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Source code for Lightrun articles

This commit is contained in:
Graham Cox 2022-05-17 16:07:21 +01:00
parent c253eb6bd8
commit 177f912393
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# Lightrun Example Application - Tasks Management
This application exists as an example for the Lightrun series of articles.
## Building
This application requires [Apache Maven](https://maven.apache.org/) and [Java 17+](https://www.oracle.com/java/technologies/downloads/).
Building the code is done by executing:
```
$ mvn install
```
from the top level.
## Running
The application consists of three services:
* Tasks
* Users
* API
These are all Spring Boot applications.
The Tasks and Users services exist as microservices for managing one facet of data. Each uses a database, and utilise a JMS queue between them as well. For convenience this infrastructure is all embedded in the applications.
This does mean that the startup order is important. The JMS queue exists within the Tasks service and is connected to from the Users service. As such, the Tasks service must be started before the others.
Each service can be started either by executing `mvn spring-boot:run` from within the appropriate directory. Alternatively, as Spring Boot applications, the build will produce an executable JAR file within the `target` directory that can be executed as, for example:
```
$ java -jar ./target/tasks-service-0.0.1-SNAPSHOT.jar
```

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HELP.md
target/
!.mvn/wrapper/maven-wrapper.jar
!**/src/main/**/target/
!**/src/test/**/target/
### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr
### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
build/
!**/src/main/**/build/
!**/src/test/**/build/
### VS Code ###
.vscode/

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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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.6.7</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.baeldung</groupId>
<artifactId>api-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>api-service</name>
<description>Aggregator Service for LightRun Article</description>
<properties>
<java.version>17</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-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-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>

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lightrun/api-service/src/main/java/com/baeldung/apiservice/ApiServiceApplication.java Normal file
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package com.baeldung.apiservice;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class ApiServiceApplication {
public static void main(String[] args) {
SpringApplication.run(ApiServiceApplication.class, args);
}
}

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package com.baeldung.apiservice;
import org.slf4j.MDC;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.UUID;
@Component
public class RequestIdGenerator implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
String requestId = UUID.randomUUID().toString();
MDC.put(RequestIdGenerator.class.getCanonicalName(), requestId);
response.addHeader("X-Request-Id", requestId);
return true;
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
MDC.remove(RequestIdGenerator.class.getCanonicalName());
}
public static String getRequestId() {
return MDC.get(RequestIdGenerator.class.getCanonicalName());
}
}

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lightrun/api-service/src/main/java/com/baeldung/apiservice/RestTemplateConfig.java Normal file
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package com.baeldung.apiservice;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration
public class RestTemplateConfig {
@Bean
public RestTemplate restTemplate(RestTemplateBuilder builder) {
return builder
.additionalInterceptors((request, body, execution) -> {
request.getHeaders().add("X-Request-Id", RequestIdGenerator.getRequestId());
return execution.execute(request, body);
})
.build();
}
}

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package com.baeldung.apiservice;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class WebConfig implements WebMvcConfigurer {
@Autowired
private RequestIdGenerator requestIdGenerator;
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(requestIdGenerator);
}
}

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package com.baeldung.apiservice.adapters.http;
import java.time.Instant;
public record TaskResponse(String id,
String title,
Instant created,
UserResponse createdBy,
UserResponse assignedTo,
String status) {
}

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lightrun/api-service/src/main/java/com/baeldung/apiservice/adapters/http/TasksController.java Normal file
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package com.baeldung.apiservice.adapters.http;
import com.baeldung.apiservice.adapters.tasks.Task;
import com.baeldung.apiservice.adapters.tasks.TaskRepository;
import com.baeldung.apiservice.adapters.users.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.*;
@RequestMapping("/")
@RestController
public class TasksController {
@Autowired
private TaskRepository taskRepository;
@Autowired
private UserRepository userRepository;
@GetMapping("/{id}")
public TaskResponse getTaskById(@PathVariable("id") String id) {
Task task = taskRepository.getTaskById(id);
if (task == null) {
throw new UnknownTaskException();
}
return buildResponse(task);
}
private TaskResponse buildResponse(Task task) {
return new TaskResponse(task.id(),
task.title(),
task.created(),
getUser(task.createdBy()),
getUser(task.assignedTo()),
task.status());
}
private UserResponse getUser(String userId) {
if (userId == null) {
return null;
}
var user = userRepository.getUserById(userId);
if (user == null) {
return null;
}
return new UserResponse(user.id(), user.name());
}
@ExceptionHandler(UnknownTaskException.class)
@ResponseStatus(HttpStatus.NOT_FOUND)
public void handleUnknownTask() {
}
}

