Add MCP annotations sample project

Demonstrates the use of Spring AI MCP annotations for creating an MCP server.

- Add @McpComplete, @McpArg, @McpResource, @McpPrompt handlers

The project showcases how to use Spring AI's annotation-based approach to easily expose tools, resources, prompts, and completions through an MCP server.

Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>
This commit is contained in:
Christian Tzolov
2025-05-06 14:20:53 +02:00
parent 58ae24ce71
commit b98aecb03b
15 changed files with 1612 additions and 0 deletions

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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
wrapperVersion=3.3.2
distributionType=only-script
distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.9/apache-maven-3.9.9-bin.zip

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# Spring AI MCP Weather Server Sample with WebMVC Starter
This sample project demonstrates how to create an MCP server using the Spring AI MCP Server Boot Starter with WebMVC transport. It implements a weather service that exposes tools for retrieving weather information using the National Weather Service API.
For more information, see the [MCP Server Boot Starter](https://docs.spring.io/spring-ai/reference/api/mcp/mcp-server-boot-starter-docs.html) reference documentation.
## Overview
The sample showcases:
- Integration with `spring-ai-mcp-server-webmvc-spring-boot-starter`
- Support for both SSE (Server-Sent Events) and STDIO transports
- Automatic tool registration using Spring AI's `@Tool` annotation
- Two weather-related tools:
- Get weather forecast by location (latitude/longitude)
- Get weather alerts by US state
## Dependencies
The project requires the Spring AI MCP Server WebMVC Boot Starter:
```xml
<dependency>
<groupId>org.springframework.ai</groupId>
<artifactId>spring-ai-mcp-server-webmvc-spring-boot-starter</artifactId>
</dependency>
```
This starter provides:
- HTTP-based transport using Spring MVC (`WebMvcSseServerTransport`)
- Auto-configured SSE endpoints
- Optional STDIO transport
- Included `spring-boot-starter-web` and `mcp-spring-webmvc` dependencies
## Building the Project
Build the project using Maven:
```bash
./mvnw clean install -DskipTests
```
## Running the Server
The server supports two transport modes:
### WebMVC SSE Mode (Default)
```bash
java -jar target/mcp-weather-starter-webmvc-server-0.0.1-SNAPSHOT.jar
```
### STDIO Mode
To enable STDIO transport, set the appropriate properties:
```bash
java -Dspring.ai.mcp.server.stdio=true -Dspring.main.web-application-type=none -jar target/mcp-weather-starter-webmvc-server-0.0.1-SNAPSHOT.jar
```
## Configuration
Configure the server through `application.properties`:
```properties
# Server identification
spring.ai.mcp.server.name=my-weather-server
spring.ai.mcp.server.version=0.0.1
# Server type (SYNC/ASYNC)
spring.ai.mcp.server.type=SYNC
# Transport configuration
spring.ai.mcp.server.stdio=false
spring.ai.mcp.server.sse-message-endpoint=/mcp/message
# Change notifications
spring.ai.mcp.server.resource-change-notification=true
spring.ai.mcp.server.tool-change-notification=true
spring.ai.mcp.server.prompt-change-notification=true
# Logging (required for STDIO transport)
spring.main.banner-mode=off
logging.file.name=./target/starter-webmvc-server.log
```
## Available Tools
### Weather Forecast Tool
- Name: `getWeatherForecastByLocation`
- Description: Get weather forecast for a specific latitude/longitude
- Parameters:
- `latitude`: double - Latitude coordinate
- `longitude`: double - Longitude coordinate
### Weather Alerts Tool
- Name: `getAlerts`
- Description: Get weather alerts for a US state
- Parameters:
- `state`: String - Two-letter US state code (e.g., CA, NY)
## Server Implementation
The server uses Spring Boot and Spring AI's tool annotations for automatic tool registration:
```java
@SpringBootApplication
public class McpServerApplication {
public static void main(String[] args) {
SpringApplication.run(McpServerApplication.class, args);
}
@Bean
public ToolCallbackProvider weatherTools(WeatherService weatherService){
return MethodToolCallbackProvider.builder().toolObjects(weatherService).build();
}
}
```
The `WeatherService` implements the weather tools using the `@Tool` annotation:
```java
@Service
public class WeatherService {
@Tool(description = "Get weather forecast for a specific latitude/longitude")
public String getWeatherForecastByLocation(double latitude, double longitude) {
// Implementation using weather.gov API
}
@Tool(description = "Get weather alerts for a US state. Input is Two-letter US state code (e.g., CA, NY)")
public String getAlerts(String state) {
// Implementation using weather.gov API
}
}
```
## MCP Clients
You can connect to the weather server using either STDIO or SSE transport:
### Manual Clients
#### WebMVC SSE Client
For servers using SSE transport:
```java
var transport = new HttpClientSseClientTransport("http://localhost:8080");
var client = McpClient.sync(transport).build();
```
#### STDIO Client
For servers using STDIO transport:
```java
var stdioParams = ServerParameters.builder("java")
.args("-Dspring.ai.mcp.server.stdio=true",
"-Dspring.main.web-application-type=none",
"-Dspring.main.banner-mode=off",
"-Dlogging.pattern.console=",
"-jar",
"target/mcp-weather-starter-webmvc-server-0.0.1-SNAPSHOT.jar")
.build();
var transport = new StdioClientTransport(stdioParams);
var client = McpClient.sync(transport).build();
```
The sample project includes example client implementations:
- [SampleClient.java](src/test/java/org/springframework/ai/mcp/sample/client/SampleClient.java): Manual MCP client implementation
- [ClientStdio.java](src/test/java/org/springframework/ai/mcp/sample/client/ClientStdio.java): STDIO transport connection
- [ClientSse.java](src/test/java/org/springframework/ai/mcp/sample/client/ClientSse.java): SSE transport connection
For a better development experience, consider using the [MCP Client Boot Starters](https://docs.spring.io/spring-ai/reference/api/mcp/mcp-client-boot-starter-docs.html). These starters enable auto-configuration of multiple STDIO and/or SSE connections to MCP servers. See the [starter-default-client](../../client-starter/starter-default-client) project for examples.
### Boot Starter Clients
Let's use the [starter-default-client](../../client-starter/starter-default-client) client to connect to our weather `starter-webmvc-server`.
Follow the `starter-default-client` readme instruction to build a `mcp-starter-default-client-0.0.1-SNAPSHOT.jar` client application.
#### STDIO Transport
1. Create a `mcp-servers-config.json` configuration file with this content:
```json
{
"mcpServers": {
"weather-starter-webmvc-server": {
"command": "java",
"args": [
"-Dspring.ai.mcp.server.stdio=true",
"-Dspring.main.web-application-type=none",
"-Dlogging.pattern.console=",
"-jar",
"/absolute/path/to/mcp-weather-starter-webmvc-server-0.0.1-SNAPSHOT.jar"
]
}
}
}
```
2. Run the client using the configuration file:
```bash
java -Dspring.ai.mcp.client.stdio.servers-configuration=file:mcp-servers-config.json \
-Dai.user.input='What is the weather in NY?' \
-Dlogging.pattern.console= \
-jar mcp-starter-default-client-0.0.1-SNAPSHOT.jar
```
#### SSE (WebMVC) Transport
1. Start the `mcp-weather-starter-webmvc-server`:
```bash
java -jar mcp-weather-starter-webmvc-server-0.0.1-SNAPSHOT.jar
```
starts the MCP server on port 8080.
2. In another console start the client configured with SSE transport:
```bash
java -Dspring.ai.mcp.client.sse.connections.weather-server.url=http://localhost:8080 \
-Dlogging.pattern.console= \
-Dai.user.input='What is the weather in NY?' \
-jar mcp-starter-default-client-0.0.1-SNAPSHOT.jar
```
## Additional Resources
* [Spring AI Documentation](https://docs.spring.io/spring-ai/reference/)
* [MCP Server Boot Starter](https://docs.spring.io/spring-ai/reference/api/mcp/mcp-server-boot-starter-docs.html)
* [MCP Client Boot Starter](https://docs.spring.io/spring-ai/reference/api/mcp/mcp-server-boot-client-docs.html)
* [Model Context Protocol Specification](https://modelcontextprotocol.github.io/specification/)
* [Spring Boot Auto-configuration](https://docs.spring.io/spring-boot/docs/current/reference/html/features.html#features.developing-auto-configuration)

