feat(samples/cloudwatch-applicationsignals-mcp): add docker java springboot app

samples/cloudwatch-applicationsignals-mcp/get-enablement-guide-samples/README.md

@@ -48,9 +48,10 @@ docker buildx build --platform linux/amd64,linux/arm64 \
   .
 ```
 
-| Language-Framework | App Directory            | ECR Repo     |
-|--------------------|--------------------------|--------------|
-| python-flask       | docker-apps/python/flask | python-flask |
+| Language-Framework | App Directory                | ECR Repo        |
+|--------------------|------------------------------|-----------------|
+| python-flask       | docker-apps/python/flask     | python-flask    |
+| java-springboot    | docker-apps/java/spring-boot | java-springboot |
 
 ##### Deploy & Cleanup Containerized Infrastructure
 
@@ -67,6 +68,7 @@ cdk deploy <stack-name>
 cdk destroy <stack-name>
 ```
 
-| Language-Framework | Stack Name          |
-|--------------------|---------------------|
-| python-flask       | PythonFlaskCdkStack |
+| Language-Framework | Stack Name             |
+|--------------------|------------------------|
+| python-flask       | PythonFlaskCdkStack    |
+| java-springboot    | JavaSpringBootCdkStack |

samples/cloudwatch-applicationsignals-mcp/get-enablement-guide-samples/docker-apps/java/spring-boot/Dockerfile

@@ -0,0 +1,37 @@
+## Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+## SPDX-License-Identifier: Apache-2.0
+
+FROM public.ecr.aws/docker/library/maven:3.9-amazoncorretto-17 AS build
+
+WORKDIR /app
+
+COPY pom.xml .
+RUN mvn dependency:go-offline
+
+COPY src ./src
+RUN mvn clean package -DskipTests
+
+FROM public.ecr.aws/docker/library/amazoncorretto:17-alpine
+
+RUN apk add --no-cache curl bash && \
+    addgroup -g 1001 -S appuser && \
+    adduser -u 1001 -S appuser -G appuser
+
+WORKDIR /app
+
+COPY --from=build /app/target/*.jar app.jar
+COPY generate-traffic.sh .
+
+RUN chmod +x generate-traffic.sh && \
+    chown -R appuser:appuser /app
+
+USER appuser
+
+ENV PORT=8080
+
+EXPOSE 8080
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:${PORT}/health || exit 1
+
+CMD ["sh", "-c", "java ${JAVA_OPTS:--XX:MaxRAMPercentage=75.0 -XX:+ExitOnOutOfMemoryError} -jar app.jar"]

samples/cloudwatch-applicationsignals-mcp/get-enablement-guide-samples/docker-apps/java/spring-boot/generate-traffic.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# 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
+#
+#     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.
+
+PORT=${PORT:-8080}
+BASE_URL="http://localhost:${PORT}"
+
+echo "Starting continuous traffic generation to ${BASE_URL}"
+
+while true; do
+    echo "[$(date '+%H:%M:%S')] Generating traffic..."
+
+    curl -sf "${BASE_URL}/health" > /dev/null
+    if [ $? -ne 0 ]; then
+        echo "[$(date '+%H:%M:%S')] ERROR: Health check failed!"
+    fi
+
+    curl -sf "${BASE_URL}/api/buckets" > /dev/null
+    if [ $? -ne 0 ]; then
+        echo "[$(date '+%H:%M:%S')] ERROR: API call to /api/buckets failed!"
+    fi
+
+    sleep 2
+done

samples/cloudwatch-applicationsignals-mcp/get-enablement-guide-samples/docker-apps/java/spring-boot/pom.xml

@@ -0,0 +1,55 @@
+<?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>
+
+    <groupId>com.application</groupId>
+    <artifactId>springboot-application</artifactId>
+    <version>1.0.0</version>
+    <packaging>jar</packaging>
+
+    <name>Spring Boot Application</name>
+    <description>Spring Boot application for AWS Application Signals testing</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.2.0</version>
+        <relativePath/>
+    </parent>
+
+    <properties>
+        <java.version>17</java.version>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>software.amazon.awssdk</groupId>
+            <artifactId>s3</artifactId>
+            <version>2.20.0</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-logging</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>

samples/cloudwatch-applicationsignals-mcp/get-enablement-guide-samples/docker-apps/java/spring-boot/src/main/java/com/application/springboot/Application.java

@@ -0,0 +1,11 @@
+package com.application.springboot;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

samples/cloudwatch-applicationsignals-mcp/get-enablement-guide-samples/docker-apps/java/spring-boot/src/main/java/com/application/springboot/Controller.java

@@ -0,0 +1,58 @@
+package com.application.springboot;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import software.amazon.awssdk.services.s3.S3Client;
+import software.amazon.awssdk.services.s3.model.ListBucketsResponse;
+
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+@RestController
+public class Controller {
+    private static final Logger logger = LoggerFactory.getLogger(Controller.class);
+    private final S3Client s3Client;
+    private final ObjectMapper objectMapper;
+
+    public Controller() {
+        this.s3Client = S3Client.builder().build();
+        this.objectMapper = new ObjectMapper();
+    }
+
+    @GetMapping(value = "/", produces = MediaType.APPLICATION_JSON_VALUE)
+    public String index() throws Exception {
+        return healthCheck();
+    }
+
+    @GetMapping(value = "/health", produces = MediaType.APPLICATION_JSON_VALUE)
+    public String healthCheck() throws Exception {
+        logger.info("Health check endpoint called");
+        Map<String, String> response = Map.of("status", "healthy");
+        return objectMapper.writeValueAsString(response) + "\n";
+    }
+
+    @GetMapping(value = "/api/buckets", produces = MediaType.APPLICATION_JSON_VALUE)
+    public String listBuckets() throws Exception {
+        try {
+            ListBucketsResponse response = s3Client.listBuckets();
+            List<String> buckets = response.buckets().stream()
+                    .map(bucket -> bucket.name())
+                    .collect(Collectors.toList());
+            logger.info("Successfully listed " + buckets.size() + " S3 buckets");
+            Map<String, Object> responseMap = Map.of(
+                "bucket_count", buckets.size(),
+                "buckets", buckets
+            );
+            return objectMapper.writeValueAsString(responseMap) + "\n";
+        } catch (Exception e) {
+            logger.error("Exception thrown when Listing Buckets: " + e.getMessage());
+            Map<String, String> errorResponse = Map.of("error", "Failed to retrieve S3 buckets");
+            return objectMapper.writeValueAsString(errorResponse) + "\n";
+        }
+    }
+}

samples/cloudwatch-applicationsignals-mcp/get-enablement-guide-samples/docker-apps/java/spring-boot/src/main/resources/application.properties

@@ -0,0 +1,3 @@
+server.port=${PORT:8080}
+logging.level.root=INFO
+logging.level.com.example.springboot=INFO