This enables servers to notify clients when specific resources are updated,
allowing clients to react to individual resource changes rather than just
list changes.
- Add ResourcesUpdatedNotification schema with uri field
- Add METHOD_NOTIFICATION_RESOURCES_UPDATED constant
- Implement notifyResourcesUpdated() methods in McpAsyncServer and McpSyncServer
- Add client-side support for resource update consumers and handlers
- Client automatically reads updated resource content when notification received
- Add tests for both async and sync server implementations
Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
This change enhances the client API by providing both paginated access for fine-grained
control and convenience methods for retrieving complete result sets automatically.
- Implement "list all" methods that automatically handle pagination using expand/reduce operations
- Replace null parameters with McpSchema.FIRST_PAGE constant for better readability
- Add tests for both paginated and "list all" functionality
- Update method javadocs to clarify pagination behavior
- Maintain backward compatibility
Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
Updates all Content types to represent annotations as nested objects
instead of directly on the content itself.
- Refactor TextContent, ImageContent, and EmbeddedResource to use Annotations object instead of separate audience/priority fields
- Add backward-compatible deprecated methods for audience() and priority() accessors
- Add parameterized tests for message annotations across different message types (success, error, debug)
- Test both text and image content annotations with proper priority and audience validation
This brings the implementation in line with the content types as modeled by the specification:
c87a0da6d8/schema/2025-03-26/schema.json (L1970-L1973)
- Add testSampling() methods to AbstractMcpAsyncClientTests and AbstractMcpSyncClientTests
Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
Co-authored-by: Christian Tzolov <christian.tzolov@broadcom.com>
An implementation of Streamable HTTP Client with WebFlux WebClient.
Aside from implementing the specification, several improvements have been incorporated throughout the client-side of the architecture.
The changes cover:
- resilience tests using toxiproxy in testcontainers
- integration tests using updated everything-server with streamableHttp support
- improved logging
- session invalidation handling (both transport session and JSON-RPC concept of session)
- implicit initialization and burst protection (in case of concurrent `Mcp(Sync|Async)Client` use
- more logging, e.g. stdio process lifecycle logs
Related #72, #273, #253, #107, #105
Signed-off-by: Dariusz Jędrzejczyk <dariusz.jedrzejczyk@broadcom.com>
- Add TestUtil class with findAvailablePort() method to the mcp-test module
- Add findAvailablePort() method to TomcatTestUtil classes
- Replace hardcoded port numbers with dynamic port allocation
Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
Refactors the MCP logging system to use the exchange mechanism for sending
logging notifications only to specific client sessions rather than broadcasting to all clients.
- Move logging notification delivery from server-wide broadcast to per-session exchange
- Implement per-session minimum logging level tracking and filtering
- Add proper logging level filtering at the exchange level
- Change setLoggingLevel from notification to request/response pattern (breaking change)
- Deprecate global server.loggingNotification in favor of exchange.loggingNotification
- Add SetLevelRequest record to McpSchema
- Add integration test demonstrating filtered logging notifications
Resolves#131
Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
Co-authored-by: Dariusz Jędrzejczyk <dariusz.jedrzejczyk@broadcom.com>
These changes are part of the planned deprecation cycle announced in 0.8.0,
with the deprecated classes scheduled for removal in 0.9.0
- Delete WebFluxSseServerTransport, WebMvcSseServerTransport, StdioServerTransport, and HttpServletSseServerTransport
- Remove deprecated interfaces: ServerMcpTransport, ClientMcpTransport
- Delete DefaultMcpSession implementation
- Remove all deprecated test classes for the removed implementations
- Update references to use McpServerTransport and McpClientTransport interfaces
- Split MockMcpTransport into client and server implementations
* Rename MockMcpTransport to MockMcpClientTransport in mcp/src/test
* Create new MockMcpServerTransport implementation
* Add MockMcpServerTransportProvider for server tests
* Mark MockMcpTransport in mcp-test module as deprecated
* Update all test classes to use the new implementations
Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
This commit introduces a major refactoring of the MCP Java SDK to implement a session-based architecture
for server-side implementations. The changes improve the SDK's ability to handle multiple concurrent
client connections and provide an API better aligned with the MCP specification.
