spring-actuator-demo starter

jdk_8_maven/cs/rest/original/spring-actuator-demo/Readme.md

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+# Spring Boot Actuator: Health Check, Auditing, Metrics Gathering and Monitoring 
+
+## Tutorials 
+
+1. [Spring Boot Actuator: Health check, Auditing, Metrics gathering and Monitoring](https://www.callicoder.com/spring-boot-actuator/)
+2. [Spring Boot Actuator metrics monitoring with Prometheus and Grafana](https://www.callicoder.com/spring-boot-actuator-metrics-monitoring-dashboard-prometheus-grafana/)
+
+## Steps to Setup
+
+**1. Clone the application**
+
+```bash
+git clone https://github.com/callicoder/spring-boot-actuator-demo.git
+```
+
+**2. Build and run the app using maven**
+
+```bash
+mvn package
+java -jar target/actuator-demo-0.0.1-SNAPSHOT.jar
+```
+
+Alternatively, you can run the app directly without packaging like this -
+
+```bash
+mvn spring-boot:run
+```
+
+The app will start running at <http://localhost:8080>.
+
+## Explore Actuator Endpoints
+
+All the actuator endpoints will be available at <http://localhost:8080/actuator>.
+
+Some of the actuator endpoints are protected with Spring Security's HTTP Basic Authentication. You can use the username `actuator` and password `actuator` for http basic authentication.

jdk_8_maven/cs/rest/original/spring-actuator-demo/pom.xml

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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>
+
+	<groupId>com.example</groupId>
+	<artifactId>actuator-demo</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<packaging>jar</packaging>
+
+	<name>actuator-demo</name>
+	<description>Spring Boot Actuator Demo Project</description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.2.1.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-security</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<!-- Micrometer Prometheus registry  -->
+		<dependency>
+			<groupId>io.micrometer</groupId>
+			<artifactId>micrometer-registry-prometheus</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.security</groupId>
+			<artifactId>spring-security-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+
+</project>

jdk_8_maven/cs/rest/original/spring-actuator-demo/src/main/java/com/example/actuatordemo/ActuatorDemoApplication.java

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+package com.example.actuatordemo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ActuatorDemoApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(ActuatorDemoApplication.class, args);
+	}
+}

jdk_8_maven/cs/rest/original/spring-actuator-demo/src/main/java/com/example/actuatordemo/config/ActuatorSecurityConfig.java

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+package com.example.actuatordemo.config;
+
+import org.springframework.boot.actuate.autoconfigure.security.servlet.EndpointRequest;
+import org.springframework.boot.actuate.context.ShutdownEndpoint;
+import org.springframework.boot.autoconfigure.security.servlet.PathRequest;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+
+@Configuration
+public class ActuatorSecurityConfig extends WebSecurityConfigurerAdapter {
+
+    /*
+        This spring security configuration does the following
+
+        1. Restrict access to the Shutdown endpoint to the ACTUATOR_ADMIN role.
+        2. Allow access to all other actuator endpoints.
+        3. Allow access to static resources.
+        4. Allow access to the home page (/).
+        5. All other requests need to be authenticated.
+        5. Enable http basic authentication to make the configuration complete.
+           You are free to use any other form of authentication.
+     */
+
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        http
+                .authorizeRequests()
+                    .requestMatchers(EndpointRequest.to(ShutdownEndpoint.class))
+                        .hasRole("ACTUATOR_ADMIN")
+                    .requestMatchers(EndpointRequest.toAnyEndpoint())
+                        .permitAll()
+                    .requestMatchers(PathRequest.toStaticResources().atCommonLocations())
+                        .permitAll()
+                    .antMatchers("/", "/slowApi")
+                        .permitAll()
+                    .antMatchers("/**")
+                        .authenticated()
+                .and()
+                .httpBasic();
+    }
+}

jdk_8_maven/cs/rest/original/spring-actuator-demo/src/main/java/com/example/actuatordemo/controller/SampleController.java

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+package com.example.actuatordemo.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+@RestController
+public class SampleController {
+
+    @GetMapping("/")
+    public String sayHello(@RequestParam(value = "name", defaultValue = "Guest") String name) {
+        return "Hello " + name + "!!";
+    }
+
+    @GetMapping("/slowApi")
+    public String timeConsumingAPI(@RequestParam(value = "delay", defaultValue = "0") Integer delay) throws InterruptedException {
+        if(delay == 0) {
+            Random random = new Random();
+            delay = random.nextInt(10);
+        }
+
+        TimeUnit.SECONDS.sleep(delay);
+        return "Result";
+    }
+
+}

jdk_8_maven/cs/rest/original/spring-actuator-demo/src/main/java/com/example/actuatordemo/health/CustomHealthIndicator.java

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+package com.example.actuatordemo.health;
+
+import org.springframework.boot.actuate.health.AbstractHealthIndicator;
+import org.springframework.boot.actuate.health.Health;
+import org.springframework.stereotype.Component;
+
+@Component
+public class CustomHealthIndicator extends AbstractHealthIndicator {
+
+    @Override
+    protected void doHealthCheck(Health.Builder builder) throws Exception {
+        // Use the builder to build the health status details that should be reported.
+        // If you throw an exception, the status will be DOWN with the exception message.
+
+        builder.up()
+                .withDetail("app", "Alive and Kicking")
+                .withDetail("error", "Nothing! I'm good.");
+    }
+}

jdk_8_maven/cs/rest/original/spring-actuator-demo/src/main/resources/application.properties

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+# Logging
+logging.file=app.log
+
+# Spring Security default user name and password
+spring.security.user.name=actuator
+spring.security.user.password=actuator
+spring.security.user.roles=ACTUATOR_ADMIN
+
+# INFO ENDPOINT CONFIGURATION
+info.app.name=@project.name@
+info.app.description=@project.description@
+info.app.version=@project.version@
+info.app.encoding=@project.build.sourceEncoding@
+info.app.java.version=@java.version@
+
+# SHUTDOWN ENDPOINT (ShutdownEndpoint)
+management.endpoint.shutdown.enabled=true
+
+# HEALTH ENDPOINT
+management.endpoint.health.show-details=always
+
+# ENDPOINTS WEB CONFIGURATION
+management.endpoints.web.exposure.include=*

jdk_8_maven/cs/rest/original/spring-actuator-demo/src/main/resources/prometheus.yml

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+# my global config
+global:
+  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
+  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
+  # scrape_timeout is set to the global default (10s).
+
+# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
+rule_files:
+  # - "first_rules.yml"
+  # - "second_rules.yml"
+
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs:
+  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
+  - job_name: 'prometheus'
+
+    # metrics_path defaults to '/metrics'
+    # scheme defaults to 'http'.
+
+    static_configs:
+    - targets: ['127.0.0.1:9090']
+
+  - job_name: 'spring-actuator'
+    metrics_path: '/actuator/prometheus'
+    scrape_interval: 5s
+    static_configs:
+    - targets: ['HOST_IP:8080']

jdk_8_maven/cs/rest/original/spring-actuator-demo/src/test/java/com/example/actuatordemo/ActuatorDemoApplicationTests.java

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+package com.example.actuatordemo;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class ActuatorDemoApplicationTests {
+
+	@Test
+	public void contextLoads() {
+	}
+
+}