├── .gitignore ├── Dockerfile ├── LICENSE ├── README.md ├── pom.xml └── src └── main ├── fabric8 ├── deployment.yml └── service.yml ├── java ├── META-INF │ └── MANIFEST.MF └── com │ └── redhat │ └── developers │ └── msa │ └── ola │ ├── HolaService.java │ ├── HystrixServletConfiguration.java │ ├── KeycloakCORSConfiguration.java │ ├── OlaApplication.java │ ├── OlaController.java │ ├── SwaggerConfiguration.java │ └── TracingConfiguration.java └── resources ├── application.properties ├── config.properties ├── static └── index.html └── swagger.properties /.gitignore: -------------------------------------------------------------------------------- 1 | .* 2 | .idea 3 | target 4 | *.iml 5 | -------------------------------------------------------------------------------- /Dockerfile: -------------------------------------------------------------------------------- 1 | FROM fabric8/java-jboss-openjdk8-jdk:1.5.1 2 | 3 | ENV JAVA_APP_JAR ola.jar 4 | ENV JAVA_OPTIONS -Xmx256m -Djava.security.egd=file:///dev/./urandom 5 | 6 | EXPOSE 8080 7 | 8 | ADD target/ola.jar /deployments/ -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright 2013 Red Hat, Inc. and/or its affiliates 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # ola 2 | 3 | ola microservice using Spring Boot 4 | 5 | The detailed instructions to run _Red Hat Helloworld MSA_ demo, can be found at the following repository: 6 | 7 | ## Build and Deploy ola locally 8 | 9 | 1. Open a command prompt and navigate to the root directory of this microservice. 10 | 2. Type this command to build and execute the microservice: 11 | 12 | mvn clean compile spring-boot:run 13 | 14 | 3. The application will be running at the following URL: 15 | -------------------------------------------------------------------------------- /pom.xml: -------------------------------------------------------------------------------- 1 | 17 | 20 | 4.0.0 21 | 22 | com.redhat.developers.msa.ola 23 | ola 24 | 0.0.1-SNAPSHOT 25 | jar 26 | 27 | ola 28 | Demo project for Spring Boot 29 | 30 | 31 | org.springframework.boot 32 | spring-boot-starter-parent 33 | 1.4.4.RELEASE 34 | 35 | 36 | 37 | 38 | 40 | 42 | UTF-8 43 | 44 | 45 | 1.8 46 | 1.8 47 | 48 | 49 | 2.4.0.Final 50 | 9.4.0 51 | 0.0.3 52 | 1.5.1 53 | 0.22.0 54 | 0.0.4 55 | 1.5.8 56 | 2.4.0 57 | 0.19.0 58 | 59 | 60 | fabric8/s2i-java 61 | 62 | 63 | 64 | 65 | org.springframework.boot 66 | spring-boot-starter-web 67 | 68 | 69 | org.springframework.boot 70 | spring-boot-starter-actuator 71 | 72 | 73 | org.keycloak 74 | keycloak-spring-boot-adapter 75 | ${keycloak.version} 76 | 77 | 78 | org.keycloak 79 | keycloak-tomcat8-adapter 80 | ${keycloak.version} 81 | 82 | 83 | 84 | 85 | io.github.openfeign.opentracing 86 | feign-hystrix-opentracing 87 | ${openfeign.opentracing.version} 88 | 89 | 90 | io.github.openfeign 91 | feign-jackson 92 | ${openfeign.version} 93 | 94 | 95 | io.github.openfeign 96 | feign-httpclient 97 | ${openfeign.version} 98 | 99 | 100 | 101 | 102 | com.netflix.hystrix 103 | hystrix-core 104 | ${hystrix.version} 105 | 106 | 107 | com.netflix.hystrix 108 | hystrix-metrics-event-stream 109 | ${hystrix.version} 110 | 111 | 112 | 113 | 114 | io.opentracing 115 | opentracing-noop 116 | ${io.opentracing.version} 117 | 118 | 119 | io.opentracing.contrib 120 | opentracing-spring-web-autoconfigure 121 | ${io.opentracing.contrib.spring.autoconfigure.version} 122 | 123 | 124 | 125 | 126 | io.opentracing 127 | opentracing-api 128 | 0.33.0 129 | 130 | 131 | io.opentracing 132 | opentracing-util 133 | 0.33.0 134 | 135 | 136 | io.jaegertracing 137 | jaeger-client 138 | 1.8.1 139 | 140 | 141 | 142 | 143 | io.swagger 144 | swagger-jaxrs 145 | ${swagger.version} 146 | 147 | 148 | 149 | io.springfox 150 | springfox-swagger2 151 | ${springfox.version} 152 | 153 | 154 | 155 | io.springfox 156 | springfox-swagger-ui 157 | ${springfox.version} 158 | 159 | 160 | 161 | 162 | ola 163 | 164 | 165 | org.springframework.boot 166 | spring-boot-maven-plugin 167 | 168 | 169 | 170 | 171 | -------------------------------------------------------------------------------- /src/main/fabric8/deployment.yml: -------------------------------------------------------------------------------- 1 | --- 2 | apiVersion: "extensions/v1beta1" 3 | kind: "Deployment" 4 | spec: 5 | replicas: 1 6 | template: 7 | spec: 8 | containers: 9 | - env: 10 | - name: JAVA_OPTIONS 11 | value: "-Xmx256m" -------------------------------------------------------------------------------- /src/main/fabric8/service.yml: -------------------------------------------------------------------------------- 1 | --- 2 | apiVersion: "v1" 3 | kind: "Service" 4 | spec: 5 | ports: 6 | - name: 8080-tcp 7 | protocol: TCP 8 | port: 8080 9 | targetPort: 8080 10 | - name: 8778-tcp 11 | protocol: TCP 12 | port: 8778 13 | targetPort: 8778 14 | - name: 9779-tcp 15 | protocol: TCP 16 | port: 9779 17 | targetPort: 9779 -------------------------------------------------------------------------------- /src/main/java/META-INF/MANIFEST.MF: -------------------------------------------------------------------------------- 1 | Manifest-Version: 1.0 2 | Class-Path: 3 | 4 | -------------------------------------------------------------------------------- /src/main/java/com/redhat/developers/msa/ola/HolaService.java: -------------------------------------------------------------------------------- 1 | /** 2 | * JBoss, Home of Professional Open Source 3 | * Copyright 2016, Red Hat, Inc. and/or its affiliates, and individual 4 | * contributors by the @authors tag. See the copyright.txt in the 5 | * distribution for a full listing of individual contributors. 6 | * 7 | * Licensed under the Apache License, Version 2.0 (the "License"); 8 | * you may not use this file except in compliance with the License. 9 | * You may obtain a copy of the License at 10 | * http://www.apache.org/licenses/LICENSE-2.0 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the License for the specific language governing permissions and 15 | * limitations under the License. 16 | */ 17 | package com.redhat.developers.msa.ola; 18 | 19 | import feign.RequestLine; 20 | 21 | import java.util.List; 22 | 23 | public interface HolaService { 24 | 25 | @RequestLine("GET /api/hola-chaining") 26 | public List hola(); 27 | 28 | } 29 | -------------------------------------------------------------------------------- /src/main/java/com/redhat/developers/msa/ola/HystrixServletConfiguration.java: -------------------------------------------------------------------------------- 1 | package com.redhat.developers.msa.ola; 2 | 3 | import org.springframework.boot.context.embedded.ServletRegistrationBean; 4 | import org.springframework.context.annotation.Bean; 5 | import org.springframework.context.annotation.Configuration; 6 | 7 | import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet; 8 | 9 | @Configuration 10 | public class HystrixServletConfiguration { 11 | 12 | @Bean 13 | public ServletRegistrationBean jerseyServlet() { 14 | ServletRegistrationBean registration = new ServletRegistrationBean(new HystrixMetricsStreamServlet(), "/hystrix.stream"); 15 | return registration; 16 | } 17 | 18 | } 19 | -------------------------------------------------------------------------------- /src/main/java/com/redhat/developers/msa/ola/KeycloakCORSConfiguration.java: -------------------------------------------------------------------------------- 1 | package com.redhat.developers.msa.ola; 2 | 3 | import org.springframework.context.annotation.Bean; 4 | import org.springframework.context.annotation.Configuration; 5 | import org.springframework.http.HttpMethod; 6 | import org.springframework.web.servlet.config.annotation.CorsRegistry; 7 | import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; 8 | import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; 9 | 10 | @Configuration 11 | public class KeycloakCORSConfiguration { 12 | 13 | @Bean 14 | public WebMvcConfigurer corsConfiguration() { 15 | return new WebMvcConfigurerAdapter() { 16 | @Override 17 | public void addCorsMappings(CorsRegistry registry) { 18 | registry.addMapping("/api/**") 