[WIP] [BAEL-9370] Introduced module with spring-data-jpa repositories:

persistence-modules/pom.xml

@@ -109,6 +109,7 @@
         <module>spring-data-jpa-repo</module>
         <module>spring-data-jpa-repo-2</module>
         <module>spring-data-jpa-repo-4</module>
+        <module>spring-data-jpa-repo-5</module>
         <module>spring-data-jdbc</module>
         <module>spring-data-jpa-simple</module>
         <module>spring-data-keyvalue</module>

persistence-modules/spring-data-jpa-repo-5/pom.xml

@@ -0,0 +1,27 @@
+<?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.baeldung</groupId>
+    <artifactId>spring-data-jpa-repo-5</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>pom</packaging>
+
+    <modules>
+        <module>spring-data-jpa-aot</module>
+        <module>spring-data-jpa-aot-repository</module>
+        <module>spring-data-jpa-not-aot</module>
+    </modules>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>4.0.0-RC1</version>
+    </parent>
+
+    <properties>
+        <java.version>25</java.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+</project>

persistence-modules/spring-data-jpa-repo-5/scripts/load-test.sh

@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+APP_COMMAND=""
+
+case "$1" in
+  aot)
+    APP_COMMAND="java -Dspring.aot.enabled=true \
+                     -Dspring.aot.repositories.enabled=false \
+                     -agentlib:native-image-agent=config-output-dir=target/native-image-hints \
+                     -jar spring-data-jpa-aot/target/spring-data-jpa-aot-0.0.1-SNAPSHOT.jar"
+    ;;
+  aot-repo)
+    APP_COMMAND="java -Dspring.aot.enabled=true \
+                      -Dspring.aot.repositories.enabled=true \
+                      -agentlib:native-image-agent=config-output-dir=target/native-image-hints \
+                      -jar spring-data-jpa-aot-repository/target/spring-data-jpa-aot-repository-0.0.1-SNAPSHOT.jar"
+    ;;
+  non-aot)
+    APP_COMMAND="java -jar spring-data-jpa-not-aot/target/spring-data-jpa-not-aot-0.0.1-SNAPSHOT.jar"
+    ;;
+  *)
+    echo "Error: Unknown mode '$1'. Use 'aot', 'aot-repo' or 'non-aot'."
+    exit 1
+    ;;
+esac
+
+# --- 1. Start your script in the background ---
+# Record start time in milliseconds
+start_ns=$(date +%s%N)
+$APP_COMMAND &
+APP_PID=$!
+echo "Started APP with PID $APP_PID"
+
+# --- 2. Start sampling in the background ---
+sudo sample $APP_PID > sample_output.txt &
+SAMPLE_PID=$!
+echo "Sampling process started (PID $SAMPLE_PID)"
+echo "Waiting for service at http://localhost:8080/get-user ..."
+
+# --- 3. Poll the endpoint until it returns HTTP 200 ---
+while [ "$(curl -s -o /dev/null -L -w ''%{http_code}'' http://localhost:8080/get-user)" != 200 ]
+  do sleep 0.001;
+done
+
+# Capture elapsed time (SECONDS has fractional part) and the memory info
+end_ns=$(date +%s%N)
+elapsed_ms=$(((end_ns - start_ns) / 1000000))
+MEMINFO_START=$(ps -o rss,vsz,pcpu,time -p $APP_PID | tail -1)
+
+## load test
+ab -n 1000 -t 10 -c 50 http://localhost:8080/get-user/ > ab_output.txt
+MEMINFO_END=$(ps -o rss,vsz,pcpu,time -p $APP_PID | tail -1)
+
+## --- 4. Stop sampling and show results ---
+#echo "Stopping sample..."
+#sudo kill -INT "$SAMPLE_PID"
+#wait "$SAMPLE_PID" 2>/dev/null || true
+#
+## Give sample a moment to flush output
+#sleep 2
+
+# --- 5. Clean up ---
+echo "Stopping startup process..."
+kill "$APP_PID" 2>/dev/null || true
+
+# Give app a moment to shutdown
+sleep 3
+
+echo "Done."
+
+THREADS=$(grep -E "Thread_[0-9]+" sample_output.txt | wc -l)
+echo "time elapsed $elapsed_ms millis"
+echo "Threads: $THREADS"
+echo "Memory/CPU START (RSS KB / VSZ KB / %CPU / CPU Time): $MEMINFO_START"
+echo "Memory/CPU END (RSS KB / VSZ KB / %CPU / CPU Time): $MEMINFO_END"