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#!/bin/sh
# ----------------------------------------------------------------------------
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
# ----------------------------------------------------------------------------
# ----------------------------------------------------------------------------
# Apache Maven Wrapper startup batch script, version 3.3.2
#
# Optional ENV vars
# -----------------
# JAVA_HOME - location of a JDK home dir, required when download maven via java source
# MVNW_REPOURL - repo url base for downloading maven distribution
# MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven
# MVNW_VERBOSE - true: enable verbose log; debug: trace the mvnw script; others: silence the output
# ----------------------------------------------------------------------------
set -euf
[ "${MVNW_VERBOSE-}" != debug ] || set -x
# OS specific support.
native_path() { printf %s\\n "$1"; }
case "$(uname)" in
CYGWIN* | MINGW*)
[ -z "${JAVA_HOME-}" ] || JAVA_HOME="$(cygpath --unix "$JAVA_HOME")"
native_path() { cygpath --path --windows "$1"; }
;;
esac
# set JAVACMD and JAVACCMD
set_java_home() {
# For Cygwin and MinGW, ensure paths are in Unix format before anything is touched
if [ -n "${JAVA_HOME-}" ]; then
if [ -x "$JAVA_HOME/jre/sh/java" ]; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD="$JAVA_HOME/jre/sh/java"
JAVACCMD="$JAVA_HOME/jre/sh/javac"
else
JAVACMD="$JAVA_HOME/bin/java"
JAVACCMD="$JAVA_HOME/bin/javac"
if [ ! -x "$JAVACMD" ] || [ ! -x "$JAVACCMD" ]; then
echo "The JAVA_HOME environment variable is not defined correctly, so mvnw cannot run." >&2
echo "JAVA_HOME is set to \"$JAVA_HOME\", but \"\$JAVA_HOME/bin/java\" or \"\$JAVA_HOME/bin/javac\" does not exist." >&2
return 1
fi
fi
else
JAVACMD="$(
'set' +e
'unset' -f command 2>/dev/null
'command' -v java
)" || :
JAVACCMD="$(
'set' +e
'unset' -f command 2>/dev/null
'command' -v javac
)" || :
if [ ! -x "${JAVACMD-}" ] || [ ! -x "${JAVACCMD-}" ]; then
echo "The java/javac command does not exist in PATH nor is JAVA_HOME set, so mvnw cannot run." >&2
return 1
fi
fi
}
# hash string like Java String::hashCode
hash_string() {
str="${1:-}" h=0
while [ -n "$str" ]; do
char="${str%"${str#?}"}"
h=$(((h * 31 + $(LC_CTYPE=C printf %d "'$char")) % 4294967296))
str="${str#?}"
done
printf %x\\n $h
}
verbose() { :; }
[ "${MVNW_VERBOSE-}" != true ] || verbose() { printf %s\\n "${1-}"; }
die() {
printf %s\\n "$1" >&2
exit 1
}
trim() {
# MWRAPPER-139:
# Trims trailing and leading whitespace, carriage returns, tabs, and linefeeds.
# Needed for removing poorly interpreted newline sequences when running in more
# exotic environments such as mingw bash on Windows.
printf "%s" "${1}" | tr -d '[:space:]'
}
# parse distributionUrl and optional distributionSha256Sum, requires .mvn/wrapper/maven-wrapper.properties
while IFS="=" read -r key value; do
case "${key-}" in
distributionUrl) distributionUrl=$(trim "${value-}") ;;
distributionSha256Sum) distributionSha256Sum=$(trim "${value-}") ;;
esac
done <"${0%/*}/.mvn/wrapper/maven-wrapper.properties"
[ -n "${distributionUrl-}" ] || die "cannot read distributionUrl property in ${0%/*}/.mvn/wrapper/maven-wrapper.properties"
case "${distributionUrl##*/}" in
maven-mvnd-*bin.*)
MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/
case "${PROCESSOR_ARCHITECTURE-}${PROCESSOR_ARCHITEW6432-}:$(uname -a)" in
*AMD64:CYGWIN* | *AMD64:MINGW*) distributionPlatform=windows-amd64 ;;
:Darwin*x86_64) distributionPlatform=darwin-amd64 ;;
:Darwin*arm64) distributionPlatform=darwin-aarch64 ;;
:Linux*x86_64*) distributionPlatform=linux-amd64 ;;
*)
echo "Cannot detect native platform for mvnd on $(uname)-$(uname -m), use pure java version" >&2
distributionPlatform=linux-amd64
;;
esac
distributionUrl="${distributionUrl%-bin.*}-$distributionPlatform.zip"
;;
maven-mvnd-*) MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/ ;;
*) MVN_CMD="mvn${0##*/mvnw}" _MVNW_REPO_PATTERN=/org/apache/maven/ ;;
esac
# apply MVNW_REPOURL and calculate MAVEN_HOME
# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-<version>,maven-mvnd-<version>-<platform>}/<hash>
[ -z "${MVNW_REPOURL-}" ] || distributionUrl="$MVNW_REPOURL$_MVNW_REPO_PATTERN${distributionUrl#*"$_MVNW_REPO_PATTERN"}"
distributionUrlName="${distributionUrl##*/}"
distributionUrlNameMain="${distributionUrlName%.*}"
distributionUrlNameMain="${distributionUrlNameMain%-bin}"
MAVEN_USER_HOME="${MAVEN_USER_HOME:-${HOME}/.m2}"
MAVEN_HOME="${MAVEN_USER_HOME}/wrapper/dists/${distributionUrlNameMain-}/$(hash_string "$distributionUrl")"
exec_maven() {
unset MVNW_VERBOSE MVNW_USERNAME MVNW_PASSWORD MVNW_REPOURL || :
exec "$MAVEN_HOME/bin/$MVN_CMD" "$@" || die "cannot exec $MAVEN_HOME/bin/$MVN_CMD"
