Add method to get the MCP handler

This will allow setting custom MCP handlers that defer to the handler
that is set by the framework

Author: Randgalt

mcp-core/src/main/java/io/modelcontextprotocol/server/transport/HttpServletStatelessServerTransport.java

@@ -74,6 +74,11 @@ public void setMcpHandler(McpStatelessServerHandler mcpHandler) {
 		this.mcpHandler = mcpHandler;
 	}
 
+	@Override
+	public McpStatelessServerHandler getMcpHandler() {
+		return mcpHandler;
+	}
+
 	@Override
 	public Mono<Void> closeGracefully() {
 		return Mono.fromRunnable(() -> this.isClosing = true);

mcp-core/src/main/java/io/modelcontextprotocol/spec/McpStatelessServerTransport.java

@@ -4,15 +4,17 @@
 
 package io.modelcontextprotocol.spec;
 
-import java.util.List;
-
 import io.modelcontextprotocol.server.McpStatelessServerHandler;
 import reactor.core.publisher.Mono;
 
+import java.util.List;
+
 public interface McpStatelessServerTransport {
 
 	void setMcpHandler(McpStatelessServerHandler mcpHandler);
 
+	McpStatelessServerHandler getMcpHandler();
+
 	/**
 	 * Immediately closes all the transports with connected clients and releases any
 	 * associated resources.

mcp-spring/mcp-spring-webflux/src/main/java/io/modelcontextprotocol/server/transport/WebFluxStatelessServerTransport.java

@@ -66,6 +66,11 @@ public void setMcpHandler(McpStatelessServerHandler mcpHandler) {
 		this.mcpHandler = mcpHandler;
 	}
 
+	@Override
+	public McpStatelessServerHandler getMcpHandler() {
+		return mcpHandler;
+	}
+
 	@Override
 	public Mono<Void> closeGracefully() {
 		return Mono.fromRunnable(() -> this.isClosing = true);

mcp-spring/mcp-spring-webmvc/src/main/java/io/modelcontextprotocol/server/transport/WebMvcStatelessServerTransport.java

@@ -70,6 +70,11 @@ public void setMcpHandler(McpStatelessServerHandler mcpHandler) {
 		this.mcpHandler = mcpHandler;
 	}
 
+	@Override
+	public McpStatelessServerHandler getMcpHandler() {
+		return mcpHandler;
+	}
+
 	@Override
 	public Mono<Void> closeGracefully() {
 		return Mono.fromRunnable(() -> this.isClosing = true);