(WIP) Base for Java docs (#125)
* Base for Java docs * docs(java): Migrate Java-SDK/docs Add visual documentation for Java SDK architecture: - PlantUML class diagrams showing core components and relationships - Client and server architecture diagrams - Stack architecture overview - Generated UML class diagram with detailed implementation structure * Add Java Client and Server quickstarts * reorder, redact, correct java-sdk docs Signed-off-by: Dariusz Jędrzejczyk <dariusz.jedrzejczyk@broadcom.com> * updated updates.mdx * fix docs.json --------- Signed-off-by: Dariusz Jędrzejczyk <dariusz.jedrzejczyk@broadcom.com> Co-authored-by: Christian Tzolov <christian.tzolov@broadcom.com> Co-authored-by: Dariusz Jędrzejczyk <dariusz.jedrzejczyk@broadcom.com> Co-authored-by: David Soria Parra <davidsp@anthropic.com>
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Zachary Lee
GitHub
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1 changed files with 1780 additions and 5 deletions
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@ -739,6 +739,305 @@ This tells Claude for Desktop:
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2. Launch it by running `node /ABSOLUTE/PATH/TO/PARENT/FOLDER/weather/build/index.js`
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Save the file, and restart **Claude for Desktop**.
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</Tab>
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<Tab title='Java'>
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Let's get started with building our weather server!
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[You can find the complete code for what we'll be building here.](https://github.com/spring-projects/spring-ai-examples/tree/main/model-context-protocol/mcp-weather-server-quickstart)
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### System requirements
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- Java 17 or higher installed.
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- [Spring Boot 3.4](https://docs.spring.io/spring-boot/installing.html) or higher
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### Set up your environment
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Use the [Spring Initizer](https://start.spring.io/) to bootstrat a the [application skeleton](https://start.spring.io/#!type=maven-project&language=java&platformVersion=3.4.2&packaging=jar&jvmVersion=17&groupId=com.example.mcp.server&artifactId=weather&name=weather&description=Demo%20project%20for%20Spring%20Boot&packageName=com.example.mcp.server.weather&dependencies=spring-ai-anthropic,webflux).
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You will need to add the following dependencies:
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<Tabs>
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<Tab title="Maven">
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```xml
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<dependencies>
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<dependency>
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<groupId>org.springframework.ai</groupId>
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<artifactId>spring-ai-mcp-spring-boot-starter</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter</artifactId>
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</dependency>
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</dependencies>
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```
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</Tab>
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<Tab title="Gradle">
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```groovy
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dependencies {
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implementation platform("org.springframework.ai:spring-ai-mcp-spring-boot-starter")
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implementation platform("org.springframework:spring-web")
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implementation platform("org.springframework.boot:spring-boot-starter")
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}
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```
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</Tab>
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</Tabs>
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Then configure your application by setting the applicaiton properties:
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<CodeGroup>
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```bash application.properties
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spring.main.bannerMode=off
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logging.pattern.console=
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spring.ai.mcp.server.enabled=true
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```
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```yaml application.yml
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logging:
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pattern:
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console:
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spring:
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main:
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banner-mode: off
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ai:
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mcp:
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server:
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enabled: true
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```
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</CodeGroup>
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Now let's dive into building your server.
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## Building your server
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### Weather Service
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Let's implement a weather service that uses a REST client to query the data from the National Weather Service API:
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```java
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@Service
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public class WeatherService {
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private final RestClient restClient;
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public WeatherService() {
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this.restClient = RestClient.builder()
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.baseUrl("https://api.weather.gov")
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.defaultHeader("Accept", "application/geo+json")
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.defaultHeader("User-Agent", "WeatherApiClient/1.0 (your@email.com)")
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.build();
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}
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public record Points(Props properties) {
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public record Props(String forecast) { }
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}
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public record Forecast(Props properties) {
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public record Props(List<Period> periods) {}
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public record Period(Integer number, String name, String startTime, String endTime, Boolean isDayTime, Integer temperature, String temperatureUnit, String temperatureTrend, Map probabilityOfPrecipitation, String windSpeed, String windDirection, String icon, String shortForecast, String detailedForecast) {}
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}
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public record Alert(List<Feature> features) {
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public record Feature(Properties properties) {}
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public record Properties(String event, String areaDesc, String severity, String description, String instruction) {}
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}
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// ......
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}
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```
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The `@Service` annotation with auto-register the service in your applicaiton context.
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### Implementing tool execution
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The tool execution handler is responsible for actually executing the logic of each tool.