}
if [ -d "$MAVEN_HOME" ]; then
verbose "found existing MAVEN_HOME at $MAVEN_HOME"
exec_maven "$@"
fi
case "${distributionUrl-}" in
*?-bin.zip | *?maven-mvnd-?*-?*.zip) ;;
*) die "distributionUrl is not valid, must match *-bin.zip or maven-mvnd-*.zip, but found '${distributionUrl-}'" ;;
esac
# prepare tmp dir
if TMP_DOWNLOAD_DIR="$(mktemp -d)" && [ -d "$TMP_DOWNLOAD_DIR" ]; then
clean() { rm -rf -- "$TMP_DOWNLOAD_DIR"; }
trap clean HUP INT TERM EXIT
else
die "cannot create temp dir"
fi
mkdir -p -- "${MAVEN_HOME%/*}"
# Download and Install Apache Maven
verbose "Couldn't find MAVEN_HOME, downloading and installing it ..."
verbose "Downloading from: $distributionUrl"
verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName"
# select .zip or .tar.gz
if ! command -v unzip >/dev/null; then
distributionUrl="${distributionUrl%.zip}.tar.gz"
distributionUrlName="${distributionUrl##*/}"
fi
# verbose opt
__MVNW_QUIET_WGET=--quiet __MVNW_QUIET_CURL=--silent __MVNW_QUIET_UNZIP=-q __MVNW_QUIET_TAR=''
[ "${MVNW_VERBOSE-}" != true ] || __MVNW_QUIET_WGET='' __MVNW_QUIET_CURL='' __MVNW_QUIET_UNZIP='' __MVNW_QUIET_TAR=v
# normalize http auth
case "${MVNW_PASSWORD:+has-password}" in
'') MVNW_USERNAME='' MVNW_PASSWORD='' ;;
has-password) [ -n "${MVNW_USERNAME-}" ] || MVNW_USERNAME='' MVNW_PASSWORD='' ;;
esac
if [ -z "${MVNW_USERNAME-}" ] && command -v wget >/dev/null; then
verbose "Found wget ... using wget"
wget ${__MVNW_QUIET_WGET:+"$__MVNW_QUIET_WGET"} "$distributionUrl" -O "$TMP_DOWNLOAD_DIR/$distributionUrlName" || die "wget: Failed to fetch $distributionUrl"
elif [ -z "${MVNW_USERNAME-}" ] && command -v curl >/dev/null; then
verbose "Found curl ... using curl"
curl ${__MVNW_QUIET_CURL:+"$__MVNW_QUIET_CURL"} -f -L -o "$TMP_DOWNLOAD_DIR/$distributionUrlName" "$distributionUrl" || die "curl: Failed to fetch $distributionUrl"
elif set_java_home; then
verbose "Falling back to use Java to download"
javaSource="$TMP_DOWNLOAD_DIR/Downloader.java"
targetZip="$TMP_DOWNLOAD_DIR/$distributionUrlName"
cat >"$javaSource" <<-END
public class Downloader extends java.net.Authenticator
{
protected java.net.PasswordAuthentication getPasswordAuthentication()
{
return new java.net.PasswordAuthentication( System.getenv( "MVNW_USERNAME" ), System.getenv( "MVNW_PASSWORD" ).toCharArray() );
}
public static void main( String[] args ) throws Exception
{
setDefault( new Downloader() );
java.nio.file.Files.copy( java.net.URI.create( args[0] ).toURL().openStream(), java.nio.file.Paths.get( args[1] ).toAbsolutePath().normalize() );
}
}
END
# For Cygwin/MinGW, switch paths to Windows format before running javac and java
verbose " - Compiling Downloader.java ..."
"$(native_path "$JAVACCMD")" "$(native_path "$javaSource")" || die "Failed to compile Downloader.java"
verbose " - Running Downloader.java ..."
"$(native_path "$JAVACMD")" -cp "$(native_path "$TMP_DOWNLOAD_DIR")" Downloader "$distributionUrl" "$(native_path "$targetZip")"
fi
# If specified, validate the SHA-256 sum of the Maven distribution zip file
if [ -n "${distributionSha256Sum-}" ]; then
distributionSha256Result=false
if [ "$MVN_CMD" = mvnd.sh ]; then
echo "Checksum validation is not supported for maven-mvnd." >&2
echo "Please disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
exit 1
elif command -v sha256sum >/dev/null; then
if echo "$distributionSha256Sum $TMP_DOWNLOAD_DIR/$distributionUrlName" | sha256sum -c >/dev/null 2>&1; then
distributionSha256Result=true
fi
elif command -v shasum >/dev/null; then
if echo "$distributionSha256Sum $TMP_DOWNLOAD_DIR/$distributionUrlName" | shasum -a 256 -c >/dev/null 2>&1; then
distributionSha256Result=true
fi
else
echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available." >&2
echo "Please install either command, or disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
exit 1
fi
if [ $distributionSha256Result = false ]; then
echo "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised." >&2
echo "If you updated your Maven version, you need to update the specified distributionSha256Sum property." >&2
exit 1
fi
fi
# unzip and move
if command -v unzip >/dev/null; then
unzip ${__MVNW_QUIET_UNZIP:+"$__MVNW_QUIET_UNZIP"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -d "$TMP_DOWNLOAD_DIR" || die "failed to unzip"
else
tar xzf${__MVNW_QUIET_TAR:+"$__MVNW_QUIET_TAR"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -C "$TMP_DOWNLOAD_DIR" || die "failed to untar"
fi
printf %s\\n "$distributionUrl" >"$TMP_DOWNLOAD_DIR/$distributionUrlNameMain/mvnw.url"
mv -- "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" "$MAVEN_HOME" || [ -d "$MAVEN_HOME" ] || die "fail to move MAVEN_HOME"
clean || :
exec_maven "$@"

