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Liferay7 BPM门户开发之3: Activiti开发环境搭建

2024-08-16 04:52:12   220人阅读

下载地址：

http://activiti.org/download.html

源码：

https://github.com/Activiti/Activiti

 

环境准备(检查项)：

    • JDK 1.7 + JAVA_HOME ：java -version
    • 下载 Eclipse Indigo +
    • 拷贝activiti-explorer.war 到 Tomcat/webapps目录
    • 运行Tomcat/bin目录startup.bat or startup.sh
    • 不修改Tomcat http端口情况下访问：http://localhost:8080/activiti-explorer

    • 如果不想使用in-memory H2 database（默认演示数据库），修改WEB-INF/classes下文件db.properties；
      默认情况下，会创建user and groups, process definitions and models演示数据，如果不想建立，则设置WEB-INF/classes/engine.properties文件，修改为false

    • jar包依赖下载，通过Maven：mvn dependency:copy-dependencies on a module of the Activiti source code.
    • jar包依赖下载，通过放入classpath方式（直接引入依赖）

      • org.activiti:activiti-engine:jar:5.17.0
        +- org.activiti:activiti-bpmn-converter:jar:5.17.0:compile
        | \- org.activiti:activiti-bpmn-model:jar:5.17.0:compile
        | +- com.fasterxml.jackson.core:jackson-core:jar:2.2.3:compile
        | \- com.fasterxml.jackson.core:jackson-databind:jar:2.2.3:compile
        | \- com.fasterxml.jackson.core:jackson-annotations:jar:2.2.3:compile
        +- org.activiti:activiti-process-validation:jar:5.17.0:compile
        +- org.activiti:activiti-image-generator:jar:5.17.0:compile
        +- org.apache.commons:commons-email:jar:1.2:compile
        | +- javax.mail:mail:jar:1.4.1:compile
        | \- javax.activation:activation:jar:1.1:compile
        +- org.apache.commons:commons-lang3:jar:3.3.2:compile
        +- org.mybatis:mybatis:jar:3.2.5:compile
        +- org.springframework:spring-beans:jar:4.0.6.RELEASE:compile
        | \- org.springframework:spring-core:jar:4.0.6.RELEASE:compile
        +- joda-time:joda-time:jar:2.6:compile
        +- org.slf4j:slf4j-api:jar:1.7.6:compile
        +- org.slf4j:jcl-over-slf4j:jar:1.7.6:compile

    • 演示用户ID

UserIdPasswordSecurity roles

kermit

kermit

admin

gonzo

gonzo

manager

fozzie

fozzie

user

 

 

开发准备：

配置项：activiti.cfg.xml

Spring配置：

<beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xsi:schemaLocation="http://www.springframework.org/schema/beans   http://www.springframework.org/schema/beans/spring-beans.xsd">  <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">    <property name="jdbcUrl" value="jdbc:h2:mem:activiti;DB_CLOSE_DELAY=1000" />    <property name="jdbcDriver" value="org.h2.Driver" />    <property name="jdbcUsername" value="sa" />    <property name="jdbcPassword" value="" />    <property name="databaseSchemaUpdate" value="true" />    <property name="jobExecutorActivate" value="false" />    <property name="asyncExecutorEnabled" value="true" />    <property name="asyncExecutorActivate" value="false" />    <property name="mailServerHost" value="mail.my-corp.com" />    <property name="mailServerPort" value="5025" />  </bean></beans>
  • 一般情况可以这样创建引擎实例（即读取activiti.cfg.xml）：ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine()
  •  也可以使用beanid：ProcessEngineConfiguration.createProcessEngineConfigurationFromResource(String resource, String beanName);
  • 也可以通过程序设置：
ProcessEngine processEngine = ProcessEngineConfiguration.createStandaloneInMemProcessEngineConfiguration()  .setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_FALSE)  .setJdbcUrl("jdbc:h2:mem:my-own-db;DB_CLOSE_DELAY=1000")  .setAsyncExecutorEnabled(true)  .setAsyncExecutorActivate(false)  .buildProcessEngine();

DBCP 数据连接方式

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" >  <property name="driverClassName" value="com.mysql.jdbc.Driver" />  <property name="url" value="jdbc:mysql://localhost:3306/activiti" />  <property name="username" value="activiti" />  <property name="password" value="activiti" />  <property name="defaultAutoCommit" value="false" /></bean><bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">    <property name="dataSource" ref="dataSource" />    ...

