BAEL-798 - Apache Camel with Spring Boot (#1761)
* initial import * simplified to rest only * simplifications * update * Create ExampleServices.java * Update Application.java * simple readme * strip of dependency management * setting Camel versions apart where affected * Update README.md * update comments * Update pom.xml * delete of fabri8 deployment.yml
This commit is contained in:
Daniel Cassiani
Zeger Hendrikse
parent
1a73061761
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70ae331cd7
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Example for the Article on Camel API with SpringBoot
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to start up, run:
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mvn spring-boot:run
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them, do a POST http request to:
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http://localhost:8080/camel/api/bean
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with the HEADER: Content-Type: application/json,
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and a BODY Payload like {"id": 1,"name": "World"}
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and we will get a return code of 201 and the response: Hello, World - if the transform() method from Application class is uncommented and the process() method is commented
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or return code of 201 and the response: {"id": 10,"name": "Hello, World"} - if the transform() method from Application class is commented and the process() method is uncommented
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.example</groupId>
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<artifactId>spring-boot-camel</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>Spring-Boot - Camel API</name>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
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<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
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<camel.version>2.19.1</camel.version>
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<spring-boot-starter.version>1.5.4.RELEASE</spring-boot-starter.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.apache.camel</groupId>
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<artifactId>camel-servlet-starter</artifactId>
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<version>${camel.version}</version>
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</dependency>
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<dependency>
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<groupId>org.apache.camel</groupId>
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<artifactId>camel-jackson-starter</artifactId>
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<version>${camel.version}</version>
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</dependency>
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<dependency>
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<groupId>org.apache.camel</groupId>
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<artifactId>camel-swagger-java-starter</artifactId>
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<version>${camel.version}</version>
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</dependency>
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<dependency>
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<groupId>org.apache.camel</groupId>
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<artifactId>camel-spring-boot-starter</artifactId>
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<version>${camel.version}</version>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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<version>${spring-boot-starter.version}</version>
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</dependency>
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</dependencies>
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<build>
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<defaultGoal>spring-boot:run</defaultGoal>
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<plugins>
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<plugin>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>${maven-compiler-plugin.version}</version>
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<configuration>
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<source>1.8</source>
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<target>1.8</target>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>${maven-surefire-plugin.version}</version>
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</plugin>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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<version>${spring-boot-starter.version}</version>
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<executions>
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<execution>
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<goals>
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<goal>repackage</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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</project>
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package com.baeldung.camel;
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import javax.ws.rs.core.MediaType;
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import org.apache.camel.CamelContext;
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import org.apache.camel.Exchange;
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import org.apache.camel.Processor;
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import org.apache.camel.builder.RouteBuilder;
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import org.apache.camel.component.servlet.CamelHttpTransportServlet;
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import org.apache.camel.impl.DefaultCamelContext;
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import org.apache.camel.model.rest.RestBindingMode;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.boot.web.servlet.ServletRegistrationBean;
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import org.springframework.boot.web.support.SpringBootServletInitializer;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.ComponentScan;
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import org.springframework.stereotype.Component;
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@SpringBootApplication
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@ComponentScan(basePackages="com.baeldung.camel")
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public class Application extends SpringBootServletInitializer {
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@Value("${server.port}")
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String serverPort;
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@Value("${baeldung.api.path}")
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String contextPath;
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public static void main(String[] args) {
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SpringApplication.run(Application.class, args);
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}
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@Bean
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ServletRegistrationBean servletRegistrationBean() {
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ServletRegistrationBean servlet = new ServletRegistrationBean(new CamelHttpTransportServlet(), contextPath+"/*");
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servlet.setName("CamelServlet");
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return servlet;
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}
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@Component
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class RestApi extends RouteBuilder {
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@Override
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public void configure() {
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CamelContext context = new DefaultCamelContext();
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// http://localhost:8080/camel/api-doc
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restConfiguration().contextPath(contextPath) //
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.port(serverPort)
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.enableCORS(true)
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.apiContextPath("/api-doc")
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.apiProperty("api.title", "Test REST API")
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.apiProperty("api.version", "v1")
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.apiProperty("cors", "true") // cross-site
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.apiContextRouteId("doc-api")
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.component("servlet")
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.bindingMode(RestBindingMode.json)
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.dataFormatProperty("prettyPrint", "true");
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/**
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The Rest DSL supports automatic binding json/xml contents to/from POJOs using Camels Data Format.
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By default the binding mode is off, meaning there is no automatic binding happening for incoming and outgoing messages.
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You may want to use binding if you develop POJOs that maps to your REST services request and response types.
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This allows you, as a developer, to work with the POJOs in Java code.
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*/
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rest("/api/").description("Teste REST Service")
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.id("api-route")
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.post("/bean")
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.produces(MediaType.APPLICATION_JSON)
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.consumes(MediaType.APPLICATION_JSON)
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// .get("/hello/{place}")
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.bindingMode(RestBindingMode.auto)
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.type(MyBean.class)
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.enableCORS(true)
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// .outType(OutBean.class)
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.to("direct:remoteService");
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from("direct:remoteService")
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.routeId("direct-route")
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.tracing()
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.log(">>> ${body.id}")
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.log(">>> ${body.name}")
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// .transform().simple("blue ${in.body.name}")
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.process(new Processor() {
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@Override
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public void process(Exchange exchange) throws Exception {
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MyBean bodyIn = (MyBean) exchange.getIn().getBody();
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ExampleServices.example(bodyIn);
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exchange.getIn().setBody(bodyIn);
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}
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})
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.setHeader(Exchange.HTTP_RESPONSE_CODE, constant(201));
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}
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}
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}
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package com.baeldung.camel;
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/**
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* a Mock class to show how some other layer
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* (a persistence layer, for instance)
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* could be used insida a Camel
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*
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*/
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public class ExampleServices {
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public static void example(MyBean bodyIn) {
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bodyIn.setName( "Hello, " + bodyIn.getName() );
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bodyIn.setId(bodyIn.getId()*10);
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}
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}
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package com.baeldung.camel;
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public class MyBean {
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private Integer id;
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private String name;
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public Integer getId() {
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return id;
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}
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public void setId(Integer id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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}
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logging.config=classpath:logback.xml
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# the options from org.apache.camel.spring.boot.CamelConfigurationProperties can be configured here
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camel.springboot.name=MyCamel
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# lets listen on all ports to ensure we can be invoked from the pod IP
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server.address=0.0.0.0
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management.address=0.0.0.0
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# lets use a different management port in case you need to listen to HTTP requests on 8080
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management.port=8081
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# disable all management enpoints except health
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endpoints.enabled = true
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endpoints.health.enabled = true
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server:
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port: 8080
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# for example purposes of Camel version 2.18 and below
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baeldung:
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api:
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path: '/camel'
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camel:
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springboot:
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# The Camel context name
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name: ServicesRest
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# Binding health checks to a different port
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management:
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port: 8081
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# disable all management enpoints except health
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endpoints:
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enabled: false
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health:
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enabled: true
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# The application configuration properties
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quickstart:
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generateOrderPeriod: 10s
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processOrderPeriod: 30s
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE xml>
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<configuration>
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<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
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<!-- encoders are assigned the type
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ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
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<encoder>
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<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
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</encoder>
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</appender>
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<root level="info">
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<appender-ref ref="STDOUT" />
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</root>
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</configuration>
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