BAEL-4331 (#10460)

* BAEL-4331

* Add an integration test

spring-boot-modules/pom.xml

@@ -62,6 +62,7 @@
         <module>spring-boot-properties-3</module>
         <module>spring-boot-property-exp</module>
         <module>spring-boot-runtime</module>
+        <module>spring-boot-runtime-2</module>
         <module>spring-boot-security</module>
         <module>spring-boot-springdoc</module>
         <module>spring-boot-swagger</module>

spring-boot-modules/spring-boot-runtime-2/README.md

@@ -0,0 +1,6 @@
+## Spring Boot Runtime 2
+
+This module contains articles about administering a Spring Boot runtime
+
+### Relevant Articles:									
+ - 

spring-boot-modules/spring-boot-runtime-2/pom.xml

@@ -0,0 +1,66 @@
+<?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>com.baeldung.spring-boot-modules</groupId>
+        <artifactId>spring-boot-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../</relativePath>
+    </parent>
+
+    <artifactId>spring-boot-runtime-2</artifactId>
+    <packaging>jar</packaging>
+
+    <name>spring-boot-runtime-2</name>
+    <description>Demo project for Spring Boot</description>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>${project.artifactId}</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources/heap</directory>
+                <targetPath>${project.build.directory}</targetPath>
+                <filtering>true</filtering>
+                <includes>
+                    <include>${project.name}.conf</include>
+                </includes>
+            </resource>
+        </resources>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <configuration>
+                            <mainClass>com.baeldung.heap.HeapSizeDemoApplication</mainClass>
+                        </configuration>
+                    </execution>
+                </executions>
+                <configuration>
+                    <executable>true</executable>
+                    <jvmArguments>
+                        -Xms256m
+                        -Xmx1g
+                    </jvmArguments>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

spring-boot-modules/spring-boot-runtime-2/src/main/java/com/baeldung/heap/HeapSizeDemoApplication.java

@@ -0,0 +1,12 @@
+package com.baeldung.heap;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class HeapSizeDemoApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(HeapSizeDemoApplication.class, args);
+    }
+}

spring-boot-modules/spring-boot-runtime-2/src/main/java/com/baeldung/heap/MemoryStats.java

@@ -0,0 +1,31 @@
+package com.baeldung.heap;
+
+public class MemoryStats {
+    private long heapSize;
+    private long heapMaxSize;
+    private long heapFreeSize;
+    
+    public long getHeapSize() {
+        return heapSize;
+    }
+    
+    public void setHeapSize(long heapSize) {
+        this.heapSize = heapSize;
+    }
+    
+    public long getHeapMaxSize() {
+        return heapMaxSize;
+    }
+    
+    public void setHeapMaxSize(long heapMaxSize) {
+        this.heapMaxSize = heapMaxSize;
+    }
+    
+    public long getHeapFreeSize() {
+        return heapFreeSize;
+    }
+    
+    public void setHeapFreeSize(long heapFreeSize) {
+        this.heapFreeSize = heapFreeSize;
+    }
+}

spring-boot-modules/spring-boot-runtime-2/src/main/java/com/baeldung/heap/MemoryStatusController.java

@@ -0,0 +1,20 @@
+package com.baeldung.heap;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class MemoryStatusController {
+
+    @GetMapping("memory-status")
+    public MemoryStats getMemoryStatistics() {
+        MemoryStats stats = new MemoryStats();
+        stats.setHeapSize(Runtime.getRuntime()
+            .totalMemory());
+        stats.setHeapMaxSize(Runtime.getRuntime()
+            .maxMemory());
+        stats.setHeapFreeSize(Runtime.getRuntime()
+            .freeMemory());
+        return stats;
+    }
+}

spring-boot-modules/spring-boot-runtime-2/src/main/resources/heap/spring-boot-runtime-2.conf

@@ -0,0 +1 @@
+JAVA_OPTS="-Xms512m -Xmx1024m"

spring-boot-modules/spring-boot-runtime-2/src/test/java/com/baeldung/heap/MemoryStatusControllerIntegrationTest.java

@@ -0,0 +1,32 @@
+package com.baeldung.heap;
+
+import static org.hamcrest.Matchers.notANumber;
+import static org.hamcrest.Matchers.not;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+
+@RunWith(SpringRunner.class)
+@WebMvcTest(MemoryStatusController.class)
+public class MemoryStatusControllerIntegrationTest {
+
+    @Autowired
+    private MockMvc mvc;
+
+    @Test
+    public void whenGetMemoryStatistics_thenReturnJsonArray() throws Exception {
+        mvc.perform(get("/memory-status").contentType(MediaType.APPLICATION_JSON))
+            .andExpect(status().isOk())
+            .andExpect(jsonPath("heapSize", not(notANumber())))
+            .andExpect(jsonPath("heapMaxSize", not(notANumber())))
+            .andExpect(jsonPath("heapFreeSize", not(notANumber())));
+    }
+}