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lightrun/api-service/src/main/java/com/baeldung/apiservice/adapters/http/UnknownTaskException.java Normal file
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package com.baeldung.apiservice.adapters.http;
public class UnknownTaskException extends RuntimeException {
}

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lightrun/api-service/src/main/java/com/baeldung/apiservice/adapters/http/UserResponse.java Normal file
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package com.baeldung.apiservice.adapters.http;
public record UserResponse(String id, String name) {
}

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lightrun/api-service/src/main/java/com/baeldung/apiservice/adapters/tasks/Task.java Normal file
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package com.baeldung.apiservice.adapters.tasks;
import java.time.Instant;
public record Task(String id,
String title,
Instant created,
String createdBy,
String assignedTo,
String status) {
}

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lightrun/api-service/src/main/java/com/baeldung/apiservice/adapters/tasks/TaskRepository.java Normal file
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package com.baeldung.apiservice.adapters.tasks;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Repository;
import org.springframework.web.client.HttpClientErrorException;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.util.UriComponentsBuilder;
@Repository
public class TaskRepository {
@Autowired
private RestTemplate restTemplate;
@Value("${tasks-service.url}")
private String tasksService;
public Task getTaskById(String id) {
var uri = UriComponentsBuilder.fromUriString(tasksService)
.path(id)
.build()
.toUri();
try {
return restTemplate.getForObject(uri, Task.class);
} catch (HttpClientErrorException.NotFound e) {
return null;
}
}
}

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lightrun/api-service/src/main/java/com/baeldung/apiservice/adapters/users/User.java Normal file
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package com.baeldung.apiservice.adapters.users;
public record User(String id, String name) {
}

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lightrun/api-service/src/main/java/com/baeldung/apiservice/adapters/users/UserRepository.java Normal file
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package com.baeldung.apiservice.adapters.users;
import com.baeldung.apiservice.adapters.users.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Repository;
import org.springframework.web.client.HttpClientErrorException;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.util.UriComponentsBuilder;
@Repository
public class UserRepository {
@Autowired
private RestTemplate restTemplate;
@Value("${users-service.url}")
private String usersService;
public User getUserById(String id) {
var uri = UriComponentsBuilder.fromUriString(usersService)
.path(id)
.build()
.toUri();
try {
return restTemplate.getForObject(uri, User.class);
} catch (HttpClientErrorException.NotFound e) {
return null;
}
}
}

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users-service.url=http://localhost:8081
tasks-service.url=http://localhost:8082

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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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baelduung</groupId>
<artifactId>lightrun-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<name>lightrun</name>
<description>Services for LightRun Article</description>
<modules>
<module>tasks-service</module>
<module>users-service</module>
<module>api-service</module>
</modules>
</project>

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HELP.md
target/
!.mvn/wrapper/maven-wrapper.jar
!**/src/main/**/target/
!**/src/test/**/target/
### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr
### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
build/
!**/src/main/**/build/
!**/src/test/**/build/
### VS Code ###
.vscode/

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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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.6.7</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.baeldung</groupId>
<artifactId>tasks-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>tasks-service</name>
<description>Tasks Service for LightRun Article</description>
<properties>
<java.version>17</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-artemis</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>org.flywaydb</groupId>
<artifactId>flyway-core</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>artemis-jms-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-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>

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package com.baeldung.tasksservice;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.jms.artemis.ArtemisConfigurationCustomizer;
import org.springframework.context.annotation.Configuration;
@Configuration
public class ArtemisConfig implements ArtemisConfigurationCustomizer {
@Value("${spring.artemis.host}")
private String hostname;
@Value("${spring.artemis.port}")
private int port;
@Override
public void customize(org.apache.activemq.artemis.core.config.Configuration configuration) {
try {
configuration.addAcceptorConfiguration("remote", "tcp://" + hostname + ":" + port);
} catch (Exception e) {
throw new RuntimeException("Failed to configure Artemis listener", e);
}
}
}

