feat(java): Update the Java SDK to 0.8.0 (modelcontextprotocol#190)

* feat(java): Update the Java SDK to 0.8.0

- Update Java SDK version from 0.7.0 to 0.8.0
- Refactor transport layer to use transportProvider pattern
- Rename registrations to specifications in server API
- Add exchange parameter to callback functions
- Add breaking changes note
- Enhance MCP Java SDK documentation with sampling
  * Add documentation for sampling capabilities in MCP Server
  * Expand documentation for Tool, Resource, and Prompt specifications
  * Add Spring AI integration to the client/server docs

Signed-off-by: Christian Tzolov <[email protected]>

* refactor(java-sdk): improve API usage example

- Replace Content builder pattern with direct TextContent constructor
- Replace ModelHint builder pattern with static factory method

Signed-off-by: Christian Tzolov <[email protected]>

---------

Signed-off-by: Christian Tzolov <[email protected]>

Author: tzolov

sdk/java/.DS_Store

@@ -15,6 +15,11 @@ The MCP Client is a key component in the Model Context Protocol (MCP) architectu
 - Prompt system interactions
 - Optional features like roots management and sampling support
 
+<Tip> 
+The [Spring-AI MCP Client](https://docs.spring.io/spring-ai/reference/api/mcp/mcp-client-boot-starter-docs.html) integration extends the MCP Java SDK to 
+provide auto-configuration for MCP client functionality in Spring Boot applications and integrating with Spring AI’s [tool execution framework](https://docs.spring.io/spring-ai/reference/api/tools.html).
+</Tip>
+
 The client provides both synchronous and asynchronous APIs for flexibility in different application contexts.
 
 <Tabs>
@@ -182,7 +187,6 @@ The roots capability allows servers to:
 - Receive notifications when the roots list changes
 - Understand which directories and files they have access to
 
-
 ### Sampling Support
 
 Sampling enables servers to request LLM interactions ("completions" or "generations") through the client:
@@ -209,7 +213,6 @@ This capability allows:
 - Support for both text and image-based interactions
 - Optional inclusion of MCP server context in prompts
 
-
 ## Using MCP Clients
 
 ### Tool Execution
@@ -320,3 +323,4 @@ client.executePrompt("echo", Map.of(
 ```
   </Tab>
 </Tabs>
+

sdk/java/mcp-client.mdx

@@ -6,6 +6,12 @@ description: Introduction to the Model Context Protocol (MCP) Java SDK
 Java SDK for the [Model Context Protocol](https://modelcontextprotocol.org/docs/concepts/architecture)
 enables standardized integration between AI models and tools.
 
+<Note>
+### Breaking Changes in 0.8.0 ⚠️
+**Note:** Version 0.8.0 introduces several breaking changes including a new session-based architecture. 
+If you're upgrading from 0.7.0, please refer to the [Migration Guide](https://github.com/modelcontextprotocol/java-sdk/blob/main/migration-0.8.0.md) for detailed instructions.
+</Note>
+
 ## Features
 
 - MCP Client and MCP Server implementations supporting:
@@ -25,6 +31,10 @@ enables standardized integration between AI models and tools.
     - WebMVC SSE transport for servlet-based HTTP streaming
 - Supports Synchronous and Asynchronous programming paradigms
 
+<Tip>[Spring AI MCP](https://docs.spring.io/spring-ai/reference/api/mcp/mcp-overview.html) extends the MCP Java SDK with Spring Boot integration, 
+providing both [Client](https://docs.spring.io/spring-ai/reference/api/mcp/mcp-client-boot-starter-docs.html) and [Server](https://docs.spring.io/spring-ai/reference/api/mcp/mcp-server-boot-starter-docs.html) Boot Starters. 
+You can bootstrap your AI Spring applications using the [Spring Initializer](https://start.spring.io/).</Tip>
+
 ## Architecture
 
 The SDK follows a layered architecture with clear separation of concerns:
@@ -129,7 +139,7 @@ Add the BOM to your project:
         <dependency>
             <groupId>io.modelcontextprotocol.sdk</groupId>
             <artifactId>mcp-bom</artifactId>
-            <version>0.7.0</version>
+            <version>0.8.0</version>
             <type>pom</type>
             <scope>import</scope>
         </dependency>
@@ -141,7 +151,7 @@ Add the BOM to your project:
   <Tab title="Gradle">
 ```groovy
 dependencies {
-  implementation platform("io.modelcontextprotocol.sdk:mcp-bom:0.7.0")
+  implementation platform("io.modelcontextprotocol.sdk:mcp-bom:0.8.0")
   //...
 }
 ```