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<# : batch portion
@REM ----------------------------------------------------------------------------
@REM Licensed to the Apache Software Foundation (ASF) under one
@REM or more contributor license agreements. See the NOTICE file
@REM distributed with this work for additional information
@REM regarding copyright ownership. The ASF licenses this file
@REM to you under the Apache License, Version 2.0 (the
@REM "License"); you may not use this file except in compliance
@REM with the License. You may obtain a copy of the License at
@REM
@REM http://www.apache.org/licenses/LICENSE-2.0
@REM
@REM Unless required by applicable law or agreed to in writing,
@REM software distributed under the License is distributed on an
@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
@REM KIND, either express or implied. See the License for the
@REM specific language governing permissions and limitations
@REM under the License.
@REM ----------------------------------------------------------------------------
@REM ----------------------------------------------------------------------------
@REM Apache Maven Wrapper startup batch script, version 3.3.2
@REM
@REM Optional ENV vars
@REM MVNW_REPOURL - repo url base for downloading maven distribution
@REM MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven
@REM MVNW_VERBOSE - true: enable verbose log; others: silence the output
@REM ----------------------------------------------------------------------------
@IF "%__MVNW_ARG0_NAME__%"=="" (SET __MVNW_ARG0_NAME__=%~nx0)
@SET __MVNW_CMD__=
@SET __MVNW_ERROR__=
@SET __MVNW_PSMODULEP_SAVE=%PSModulePath%
@SET PSModulePath=
@FOR /F "usebackq tokens=1* delims==" %%A IN (`powershell -noprofile "& {$scriptDir='%~dp0'; $script='%__MVNW_ARG0_NAME__%'; icm -ScriptBlock ([Scriptblock]::Create((Get-Content -Raw '%~f0'))) -NoNewScope}"`) DO @(
IF "%%A"=="MVN_CMD" (set __MVNW_CMD__=%%B) ELSE IF "%%B"=="" (echo %%A) ELSE (echo %%A=%%B)
)
@SET PSModulePath=%__MVNW_PSMODULEP_SAVE%
@SET __MVNW_PSMODULEP_SAVE=
@SET __MVNW_ARG0_NAME__=
@SET MVNW_USERNAME=
@SET MVNW_PASSWORD=
@IF NOT "%__MVNW_CMD__%"=="" (%__MVNW_CMD__% %*)
@echo Cannot start maven from wrapper >&2 && exit /b 1
@GOTO :EOF
: end batch / begin powershell #>
$ErrorActionPreference = "Stop"
if ($env:MVNW_VERBOSE -eq "true") {
$VerbosePreference = "Continue"
}
# calculate distributionUrl, requires .mvn/wrapper/maven-wrapper.properties
$distributionUrl = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionUrl
if (!$distributionUrl) {
Write-Error "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties"
}
switch -wildcard -casesensitive ( $($distributionUrl -replace '^.*/','') ) {
"maven-mvnd-*" {
$USE_MVND = $true
$distributionUrl = $distributionUrl -replace '-bin\.[^.]*$',"-windows-amd64.zip"
$MVN_CMD = "mvnd.cmd"
break
}
default {
$USE_MVND = $false
$MVN_CMD = $script -replace '^mvnw','mvn'
break
}
}
# apply MVNW_REPOURL and calculate MAVEN_HOME
# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-<version>,maven-mvnd-<version>-<platform>}/<hash>
if ($env:MVNW_REPOURL) {
$MVNW_REPO_PATTERN = if ($USE_MVND) { "/org/apache/maven/" } else { "/maven/mvnd/" }
$distributionUrl = "$env:MVNW_REPOURL$MVNW_REPO_PATTERN$($distributionUrl -replace '^.*'+$MVNW_REPO_PATTERN,'')"
}
$distributionUrlName = $distributionUrl -replace '^.*/',''
$distributionUrlNameMain = $distributionUrlName -replace '\.[^.]*$','' -replace '-bin$',''
$MAVEN_HOME_PARENT = "$HOME/.m2/wrapper/dists/$distributionUrlNameMain"
if ($env:MAVEN_USER_HOME) {
$MAVEN_HOME_PARENT = "$env:MAVEN_USER_HOME/wrapper/dists/$distributionUrlNameMain"
}
$MAVEN_HOME_NAME = ([System.Security.Cryptography.MD5]::Create().ComputeHash([byte[]][char[]]$distributionUrl) | ForEach-Object {$_.ToString("x2")}) -join ''
$MAVEN_HOME = "$MAVEN_HOME_PARENT/$MAVEN_HOME_NAME"
if (Test-Path -Path "$MAVEN_HOME" -PathType Container) {
Write-Verbose "found existing MAVEN_HOME at $MAVEN_HOME"
Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD"
exit $?
}
if (! $distributionUrlNameMain -or ($distributionUrlName -eq $distributionUrlNameMain)) {
Write-Error "distributionUrl is not valid, must end with *-bin.zip, but found $distributionUrl"
}
# prepare tmp dir
$TMP_DOWNLOAD_DIR_HOLDER = New-TemporaryFile
$TMP_DOWNLOAD_DIR = New-Item -Itemtype Directory -Path "$TMP_DOWNLOAD_DIR_HOLDER.dir"
$TMP_DOWNLOAD_DIR_HOLDER.Delete() | Out-Null
trap {
if ($TMP_DOWNLOAD_DIR.Exists) {
try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
}
}
New-Item -Itemtype Directory -Path "$MAVEN_HOME_PARENT" -Force | Out-Null
# Download and Install Apache Maven
Write-Verbose "Couldn't find MAVEN_HOME, downloading and installing it ..."
Write-Verbose "Downloading from: $distributionUrl"
Write-Verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName"
$webclient = New-Object System.Net.WebClient
if ($env:MVNW_USERNAME -and $env:MVNW_PASSWORD) {
$webclient.Credentials = New-Object System.Net.NetworkCredential($env:MVNW_USERNAME, $env:MVNW_PASSWORD)
}
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
$webclient.DownloadFile($distributionUrl, "$TMP_DOWNLOAD_DIR/$distributionUrlName") | Out-Null
# If specified, validate the SHA-256 sum of the Maven distribution zip file
$distributionSha256Sum = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionSha256Sum
if ($distributionSha256Sum) {
if ($USE_MVND) {
Write-Error "Checksum validation is not supported for maven-mvnd. `nPlease disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties."
}
Import-Module $PSHOME\Modules\Microsoft.PowerShell.Utility -Function Get-FileHash
if ((Get-FileHash "$TMP_DOWNLOAD_DIR/$distributionUrlName" -Algorithm SHA256).Hash.ToLower() -ne $distributionSha256Sum) {
Write-Error "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised. If you updated your Maven version, you need to update the specified distributionSha256Sum property."
}
}
# unzip and move
Expand-Archive "$TMP_DOWNLOAD_DIR/$distributionUrlName" -DestinationPath "$TMP_DOWNLOAD_DIR" | Out-Null
Rename-Item -Path "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" -NewName $MAVEN_HOME_NAME | Out-Null
try {
Move-Item -Path "$TMP_DOWNLOAD_DIR/$MAVEN_HOME_NAME" -Destination $MAVEN_HOME_PARENT | Out-Null
} catch {
if (! (Test-Path -Path "$MAVEN_HOME" -PathType Container)) {
Write-Error "fail to move MAVEN_HOME"
}
} finally {
try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
}
Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD"