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package com.baeldung.tasksservice;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class TasksServiceApplication {
public static void main(String[] args) {
SpringApplication.run(TasksServiceApplication.class, args);
}
}

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lightrun/tasks-service/src/main/java/com/baeldung/tasksservice/adapters/http/CreateTaskRequest.java Normal file
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/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.tasksservice.adapters.http;
public record CreateTaskRequest(String title, String createdBy) {
}

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/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.tasksservice.adapters.http;
import java.util.Optional;
public record PatchTaskRequest(Optional<String> status, Optional<String> assignedTo) {
}

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/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.tasksservice.adapters.http;
import java.time.Instant;
public record TaskResponse(String id,
String title,
Instant created,
String createdBy,
String assignedTo,
String status) {
}

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/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.tasksservice.adapters.http;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import com.baeldung.tasksservice.adapters.repository.TaskRecord;
import com.baeldung.tasksservice.service.TasksService;
import com.baeldung.tasksservice.service.UnknownTaskException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PatchMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/")
class TasksController {
@Autowired
private TasksService tasksService;
@PostMapping
@ResponseStatus(HttpStatus.CREATED)
public TaskResponse createTask(@RequestBody CreateTaskRequest body) {
var task = tasksService.createTask(body.title(), body.createdBy());
return buildResponse(task);
}
@GetMapping
public List<TaskResponse> searchTasks(@RequestParam("status") Optional<String> status,
@RequestParam("createdBy") Optional<String> createdBy) {
var tasks = tasksService.search(status, createdBy);
return tasks.stream()
.map(this::buildResponse)
.collect(Collectors.toList());
}
@GetMapping("/{id}")
public TaskResponse getTask(@PathVariable("id") String id) {
var task = tasksService.getTaskById(id);
return buildResponse(task);
}
@DeleteMapping("/{id}")
public void deleteTask(@PathVariable("id") String id) {
tasksService.deleteTaskById(id);
}
@PatchMapping("/{id}")
public TaskResponse patchTask(@PathVariable("id") String id,
@RequestBody PatchTaskRequest body) {
var task = tasksService.updateTask(id, body.status(), body.assignedTo());
return buildResponse(task);
}
private TaskResponse buildResponse(final TaskRecord task) {
return new TaskResponse(task.getId(), task.getTitle(), task.getCreated(), task.getCreatedBy(),
task.getAssignedTo(), task.getStatus());
}
@ExceptionHandler(UnknownTaskException.class)
@ResponseStatus(HttpStatus.NOT_FOUND)
public void handleUnknownTask() {
}
}

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{
"local-tasks": {
"host": "localhost:8082"
}
}

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GET http://{{host}}/createdemoapplication1 HTTP/1.1
###
GET http://{{host}}/unknown HTTP/1.1
###
GET http://{{host}}?status=PENDING
###
GET http://{{host}}?createdBy=baeldung
###
GET http://{{host}}?createdBy=baeldung&status=COMPLETE
###
DELETE http://{{host}}/createdemoapplication1 HTTP/1.1
###
DELETE http://{{host}}/unknown HTTP/1.1
###
POST http://{{host}} HTTP/1.1
Content-Type: application/json
{
"title": "My Task",
"createdBy": "graham"
}
###
PATCH http://{{host}}/createdemoapplication1 HTTP/1.1
Content-Type: application/json
{
"status": "COMPLETE"
}

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package com.baeldung.tasksservice.adapters.jms;
import org.springframework.stereotype.Service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.annotation.JmsListener;
import com.baeldung.tasksservice.service.DeletedUserService;
@Service
public class JmsConsumer {
@Autowired
private DeletedUserService deletedUserService;
@JmsListener(destination = "deleted_user")
public void receive(String user) {
deletedUserService.handleDeletedUser(user);
}
}

