难以将Activiti配置为Spring Boot应用程序API

Question

首先，将Activiti嵌入API类型应用程序以在该应用程序中使用或者Activiti是否应该独立运行是一件可行的事情？

下面的错误是由于bean的定义，但我不确定应该在哪里定义bean以及如何 - 如果这是正确的版本6的方法。我们使用Springhboot 2的标准是在java而不是xml上下文中注释bean

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-04-10 21:17:43.924 ERROR 19516 --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

Field runtimeService in ma.cvmeeting.workflow.WorkflowApplication$MyrestController required a bean of type 'org.activiti.engine.RuntimeService' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'org.activiti.engine.RuntimeService' in your configuration.


Process finished with exit code 0

码：

import org.activiti.engine.RuntimeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
public class WorkflowApplication {

public static void main(String[] args) {
    SpringApplication.run(WorkflowApplication.class, args);
}



@RestController
public static class MyrestController{


    @Autowired
    private RuntimeService runtimeService;


    @GetMapping("/start-process")
    public String startProcess() {

        runtimeService.startProcessInstanceByKey("Potulerauneoffre");
        return "Process started. Number of currently running"
                + "process instances = "
                + runtimeService.createProcessInstanceQuery().count();
    }
}

pom.hml：

<project>

    <groupId>ma.cvmeeting</groupId>
    <artifactId>workflow</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>workflow</name>
    <description>Demo project for Spring Boot</description>

   <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-engine</artifactId>
            <version>7-201802-EA</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf</artifactId>
            <version>3.0.11.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.h2database</groupId>
            <artifactId>h2database</artifactId>
            <version>1.0.20061217</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </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>

Answer 1

当您将引擎嵌入基于弹簧的应用程序时，有两种方法可以初始化引擎：1。）让spring为您初始化它，这样您就可以立即使用所有引擎服务而无需任何配置。这需要activiti-spring-boot-starter作为依赖。 2.）您自己初始化引擎并提供@Configuration类的服务bean。为此你只需要activiti-engine核心作为依赖

您的应用程序找不到RuntimeService的原因是因为您正在尝试第二种方法在pom.xml中添加以下依赖项并删除引擎

<dependency>
    <groupId>org.activiti</groupId>
    <artifactId>activiti-spring-boot-starter</artifactId>
</dependency>

你应该关注documentation以获得更多帮助。

Answer 2

如果您计划使用spring boot 2.x并使用新API，我们建议使用activiti 7核心。如果您想参与新的API和项目计划，这是非常棒的时间

Answer 3

您可以编写@Configuration类并定义Activiti服务，如下所示：

@Configuration
public class ActivityConfig {

    @Autowired
    DataSource dataSource;

    @Bean
    public DataSourceTransactionManager getTransactionManager() {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean
    public ProcessEngineConfigurationImpl getProcessEngineConfiguration() {
        SpringProcessEngineConfiguration res = new SpringProcessEngineConfiguration();
        res.setDataSource(dataSource);
        res.setTransactionManager(getTransactionManager());
        return res;
    }

    @Bean
    public ProcessEngineFactoryBean getProcessEngine() {
        ProcessEngineFactoryBean res = new ProcessEngineFactoryBean();
        res.setProcessEngineConfiguration(getProcessEngineConfiguration());
        return res;
    }

    @Bean
    public RepositoryService getRepositoryService() throws Exception {
        return getProcessEngine().getObject().getRepositoryService();
    }

    @Bean
    public FormService getFormService() throws Exception {
        return getProcessEngine().getObject().getFormService();
    }

    @Bean
    public TaskService getTaskService() throws Exception {
        return getProcessEngine().getObject().getTaskService();
    }

    @Bean
    public RuntimeService getRuntimeService() throws Exception {
        return getProcessEngine().getObject().getRuntimeService();
    }

    @Bean
    public HistoryService getHistoryService() throws Exception {
        return getProcessEngine().getObject().getHistoryService();
    }

    @Bean
    public IdentityService getIdentityService() throws Exception {
        return getProcessEngine().getObject().getIdentityService();
    }
}