json - 是否有用于 Camunda Rest 响应的 Java 类？

我目前正在尝试使用 camunda rest api 设置从 Spring 到我本地 camunda 实例的 REST 调用。

我是这样设置的:

在我的 localhost:8080 上启动了一个本地 camunda docker 容器，如下所示:https://hub.docker.com/r/camunda/camunda-bpm-platform (我已经测试了与 postman 的通话，他们正在工作)
在我的 pom.xml 中使用几个 camunda 和 rest 依赖项构建了一个 maven 项目:

        <dependency>
            <groupId>org.camunda.bpm.springboot</groupId>
            <artifactId>camunda-bpm-spring-boot-starter</artifactId>
            <version>3.3.1</version>
        </dependency>

        <dependency>
            <groupId>org.camunda.bpm</groupId>
            <artifactId>camunda-engine-rest-core</artifactId>
            <version>7.11.0</version>
        </dependency>

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

        <dependency>
            <groupId>org.projectreactor</groupId>
            <artifactId>reactor-spring</artifactId>
            <version>1.0.1.RELEASE</version>
        </dependency>

编写了一个简单的服务来从 Spring 进行休息调用(取自 https://docs.spring.io/spring-boot/docs/current/reference/html/spring-boot-features.html#boot-features-webclient ):

import org.camunda.bpm.engine.impl.persistence.entity.ProcessDefinitionEntity;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Service;
import org.springframework.web.reactive.function.client.WebClient;
import reactor.core.publisher.Mono;

@Service
public class MyExampleService {

    private final WebClient webClient;

    public MyExampleService (WebClient.Builder webClientBuilder) {
        this.webClient = webClientBuilder.baseUrl("http://localhost:8080").build();
    }

    @Override
    public ProcessDefinitionEntity[] getCamundaProcesses() {

        ProcessDefinitionEntity[] myResponse = this.webClient.get().uri("/engine-rest/process-definition/")
                .retrieve()
                .onStatus(HttpStatus::is4xxClientError, response -> {
                    System.out.println("4xx eror");
                    return Mono.error(new RuntimeException("4xx"));
                })
                .onStatus(HttpStatus::is5xxServerError, response -> {
                    System.out.println("5xx eror");
                    return Mono.error(new RuntimeException("5xx"));
                })
                .bodyToMono(ProcessDefinitionEntity[].class)
                .block();

        return myResponse;
}

所以我基本上使用 Spring WebClient 对 localhost:8080/engine-rest/deployment/ 进行 rest 调用，这应该给我一个所有进程的列表作为 JSON(根据 https://docs.camunda.org/manual/latest/reference/rest/deployment/get-query/ ) .

现在，当我将响应直接转换为 ProcessDefinitionEntity[] 时，它不会将 JSON 转换为它。我还尝试了来自 camunda Java API ( https://docs.camunda.org/javadoc/camunda-bpm-platform/7.11/) 的其他类，例如 ProcessDefinitionDto。

似乎没有一个类(class)符合我从 camunda 得到的回应。响应如下所示:

[
    {
        "id": "invoice:1:cdbc3f02-e6a1-11e9-8de8-0242ac110002",
        "key": "invoice",
        "category": "http://www.omg.org/spec/BPMN/20100524/MODEL",
        "description": null,
        "name": "Invoice Receipt",
        "version": 1,
        "resource": "invoice.v1.bpmn",
        "deploymentId": "cda115de-e6a1-11e9-8de8-0242ac110002",
        "diagram": null,
        "suspended": false,
        "tenantId": null,
        "versionTag": "V1.0",
        "historyTimeToLive": 30,
        "startableInTasklist": true
    },
    {
        "id": "invoice:2:ce03f66c-e6a1-11e9-8de8-0242ac110002",
        "key": "invoice",
        "category": "http://www.omg.org/spec/BPMN/20100524/MODEL",
        "description": null,
        "name": "Invoice Receipt",
        "version": 2,
        "resource": "invoice.v2.bpmn",
        "deploymentId": "cdfbb908-e6a1-11e9-8de8-0242ac110002",
        "diagram": null,
        "suspended": false,
        "tenantId": null,
        "versionTag": "V2.0",
        "historyTimeToLive": 45,
        "startableInTasklist": true
    }
]

(这只是 docker 容器中的两个标准进程)

camunda java api 中是否有与 camunda rest api 的响应正确匹配的类？

附言: 我从 Maven 依赖项(位于 package org.camunda.bpm.engine.rest.dto.repository.ProcessDefinitionDto 中)获得的 ProcessDefinitionDto 如下所示:

public class ProcessDefinitionDto {
    protected String id;
    protected String key;
    protected String category;
    protected String description;
    protected String name;
    protected int version;
    protected String resource;
    protected String deploymentId;
    protected String diagram;
    protected boolean suspended;
    protected String tenantId;
    protected String versionTag;
    protected Integer historyTimeToLive;
    protected boolean isStartableInTasklist;
...