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/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.tasksservice.adapters.repository;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import java.time.Instant;
@Entity
@Table(name = "tasks")
public class TaskRecord {
@Id
@Column(name = "task_id")
private String id;
private String title;
@Column(name = "created_at")
private Instant created;
@Column(name = "created_by")
private String createdBy;
@Column(name = "assigned_to")
private String assignedTo;
private String status;
public TaskRecord(final String id, final String title, final Instant created, final String createdBy,
final String assignedTo, final String status) {
this.id = id;
this.title = title;
this.created = created;
this.createdBy = createdBy;
this.assignedTo = assignedTo;
this.status = status;
}
private TaskRecord() {
// Needed for JPA
}
public String getId() {
return id;
}
public String getTitle() {
return title;
}
public Instant getCreated() {
return created;
}
public String getCreatedBy() {
return createdBy;
}
public String getAssignedTo() {
return assignedTo;
}
public String getStatus() {
return status;
}
public void setAssignedTo(final String assignedTo) {
this.assignedTo = assignedTo;
}
public void setStatus(final String status) {
this.status = status;
}
}

28
lightrun/tasks-service/src/main/java/com/baeldung/tasksservice/adapters/repository/TasksRepository.java Normal file
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@ -0,0 +1,28 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.tasksservice.adapters.repository;
import java.util.List;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface TasksRepository extends JpaRepository<TaskRecord, String> {
List<TaskRecord> findByStatus(String status);
List<TaskRecord> findByCreatedBy(String createdBy);
List<TaskRecord> findByStatusAndCreatedBy(String status, String createdBy);
List<TaskRecord> findByAssignedTo(String assignedTo);
}

27
lightrun/tasks-service/src/main/java/com/baeldung/tasksservice/service/DeletedUserService.java Normal file
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@ -0,0 +1,27 @@
package com.baeldung.tasksservice.service;
import javax.transaction.Transactional;
import com.baeldung.tasksservice.adapters.repository.TaskRecord;
import com.baeldung.tasksservice.adapters.repository.TasksRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class DeletedUserService {
@Autowired
private TasksRepository tasksRepository;
@Transactional
public void handleDeletedUser(String user) {
var ownedByUser = tasksRepository.findByCreatedBy(user);
tasksRepository.deleteAll(ownedByUser);
var assignedToUser = tasksRepository.findByAssignedTo(user);
for (TaskRecord record : assignedToUser) {
record.setAssignedTo(null);
record.setStatus("PENDING");
}
}
}

72
lightrun/tasks-service/src/main/java/com/baeldung/tasksservice/service/TasksService.java Normal file
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@ -0,0 +1,72 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.tasksservice.service;
import javax.transaction.Transactional;
import java.time.Instant;
import java.util.List;
import java.util.Optional;
import java.util.UUID;
import com.baeldung.tasksservice.adapters.repository.TaskRecord;
import com.baeldung.tasksservice.adapters.repository.TasksRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class TasksService {
@Autowired
private TasksRepository tasksRepository;
public TaskRecord getTaskById(String id) {
return tasksRepository.findById(id).orElseThrow(() -> new UnknownTaskException(id));
}
@Transactional
public void deleteTaskById(String id) {
var task = tasksRepository.findById(id).orElseThrow(() -> new UnknownTaskException(id));
tasksRepository.delete(task);
}
public List<TaskRecord> search(Optional<String> createdBy, Optional<String> status) {
if (createdBy.isPresent() && status.isPresent()) {
return tasksRepository.findByStatusAndCreatedBy(status.get(), createdBy.get());
} else if (createdBy.isPresent()) {
return tasksRepository.findByCreatedBy(createdBy.get());
} else if (status.isPresent()) {
return tasksRepository.findByStatus(status.get());
} else {
return tasksRepository.findAll();
}
}
@Transactional
public TaskRecord updateTask(String id, Optional<String> newStatus, Optional<String> newAssignedTo) {
var task = tasksRepository.findById(id).orElseThrow(() -> new UnknownTaskException(id));
newStatus.ifPresent(task::setStatus);
newAssignedTo.ifPresent(task::setAssignedTo);
return task;
}
public TaskRecord createTask(String title, String createdBy) {
var task = new TaskRecord(UUID.randomUUID().toString(),
title,
Instant.now(),
createdBy,
null,
"PENDING");
tasksRepository.save(task);
return task;
}
}