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The Spring AI `@Tool` annotation, making it easy to create and maintain MCP tools:
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```java
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@Tool(description = "Get weather forecast for a specific latitude/longitude")
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public String getWeatherForecastByLocation(double latitude, double longitude) {
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var points = restClient.get()
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.uri("/points/{latitude},{longitude}", latitude, longitude)
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.retrieve()
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.body(Points.class);
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var forecast = restClient.get().uri(points.properties().forecast()).retrieve().body(Forecast.class);
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String forecastText = forecast.properties().periods().stream().map(p -> {
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return String.format("""
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%s:
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Temperature: %s %s
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Wind: %s %s
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Forecast: %s
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""", p.name(), p.temperature(), p.temperatureUnit(), p.windSpeed(), p.windDirection(),
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p.detailedForecast());
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}).collect(Collectors.joining());
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return forecastText;
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}
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@Tool(description = "Get weather alerts for a US state. Input is Two-letter US state code (e.g. CA, NY)")
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public String getAlerts(String state) {
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Alert alert = restClient.get().uri("/alerts/active/area/{state}", state).retrieve().body(Alert.class);
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return alert.features()
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.stream()
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.map(f -> String.format("""
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Event: %s
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Area: %s
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Severity: %s
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Description: %s
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Instructions: %s
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""", f.properties().event(), f.properties.areaDesc(), f.properties.severity(),
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f.properties.description(), f.properties.instruction()))
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.collect(Collectors.joining("\n"));
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}
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```
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### Build your Boot Applicaiton
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```java
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@SpringBootApplication
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public class McpServerApplication {
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public static void main(String[] args) {
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SpringApplication.run(McpServerApplication.class, args);
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}
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@Bean
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public List<ToolCallback> weatherTools(WeatherService weatherService) {
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return List.of(ToolCallbacks.from(weatherService));
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}
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}
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```
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Uses the the `ToolCallbacks.from(...)` utils to convert the `@Tools` into actionalble callbackes used by the MCP server.
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### Running the server
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Finally, let's build and run the server:
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```bash
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./mvnw clean install
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java -jar model-context-protocol/mcp-weather-server-quickstart/target/mcp-weather-server-quickstart-0.0.1-SNAPSHOT.jar
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```
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Let's now test your server from an existing MCP host, Claude for Desktop.
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## Testing your server with Claude for Desktop
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<Note>
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Claude for Desktop is not yet available on Linux. Linux users can proceed to the [Building a client](/quickstart/client) tutorial to build an MCP client that connects to the server we just built.
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</Note>
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First, make sure you have Claude for Desktop installed. [You can install the latest version
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here.](https://claude.ai/download) If you already have Claude for Desktop, **make sure it's updated to the latest version.**
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We'll need to configure Claude for Desktop for whichever MCP servers you want to use. To do this, open your Claude for Desktop App configuration at `~/Library/Application Support/Claude/claude_desktop_config.json` in a text editor. Make sure to create the file if it doesn't exist.
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For example, if you have [VS Code](https://code.visualstudio.com/) installed:
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<Tabs>
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<Tab title="MacOS/Linux">
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```bash
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code ~/Library/Application\ Support/Claude/claude_desktop_config.json
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```
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</Tab>
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<Tab title="Windows">
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```powershell
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code $env:AppData\Claude\claude_desktop_config.json
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```
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</Tab>
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</Tabs>
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You'll then add your servers in the `mcpServers` key. The MCP UI elements will only show up in Claude for Desktop if at least one server is properly configured.
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In this case, we'll add our single weather server like so:
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<Tabs>
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<Tab title="MacOS/Linux">
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```json java
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{
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"mcpServers": {
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"spring-ai-mcp-weather": {
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"command": "java",
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"args": [
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"-Dspring.ai.mcp.server.transport=STDIO",
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"-jar",
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"/ABSOLUTE/PATH/TO/PARENT/FOLDER/mcp-weather-server-quickstart-0.0.1-SNAPSHOT.jar"
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]
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}
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}
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}
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```
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</Tab>
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<Tab title="Windows">
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```json java
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{
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"mcpServers": {
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"spring-ai-mcp-weather": {
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"command": "java",
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"args": [
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"-Dspring.ai.mcp.server.transport=STDIO",
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"-jar",
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"C:\\ABSOLUTE\\PATH\\TO\\PARENT\\FOLDER\\weather\\mcp-weather-server-quickstart-0.0.1-SNAPSHOT.jar"
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]
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}
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}
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}
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```
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</Tab>
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</Tabs>
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<Note>
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Make sure you pass in the absolute path to your server.
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</Note>
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This tells Claude for Desktop:
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1. There's an MCP server named "my-weather-server"
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2. To launch it by running `java -jar /ABSOLUTE/PATH/TO/PARENT/FOLDER/mcp-weather-server-quickstart-0.0.1-SNAPSHOT.jar`
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Save the file, and restart **Claude for Desktop**.
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## Testing your server with Java client
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Use the `McpClient` to connect to the server:
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```java
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var stdioParams = ServerParameters.builder("java")
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.args("-jar", "/ABSOLUTE/PATH/TO/PARENT/FOLDER/mcp-weather-server-quickstart-0.0.1-SNAPSHOT.jar")
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.build();
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var stdioTransport = new StdioClientTransport(stdioParams);
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var mcpClient = McpClient.sync(stdioTransport).build();
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mcpClient.initialize();
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ListToolsResult toolsList = mcpClient.listTools();
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CallToolResult weather = mcpClient.callTool(
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new CallToolRequest("getWeatherForecastByLocation",
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Map.of("latitude", "47.6062", "longitude", "-122.3321")));
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CallToolResult alert = mcpClient.callTool(
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new CallToolRequest("getAlerts", Map.of("state", "NY")));
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mcpClient.closeGracefully();
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```
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## More Java MCP Server examples
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The [mcp-webflux-server-starter](https://github.com/spring-projects/spring-ai-examples/tree/main/model-context-protocol/mcp-webflux-server-starter) demonstrates how to create a MCP server using SSE transport.
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It showcases how to define and register MCP Tools, Resources, and Prompts, using the Spring Boot's auto-configuration capabilities.
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</Tab>
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</Tabs>
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