19 | .allowedMethods(HttpMethod.GET.toString(), HttpMethod.POST.toString(), 20 | HttpMethod.PUT.toString(), HttpMethod.DELETE.toString(), HttpMethod.OPTIONS.toString()) 21 | .allowedOrigins("*"); 22 | } 23 | }; 24 | } 25 | } -------------------------------------------------------------------------------- /src/main/java/com/redhat/developers/msa/ola/OlaApplication.java: -------------------------------------------------------------------------------- 1 | /** 2 | * JBoss, Home of Professional Open Source 3 | * Copyright 2016, Red Hat, Inc. and/or its affiliates, and individual 4 | * contributors by the @authors tag. See the copyright.txt in the 5 | * distribution for a full listing of individual contributors. 6 | *

7 | * Licensed under the Apache License, Version 2.0 (the "License"); 8 | * you may not use this file except in compliance with the License. 9 | * You may obtain a copy of the License at 10 | * http://www.apache.org/licenses/LICENSE-2.0 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the License for the specific language governing permissions and 15 | * limitations under the License. 16 | */ 17 | package com.redhat.developers.msa.ola; 18 | 19 | import org.springframework.boot.SpringApplication; 20 | import org.springframework.boot.autoconfigure.SpringBootApplication; 21 | 22 | import springfox.documentation.swagger2.annotations.EnableSwagger2; 23 | 24 | @SpringBootApplication 25 | @EnableSwagger2 26 | public class OlaApplication { 27 | 28 | public static void main(String[] args) { 29 | SpringApplication.run(OlaApplication.class, args); 30 | } 31 | 32 | } 33 | -------------------------------------------------------------------------------- /src/main/java/com/redhat/developers/msa/ola/OlaController.java: -------------------------------------------------------------------------------- 1 | /** 2 | * JBoss, Home of Professional Open Source 3 | * Copyright 2016, Red Hat, Inc. and/or its affiliates, and individual 4 | * contributors by the @authors tag. See the copyright.txt in the 5 | * distribution for a full listing of individual contributors. 6 | *

7 | * Licensed under the Apache License, Version 2.0 (the "License"); 8 | * you may not use this file except in compliance with the License. 9 | * You may obtain a copy of the License at 10 | * http://www.apache.org/licenses/LICENSE-2.0 11 | * Unless required by applicable law or agreed to in writing, software 12 | * distributed under the License is distributed on an "AS IS" BASIS, 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 | * See the License for the specific language governing permissions and 15 | * limitations under the License. 16 | */ 17 | package com.redhat.developers.msa.ola; 18 | 19 | import java.util.ArrayList; 20 | import java.util.List; 21 | 22 | import javax.servlet.ServletException; 23 | import javax.servlet.http.HttpServletRequest; 24 | 25 | import org.keycloak.KeycloakPrincipal; 26 | import org.keycloak.adapters.RefreshableKeycloakSecurityContext; 27 | import org.keycloak.representations.AccessToken; 28 | import org.springframework.beans.factory.annotation.Autowired; 29 | import org.springframework.web.bind.annotation.CrossOrigin; 30 | import org.springframework.web.bind.annotation.RequestMapping; 31 | import org.springframework.web.bind.annotation.RequestMethod; 32 | import org.springframework.web.bind.annotation.RestController; 33 | import org.springframework.web.context.request.RequestContextHolder; 34 | import org.springframework.web.context.request.ServletRequestAttributes; 35 | 36 | import io.swagger.annotations.ApiOperation; 37 | 38 | @RestController 39 | @RequestMapping("/api") 40 | public class OlaController { 41 | 42 | @Autowired 43 | private HolaService holaService; 44 | 45 | @CrossOrigin 46 | @RequestMapping(method = RequestMethod.GET, value = "/ola", produces = "text/plain") 47 | @ApiOperation("Returns the greeting in Portuguese") 48 | public String ola() { 49 | String hostname = System.getenv().getOrDefault("HOSTNAME", "Unknown"); 50 | return String.format("Olá de %s", hostname); 51 | } 52 | 53 | @CrossOrigin 54 | @RequestMapping(method = RequestMethod.GET, value = "/ola-chaining", produces = "application/json") 55 | @ApiOperation("Returns the greeting plus the next service in the chain") 56 | public List sayHelloChaining() { 57 | List greetings = new ArrayList<>(); 58 | greetings.add(ola()); 59 | greetings.addAll(holaService.hola()); 60 | return greetings; 61 | } 62 | 63 | @CrossOrigin 64 | @RequestMapping(method = RequestMethod.GET, value = "/ola-secured", produces = "text/plain") 65 | @ApiOperation("Returns a message that is only available for authenticated users") 66 | public String olaSecured(KeycloakPrincipal principal) { 67 | AccessToken token = principal.getKeycloakSecurityContext().getToken(); 68 | return "This is a Secured resource. You are logged as " + token.getName(); 69 | } 70 | 71 | @CrossOrigin 72 | @RequestMapping(method = RequestMethod.GET, value = "/logout", produces = "text/plain") 73 | @ApiOperation("Logout") 74 | public String logout() throws ServletException { 75 | HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest(); 76 | request.logout(); 77 | return "Logged out"; 78 | } 79 | 80 | @RequestMapping(method = RequestMethod.GET, value = "/health") 81 | @ApiOperation("Used to verify the health of the service") 82 | public String health() { 83 | return "I'm ok"; 84 | } 85 | } 86 | -------------------------------------------------------------------------------- /src/main/java/com/redhat/developers/msa/ola/SwaggerConfiguration.java: -------------------------------------------------------------------------------- 1 | package com.redhat.developers.msa.ola; 2 | 3 | import org.springframework.context.annotation.Bean; 4 | import org.springframework.context.annotation.Configuration; 5 | import org.springframework.context.annotation.PropertySource; 6 | 7 | import springfox.documentation.builders.ApiInfoBuilder; 8 | import springfox.documentation.builders.PathSelectors; 9 | import springfox.documentation.service.ApiInfo; 10 | import springfox.documentation.service.Contact; 11 | import springfox.documentation.spi.DocumentationType; 12 | import springfox.documentation.spring.web.plugins.Docket; 13 | 14 | @Configuration 15 | @PropertySource("classpath:swagger.properties") 16 | public class SwaggerConfiguration { 17 | 18 | @Bean 19 | public Docket newsApi() { 20 | return new Docket(DocumentationType.SWAGGER_2) 21 | .apiInfo(apiInfo()) 22 | .select() 23 | .paths(PathSelectors.any()) 24 | .build() 25 | .pathMapping("/"); 26 | } 27 | 28 | private ApiInfo apiInfo() { 29 | return new ApiInfoBuilder() 30 | .title("Ola microservices REST API") 31 | .description("Operations that can be invoked in the ola microservices") 32 | .contact(new Contact("Red Hat Developers", "http://developers.redhat.com", "developer@redhat.com")) 33 | .license("Apache License Version 2.0") 34 | .licenseUrl("http://www.apache.org/licenses/LICENSE-2.0.html") 35 | .version("1.0.0") 36 | .build(); 37 | } 38 | 39 | } 40 | -------------------------------------------------------------------------------- /src/main/java/com/redhat/developers/msa/ola/TracingConfiguration.java: -------------------------------------------------------------------------------- 1 | package com.redhat.developers.msa.ola; 2 | 3 | import java.util.Collections; 4 | import java.util.regex.Pattern; 5 | 6 | import org.apache.http.impl.client.HttpClientBuilder; 7 | import org.springframework.context.annotation.Bean; 8 | import org.springframework.context.annotation.Configuration; 9 | 10 | import feign.Logger; 11 | import feign.httpclient.ApacheHttpClient; 12 | import feign.hystrix.HystrixFeign; 13 | import feign.jackson.JacksonDecoder; 14 | import feign.opentracing.TracingClient; 15 | import feign.opentracing.hystrix.TracingConcurrencyStrategy; 16 | import io.jaegertracing.tracerresolver.internal.JaegerTracerFactory; 17 | import io.opentracing.NoopTracerFactory; 18 | import io.opentracing.Tracer; 19 | import io.opentracing.contrib.spring.web.autoconfig.WebTracingConfiguration; 20 | 21 | /** 22 | * @author