Key changes:
- Introduce McpServerTransportProvider interface to manage client connections
- Rename ClientMcpTransport to McpClientTransport and ServerMcpTransport to McpServerTransport
- Add exchange objects (McpAsyncServerExchange, McpSyncServerExchange) for client interaction
- Update handler signatures to include exchange parameter: (args) -> result to (exchange, args) -> result
- Rename Registration classes to Specification classes
- Update method names (e.g., rootsChangeConsumers to rootsChangeHandlers)
- Deprecate old interfaces and classes for removal in 0.9.0
- Add migration guide (migration-0.8.0.md)
Resolves#9, #15
Co-authored-by: Christian Tzolov <christian.tzolov@broadcom.com>
Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
This change uses VirtualTimeScheduler and pretends enough time has
passed to trigger a timeout on the initialization.
Another problem with reliability of the tests was that the used
testcontainer for the SSE server does not support multiple clients and
the existence of both the global client for the entire suite and some
customized local clients in some tests caused responses to be delivered
to the other client at some racing situations. Now each test creates a
dedicated client and performs cleanup locally.
While these tests were improved, two other issues were found and fixed.
The first one is that the closeGracefully of DefaultMcpSession was not
lazy and would trigger connection disposal before the returned Mono was
subscribed. The second one was dealing with closing the StdIo client
before the process was started. In such a case there should not be an
error but rather a warning and successful completion.
- Add configurable initialization timeout separate from request timeout
- Rename ServletSse* test classes to HttpSse* for better naming consistency
- Replace direct .block() calls with StepVerifier for better reactive testing
- Change ping() method to return Mono instead of Mono
- Improve error handling and reactive programming patterns throughout tests
- Chain reactive operations for cleaner test flow
Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
Introduce new builder patterns and enhance type safety
- Add new builder patterns for McpClient and McpServer with sync/async variants
- Introduce dedicated McpClientFeatures and McpServerFeatures classes
- Enhance type safety and reactive support with proper Mono integration
- Add migration guide for 0.6.0 release
- Mark old builder methods as deprecated
- Update documentation to reflect new APIs
BREAKING CHANGE: The old builder patterns using McpClient.using() and McpServer.using()
are now deprecated in favor of new sync() and async() builders that provide
better type safety and clearer sync/async separation. Follow the migration guide.
Resolves#48
Signed-off-by: Dariusz Jędrzejczyk <dariusz.jedrzejczyk@broadcom.com>
Co-authored-by: Christian Tzolov <ctzolov@vmware.com>
Split the transport implementations into dedicated modules to improve modularity
and reduce core dependencies.
Added shared test module for common test utilities.
Key changes:
- Create mcp-transport/mcp-webflux-sse-transport module
- Move SseClientTransport → WebFluxSseClientTransport
- Move SseServerTransport → WebFluxSseServerTransport
- Move related tests and utilities
- Create mcp-transport/mcp-webmvc-sse-transport module
- Add new WebMvcSseServerTransport implementation
- Add corresponding tests and integration tests
- Add framework-independent SSE client implementations to core module
- Add FlowSseClient using java.net.http
- Add HttpClientSseClientTransport using java.net.http
- Keep StdioClientTransport/StdioServerTransport in core (no external deps)
- Create mcp-test module for shared test infrastructure
- Move abstract test base classes
- Move shared test utilities and mocks
- Update test dependencies
The modular approach allows users to choose between:
- Framework-specific implementations (WebFlux/WebMVC)
- Pure Java implementations (java.net.http)
- Basic implementations (STDIO)
Add breaking changes readme: 0.5.0-BREAKING-CHANGES.md
Resolves#54
