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feat: add Streamable HTTP Server abstractions and implement WebFlux transport provider (#420)

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- Add WebFluxStreamableServerTransportProvider for streamable HTTP sessions
- Add WebFluxStatelessServerTransport for stateless HTTP MCP servers
  - Add McpStatelessServerFeatures, McpStatelessServerHandler, McpStatelessRequestHandler, McpStatelessNotificationHandler
- Refactor server architecture to support multiple transport categories:
   streamable, single-session, stateless
- Introduce McpTransportContext for transport-level metadata extraction
- Add session management capabilities for streamable HTTP connections
- Update MCP protocol version to 2025-03-26
- Add test coverage for new transport implementations
- Implement integration tests for both stateless and streamable transports

Signed-off-by: Dariusz Jędrzejczyk <dariusz.jedrzejczyk@broadcom.com>
Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
Co-authored-by: Christian Tzolov <christian.tzolov@broadcom.com>
This commit is contained in:
Dariusz Jędrzejczyk 2025-07-30 13:41:18 +02:00 • committed by GitHub
commit a8f5a3fb4f
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2 changed files with 6578 additions and 704 deletions
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8
mcp-spring/mcp-spring-webmvc/src/test/java/io/modelcontextprotocol/server/WebMvcSseAsyncServerTransportTests.java
View file

@ -49,8 +49,7 @@ class WebMvcSseAsyncServerTransportTests extends AbstractMcpAsyncServerTests {
private AnnotationConfigWebApplicationContext appContext;
@Override
protected McpServerTransportProvider createMcpTransportProvider() {
private McpServerTransportProvider createMcpTransportProvider() {
// Set up Tomcat first
tomcat = new Tomcat();
tomcat.setPort(PORT);
@ -90,6 +89,11 @@ class WebMvcSseAsyncServerTransportTests extends AbstractMcpAsyncServerTests {
return transportProvider;
}
@Override
protected McpServer.AsyncSpecification<?> prepareAsyncServerBuilder() {
return McpServer.async(createMcpTransportProvider());
}
@Override
protected void onStart() {
}

6
mcp-spring/mcp-spring-webmvc/src/test/java/io/modelcontextprotocol/server/WebMvcSseSyncServerTransportTests.java
View file

@ -49,7 +49,11 @@ class WebMvcSseSyncServerTransportTests extends AbstractMcpSyncServerTests {
private AnnotationConfigWebApplicationContext appContext;
@Override
protected WebMvcSseServerTransportProvider createMcpTransportProvider() {
protected McpServer.SyncSpecification<?> prepareSyncServerBuilder() {
return McpServer.sync(createMcpTransportProvider());
}
private WebMvcSseServerTransportProvider createMcpTransportProvider() {
// Set up Tomcat first
tomcat = new Tomcat();
tomcat.setPort(PORT);