new in v2

livelessons-edge/README.adoc

@@ -0,0 +1,9 @@
+:compat-mode:
+= Lesson 9: Developing Web Applications
+
+_Basics of developing web applications to consume your Microservices._
+
+- link:livelessons-web-resources[Resources]
+- link:livelessons-web-resources-angular[Resources (Angular)]
+- link:livelessons-web-templates[Templating]
+- link:livelessons-web-transforms[Transforms]

livelessons-edge/livelessons-edge-eureka-service/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>
+	<parent>
+		<groupId>livelessons</groupId>
+		<artifactId>livelessons-edge</artifactId>
+		<version>1.0.0-SNAPSHOT</version>
+	</parent>
+	<artifactId>livelessons-edge-eureka-service</artifactId>
+	<properties>
+		<main.basedir>../..</main.basedir>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-eureka-server</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+	</dependencies>
+</project>

livelessons-edge/livelessons-edge-eureka-service/src/main/java/demo/EurekaServiceApplication.java

@@ -0,0 +1,14 @@
+package demo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
+
+@EnableEurekaServer
+@SpringBootApplication
+public class EurekaServiceApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(EurekaServiceApplication.class, args);
+    }
+}

livelessons-edge/livelessons-edge-greetings-client/pom.xml

@@ -0,0 +1,48 @@
+<?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>livelessons</groupId>
+		<artifactId>livelessons-edge</artifactId>
+		<version>1.0.0-SNAPSHOT</version>
+	</parent>
+	<artifactId>livelessons-edge-eureka-client</artifactId>
+	<properties>
+		<main.basedir>../..</main.basedir>
+	</properties>
+	<dependencies>
+
+		<dependency>
+			<groupId>com.google.guava</groupId>
+			<artifactId>guava</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-zuul</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-eureka</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-feign</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-hystrix</artifactId>
+		</dependency>
+		<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>
+</project>

livelessons-edge/livelessons-edge-greetings-client/src/main/java/demo/GreetingsClientApplication.java

@@ -0,0 +1,119 @@
+package demo ;
+
+import com.google.common.util.concurrent.RateLimiter;
+import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
+import com.netflix.zuul.ZuulFilter;
+import com.netflix.zuul.context.RequestContext;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+import org.springframework.cloud.client.loadbalancer.LoadBalanced;
+import org.springframework.cloud.netflix.feign.EnableFeignClients;
+import org.springframework.cloud.netflix.feign.FeignClient;
+import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
+import org.springframework.context.annotation.Bean;
+import org.springframework.core.Ordered;
+import org.springframework.http.HttpStatus;
+import org.springframework.util.ReflectionUtils;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.client.RestTemplate;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@EnableCircuitBreaker
+@EnableFeignClients
+@EnableZuulProxy
+@EnableDiscoveryClient
+@SpringBootApplication
+public class GreetingsClientApplication {
+
+    @Bean
+    @LoadBalanced
+    RestTemplate restTemplate() {
+        return new RestTemplate();
+    }
+
+    public static void main(String[] args) {
+        SpringApplication.run(GreetingsClientApplication.class, args);
+    }
+}
+
+@FeignClient("greetings-service")
+interface GreetingsClient {
+
+    @RequestMapping(method = RequestMethod.GET, value = "/greetings/{name}")
+    Greeting greet(@PathVariable("name") String name);
+}
+
+@RestController
+class GreetingsApiGatewayRestController {
+
+    private final GreetingsClient greetingsClient;
+
+    @Autowired
+    public GreetingsApiGatewayRestController(GreetingsClient client) {
+        this.greetingsClient = client;
+    }
+
+    public String fallback(String name) {
+        return "ohai!";
+    }
+
+    @HystrixCommand(fallbackMethod = "fallback")
+    @RequestMapping(method = RequestMethod.GET, value = "/hi/{name}")
+    String greet(@PathVariable String name) {
+        return this.greetingsClient.greet(name).getGreeting();
+    }
+}
+
+class Greeting {
+    private String greeting;
+
+    public String getGreeting() {
+        return greeting;
+    }
+}
+
+//@Component
+class RateLimitingZuulFilter extends ZuulFilter {
+
+    private final RateLimiter rateLimiter = RateLimiter.create(1.0 / 30.0);
+
+    @Override
+    public String filterType() {
+        return "pre";
+    }
+
+    @Override
+    public int filterOrder() {
+        return Ordered.HIGHEST_PRECEDENCE + 100;
+    }
+
+    @Override
+    public boolean shouldFilter() {
+        return true;
+    }
+
+    @Override
+    public Object run() {
+        try {
+            RequestContext currentContext = RequestContext.getCurrentContext();
+            HttpServletResponse response = currentContext.getResponse();
+
+            if (!this.rateLimiter.tryAcquire()) {
+                response.setStatus(HttpStatus.TOO_MANY_REQUESTS.value());
+                response.getWriter().append(HttpStatus.TOO_MANY_REQUESTS.getReasonPhrase());
+                currentContext.setSendZuulResponse(false);
+            }
+        } catch (IOException e) {
+            ReflectionUtils.rethrowRuntimeException(e);
+        }
+        return null;
+    }
+}

