初始化 spring cloud 项目的 system 和 infra 模块

yudao-framework/yudao-spring-boot-starter-flowable/src/main/java/cn/iocoder/yudao/framework/flowable/config/YudaoFlowableConfiguration.java

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+package cn.iocoder.yudao.framework.flowable.config;
+
+import cn.iocoder.yudao.framework.common.enums.WebFilterOrderEnum;
+import cn.iocoder.yudao.framework.flowable.core.web.FlowableWebFilter;
+import org.springframework.boot.web.servlet.FilterRegistrationBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class YudaoFlowableConfiguration {
+
+    /**
+     * 配置 flowable Web 过滤器
+     */
+    @Bean
+    public FilterRegistrationBean<FlowableWebFilter> flowableWebFilter() {
+        FilterRegistrationBean<FlowableWebFilter> registrationBean = new FilterRegistrationBean<>();
+        registrationBean.setFilter(new FlowableWebFilter());
+        registrationBean.setOrder(WebFilterOrderEnum.FLOWABLE_FILTER);
+        return registrationBean;
+    }
+}

yudao-framework/yudao-spring-boot-starter-flowable/src/main/java/cn/iocoder/yudao/framework/flowable/core/package-info.java

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+package cn.iocoder.yudao.framework.flowable.core;

yudao-framework/yudao-spring-boot-starter-flowable/src/main/java/cn/iocoder/yudao/framework/flowable/core/util/FlowableUtils.java

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+package cn.iocoder.yudao.framework.flowable.core.util;
+
+import org.flowable.bpmn.converter.BpmnXMLConverter;
+import org.flowable.bpmn.model.BpmnModel;
+import org.flowable.bpmn.model.FlowElement;
+import org.flowable.common.engine.impl.identity.Authentication;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class FlowableUtils {
+
+    public static void setAuthenticatedUserId(Long userId) {
+        Authentication.setAuthenticatedUserId(String.valueOf(userId));
+    }
+
+    public static void clearAuthenticatedUserId() {
+        Authentication.setAuthenticatedUserId(null);
+    }
+
+    /**
+     * 获得 BPMN 流程中，指定的元素们
+     *
+     * @param model
+     * @param clazz 指定元素。例如说，{@link org.flowable.bpmn.model.UserTask}、{@link org.flowable.bpmn.model.Gateway} 等等
+     * @return 元素们
+     */
+    public static <T extends FlowElement> List<T> getBpmnModelElements(BpmnModel model, Class<T> clazz) {
+        List<T> result = new ArrayList<>();
+        model.getProcesses().forEach(process -> {
+            process.getFlowElements().forEach(flowElement -> {
+                if (flowElement.getClass().isAssignableFrom(clazz)) {
+                    result.add((T) flowElement);
+                }
+            });
+        });
+        return result;
+    }
+
+    /**
+     * 比较 两个bpmnModel 是否相同
+     * @param oldModel  老的bpmn model
+     * @param newModel 新的bpmn model
+     */
+    public static boolean equals(BpmnModel oldModel, BpmnModel newModel) {
+        // 由于 BpmnModel 未提供 equals 方法，所以只能转成字节数组，进行比较
+        return Arrays.equals(getBpmnBytes(oldModel), getBpmnBytes(newModel));
+    }
+
+    /**
+     * 把 bpmnModel 转换成 byte[]
+     * @param model  bpmnModel
+     */
+    public  static byte[] getBpmnBytes(BpmnModel model) {
+        if (model == null) {
+            return new byte[0];
+        }
+        BpmnXMLConverter converter = new BpmnXMLConverter();
+        return converter.convertToXML(model);
+    }
+}

yudao-framework/yudao-spring-boot-starter-flowable/src/main/java/cn/iocoder/yudao/framework/flowable/core/web/FlowableWebFilter.java

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+package cn.iocoder.yudao.framework.flowable.core.web;
+
+import cn.iocoder.yudao.framework.flowable.core.util.FlowableUtils;
+import cn.iocoder.yudao.framework.security.core.util.SecurityFrameworkUtils;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+/**
+ * flowable Web 过滤器，将 userId 设置到 {@link org.flowable.common.engine.impl.identity.Authentication} 中
+ *
+ * @author jason
+ */
+public class FlowableWebFilter extends OncePerRequestFilter {
+
+    @Override
+    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
+            throws ServletException, IOException {
+        try {
+            // 设置工作流的用户
+            Long userId = SecurityFrameworkUtils.getLoginUserId();
+            if (userId != null) {
+                FlowableUtils.setAuthenticatedUserId(userId);
+            }
+            // 过滤
+            chain.doFilter(request, response);
+        } finally {
+            // 清理
+            FlowableUtils.clearAuthenticatedUserId();
+        }
+    }
+}

yudao-framework/yudao-spring-boot-starter-flowable/src/main/java/cn/iocoder/yudao/framework/flowable/package-info.java

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+package cn.iocoder.yudao.framework.flowable;

yudao-framework/yudao-spring-boot-starter-flowable/src/main/resources/META-INF/spring.factories

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+org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
+  cn.iocoder.yudao.framework.flowable.config.YudaoFlowableConfiguration