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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>3.3.6</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>mcp-annotations-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Spring AI MCP Annotations Sample</name>
<description>Sample Spring Boot application demonstrating MCP client and server usage</description>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.ai</groupId>
<artifactId>spring-ai-bom</artifactId>
<version>1.0.0-SNAPSHOT</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>com.logaritex.mcp</groupId>
<artifactId>spring-ai-mcp-annotations</artifactId>
<version>0.1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.springframework.ai</groupId>
<artifactId>spring-ai-starter-mcp-server-webmvc</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<releases>
<enabled>false</enabled>
</releases>
</repository>
<repository>
<id>central-portal-snapshots</id>
<name>Central Portal Snapshots</name>
<url>https://central.sonatype.com/repository/maven-snapshots/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
</project>

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/*
* Copyright 2025 - 2025 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.ai.mcp.sample.server;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.logaritex.mcp.annotation.McpComplete;
import io.modelcontextprotocol.spec.McpSchema.CompleteRequest;
import io.modelcontextprotocol.spec.McpSchema.CompleteResult;
import io.modelcontextprotocol.spec.McpSchema.CompleteResult.CompleteCompletion;
import org.springframework.stereotype.Service;
/**
* @author Christian Tzolov
*/
@Service
public class AutocompleteProvider {
private final Map<String, List<String>> countryDatabase = new HashMap<>();
private final Map<String, List<String>> usernameDatabase = new HashMap<>();
public AutocompleteProvider() {
usernameDatabase.put("a", List.of("alex123", "admin", "alice_wonder", "andrew99"));
usernameDatabase.put("b", List.of("bob_builder", "blue_sky", "batman", "butterfly"));
usernameDatabase.put("c", List.of("charlie", "cool_cat", "coder42", "captain_marvel"));
usernameDatabase.put("d", List.of("david_dev", "dragon_slayer", "diamond_hand", "dancer"));
usernameDatabase.put("j", List.of("john_doe", "java_expert", "jazz_lover", "jupiter"));
usernameDatabase.put("m", List.of("martin123", "moon_walker", "master_chef", "music_fan"));
usernameDatabase.put("s", List.of("sarah", "super_coder", "star_gazer", "swift_dev"));
usernameDatabase.put("t", List.of("tech_guru", "traveler", "tiger", "tester101"));
countryDatabase.put("a", List.of("Afghanistan", "Albania", "Algeria", "Argentina", "Australia", "Austria"));
countryDatabase.put("b", List.of("Bahamas", "Belgium", "Brazil", "Bulgaria"));
countryDatabase.put("c", List.of("Canada", "Chile", "China", "Colombia", "Croatia"));
countryDatabase.put("f", List.of("Finland", "France"));
countryDatabase.put("g", List.of("Germany", "Greece"));
countryDatabase.put("i", List.of("Iceland", "India", "Indonesia", "Ireland", "Italy"));
countryDatabase.put("j", List.of("Japan"));
countryDatabase.put("u", List.of("Uganda", "Ukraine", "United Kingdom", "United States"));
}
/**
* Complete method for usernames in a user status prompt.
*/
@McpComplete(uri = "user-status://{username}")
public List<String> completeUsername(String usernamePrefix) {
String prefix = usernamePrefix.toLowerCase();
if (prefix.isEmpty()) {
return List.of("Enter a username");
}
String firstLetter = prefix.substring(0, 1);
List<String> usernames = usernameDatabase.getOrDefault(firstLetter, List.of());
return usernames.stream().filter(username -> username.toLowerCase().startsWith(prefix)).toList();
}
@McpComplete(prompt = "personalized-message")
public List<String> completeName(String name) {
String prefix = name.toLowerCase();
if (prefix.isEmpty()) {
return List.of("Enter a username");
}
String firstLetter = prefix.substring(0, 1);
List<String> usernames = usernameDatabase.getOrDefault(firstLetter, List.of());
return usernames.stream().filter(username -> username.toLowerCase().startsWith(prefix)).toList();
}
/**
* Complete method for country names in a travel prompt.
*/
@McpComplete(prompt = "travel-planner")
public CompleteResult completeCountryName(CompleteRequest request) {
String prefix = request.argument().value().toLowerCase();
if (prefix.isEmpty()) {
return new CompleteResult(new CompleteCompletion(List.of("Enter a country name"), 1, false));
}
String firstLetter = prefix.substring(0, 1);
List<String> countries = countryDatabase.getOrDefault(firstLetter, List.of());
List<String> matches = countries.stream()
.filter(country -> country.toLowerCase().startsWith(prefix))
.toList();
return new CompleteResult(new CompleteCompletion(matches, matches.size(), false));
}
}

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package org.springframework.ai.mcp.sample.server;
import java.util.List;
import com.logaritex.mcp.spring.SpringAiMcpAnnotationProvider;
import io.modelcontextprotocol.server.McpServerFeatures.SyncCompletionSpecification;
import io.modelcontextprotocol.server.McpServerFeatures.SyncPromptSpecification;
import io.modelcontextprotocol.server.McpServerFeatures.SyncResourceSpecification;
import org.springframework.ai.tool.ToolCallbackProvider;
import org.springframework.ai.tool.method.MethodToolCallbackProvider;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
@SpringBootApplication
public class McpServerApplication {
public static void main(String[] args) {
SpringApplication.run(McpServerApplication.class, args);
}
@Bean
public ToolCallbackProvider weatherTools(WeatherService weatherService) {
return MethodToolCallbackProvider.builder().toolObjects(weatherService).build();
}
@Bean
public List<SyncResourceSpecification> resourceSpecs(UserProfileResourceProvider userProfileResourceProvider) {
return SpringAiMcpAnnotationProvider.createSyncResourceSpecifications(List.of(userProfileResourceProvider));
}
@Bean
public List<SyncPromptSpecification> promptSpecs(PromptProvider promptProvider) {
return SpringAiMcpAnnotationProvider.createSyncPromptSpecifications(List.of(promptProvider));
}
@Bean
public List<SyncCompletionSpecification> completionSpecs(AutocompleteProvider autocompleteProvider) {
return SpringAiMcpAnnotationProvider.createSyncCompleteSpecifications(List.of(autocompleteProvider));
}
}