livelessons-edge/livelessons-edge-greetings-client/src/main/resources/application.properties

@@ -0,0 +1,2 @@
+spring.application.name = greetings-client
+server.port=9999

livelessons-edge/livelessons-edge-greetings-service/pom.xml

@@ -0,0 +1,41 @@
+<?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>livelessons</groupId>
+		<artifactId>livelessons-edge</artifactId>
+		<version>1.0.0-SNAPSHOT</version>
+	</parent>
+	<artifactId>livelessons-edge-greetings-service</artifactId>
+	<properties>
+		<main.basedir>../..</main.basedir>
+	</properties>
+	<dependencies>
+
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-eureka</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</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>
+</project>

livelessons-edge/livelessons-edge-greetings-service/src/main/java/demo/GreetingsServiceApplication.java

@@ -0,0 +1,32 @@
+package demo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.Optional;
+
+@EnableDiscoveryClient
+@SpringBootApplication
+public class GreetingsServiceApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(GreetingsServiceApplication.class, args);
+    }
+}
+
+@RestController
+class GreetingsRestController {
+
+    @RequestMapping(method = RequestMethod.GET, value = "/greetings/{name}")
+    Map<String, String> greeting(@PathVariable String name,
+                                 @RequestHeader("x-forwarded-host") Optional<String> host,
+                                 @RequestHeader("x-forwarded-port") Optional<Integer> port) {
+        host.ifPresent(h -> System.out.println("host = " + h));
+        port.ifPresent(p -> System.out.println("port = " + p));
+        return Collections.singletonMap("greeting", "Hello, " + name + "!");
+    }
+}

livelessons-edge/livelessons-edge-greetings-service/src/main/resources/application.properties

@@ -0,0 +1 @@
+spring.application.name = greetings-service

livelessons-edge/pom.xml

@@ -0,0 +1,35 @@
+<?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>livelessons</groupId>
+		<artifactId>livelessons-parent</artifactId>
+		<version>1.0.0-SNAPSHOT</version>
+		<relativePath>../livelessons-parent</relativePath>
+	</parent>
+	<artifactId>livelessons-edge</artifactId>
+	<packaging>pom</packaging>
+	<properties>
+		<main.basedir>..</main.basedir>
+	</properties>
+	<modules>
+		<module>livelessons-edge-eureka-service</module>
+		<module>livelessons-edge-greetings-client</module>
+		<module>livelessons-edge-greetings-service</module>
+
+	</modules>
+
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.springframework.cloud</groupId>
+				<artifactId>spring-cloud-dependencies</artifactId>
+				<version>Camden.RELEASE</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+
+</project>