Camunda工作流引擎框架

工作流相关介绍

BPM（BusinessProcessManagement），业务流程管理是一种管理原则，通常可以代指BPMS（BusinessProcessManagementSuite），是一个实现整合不同系统和数据的流程管理软件套件。

BPMN（BusinessProcessModelandNotation）是基于流程的通用可视化标准。该流程图被设计用于创建业务流程操作的图形化模型。业务流程模型就是图形化对象的网状图，包括活动和用于定义这些活动执行顺序的流程设计器。

项目部署

导入依赖

<properties>
        <camunda.external-task-client.version>7.17.0</camunda.external-task-client.version>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.camunda.bpm</groupId>
            <artifactId>camunda-external-task-client</artifactId>
            <version>${camunda.external-task-client.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.6.1</version>
        </dependency>
        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
            <version>2.3.1</version>
        </dependency>
    </dependencies>

启动类

public class ChargeCardWorker {
    private final static Logger LOGGER = Logger.getLogger(ChargeCardWorker.class.getName());

    public static void main(String[] args) {
        ExternalTaskClient client = ExternalTaskClient.create()
                .baseUrl("http://localhost:8080/engine-rest")
                .asyncResponseTimeout(10000) // long polling timeout
                .build();

        // subscribe to an external task topic as specified in the process
        client.subscribe("charge-card")
                .lockDuration(1000) // the default lock duration is 20 seconds, but you can override this
                .handler((externalTask, externalTaskService) -> {
                    // Put your business logic here

                    // Get a process variable
                    String item = externalTask.getVariable("item");
                    String amount = externalTask.getVariable("amount");

                    LOGGER.info("Charging credit card with an amount of '" + amount + "'€ for the item '" + item + "'...");

                    try {
                        Desktop.getDesktop().browse(new URI("https://docs.camunda.org/get-started/quick-start/complete"));//运行成功后打开camunda的快速启动说明文档
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                    // Complete the task
                    externalTaskService.complete(externalTask);
                })
                .open();
    }
}