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/*
* Copyright 2025 - 2025 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.ai.mcp.sample.server;
import java.util.List;
import java.util.Map;
import com.logaritex.mcp.annotation.McpArg;
import com.logaritex.mcp.annotation.McpPrompt;
import io.modelcontextprotocol.server.McpSyncServerExchange;
import io.modelcontextprotocol.spec.McpSchema.GetPromptRequest;
import io.modelcontextprotocol.spec.McpSchema.GetPromptResult;
import io.modelcontextprotocol.spec.McpSchema.LoggingLevel;
import io.modelcontextprotocol.spec.McpSchema.LoggingMessageNotification;
import io.modelcontextprotocol.spec.McpSchema.PromptMessage;
import io.modelcontextprotocol.spec.McpSchema.Role;
import io.modelcontextprotocol.spec.McpSchema.TextContent;
import org.springframework.stereotype.Service;
/**
* @author Christian Tzolov
*/
@Service
public class PromptProvider {
/**
* A simple greeting prompt that takes a name parameter.
* @param name The name to greet
* @return A greeting message
*/
@McpPrompt(name = "greeting", description = "A simple greeting prompt")
public GetPromptResult greetingPrompt(
@McpArg(name = "name", description = "The name to greet", required = true) String name) {
return new GetPromptResult("Greeting", List.of(new PromptMessage(Role.ASSISTANT,
new TextContent("Hello, " + name + "! Welcome to the MCP system."))));
}
/**
* A more complex prompt that generates a personalized message.
* @param exchange The server exchange
* @param name The user's name
* @param age The user's age
* @param interests The user's interests
* @return A personalized message
*/
@McpPrompt(name = "personalized-message",
description = "Generates a personalized message based on user information")
public GetPromptResult personalizedMessage(McpSyncServerExchange exchange,
@McpArg(name = "name", description = "The user's name", required = true) String name,
@McpArg(name = "age", description = "The user's age", required = false) Integer age,
@McpArg(name = "interests", description = "The user's interests", required = false) String interests) {
exchange.loggingNotification(LoggingMessageNotification.builder()
.level(LoggingLevel.INFO)
.data("personalized-message event").build());
StringBuilder message = new StringBuilder();
message.append("Hello, ").append(name).append("!\n\n");
if (age != null) {
message.append("At ").append(age).append(" years old, you have ");
if (age < 30) {
message.append("so much ahead of you.\n\n");
}
else if (age < 60) {
message.append("gained valuable life experience.\n\n");
}
else {
message.append("accumulated wisdom to share with others.\n\n");
}
}
if (interests != null && !interests.isEmpty()) {
message.append("Your interest in ")
.append(interests)
.append(" shows your curiosity and passion for learning.\n\n");
}
message
.append("I'm here to assist you with any questions you might have about the Model Context Protocol.");
return new GetPromptResult("Personalized Message",
List.of(new PromptMessage(Role.ASSISTANT, new TextContent(message.toString()))));
}
/**
* A prompt that returns a list of messages forming a conversation.
* @param request The prompt request
* @return A list of messages
*/
@McpPrompt(name = "conversation-starter", description = "Provides a conversation starter with the system")
public List<PromptMessage> conversationStarter(GetPromptRequest request) {
return List.of(
new PromptMessage(Role.ASSISTANT,
new TextContent("Hello! I'm the MCP assistant. How can I help you today?")),
new PromptMessage(Role.USER,
new TextContent("I'd like to learn more about the Model Context Protocol.")),
new PromptMessage(Role.ASSISTANT, new TextContent(
"Great choice! The Model Context Protocol (MCP) is a standardized way for servers "
+ "to communicate with language models. It provides a structured approach for "
+ "exchanging information, making requests, and handling responses. "
+ "What specific aspect would you like to explore first?")));
}
/**
* A prompt that accepts arguments as a map.
* @param arguments The arguments map
* @return A prompt result
*/
@McpPrompt(name = "map-arguments", description = "Demonstrates using a map for arguments")
public GetPromptResult mapArguments(Map<String, Object> arguments) {
StringBuilder message = new StringBuilder("I received the following arguments:\n\n");
if (arguments != null && !arguments.isEmpty()) {
for (Map.Entry<String, Object> entry : arguments.entrySet()) {
message.append("- ").append(entry.getKey()).append(": ").append(entry.getValue()).append("\n");
}
}
else {
message.append("No arguments were provided.");
}
return new GetPromptResult("Map Arguments Demo",
List.of(new PromptMessage(Role.ASSISTANT, new TextContent(message.toString()))));
}
/**
* A prompt that returns a single PromptMessage.
* @param name The user's name
* @return A single PromptMessage
*/
@McpPrompt(name = "single-message", description = "Demonstrates returning a single PromptMessage")
public PromptMessage singleMessagePrompt(
@McpArg(name = "name", description = "The user's name", required = true) String name) {
return new PromptMessage(Role.ASSISTANT,
new TextContent("Hello, " + name + "! This is a single message response."));
}
/**
* A prompt that returns a list of strings.
* @param topic The topic to provide information about
* @return A list of strings with information about the topic
*/
@McpPrompt(name = "string-list", description = "Demonstrates returning a list of strings")
public List<String> stringListPrompt(@McpArg(name = "topic",
description = "The topic to provide information about", required = true) String topic) {
if ("MCP".equalsIgnoreCase(topic)) {
return List.of(
"The Model Context Protocol (MCP) is a standardized way for servers to communicate with language models.",
"It provides a structured approach for exchanging information, making requests, and handling responses.",
"MCP allows servers to expose resources, tools, and prompts to clients in a consistent way.");
}
else {
return List.of("I don't have specific information about " + topic + ".",
"Please try a different topic or ask a more specific question.");
}
}
}