JNDI Datasource数据连接方式

配置db.properties配置JNDI datasource：
activiti-webapp-explorer2/src/webapp/WEB-INF/activiti-standalone-context.xml
activiti-webapp-rest2/src/main/resources/activiti-context.xml

删除 beans named "dbProperties" and "dataSource".
添加：

<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">    <property name="jndiName" value="java:comp/env/jdbc/activitiDB"/></bean>

替换activiti-webapp-explorer2/src/main/webapp/META-INF/context.xml：

<Context antiJARLocking="true" path="/activiti-explorer2">    <Resource auth="Container"              name="jdbc/activitiDB"              type="javax.sql.DataSource"              scope="Shareable"              description="JDBC DataSource"              url="jdbc:h2:mem:activiti;DB_CLOSE_DELAY=1000"              driverClassName="org.h2.Driver"              username="sa"              password=""              defaultAutoCommit="false"              initialSize="5"              maxWait="5000"              maxActive="120"              maxIdle="5"/></Context>

替换activiti-webapp-rest2/src/main/webapp/META-INF/context.xml ：

<?xml version="1.0" encoding="UTF-8"?><Context antiJARLocking="true" path="/activiti-rest2">    <Resource auth="Container"              name="jdbc/activitiDB"              type="javax.sql.DataSource"              scope="Shareable"              description="JDBC DataSource"              url="jdbc:h2:mem:activiti;DB_CLOSE_DELAY=-1"              driverClassName="org.h2.Driver"              username="sa"              password=""              defaultAutoCommit="false"              initialSize="5"              maxWait="5000"              maxActive="120"              maxIdle="5"/></Context>

Tomcat 环境下, the JNDI resource：

$CATALINA_BASE/conf/[enginename]/[hostname]/[warname].xml

$CATALINA_BASE/conf/Catalina/localhost/activiti-explorer.xml

<?xml version="1.0" encoding="UTF-8"?>    <Context antiJARLocking="true" path="/activiti-explorer2">        <Resource auth="Container"            name="jdbc/activitiDB"            type="javax.sql.DataSource"            description="JDBC DataSource"            url="jdbc:mysql://localhost:3306/activiti"            driverClassName="com.mysql.jdbc.Driver"            username="sa"            password=""            defaultAutoCommit="false"            initialSize="5"            maxWait="5000"            maxActive="120"            maxIdle="5"/>        </Context>

 

支持的数据库

databases ：

Activiti database typeExample JDBC URLNotes

h2

jdbc:h2:tcp://localhost/activiti

Default configured database

mysql

jdbc:mysql://localhost:3306/activiti?autoReconnect=true

Tested using mysql-connector-java database driver

oracle

jdbc:oracle:thin:@localhost:1521:xe

 

postgres

jdbc:postgresql://localhost:5432/activiti

 

db2

jdbc:db2://localhost:50000/activiti

 

mssql

jdbc:sqlserver://localhost:1433;databaseName=activiti (jdbc.driver=com.microsoft.sqlserver.jdbc.SQLServerDriver)OR jdbc:jtds:sqlserver://localhost:1433/activiti (jdbc.driver=net.sourceforge.jtds.jdbc.Driver)

Tested using Microsoft JDBC Driver 4.0 (sqljdbc4.jar) and JTDS Driver

 

建立数据库表和索引的方式1：通过程序建立

  • Add the activiti-engine jars to your classpath

  • Add a suitable database driver,比如mysql-connector-java

  • 添加配置文件 (activiti.cfg.xml) to your classpath

  • Execute the main method of the DbSchemaCreate class

建立数据库表和索引的方式2：运行SQL脚本

SQL脚本在 database/create 目录

前缀缩写含义

  • ACT_RE_*: RE stands for repository.

  • ACT_RU_*: RU stands for runtime. runtime data of process instances, user tasks, variables, jobs, etc. 

  • ACT_ID_*: ID stands for identity. users, groups...

  • ACT_HI_*: HI stands for history. past process instances, variables, tasks...

  • ACT_GE_*: general data, which is used in various use cases.

