Flowable：关于流程部署、启动、处理、完成各模块的浅析（图解）（一）

ProcessEngineConfiguration configuration = null;
@Before
public void before(){
    // 获取  ProcessEngineConfiguration 对象
    configuration = new StandaloneProcessEngineConfiguration();
    // 配置 相关的数据库的连接信息
    configuration.setJdbcDriver("com.mysql.cj.jdbc.Driver");
    configuration.setJdbcUsername("root");
    configuration.setJdbcPassword("root");
    configuration.setJdbcUrl("jdbc:mysql://localhost:3306/flowable1?serverTimezone=UTC&nullCatalogMeansCurrent=true");
    // 如果数据库中的表结构不存在就新建
    configuration.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
}

// 如果数据库中的表结构不存在就新建
configuration.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);

<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xmlns:xsd="http://www.w3.org/2001/XMLSchema"
             xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI"
             xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC"
             xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI"
             xmlns:flowable="http://flowable.org/bpmn"
             typeLanguage="http://www.w3.org/2001/XMLSchema"
             expressionLanguage="http://www.w3.org/1999/XPath"
             targetNamespace="http://www.flowable.org/processdef">
    <process id="holidayRequest" name="请假流程" isExecutable="true">
        <startEvent id="startEvent"/>
        <sequenceFlow sourceRef="startEvent" targetRef="approveTask"/>
        <userTask id="approveTask" name="同意或者拒绝请假" flowable:assignee="zhangsan"/>
        <sequenceFlow sourceRef="approveTask" targetRef="decision"/>
        <exclusiveGateway id="decision"/>
        <sequenceFlow sourceRef="decision" targetRef="externalSystemCall">
            <conditionExpression xsi:type="tFormalExpression">
                <![CDATA[
          ${approved}
        ]]>
            </conditionExpression>
        </sequenceFlow>
        <sequenceFlow  sourceRef="decision" targetRef="sendRejectionMail">
            <conditionExpression xsi:type="tFormalExpression">
                <![CDATA[
          ${!approved}
        ]]>
            </conditionExpression>
        </sequenceFlow>
        <serviceTask id="externalSystemCall" name="Enter holidays in external system"
                     flowable:class="org.flowable.CallExternalSystemDelegate"/>
        <sequenceFlow sourceRef="externalSystemCall" targetRef="holidayApprovedTask"/>
        <userTask id="holidayApprovedTask" name="Holiday approved"/>
        <sequenceFlow sourceRef="holidayApprovedTask" targetRef="approveEnd"/>
        <serviceTask id="sendRejectionMail" name="Send out rejection email"
                     flowable:class="org.flowable.SendRejectionMail"/>
        <sequenceFlow sourceRef="sendRejectionMail" targetRef="rejectEnd"/>
        <endEvent id="approveEnd"/>
        <endEvent id="rejectEnd"/>
    </process>
</definitions>

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.yyl</groupId>
    <artifactId>FlowableDemoTest</artifactId>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.flowable</groupId>
            <artifactId>flowable-engine</artifactId>
            <version>6.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.flowable</groupId>
            <artifactId>flowable-json-converter</artifactId>
            <version>6.3.0</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.21</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.21</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.21</version>
        </dependency>
    </dependencies>
</project>

/**
* 部署流程
*/
@Test
public void testDeploy(){
   ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
   RepositoryService repositoryService = processEngine.getRepositoryService();
   Deployment deploy = repositoryService.createDeployment()
           .addClasspathResource("holiday-request-new.bpmn20.xml")
           .name("请假流程...")
           .category("请假") // 分类
           .tenantId("dpb") // 租户id
           .deploy();
   System.out.println("deploy.getId() = " + deploy.getId());
   System.out.println("deploy.getName() = " + deploy.getName());
   System.out.println("deploy.getCategory() = " + deploy.getCategory());
}