Activiti是领先的轻量级的,以Java为中心的开源BPMN(Business Process Modeling Notation)引擎,实现了真正的流程自动化。下面介绍如何在SpringBoot环境下使用Maven集成Activiti6,来实现流程开发。
org.activiti
activiti-spring-boot-starter-basic
6.0.0
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-jdbc
SpringBoot集成activiti默认会从classpath下的processes目录下读取流程定义文件,所以需要在src/main/resources目录下添加processes目录,并在目录中创建流程文件,添加目录后,目录结构变为:
如果没有processes目录,则需要修改配置spring.activiti.process-definition-location-prefix,指定流程文件存放目录。
Spring集成Activiti6默认支持**.bpmn20.xml和**.bpmn格式的流程定义文件,修改支持的文件格式,通过配置spring.activiti.process-definition-location-suffixes修改
如:
spring:
activiti:
check-process-definitions: true #自动检查、部署流程定义文件
database-schema-update: true #自动更新数据库结构
process-definition-location-prefix: classpath:/processes/ #流程定义文件存放目录
#process-definition-location-suffixes: #流程文件格式
# - **.bpmn20.xml
# - **.bpmn
启动项目时,如果没有流程部署,就不能通过自动注入,使用RuntimeService等API,依赖注入时后报错。
ActivitiProperties中定义了activiti的自动配置项,其他配置请查看ActivitiProperties属性。
添加数据源,项目中添加数据源,初始化数据库结构,后续保存流程数据,
spring :
#data source config
datasource :
driver : com.mysql.jdbc.Driver
url: jdbc:mysql://192.168.105.10:3306/test_db?useUnicode=true&characterEncoding=utf8&useSSL=false&allowMultiQueries=true
username : root
password : mysql
initsize : 10
maxActive : 20
minIdle : 10
maxWait : 120000
poolPreparedStatements : false
maxOpenPreparedStatements : -1
validationQuery : select 1
testOnborrow : true
testOnReturn : true
testWhileIdle : true
timeBetweenEvictionRunsMillis : 120000
filters : log4j,stat
在项目中添加流程,创建文件simple.bpmn,添加内容
编写SpringBoot启动类,启动项目,启动项目。
@SpringBootApplication(scanBasePackages = "com.legao.server")
@EnableSwagger2
public class WorkflowServer {
public static void main(String[] args) {
SpringApplication.run(WorkflowServer.class, args);
}
}
启动时,发现启动报错,
Caused by: java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy
查看activiti-spring-boot-starter-basic-6.0.0.jar发现,org.activiti.spring.boot.SecurityAutoConfiguration编译报错,这时候将SecurityAutoConfiguration排除到SpringBoot启动之外,即@SpringBootApplication注解添加exclude = SecurityAutoConfiguration.class属性
@SpringBootApplication(scanBasePackages = "com.legao.server", exclude = SecurityAutoConfiguration.class)
@EnableSwagger2
public class WorkflowServer {
public static void main(String[] args) {
SpringApplication.run(WorkflowServer.class, args);
}
}
再启动发现启动正常,这时候SpringBoot集成activiti已经启动成功,查看数据库,Activiti6运行所需的28张表也已经创建成功。
ACT_EVT_LOG
ACT_GE_BYTEARRAY
ACT_GE_PROPERTY
ACT_HI_ACTINST
ACT_HI_ATTACHMENT
ACT_HI_COMMENT
ACT_HI_DETAIL
ACT_HI_IDENTITYLINK
ACT_HI_PROCINST
ACT_HI_TASKINST
ACT_HI_VARINST
ACT_ID_GROUP
ACT_ID_INFO
ACT_ID_MEMBERSHIP
ACT_ID_USER
ACT_PROCDEF_INFO
ACT_RE_DEPLOYMENT
ACT_RE_MODEL
ACT_RE_PROCDEF
ACT_RU_DEADLETTER_JOB
ACT_RU_EVENT_SUBSCR
ACT_RU_EXECUTION
ACT_RU_IDENTITYLINK
ACT_RU_JOB
ACT_RU_SUSPENDED_JOB
ACT_RU_TASK
ACT_RU_TIMER_JOB
ACT_RU_VARIABLE
(完)