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Adding source files for the tutorial BAEL-2788 (eugenp#6699)
* Adding source files for the tutorial BAEL-2788 * Made changes to the code for the review comments
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‎pom.xml‎

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<module>software-security/sql-injection-samples</module>
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<module>tensorflow-java</module>
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<module>spring-boot-flowable</module>
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</modules>
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</profile>
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<module>xstream</module>
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<module>tensorflow-java</module>
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<module>spring-boot-flowable</module>
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</modules>
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<module>persistence-modules/spring-data-eclipselink</module>
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<module>persistence-modules/spring-data-solr</module>
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<module>persistence-modules/spring-hibernate-5</module>
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<module>spring-boot-flowable</module>
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</modules>
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</profile>

‎spring-boot-flowable/README.md‎

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### Relevant articles
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- [Introduction to Flowable](http://www.baeldung.com/flowable)

‎spring-boot-flowable/pom.xml‎

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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"
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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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<artifactId>spring-boot-flowable</artifactId>
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<packaging>war</packaging>
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<name>spring-boot-flowable</name>
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<description>Spring Boot Flowable Module</description>
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<parent>
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<artifactId>parent-boot-2</artifactId>
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<groupId>com.baeldung</groupId>
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<version>0.0.1-SNAPSHOT</version>
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<relativePath>../parent-boot-2</relativePath>
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</parent>
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<dependencies>
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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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</dependency>
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<dependency>
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<groupId>com.h2database</groupId>
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<artifactId>h2</artifactId>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>org.flowable</groupId>
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<artifactId>flowable-spring-boot-starter-rest</artifactId>
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<version>${flowable.version}</version>
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</dependency>
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<dependency>
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<groupId>org.flowable</groupId>
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<artifactId>flowable-spring-boot-starter-actuator</artifactId>
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<version>${flowable.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-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-engine</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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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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</plugin>
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</plugins>
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</build>
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<properties>
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<flowable.version>6.4.1</flowable.version>
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</properties>
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</project>

‎spring-boot-flowable/src/main/java/com/baeldung/Application.java‎

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package com.baeldung;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class Application {
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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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}

‎spring-boot-flowable/src/main/java/com/baeldung/controller/ArticleWorkflowController.java‎

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package com.baeldung.controller;
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import java.util.List;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.PostMapping;
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import org.springframework.web.bind.annotation.RequestBody;
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import org.springframework.web.bind.annotation.RequestParam;
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import org.springframework.web.bind.annotation.RestController;
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import com.baeldung.domain.Approval;
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import com.baeldung.domain.Article;
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import com.baeldung.service.ArticleWorkflowService;
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@RestController
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public class ArticleWorkflowController {
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@Autowired
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private ArticleWorkflowService service;
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@PostMapping("/submit")
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public void submit(@RequestBody Article article) {
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service.startProcess(article);
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}
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@GetMapping("/tasks")
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public List<Article> getTasks(@RequestParam String assignee) {
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return service.getTasks(assignee);
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}
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@PostMapping("/review")
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public void review(@RequestBody Approval approval) {
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service.submitReview(approval);
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}
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}

‎spring-boot-flowable/src/main/java/com/baeldung/domain/Approval.java‎

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package com.baeldung.domain;
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public class Approval {
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private String id;
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private boolean status;
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public String getId() {
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return id;
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}
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public void setId(String id) {
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this.id = id;
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}
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public boolean isStatus() {
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return status;
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}
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public void setStatus(boolean status) {
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this.status = status;
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}
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}

‎spring-boot-flowable/src/main/java/com/baeldung/domain/Article.java‎

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package com.baeldung.domain;
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public class Article {
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private String id;
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private String author;
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private String url;
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public Article() {
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}
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public Article(String author, String url) {
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this.author = author;
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this.url = url;
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}
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public Article(String id, String author, String url) {
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this.id = id;
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this.author = author;
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this.url = url;
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}
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public String getId() {
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return id;
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}
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public void setId(String id) {
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this.id = id;
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}
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public String getAuthor() {
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return author;
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}
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public void setAuthor(String author) {
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this.author = author;
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}
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public String getUrl() {
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return url;
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}
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public void setUrl(String url) {
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this.url = url;
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}
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@Override
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public String toString() {
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return ("[" + this.author + " " + this.url + "]");
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}
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}

‎spring-boot-flowable/src/main/java/com/baeldung/service/ArticleWorkflowService.java‎

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package com.baeldung.service;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.stream.Collectors;
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import org.flowable.engine.RuntimeService;
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import org.flowable.engine.TaskService;
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import org.flowable.task.api.Task;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import com.baeldung.domain.Approval;
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import com.baeldung.domain.Article;
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@Service
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public class ArticleWorkflowService {
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@Autowired
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private RuntimeService runtimeService;
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@Autowired
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private TaskService taskService;
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@Transactional
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public void startProcess(Article article) {
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Map<String, Object> variables = new HashMap<String, Object>();
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variables.put("author", article.getAuthor());
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variables.put("url", article.getUrl());
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runtimeService.startProcessInstanceByKey("articleReview", variables);
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}
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@Transactional
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public List<Article> getTasks(String assignee) {
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List<Task> tasks = taskService.createTaskQuery()
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.taskCandidateGroup(assignee)
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.list();
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List<Article> articles = tasks.stream()
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.map(task -> {
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Map<String, Object> variables = taskService.getVariables(task.getId());
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return new Article(
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task.getId(), (String) variables.get("author"), (String) variables.get("url"));
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})
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.collect(Collectors.toList());
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return articles;
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}
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@Transactional
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public void submitReview(Approval approval) {
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Map<String, Object> variables = new HashMap<String, Object>();
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variables.put("approved", approval.isStatus());
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taskService.complete(approval.getId(), variables);
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}
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}

‎spring-boot-flowable/src/main/java/com/baeldung/service/PublishArticleService.java‎

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package com.baeldung.service;
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import org.flowable.engine.delegate.DelegateExecution;
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import org.flowable.engine.delegate.JavaDelegate;
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public class PublishArticleService implements JavaDelegate {
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public void execute(DelegateExecution execution) {
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System.out.println("Publishing the approved article.");
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}
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}

‎spring-boot-flowable/src/main/java/com/baeldung/service/SendMailService.java‎

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package com.baeldung.service;
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import org.flowable.engine.delegate.DelegateExecution;
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import org.flowable.engine.delegate.JavaDelegate;
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public class SendMailService implements JavaDelegate {
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public void execute(DelegateExecution execution) {
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System.out.println("Sending rejection mail to author.");
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}
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}

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