 

主要的类

ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();RuntimeService runtimeService = processEngine.getRuntimeService();RepositoryService repositoryService = processEngine.getRepositoryService();TaskService taskService = processEngine.getTaskService();ManagementService managementService = processEngine.getManagementService();IdentityService identityService = processEngine.getIdentityService();HistoryService historyService = processEngine.getHistoryService();FormService formService = processEngine.getFormService();

技术分享

 

通过程序部署流程

新建 xml file VacationRequest.bpmn20.xml in the src/test/resources/org/activiti/test resource folder

<?xml version="1.0" encoding="UTF-8" ?><definitions id="definitions"             targetNamespace="http://activiti.org/bpmn20"             xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"             xmlns:activiti="http://activiti.org/bpmn">  <process id="vacationRequest" name="Vacation request">    <startEvent id="request" activiti:initiator="employeeName">      <extensionElements>        <activiti:formProperty id="numberOfDays" name="Number of days" type="long" value="1" required="true"/>        <activiti:formProperty id="startDate" name="First day of holiday (dd-MM-yyy)" datePattern="dd-MM-yyyy hh:mm" type="date" required="true" />        <activiti:formProperty id="vacationMotivation" name="Motivation" type="string" />      </extensionElements>    </startEvent>    <sequenceFlow id="flow1" sourceRef="request" targetRef="handleRequest" />    <userTask id="handleRequest" name="Handle vacation request" >      <documentation>        ${employeeName} would like to take ${numberOfDays} day(s) of vacation (Motivation: ${vacationMotivation}).      </documentation>      <extensionElements>         <activiti:formProperty id="vacationApproved" name="Do you approve this vacation" type="enum" required="true">          <activiti:value id="true" name="Approve" />          <activiti:value id="false" name="Reject" />        </activiti:formProperty>        <activiti:formProperty id="managerMotivation" name="Motivation" type="string" />      </extensionElements>      <potentialOwner>        <resourceAssignmentExpression>          <formalExpression>management</formalExpression>        </resourceAssignmentExpression>      </potentialOwner>    </userTask>    <sequenceFlow id="flow2" sourceRef="handleRequest" targetRef="requestApprovedDecision" />    <exclusiveGateway id="requestApprovedDecision" name="Request approved?" />    <sequenceFlow id="flow3" sourceRef="requestApprovedDecision" targetRef="sendApprovalMail">      <conditionExpression xsi:type="tFormalExpression">${vacationApproved == ‘true‘}</conditionExpression>    </sequenceFlow>    <task id="sendApprovalMail" name="Send confirmation e-mail" />    <sequenceFlow id="flow4" sourceRef="sendApprovalMail" targetRef="theEnd1" />    <endEvent id="theEnd1" />    <sequenceFlow id="flow5" sourceRef="requestApprovedDecision" targetRef="adjustVacationRequestTask">      <conditionExpression xsi:type="tFormalExpression">${vacationApproved == ‘false‘}</conditionExpression>    </sequenceFlow>    <userTask id="adjustVacationRequestTask" name="Adjust vacation request">      <documentation>        Your manager has disapproved your vacation request for ${numberOfDays} days.        Reason: ${managerMotivation}      </documentation>      <extensionElements>        <activiti:formProperty id="numberOfDays" name="Number of days" value="${numberOfDays}" type="long" required="true"/>        <activiti:formProperty id="startDate" name="First day of holiday (dd-MM-yyy)" value="${startDate}" datePattern="dd-MM-yyyy hh:mm" type="date" required="true" />        <activiti:formProperty id="vacationMotivation" name="Motivation" value="${vacationMotivation}" type="string" />        <activiti:formProperty id="resendRequest" name="Resend vacation request to manager?" type="enum" required="true">          <activiti:value id="true" name="Yes" />          <activiti:value id="false" name="No" />        </activiti:formProperty>      </extensionElements>      <humanPerformer>        <resourceAssignmentExpression>          <formalExpression>${employeeName}</formalExpression>        </resourceAssignmentExpression>      </humanPerformer>    </userTask>    <sequenceFlow id="flow6" sourceRef="adjustVacationRequestTask" targetRef="resendRequestDecision" />    <exclusiveGateway id="resendRequestDecision" name="Resend request?" />    <sequenceFlow id="flow7" sourceRef="resendRequestDecision" targetRef="handleRequest">      <conditionExpression xsi:type="tFormalExpression">${resendRequest == ‘true‘}</conditionExpression>    </sequenceFlow>     <sequenceFlow id="flow8" sourceRef="resendRequestDecision" targetRef="theEnd2">      <conditionExpression xsi:type="tFormalExpression">${resendRequest == ‘false‘}</conditionExpression>    </sequenceFlow>    <endEvent id="theEnd2" />  </process></definitions>