Pavol Loffay 23 | */ 24 | @Configuration 25 | public class TracingConfiguration { 26 | private static final org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(TracingConfiguration.class); 27 | 28 | @Bean 29 | public Tracer tracer() { 30 | String jaegerURL = System.getenv("JAEGER_SERVICE_NAME"); 31 | if (jaegerURL != null) { 32 | log.info("Using Jaeger tracer"); 33 | return jaegerTracer(jaegerURL); 34 | } 35 | 36 | log.info("Using Noop tracer"); 37 | return NoopTracerFactory.create(); 38 | } 39 | 40 | private Tracer jaegerTracer(String url) { 41 | return new JaegerTracerFactory().getTracer(); 42 | } 43 | 44 | @Bean 45 | public WebTracingConfiguration webTracingConfiguration() { 46 | return WebTracingConfiguration.builder() 47 | .withSkipPattern(Pattern.compile("/api/health")) 48 | .build(); 49 | } 50 | 51 | /** 52 | * 53 | * This is were the "magic" happens: it creates a Feign, which is a proxy 54 | * interface for remote calling a 55 | * REST endpoint with Hystrix fallback support. 56 | */ 57 | @Bean 58 | public HolaService holaService(Tracer tracer) { 59 | // bind current span to Hystrix thread 60 | TracingConcurrencyStrategy.register(); 61 | 62 | return HystrixFeign.builder() 63 | .client(new TracingClient(new ApacheHttpClient(HttpClientBuilder.create().build()), tracer)) 64 | .logger(new Logger.ErrorLogger()).logLevel(Logger.Level.BASIC) 65 | .decoder(new JacksonDecoder()) 66 | .target(HolaService.class, "http://hola:8080/", 67 | () -> Collections.singletonList("Hola response (fallback)")); 68 | } 69 | } 70 | -------------------------------------------------------------------------------- /src/main/resources/application.properties: -------------------------------------------------------------------------------- 1 | keycloak.realm = helloworld-msa 2 | keycloak.auth-server-url = 3 | keycloak.ssl-required = none 4 | keycloak.resource = ola 5 | keycloak.bearer-only = true 6 | keycloak.cors = true 7 | 8 | keycloak.credentials.secret = 11111111-1111-1111-1111-111111111111 9 | keycloak.securityConstraints[0].securityCollections[0].name = spring secured api 10 | keycloak.securityConstraints[0].securityCollections[0].authRoles[0] = USERS 11 | keycloak.securityConstraints[0].securityCollections[0].patterns[0] = /api/ola-secured -------------------------------------------------------------------------------- /src/main/resources/config.properties: -------------------------------------------------------------------------------- 1 | # JBoss, Home of Professional Open Source 2 | # Copyright 2016, Red Hat, Inc. and/or its affiliates, and individual 3 | # contributors by the @authors tag. See the copyright.txt in the 4 | # distribution for a full listing of individual contributors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # http://www.apache.org/licenses/LICENSE-2.0 10 | # Unless required by applicable law or agreed to in writing, software 11 | # distributed under the License is distributed on an "AS IS" BASIS, 12 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | # See the License for the specific language governing permissions and 14 | # limitations under the License. 15 | 16 | # Setting Hystrix timeout for the chain in 900ms (we have 3 more chained service calls). 17 | hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=900 18 | # This property sets the minimum number of requests in a rolling window that will trip the circuit. 19 | hystrix.command.default.circuitBreaker.requestVolumeThreshold=5 20 | -------------------------------------------------------------------------------- /src/main/resources/static/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Microservices endpoint 6 | 7 | 8 |

9 | 11 |
12 | 13 | -------------------------------------------------------------------------------- /src/main/resources/swagger.properties: -------------------------------------------------------------------------------- 1 | springfox.documentation.swagger.v2.path=/api/swagger.json 2 | 3 | --------------------------------------------------------------------------------