我从 postman 调用 http://localhost:8080/engine-rest/process-definition 得到的响应如下所示:

[
    {
        "id": "b506eb34-e6b1-11e9-8de8-0242ac110002",
        "key": "example_workflow",
        "category": "http://bpmn.io/schema/bpmn",
        "description": null,
        "name": "Just an Example",
        "version": 1,
        "resource": "example_workflow.bpmn",
        "deploymentId": "b503b6e2-e6b1-11e9-8de8-0242ac110002",
        "diagram": null,
        "suspended": false,
        "tenantId": null,
        "versionTag": null,
        "historyTimeToLive": null,
        "startableInTasklist": true
    },
    {
        "id": "invoice:1:cdbc3f02-e6a1-11e9-8de8-0242ac110002",
        "key": "invoice",
        "category": "http://www.omg.org/spec/BPMN/20100524/MODEL",
        "description": null,
        "name": "Invoice Receipt",
        "version": 1,
        "resource": "invoice.v1.bpmn",
        "deploymentId": "cda115de-e6a1-11e9-8de8-0242ac110002",
        "diagram": null,
        "suspended": false,
        "tenantId": null,
        "versionTag": "V1.0",
        "historyTimeToLive": 30,
        "startableInTasklist": true
    },
    {
        "id": "invoice:2:ce03f66c-e6a1-11e9-8de8-0242ac110002",
        "key": "invoice",
        "category": "http://www.omg.org/spec/BPMN/20100524/MODEL",
        "description": null,
        "name": "Invoice Receipt",
        "version": 2,
        "resource": "invoice.v2.bpmn",
        "deploymentId": "cdfbb908-e6a1-11e9-8de8-0242ac110002",
        "diagram": null,
        "suspended": false,
        "tenantId": null,
        "versionTag": "V2.0",
        "historyTimeToLive": 45,
        "startableInTasklist": true
    }
]

最佳答案

中的类

org.camunda.bpm.engine.rest.dto.runtime

适合。 ( https://github.com/camunda/camunda-bpm-platform/tree/master/engine-rest/engine-rest/src/main/java/org/camunda/bpm/engine/rest/dto )

<dependency>
  <groupId>org.camunda.bpm</groupId>
  <artifactId>camunda-engine-rest-core</artifactId>
</dependency>

在您的情况下，它将是 ProcessDefinitionDto 使用 Spring REST 模板的示例:

@Service
@Slf4j
public class RuntimeServiceImpl implements RuntimeService {

    private final RestTemplate rest;
    @Value("${camunda.server.rest.url}")
    private String restURL;

    public RuntimeServiceImpl(RestTemplateBuilder builder) {
        this.rest = builder.build();
    }

    public ProcessDefinitionDto[] getProcessDefinitions() {

        ResponseEntity<ProcessDefinitionDto[]> response = rest.getForEntity(restURL + "process-definition/",
                ProcessDefinitionDto[].class);
        ProcessDefinitionDto[] processes = response.getBody();

        Arrays.stream(processes).forEach(pd -> log.info("Found process definition {} with id {} and key {}", pd.getName(), pd.getId(), pd.getKey()));

        return processes;
    }
}

完整的客户项目:https://github.com/rob2universe/camunda-rest-client

external class client包含您可以重用的更多接口(interface)和 DTO，例如

org.camunda.bpm.client.topic.impl.dto.FetchAndLockRequestDto; org.camunda.bpm.client.topic.impl.dto.TopicRequestDto;

或者只使用/fork 完整的客户端项目。那里已经为您完成了很多工作。

附言以下评论: 响应包括一系列具有以下字段的流程定义:

[
    {
        "id": "AccountOpening:1:a6f88770-0ae7-11ea-9ef3-00155d00d800",
        "key": "AccountOpening",
        "category": "http://bpmn.io/schema/bpmn",
        "description": null,
        "name": "Account Opening",
        "version": 1,
        "resource": "C:\\account-opening\\target\\classes\\bpmn\\AccountOpening.bpmn",
        "deploymentId": "a6cc4747-0ae7-11ea-9ef3-00155d00d800",
        "diagram": null,
        "suspended": false,
        "tenantId": null,
        "versionTag": null,
        "historyTimeToLive": null,
        "startableInTasklist": true
    }

org.camunda.bpm.engine.rest.dto.repository 包中的目标数据结构包含相同的字段:

public class ProcessDefinitionDto {
    protected String id;
    protected String key;
    protected String category;
    protected String description;
    protected String name;
    protected int version;
    protected String resource;
    protected String deploymentId;
    protected String diagram;
    protected boolean suspended;
    protected String tenantId;
    protected String versionTag;
    protected Integer historyTimeToLive;
    protected boolean isStartableInTasklist;
   ...}

如果反序列化失败，请确保您使用的是正确的包(不是例如 org.camunda.bpm.cockpit.impl.plugin.base.dto)

关于json - 是否有用于 Camunda Rest 响应的 Java 类？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/58525407/

json - 是否有用于 Camunda Rest 响应的 Java 类？

上一篇：bixby - 如何让 Bixby 在没有用户的情况下询问输入

下一篇：Clojure:如何在全局范围内启用规范断言？