部署：

ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();RepositoryService repositoryService = processEngine.getRepositoryService();repositoryService.createDeployment()  .addClasspathResource("org/activiti/test/VacationRequest.bpmn20.xml")  .deploy();Log.info("Number of process definitions: " + repositoryService.createProcessDefinitionQuery().count());

开始一个流程实例：

Map<String, Object> variables = new HashMap<String, Object>();variables.put("employeeName", "Kermit");variables.put("numberOfDays", new Integer(4));variables.put("vacationMotivation", "I‘m really tired!");RuntimeService runtimeService = processEngine.getRuntimeService();ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("vacationRequest", variables);// Verify that we started a new process instanceLog.info("Number of process instances: " + runtimeService.createProcessInstanceQuery().count());

查询任务：

TaskService taskService = processEngine.getTaskService();List<Task> tasks = taskService.createTaskQuery().taskCandidateGroup("management").list();for (Task task : tasks) {  Log.info("Task available: " + task.getName());}

完成任务：

Task task = tasks.get(0);Map<String, Object> taskVariables = new HashMap<String, Object>();taskVariables.put("vacationApproved", "false");taskVariables.put("managerMotivation", "We have a tight deadline!");taskService.complete(task.getId(), taskVariables);

流程挂起：

repositoryService.suspendProcessDefinitionByKey("vacationRequest");try {  runtimeService.startProcessInstanceByKey("vacationRequest");} catch (ActivitiException e) {  e.printStackTrace();}

挂起后重启：

runtimeService.activateProcessInstanceXXX

任务查询：

只能实现AND逻辑

List<Task> tasks = taskService.createTaskQuery()    .taskAssignee("kermit")    .processVariableValueEquals("orderId", "0815")    .orderByDueDate().asc()    .list();

复杂逻辑比如OR逻辑需要自己写SQL

List<Task> tasks = taskService.createNativeTaskQuery()  .sql("SELECT count(*) FROM " + managementService.getTableName(Task.class) + " T WHERE T.NAME_ = #{taskName}")  .parameter("taskName", "gonzoTask")  .list();long count = taskService.createNativeTaskQuery()  .sql("SELECT count(*) FROM " + managementService.getTableName(Task.class) + " T1, "    + managementService.getTableName(VariableInstanceEntity.class) + " V1 WHERE V1.TASK_ID_ = T1.ID_")  .count();

流程变量

一个流程实例可以有任意多的变量process variables，变量用来传递数据。

变量存储在数据表ACT_RU_VARIABLE

通过RuntimeService建立：ProcessInstance startProcessInstanceByKey(String processDefinitionKey, Map<String, Object> variables);

在实例运行时，也可以随时设置变量：

void setVariable(String executionId, String variableName, Object value);void setVariableLocal(String executionId, String variableName, Object value);void setVariables(String executionId, Map<String, ? extends Object> variables);void setVariablesLocal(String executionId, Map<String, ? extends Object> variables);
Map<String, Object> getVariables(String executionId);Map<String, Object> getVariablesLocal(String executionId);Map<String, Object> getVariables(String executionId, Collection<String> variableNames);Map<String, Object> getVariablesLocal(String executionId, Collection<String> variableNames);Object getVariable(String executionId, String variableName);<T> T getVariable(String executionId, String variableName, Class<T> variableClass);execution.getVariables();execution.getVariables(Collection<String> variableNames);execution.getVariable(String variableName);execution.setVariables(Map<String, object> variables);execution.setVariable(String variableName, Object value);

TaskService也可以使用getVariables，这意味着can have local variables that are alive just for the duration of the task

 

Liferay7 BPM门户开发之3: Activiti开发环境搭建


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