24
lightrun/tasks-service/src/main/java/com/baeldung/tasksservice/service/UnknownTaskException.java Normal file
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@ -0,0 +1,24 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.tasksservice.service;
public class UnknownTaskException extends RuntimeException {
private final String id;
public UnknownTaskException(final String id) {
this.id = id;
}
public String getId() {
return id;
}
}

13
lightrun/tasks-service/src/main/resources/application.properties Normal file
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@ -0,0 +1,13 @@
server.port=8082
spring.artemis.mode=EMBEDDED
spring.artemis.host=localhost
spring.artemis.port=61616
spring.artemis.embedded.enabled=true
spring.jms.template.default-destination=my-queue-1
logging.level.org.apache.activemq.audit.base=WARN
logging.level.org.apache.activemq.audit.message=WARN

13
lightrun/tasks-service/src/main/resources/db/migration/V1_0_0__create-tasks-table.sql Normal file
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@ -0,0 +1,13 @@
CREATE TABLE tasks (
task_id VARCHAR(36) PRIMARY KEY,
title VARCHAR(100) NOT NULL,
created_at DATETIME NOT NULL,
created_by VARCHAR(36) NOT NULL,
assigned_to VARCHAR(36) NULL,
status VARCHAR(20) NOT NULL
);
INSERT INTO tasks(task_id, title, created_at, created_by, assigned_to, status) VALUES
('createdemoapplication1', 'Create demo applications - Tasks', '2022-05-05 12:34:56', 'baeldung', 'coxg', 'IN_PROGRESS'),
('createdemoapplication2', 'Create demo applications - Users', '2022-05-05 12:34:56', 'baeldung', NULL, 'PENDING'),
('createdemoapplication3', 'Create demo applications - API', '2022-05-05 12:34:56', 'baeldung', NULL, 'PENDING');

33
lightrun/users-service/.gitignore vendored Normal file
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@ -0,0 +1,33 @@
HELP.md
target/
!.mvn/wrapper/maven-wrapper.jar
!**/src/main/**/target/
!**/src/test/**/target/
### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr
### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
build/
!**/src/main/**/build/
!**/src/test/**/build/
### VS Code ###
.vscode/

29
lightrun/users-service/README.md Normal file
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@ -0,0 +1,29 @@
# Lightrun Example Application - Tasks Management
This application exists as an example for the Lightrun series of articles.
## Building
This application requires [Apache Maven](https://maven.apache.org/) and [Java 17+](https://www.oracle.com/java/technologies/downloads/). It does use the Maven Wrapper, so it can be built with only Java available on the path.
As such, building the code is done by executing:
```
$ ./mvnw install
```
from the top level.
## Running
The application consists of three services:
* Tasks
* Users
* API
These are all Spring Boot applications.
The Tasks and Users services exist as microservices for managing one facet of data. Each uses a database, and utilise a JMS queue between them as well. For convenience this infrastructure is all embedded in the applications.
This does mean that the startup order is important. The JMS queue exists within the Tasks service and is connected to from the Users service. As such, the Tasks service must be started before the others.
Each service can be started either by executing `mvn spring-boot:run` from within the appropriate directory. Alternatively, as Spring Boot applications, the build will produce an executable JAR file within the `target` directory that can be executed as, for example:
```
$ java -jar ./target/tasks-service-0.0.1-SNAPSHOT.jar
```

63
lightrun/users-service/pom.xml Normal file
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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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.6.7</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.baeldung</groupId>
<artifactId>users-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>users-service</name>
<description>Users Service for LightRun Article</description>
<properties>
<java.version>17</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-artemis</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>org.flywaydb</groupId>
<artifactId>flyway-core</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>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

29
lightrun/users-service/src/main/java/com/baeldung/usersservice/JmsConfig.java Normal file
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@ -0,0 +1,29 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.usersservice;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jms.support.converter.MappingJackson2MessageConverter;
import org.springframework.jms.support.converter.MessageConverter;
import org.springframework.jms.support.converter.MessageType;
@Configuration
public class JmsConfig {
@Bean
public MessageConverter jacksonJmsMessageConverter() {
MappingJackson2MessageConverter converter = new MappingJackson2MessageConverter();
converter.setTargetType(MessageType.TEXT);
converter.setTypeIdPropertyName("_type");
return converter;
}
}

