/*
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* Copyright (c) 2018-2028, Chill Zhuang All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* Neither the name of the dreamlu.net developer nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* Author: Chill 庄骞 (smallchill@163.com)
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*/
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package org.springblade.flow.engine.controller;
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import lombok.AllArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.flowable.bpmn.model.BpmnModel;
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import org.flowable.common.engine.impl.util.IoUtil;
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import org.flowable.engine.*;
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import org.flowable.engine.history.HistoricActivityInstance;
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import org.flowable.engine.history.HistoricProcessInstance;
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import org.flowable.engine.repository.ProcessDefinition;
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import org.flowable.engine.runtime.ProcessInstance;
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import org.flowable.image.ProcessDiagramGenerator;
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import org.springblade.core.launch.constant.AppConstant;
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import org.springblade.core.tenant.annotation.NonDS;
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import org.springblade.core.tool.api.R;
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import org.springblade.core.tool.utils.StringUtil;
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import org.springblade.flow.core.entity.BladeFlow;
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import org.springblade.flow.engine.service.FlowEngineService;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestParam;
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import org.springframework.web.bind.annotation.RestController;
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import springfox.documentation.annotations.ApiIgnore;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* 流程通用控制器
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*
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* @author Chill
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*/
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@NonDS
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@Slf4j
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@RestController
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@AllArgsConstructor
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@RequestMapping(AppConstant.APPLICATION_FLOW_NAME + "/process")
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@ApiIgnore
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public class FlowProcessController {
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private static final String IMAGE_NAME = "image";
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private static final String XML_NAME = "xml";
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private static final Integer INT_1024 = 1024;
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private final RepositoryService repositoryService;
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private final RuntimeService runtimeService;
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private final HistoryService historyService;
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private final ProcessEngine processEngine;
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private final FlowEngineService flowEngineService;
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/**
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* 获取流转历史列表
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*
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* @param processInstanceId 流程实例id
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* @param startActivityId 开始节点id
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* @param endActivityId 结束节点id
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*/
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@GetMapping(value = "history-flow-list")
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public R<List<BladeFlow>> historyFlowList(@RequestParam String processInstanceId, String startActivityId, String endActivityId) {
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return R.data(flowEngineService.historyFlowList(processInstanceId, startActivityId, endActivityId));
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}
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/**
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* 流程图展示
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*
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* @param processDefinitionId 流程id
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* @param processInstanceId 实例id
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* @param resourceType 资源类型
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* @param response 响应
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*/
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@GetMapping("resource-view")
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public void resourceView(@RequestParam String processDefinitionId, String processInstanceId, @RequestParam(defaultValue = IMAGE_NAME) String resourceType, HttpServletResponse response) throws Exception {
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if (StringUtil.isAllBlank(processDefinitionId, processInstanceId)) {
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return;
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}
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if (StringUtil.isBlank(processDefinitionId)) {
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ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
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processDefinitionId = processInstance.getProcessDefinitionId();
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}
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ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().processDefinitionId(processDefinitionId).singleResult();
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String resourceName = "";
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if (resourceType.equals(IMAGE_NAME)) {
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resourceName = processDefinition.getDiagramResourceName();
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} else if (resourceType.equals(XML_NAME)) {
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resourceName = processDefinition.getResourceName();
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}
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InputStream resourceAsStream = repositoryService.getResourceAsStream(processDefinition.getDeploymentId(), resourceName);
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byte[] b = new byte[1024];
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int len;
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while ((len = resourceAsStream.read(b, 0, INT_1024)) != -1) {
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response.getOutputStream().write(b, 0, len);
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}
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}
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/**
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* 获取流程节点进程图
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*
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* @param processInstanceId 流程实例id
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* @param httpServletResponse http响应
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*/
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@GetMapping(value = "diagram-view")
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public void diagramView(String processInstanceId, HttpServletResponse httpServletResponse) {
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diagram(processInstanceId, httpServletResponse);
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}
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/**
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* 根据流程节点绘图
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*
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* @param processInstanceId 流程实例id
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* @param httpServletResponse http响应
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*/
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private void diagram(String processInstanceId, HttpServletResponse httpServletResponse) {
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// 获得当前活动的节点
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String processDefinitionId;
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// 如果流程已经结束，则得到结束节点
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if (this.isFinished(processInstanceId)) {
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HistoricProcessInstance pi = historyService.createHistoricProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
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processDefinitionId = pi.getProcessDefinitionId();
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} else {
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// 如果流程没有结束，则取当前活动节点
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// 根据流程实例ID获得当前处于活动状态的ActivityId合集
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ProcessInstance pi = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
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processDefinitionId = pi.getProcessDefinitionId();
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}
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List<String> highLightedActivities = new ArrayList<>();
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// 获得活动的节点
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List<HistoricActivityInstance> highLightedActivityList = historyService.createHistoricActivityInstanceQuery().processInstanceId(processInstanceId).orderByHistoricActivityInstanceStartTime().asc().list();
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for (HistoricActivityInstance tempActivity : highLightedActivityList) {
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String activityId = tempActivity.getActivityId();
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highLightedActivities.add(activityId);
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}
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List<String> flows = new ArrayList<>();
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// 获取流程图
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BpmnModel bpmnModel = repositoryService.getBpmnModel(processDefinitionId);
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ProcessEngineConfiguration engConf = processEngine.getProcessEngineConfiguration();
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ProcessDiagramGenerator diagramGenerator = engConf.getProcessDiagramGenerator();
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InputStream in = diagramGenerator.generateDiagram(bpmnModel, "bmp", highLightedActivities, flows, engConf.getActivityFontName(),
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engConf.getLabelFontName(), engConf.getAnnotationFontName(), engConf.getClassLoader(), 1.0, true);
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OutputStream out = null;
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byte[] buf = new byte[1024];
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int length;
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try {
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out = httpServletResponse.getOutputStream();
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while ((length = in.read(buf)) != -1) {
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out.write(buf, 0, length);
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}
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} catch (IOException e) {
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log.error("操作异常", e);
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} finally {
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IoUtil.closeSilently(out);
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IoUtil.closeSilently(in);
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}
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}
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/**
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* 是否已完结
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*
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* @param processInstanceId 流程实例id
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* @return bool
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*/
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private boolean isFinished(String processInstanceId) {
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return historyService.createHistoricProcessInstanceQuery().finished()
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.processInstanceId(processInstanceId).count() > 0;
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}
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}
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