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/*
* Copyright 2025 - 2025 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.ai.mcp.sample.server;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.logaritex.mcp.annotation.McpResource;
import io.modelcontextprotocol.server.McpSyncServerExchange;
import io.modelcontextprotocol.spec.McpSchema.ReadResourceRequest;
import io.modelcontextprotocol.spec.McpSchema.ReadResourceResult;
import io.modelcontextprotocol.spec.McpSchema.ResourceContents;
import io.modelcontextprotocol.spec.McpSchema.TextResourceContents;
import org.springframework.stereotype.Service;
/**
* @author Christian Tzolov
*/
@Service
public class UserProfileResourceProvider {
private final Map<String, Map<String, String>> userProfiles = new HashMap<>();
public UserProfileResourceProvider() {
// Initialize with some sample data
Map<String, String> johnProfile = new HashMap<>();
johnProfile.put("name", "John Smith");
johnProfile.put("email", "john.smith@example.com");
johnProfile.put("age", "32");
johnProfile.put("location", "New York");
Map<String, String> janeProfile = new HashMap<>();
janeProfile.put("name", "Jane Doe");
janeProfile.put("email", "jane.doe@example.com");
janeProfile.put("age", "28");
janeProfile.put("location", "London");
Map<String, String> bobProfile = new HashMap<>();
bobProfile.put("name", "Bob Johnson");
bobProfile.put("email", "bob.johnson@example.com");
bobProfile.put("age", "45");
bobProfile.put("location", "Tokyo");
Map<String, String> aliceProfile = new HashMap<>();
aliceProfile.put("name", "Alice Brown");
aliceProfile.put("email", "alice.brown@example.com");
aliceProfile.put("age", "36");
aliceProfile.put("location", "Sydney");
userProfiles.put("john", johnProfile);
userProfiles.put("jane", janeProfile);
userProfiles.put("bob", bobProfile);
userProfiles.put("alice", aliceProfile);
}
/**
* Resource method that takes a ReadResourceRequest parameter and URI variable.
*/
@McpResource(uri = "user-profile://{username}", name = "User Profile", description = "Provides user profile information for a specific user")
public ReadResourceResult getUserProfile(ReadResourceRequest request, String username) {
String profileInfo = formatProfileInfo(userProfiles.getOrDefault(username.toLowerCase(), new HashMap<>()));
return new ReadResourceResult(List.of(new TextResourceContents(request.uri(), "text/plain", profileInfo)));
}
/**
* Resource method that takes URI variables directly as parameters. The URI
* template in the annotation defines the variables that will be extracted.
*/
@McpResource(uri = "user-profile://{username}", name = "User Details", description = "Provides user details for a specific user using URI variables")
public ReadResourceResult getUserDetails(String username) {
String profileInfo = formatProfileInfo(userProfiles.getOrDefault(username.toLowerCase(), new HashMap<>()));
return new ReadResourceResult(
List.of(new TextResourceContents("user-profile://" + username, "text/plain", profileInfo)));
}
/**
* Resource method that takes multiple URI variables as parameters.
*/
@McpResource(uri = "user-attribute://{username}/{attribute}", name = "User Attribute", description = "Provides a specific attribute from a user's profile")
public ReadResourceResult getUserAttribute(String username, String attribute) {
Map<String, String> profile = userProfiles.getOrDefault(username.toLowerCase(), new HashMap<>());
String attributeValue = profile.getOrDefault(attribute, "Attribute not found");
return new ReadResourceResult(
List.of(new TextResourceContents("user-attribute://" + username + "/" + attribute, "text/plain",
username + "'s " + attribute + ": " + attributeValue)));
}
/**
* Resource method that takes an exchange and URI variables.
*/
@McpResource(uri = "user-profile-exchange://{username}", name = "User Profile with Exchange", description = "Provides user profile information with server exchange context")
public ReadResourceResult getProfileWithExchange(McpSyncServerExchange exchange, String username) {
String profileInfo = formatProfileInfo(userProfiles.getOrDefault(username.toLowerCase(), new HashMap<>()));
return new ReadResourceResult(List.of(new TextResourceContents("user-profile-exchange://" + username,
"text/plain", "Profile with exchange for " + username + ": " + profileInfo)));
}
/**
* Resource method that takes a String URI variable parameter.
*/
@McpResource(uri = "user-connections://{username}", name = "User Connections", description = "Provides a list of connections for a specific user")
public List<String> getUserConnections(String username) {
// Generate a simple list of connections based on username
return List.of(username + " is connected with Alice", username + " is connected with Bob",
username + " is connected with Charlie");
}
/**
* Resource method that takes both McpSyncServerExchange, ReadResourceRequest
* and
* URI variable parameters.
*/
@McpResource(uri = "user-notifications://{username}", name = "User Notifications", description = "Provides notifications for a specific user")
public List<ResourceContents> getUserNotifications(McpSyncServerExchange exchange, ReadResourceRequest request,
String username) {
// Generate notifications based on username
String notifications = generateNotifications(username);
return List.of(new TextResourceContents(request.uri(), "text/plain", notifications));
}
/**
* Resource method that returns a single ResourceContents with TEXT content
* type.
*/
@McpResource(uri = "user-status://{username}", name = "User Status", description = "Provides the current status for a specific user")
public ResourceContents getUserStatus(ReadResourceRequest request, String username) {
// Generate a simple status based on username
String status = generateUserStatus(username);
return new TextResourceContents(request.uri(), "text/plain", status);
}
/**
* Resource method that returns a single String with TEXT content type.
*/
@McpResource(uri = "user-location://{username}", name = "User Location", description = "Provides the current location for a specific user")
public String getUserLocation(String username) {
Map<String, String> profile = userProfiles.getOrDefault(username.toLowerCase(), new HashMap<>());
// Extract location from profile data
return profile.getOrDefault("location", "Location not available");
}
/**
* Resource method that returns a single String with BLOB content type. This
* demonstrates how a String can be treated as binary data.
*/
@McpResource(uri = "user-avatar://{username}", name = "User Avatar", description = "Provides a base64-encoded avatar image for a specific user", mimeType = "image/png")
public String getUserAvatar(ReadResourceRequest request, String username) {
// In a real implementation, this would be a base64-encoded image
// For this example, we're just returning a placeholder string
return "base64-encoded-avatar-image-for-" + username;
}
private String formatProfileInfo(Map<String, String> profile) {
if (profile.isEmpty()) {
return "User profile not found";
}
StringBuilder sb = new StringBuilder();
for (Map.Entry<String, String> entry : profile.entrySet()) {
sb.append(entry.getKey()).append(": ").append(entry.getValue()).append("\n");
}
return sb.toString().trim();
}
private String generateNotifications(String username) {
// Simple logic to generate notifications
return "You have 3 new messages\n" + "2 people viewed your profile\n" + "You have 1 new connection request";
}
private String generateUserStatus(String username) {
// Simple logic to generate a status
if (username.equals("john")) {
return "🟢 Online";
} else if (username.equals("jane")) {
return "🟠 Away";
} else if (username.equals("bob")) {
return "⚪ Offline";
} else if (username.equals("alice")) {
return "🔴 Busy";
} else {
return "⚪ Offline";
}
}
}

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/*
* Copyright 2024 - 2024 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.ai.mcp.sample.server;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonProperty;
import org.springframework.ai.tool.annotation.Tool;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestClient;
import org.springframework.web.client.RestClientException;
@Service
public class WeatherService {
private static final String BASE_URL = "https://api.weather.gov";
private final RestClient restClient;
public WeatherService() {
this.restClient = RestClient.builder()
.baseUrl(BASE_URL)
.defaultHeader("Accept", "application/geo+json")
.defaultHeader("User-Agent", "WeatherApiClient/1.0 (your@email.com)")
.build();
}
@JsonIgnoreProperties(ignoreUnknown = true)
public record Points(@JsonProperty("properties") Props properties) {
@JsonIgnoreProperties(ignoreUnknown = true)
public record Props(@JsonProperty("forecast") String forecast) {
}
}
@JsonIgnoreProperties(ignoreUnknown = true)
public record Forecast(@JsonProperty("properties") Props properties) {
@JsonIgnoreProperties(ignoreUnknown = true)
public record Props(@JsonProperty("periods") List<Period> periods) {
}
@JsonIgnoreProperties(ignoreUnknown = true)
public record Period(@JsonProperty("number") Integer number, @JsonProperty("name") String name,
@JsonProperty("startTime") String startTime, @JsonProperty("endTime") String endTime,
@JsonProperty("isDaytime") Boolean isDayTime, @JsonProperty("temperature") Integer temperature,
@JsonProperty("temperatureUnit") String temperatureUnit,
@JsonProperty("temperatureTrend") String temperatureTrend,
@JsonProperty("probabilityOfPrecipitation") Map probabilityOfPrecipitation,
@JsonProperty("windSpeed") String windSpeed, @JsonProperty("windDirection") String windDirection,
@JsonProperty("icon") String icon, @JsonProperty("shortForecast") String shortForecast,
@JsonProperty("detailedForecast") String detailedForecast) {
}
}
@JsonIgnoreProperties(ignoreUnknown = true)
public record Alert(@JsonProperty("features") List<Feature> features) {
@JsonIgnoreProperties(ignoreUnknown = true)
public record Feature(@JsonProperty("properties") Properties properties) {
}
@JsonIgnoreProperties(ignoreUnknown = true)
public record Properties(@JsonProperty("event") String event, @JsonProperty("areaDesc") String areaDesc,
@JsonProperty("severity") String severity, @JsonProperty("description") String description,
@JsonProperty("instruction") String instruction) {
}
}
/**
* Get forecast for a specific latitude/longitude
* @param latitude Latitude
* @param longitude Longitude
* @return The forecast for the given location
* @throws RestClientException if the request fails
*/
@Tool(description = "Get weather forecast for a specific latitude/longitude")
public String getWeatherForecastByLocation(double latitude, double longitude) {
var points = restClient.get()
.uri("/points/{latitude},{longitude}", latitude, longitude)
.retrieve()
.body(Points.class);
var forecast = restClient.get().uri(points.properties().forecast()).retrieve().body(Forecast.class);
String forecastText = forecast.properties().periods().stream().map(p -> {
return String.format("""
%s:
Temperature: %s %s
Wind: %s %s
Forecast: %s
""", p.name(), p.temperature(), p.temperatureUnit(), p.windSpeed(), p.windDirection(),
p.detailedForecast());
}).collect(Collectors.joining());
return forecastText;
}
/**
* Get alerts for a specific area
* @param state Area code. Two-letter US state code (e.g. CA, NY)
* @return Human readable alert information
* @throws RestClientException if the request fails
*/
@Tool(description = "Get weather alerts for a US state. Input is Two-letter US state code (e.g. CA, NY)")
public String getAlerts(String state) {
Alert alert = restClient.get().uri("/alerts/active/area/{state}", state).retrieve().body(Alert.class);
return alert.features()
.stream()
.map(f -> String.format("""
Event: %s
Area: %s
Severity: %s
Description: %s
Instructions: %s
""", f.properties().event(), f.properties.areaDesc(), f.properties.severity(),
f.properties.description(), f.properties.instruction()))
.collect(Collectors.joining("\n"));
}
public static void main(String[] args) {
WeatherService client = new WeatherService();
System.out.println(client.getWeatherForecastByLocation(47.6062, -122.3321));
System.out.println(client.getAlerts("NY"));
}
}