persistence-modules/spring-data-jpa-repo-5/scripts/startup.sh

@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+APP_COMMAND=""
+
+case "$1" in
+  aot)
+    APP_COMMAND="java -Dspring.aot.enabled=true \
+                     -Dspring.aot.repositories.enabled=false \
+                     -agentlib:native-image-agent=config-output-dir=target/native-image-hints \
+                     -jar spring-data-jpa-aot/target/spring-data-jpa-aot-0.0.1-SNAPSHOT.jar"
+    ;;
+  aot-repo)
+    APP_COMMAND="java -Dspring.aot.enabled=true \
+                      -Dspring.aot.repositories.enabled=true \
+                      -agentlib:native-image-agent=config-output-dir=target/native-image-hints \
+                      -jar spring-data-jpa-aot-repository/target/spring-data-jpa-aot-repository-0.0.1-SNAPSHOT.jar"
+    ;;
+  non-aot)
+    APP_COMMAND="java -jar spring-data-jpa-not-aot/target/spring-data-jpa-not-aot-0.0.1-SNAPSHOT.jar"
+    ;;
+  *)
+    echo "Error: Unknown mode '$1'. Use 'aot', 'aot-repo' or 'non-aot'."
+    exit 1
+    ;;
+esac
+
+# --- 1. Start your script in the background ---
+# Record start time in milliseconds
+start_ns=$(date +%s%N)
+$APP_COMMAND &
+APP_PID=$!
+echo "Started APP with PID $APP_PID"
+
+# --- 2. Start sampling in the background ---
+sudo sample $APP_PID > sample_output.txt &
+SAMPLE_PID=$!
+echo "Sampling process started (PID $SAMPLE_PID)"
+echo "Waiting for service at http://localhost:8080/get-user ..."
+
+# --- 3. Poll the endpoint until it returns HTTP 200 ---
+while [ "$(curl -s -o /dev/null -L -w ''%{http_code}'' http://localhost:8080/get-user)" != 200 ]
+  do sleep 0.001;
+done
+
+# Capture elapsed time (SECONDS has fractional part) and the memory info
+end_ns=$(date +%s%N)
+elapsed_ms=$(((end_ns - start_ns) / 1000000))
+MEMINFO=$(ps -o rss,vsz,pcpu,time -p $APP_PID | tail -1)
+
+## --- 4. Stop sampling and show results ---
+#echo "Stopping sample..."
+#sudo kill -INT "$SAMPLE_PID"
+#wait "$SAMPLE_PID" 2>/dev/null || true
+#
+## Give sample a moment to flush output
+#sleep 2
+
+# --- 5. Clean up ---
+echo "Stopping startup process..."
+kill "$APP_PID" 2>/dev/null || true
+
+# Give app a moment to shutdown
+sleep 3
+
+echo "Done."
+
+THREADS=$(grep -E "Thread_[0-9]+" sample_output.txt | wc -l)
+echo "time elapsed $elapsed_ms millis"
+echo "Threads: $THREADS"
+echo "Memory/CPU (RSS KB / VSZ KB / %CPU / CPU Time): $MEMINFO"

persistence-modules/spring-data-jpa-repo-5/spring-data-jpa-aot-repository/README.md

