification requirement that tools with output schemas
must provide structured results conforming to those schemas, with automatic
validation and error handling for non-conforming outputs.
https://modelcontextprotocol.io/specification/2025-06-18/server/tools#structured-content
Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
Before this fix the execution of the maven surefire
plugin with Java 21 logged warnings that mockito should be added as
a java agent, because the self-attaching won't be supported in future
java releases.
In Java 24 the test just broke.
This problem is solved by modifying the pom.xml of the parent and doing
this changes:
* Adding mockito as a java agent.
* Removing the surefireArgLine from the properties. This can be
added back when it's needed (for example when JaCoCo will be used).
Furthermore, the pom.xml in the mcp-spring-* modules now have
the byte-buddy dependency included, as the test would otherwise break
when trying to mock McpSchema#CreateMessageRequest.
Fixes#187
Co-authored-by: Dariusz Jędrzejczyk <dariusz.jedrzejczyk@broadcom.com>
