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feat: Add Spring WebMVC streamable server transport provider (#425)

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- 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>
This commit is contained in:
Christian Tzolov 2025-07-30 14:38:16 +02:00 • committed by GitHub
commit 73515346ca
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1 changed files with 2410 additions and 1159 deletions
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15
mcp-spring/mcp-spring-webmvc/pom.xml
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@ -28,6 +28,12 @@
<version>0.11.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>io.modelcontextprotocol.sdk</groupId>
<artifactId>mcp-test</artifactId>
@ -35,10 +41,11 @@
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${springframework.version}</version>
<dependency>
<groupId>io.modelcontextprotocol.sdk</groupId>
<artifactId>mcp-spring-webflux</artifactId>
<version>0.11.0-SNAPSHOT</version>
<scope>test</scope>
</dependency>