13
lightrun/users-service/src/main/java/com/baeldung/usersservice/UsersServiceApplication.java Normal file
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@ -0,0 +1,13 @@
package com.baeldung.usersservice;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class UsersServiceApplication {
public static void main(String[] args) {
SpringApplication.run(UsersServiceApplication.class, args);
}
}

15
lightrun/users-service/src/main/java/com/baeldung/usersservice/adapters/http/CreateUserRequest.java Normal file
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@ -0,0 +1,15 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.usersservice.adapters.http;
public record CreateUserRequest(String name) {
}

17
lightrun/users-service/src/main/java/com/baeldung/usersservice/adapters/http/PatchUserRequest.java Normal file
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@ -0,0 +1,17 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.usersservice.adapters.http;
import java.util.Optional;
public record PatchUserRequest(Optional<String> name) {
}

16
lightrun/users-service/src/main/java/com/baeldung/usersservice/adapters/http/UserResponse.java Normal file
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@ -0,0 +1,16 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.usersservice.adapters.http;
public record UserResponse(String id,
String name) {
}

69
lightrun/users-service/src/main/java/com/baeldung/usersservice/adapters/http/UsersController.java Normal file
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@ -0,0 +1,69 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.usersservice.adapters.http;
import com.baeldung.usersservice.adapters.repository.UserRecord;
import com.baeldung.usersservice.service.UsersService;
import com.baeldung.usersservice.service.UnknownUserException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PatchMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/")
class UsersController {
@Autowired
private UsersService usersService;
@GetMapping("/{id}")
public UserResponse getUser(@PathVariable("id") String id) {
var user = usersService.getUserById(id);
return buildResponse(user);
}
@DeleteMapping("/{id}")
public void deleteUser(@PathVariable("id") String id) {
usersService.deleteUserById(id);
}
@PostMapping
@ResponseStatus(HttpStatus.CREATED)
public UserResponse createUser(@RequestBody CreateUserRequest body) {
var user = usersService.createUser(body.name());
return buildResponse(user);
}
@PatchMapping("/{id}")
public UserResponse patchUser(@PathVariable("id") String id,
@RequestBody PatchUserRequest body) {
var user = usersService.updateUser(id, body.name());
return buildResponse(user);
}
private UserResponse buildResponse(final UserRecord user) {
return new UserResponse(user.getId(), user.getName());
}
@ExceptionHandler(UnknownUserException.class)
@ResponseStatus(HttpStatus.NOT_FOUND)
public void handleUnknownUser() {
}
}

5
lightrun/users-service/src/main/java/com/baeldung/usersservice/adapters/http/http-client.env.json Normal file
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@ -0,0 +1,5 @@
{
"local-users": {
"host": "localhost:8081"
}
}

25
lightrun/users-service/src/main/java/com/baeldung/usersservice/adapters/http/users.http Normal file
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@ -0,0 +1,25 @@
GET http://{{host}}/baeldung HTTP/1.1
###
GET http://{{host}}/unknown HTTP/1.1
###
DELETE http://{{host}}/baeldung HTTP/1.1
###
DELETE http://{{host}}/unknown HTTP/1.1
###
POST http://{{host}} HTTP/1.1
Content-Type: application/json
{
"name": "Testing"
}
###
PATCH http://{{host}}/coxg HTTP/1.1
Content-Type: application/json
{
"name": "Test Name"
}

26
lightrun/users-service/src/main/java/com/baeldung/usersservice/adapters/jms/JmsSender.java Normal file
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@ -0,0 +1,26 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.usersservice.adapters.jms;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.stereotype.Repository;
@Repository
public class JmsSender {
@Autowired
private JmsTemplate jmsTemplate;
public void sendDeleteUserMessage(String userId) {
jmsTemplate.convertAndSend("deleted_user", userId);
}
}