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@@ -0,0 +1,13 @@
# spring.main.web-application-type=none
# NOTE: You must disable the banner and the console logging
# to allow the STDIO transport to work !!!
spring.main.banner-mode=off
# logging.pattern.console=
# spring.ai.mcp.server.stdio=false
spring.ai.mcp.server.name=my-weather-server
spring.ai.mcp.server.version=0.0.1
logging.file.name=./model-context-protocol/weather/starter-webmvc-server/target/starter-webmvc-server.log

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@@ -0,0 +1,33 @@
/*
* Copyright 2024 - 2024 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.ai.mcp.sample.client;
import io.modelcontextprotocol.client.transport.HttpClientSseClientTransport;
/**
* @author Christian Tzolov
*/
public class ClientSse {
public static void main(String[] args) {
var transport = HttpClientSseClientTransport.builder("http://localhost:8080").build();
new SampleClient(transport).run();
}
}

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@@ -0,0 +1,49 @@
/*
* Copyright 2024 - 2024 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.ai.mcp.sample.client;
import java.io.File;
import io.modelcontextprotocol.client.transport.ServerParameters;
import io.modelcontextprotocol.client.transport.StdioClientTransport;
/**
* With stdio transport, the MCP server is automatically started by the client.
* But you
* have to build the server jar first:
*
* <pre>
* ./mvnw clean install -DskipTests
* </pre>
*/
public class ClientStdio {
public static void main(String[] args) {
System.out.println(new File(".").getAbsolutePath());
var stdioParams = ServerParameters.builder("java")
.args("-Dspring.ai.mcp.server.stdio=true", "-Dspring.main.web-application-type=none",
"-Dlogging.pattern.console=", "-jar",
"model-context-protocol/weather/starter-webmvc-server/target/mcp-weather-starter-webmvc-server-0.0.1-SNAPSHOT.jar")
.build();
var transport = new StdioClientTransport(stdioParams);
new SampleClient(transport).run();
}
}

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@@ -0,0 +1,97 @@
/*
* Copyright 2024 - 2024 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.ai.mcp.sample.client;
import java.util.Map;
import io.modelcontextprotocol.client.McpClient;
import io.modelcontextprotocol.spec.McpClientTransport;
import io.modelcontextprotocol.spec.McpSchema.CallToolRequest;
import io.modelcontextprotocol.spec.McpSchema.CallToolResult;
import io.modelcontextprotocol.spec.McpSchema.CompleteRequest;
import io.modelcontextprotocol.spec.McpSchema.CompleteResult;
import io.modelcontextprotocol.spec.McpSchema.GetPromptRequest;
import io.modelcontextprotocol.spec.McpSchema.GetPromptResult;
import io.modelcontextprotocol.spec.McpSchema.ListToolsResult;
import io.modelcontextprotocol.spec.McpSchema.ReadResourceRequest;
import io.modelcontextprotocol.spec.McpSchema.ReadResourceResult;
import io.modelcontextprotocol.spec.McpSchema.ResourceReference;
import io.modelcontextprotocol.spec.McpSchema.PromptReference;
/**
* @author Christian Tzolov
*/
public class SampleClient {
private final McpClientTransport transport;
public SampleClient(McpClientTransport transport) {
this.transport = transport;
}
public void run() {
var client = McpClient.sync(this.transport)
.loggingConsumer(message -> {
System.out.println(">> Client Logging: " + message);
})
.build();
client.initialize();
client.ping();
// List and demonstrate tools
ListToolsResult toolsList = client.listTools();
System.out.println("Available Tools = " + toolsList);
toolsList.tools().stream().forEach(tool -> {
System.out.println("Tool: " + tool.name() + ", description: " + tool.description() + ", schema: "
+ tool.inputSchema());
});
CallToolResult weatherForcastResult = client.callTool(new CallToolRequest("getWeatherForecastByLocation",
Map.of("latitude", "47.6062", "longitude", "-122.3321")));
System.out.println("Weather Forcast: " + weatherForcastResult);
// // Resources
ReadResourceResult resource = client.readResource(new ReadResourceRequest("user-status://alice"));
System.out.println("Resource = " + resource);
// Prompts
GetPromptResult prompt = client.getPrompt(
new GetPromptRequest("personalized-message", Map.of("name", "Alice", "age", "14", "interests", "AI")));
System.out.println("Prompt = " + prompt);
// Completions
CompleteResult completion = client.completeCompletion(new CompleteRequest(new ResourceReference("user-status://{username}"),
new CompleteRequest.CompleteArgument("username", "a")));
System.out.println("Completion = " + completion);
CompleteResult completion2 = client.completeCompletion(new CompleteRequest(new PromptReference("personalized-message"),
new CompleteRequest.CompleteArgument("name", "a")));
System.out.println("Completion2 = " + completion2);
client.closeGracefully();
}
}

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@@ -41,6 +41,8 @@
<module>model-context-protocol/web-search/brave-chatbot</module>
<module>model-context-protocol/sampling/mcp-weather-webmvc-server</module>
<module>model-context-protocol/sampling/mcp-sampling-client</module>
<module>model-context-protocol/mcp-annotations-server</module>
<module>model-context-protocol/dynamic-tool-update/client</module>
<module>model-context-protocol/dynamic-tool-update/server</module>