@@ -0,0 +1,53 @@
+Compile AOT
+
+```shell
+mvn clean install -Paot-repo
+```
+
+Compilation time: `14.200 s`
+
+1) run using maven and the spring-boot plugin:
+
+```shell
+mvn spring-boot:run -Dspring.aot.enabled=true -Dspring.aot.repositories.enabled=true
+```
+
+Startup times:
+`Root WebApplicationContext: initialization completed in 477 ms`
+`Started Application in 2.031 seconds`
+
+2) run using the jar (same as 1 mostly)
+
+```shell
+java -Dspring.aot.enabled=true \
+     -Dspring.aot.repositories.enabled=true \
+     -agentlib:native-image-agent=config-output-dir=target/native-image-hints \
+     -jar target/spring-data-jpa-aot-repository-0.0.1-SNAPSHOT.jar
+```
+
+Startup times:
+`Root WebApplicationContext: initialization completed in 452 ms`
+`Started Application in 3.26 seconds`
+
+## Performance
+
+### Time startup
+from root `sudo ./scripts/startup.sh aot-repo`:
+```shell
+time elapsed 5296 millis
+Threads:       58
+Memory/CPU (RSS KB / VSZ KB / %CPU / CPU Time): 406992 523697872 167.5   0:10.91
+```
+
+### Time startup
+from root `sudo ./scripts/load-test.sh aot-repo`:
+```shell
+time elapsed 5298 millis
+Threads:       93
+Memory/CPU START (RSS KB / VSZ KB / %CPU / CPU Time): 450816 557256448 205.1   0:11.72
+Memory/CPU END (RSS KB / VSZ KB / %CPU / CPU Time): 439568 523846176 830.3   1:18.58
+```
+
+**NOTE**:
+AOT is a mandatory step to transform a Spring application to a native executable, so it is automatically enabled when running within a native image. However it is also possible to use AOT optimizations on the JVM by setting the spring.aot.enabled System
+property to true.

persistence-modules/spring-data-jpa-repo-5/spring-data-jpa-aot-repository/ab_output.txt

@@ -0,0 +1,43 @@
+This is ApacheBench, Version 2.3 <$Revision: 1913912 $>
+Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
+Licensed to The Apache Software Foundation, http://www.apache.org/
+
+Benchmarking localhost (be patient)
+
+
+Server Software:        
+Server Hostname:        localhost
+Server Port:            8080
+
+Document Path:          /get-user/
+Document Length:        93 bytes
+
+Concurrency Level:      50
+Time taken for tests:   10.002 seconds
+Complete requests:      1501
+Failed requests:        0
+Non-2xx responses:      1504
+Total transferred:      297792 bytes
+HTML transferred:       139872 bytes
+Requests per second:    150.07 [#/sec] (mean)
+Time per request:       333.186 [ms] (mean)
+Time per request:       6.664 [ms] (mean, across all concurrent requests)
+Transfer rate:          29.07 [Kbytes/sec] received
+
+Connection Times (ms)
+              min  mean[+/-sd] median   max
+Connect:        0    0   1.0      0       6
+Processing:    34  327 179.9    307     836
+Waiting:       32  307 170.7    292     795
+Total:         34  327 180.2    307     840
+
+Percentage of the requests served within a certain time (ms)
+  50%    307
+  66%    402
+  75%    468
+  80%    502
+  90%    576
+  95%    625
+  98%    685
+  99%    723
+ 100%    840 (longest request)

persistence-modules/spring-data-jpa-repo-5/spring-data-jpa-aot-repository/pom.xml

@@ -0,0 +1,67 @@
+<?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>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>spring-data-jpa-repo-5</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../spring-data-jpa-repo-5</relativePath>
+    </parent>
+
+    <artifactId>spring-data-jpa-aot-repository</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <profiles>
+        <profile>
+            <id>aot-repo</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.springframework.boot</groupId>
+                        <artifactId>spring-boot-maven-plugin</artifactId>
+                        <configuration>
+                            <mainClass>com.baeldung.spring.aotrepository.Application</mainClass>
+                            <jvmArguments>
+                                -agentlib:native-image-agent=config-output-dir=target/native-image-hints/
+                            </jvmArguments>
+                        </configuration>
+                        <executions>
+                            <execution>
+                                <id>process-aot</id>
+                                <goals>
+                                    <goal>process-aot</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+</project>

persistence-modules/spring-data-jpa-repo-5/spring-data-jpa-aot-repository/src/main/java/com/baeldung/spring/aotrepository/Application.java

@@ -0,0 +1,18 @@
+package com.baeldung.spring.aotrepository;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+    private static final Log logger = LogFactory.getLog(Application.class);
+
+    public static void main(String[] args) {
+        logger.info("Application starts..");
+
+        SpringApplication.run(Application.class, args);
+    }
+}