47
lightrun/users-service/src/main/java/com/baeldung/usersservice/adapters/repository/UserRecord.java Normal file
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@ -0,0 +1,47 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.usersservice.adapters.repository;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "users")
public class UserRecord {
@Id
@Column(name = "user_id")
private String id;
private String name;
public UserRecord(final String id, final String name) {
this.id = id;
this.name = name;
}
private UserRecord() {
// Needed for JPA
}
public String getId() {
return id;
}
public String getName() {
return name;
}
public void setName(final String name) {
this.name = name;
}
}

19
lightrun/users-service/src/main/java/com/baeldung/usersservice/adapters/repository/UsersRepository.java Normal file
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@ -0,0 +1,19 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.usersservice.adapters.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface UsersRepository extends JpaRepository<UserRecord, String> {
}

24
lightrun/users-service/src/main/java/com/baeldung/usersservice/service/UnknownUserException.java Normal file
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@ -0,0 +1,24 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.usersservice.service;
public class UnknownUserException extends RuntimeException {
private final String id;
public UnknownUserException(final String id) {
this.id = id;
}
public String getId() {
return id;
}
}

61
lightrun/users-service/src/main/java/com/baeldung/usersservice/service/UsersService.java Normal file
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@ -0,0 +1,61 @@
/****************************************************************************************************************
*
* Copyright (c) 2022 OCLC, Inc. All Rights Reserved.
*
* OCLC proprietary information: the enclosed materials contain
* proprietary information of OCLC, Inc. and shall not be disclosed in whole or in
* any part to any third party or used by any person for any purpose, without written
* consent of OCLC, Inc. Duplication of any portion of these materials shall include this notice.
*
******************************************************************************************************************/
package com.baeldung.usersservice.service;
import javax.transaction.Transactional;
import java.time.Instant;
import java.util.Optional;
import java.util.UUID;
import com.baeldung.usersservice.adapters.jms.JmsSender;
import com.baeldung.usersservice.adapters.repository.UserRecord;
import com.baeldung.usersservice.adapters.repository.UsersRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.stereotype.Service;
@Service
public class UsersService {
@Autowired
private UsersRepository usersRepository;
@Autowired
private JmsSender jmsSender;
public UserRecord getUserById(String id) {
return usersRepository.findById(id).orElseThrow(() -> new UnknownUserException(id));
}
@Transactional
public void deleteUserById(String id) {
var user = usersRepository.findById(id).orElseThrow(() -> new UnknownUserException(id));
usersRepository.delete(user);
jmsSender.sendDeleteUserMessage(id);
}
@Transactional
public UserRecord updateUser(String id, Optional<String> newName) {
var user = usersRepository.findById(id).orElseThrow(() -> new UnknownUserException(id));
newName.ifPresent(user::setName);
return user;
}
public UserRecord createUser(String name) {
var user = new UserRecord(UUID.randomUUID().toString(), name);
usersRepository.save(user);
return user;
}
}

10
lightrun/users-service/src/main/resources/application.properties Normal file
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@ -0,0 +1,10 @@
server.port=8081
spring.artemis.host=localhost
spring.artemis.port=61616
spring.jms.template.default-destination=my-queue-1
logging.level.org.apache.activemq.audit.base=WARN
logging.level.org.apache.activemq.audit.message=WARN

8
lightrun/users-service/src/main/resources/db/migration/V1_0_0__create-users-table.sql Normal file
View File

@ -0,0 +1,8 @@
CREATE TABLE users (
user_id VARCHAR(36) PRIMARY KEY,
name VARCHAR(100) NOT NULL
);
INSERT INTO users(user_id, name) VALUES
('baeldung', 'Baeldung'),
('coxg', 'Graham');

2
pom.xml
View File

@ -1329,6 +1329,7 @@
<module>spring-boot-modules/spring-boot-camel</module>
<module>testing-modules/testing-assertions</module>
<module>persistence-modules/fauna</module>
<module>lightrun</module>
</modules>
</profile>
@ -1396,6 +1397,7 @@
<module>spring-boot-modules/spring-boot-camel</module>
<module>testing-modules/testing-assertions</module>
<module>persistence-modules/fauna</module>
<module>lightrun</module>
</modules>
</profile>
</profiles>