[example] optimize third flow

ChunelFeng · ChunelFeng · commit 5fa2b9c23bcd · 2023-09-22T23:00:55.000+08:00
diff --git a/example/E03-ThirdFlow.cpp b/example/E03-ThirdFlow.cpp
@@ -33,6 +33,20 @@ struct ResultMParam : public GMessageParam {
     std::string eng_info_;
 };
 
+class InputGNode : public GNode {
+public:
+    CStatus run() override {
+        for (int i = 0; i < 30; i++) {
+            std::unique_ptr<InputMParam> input(new InputMParam());
+            randomSleep(1, 5);    // 间隔1~6ms，发送一次
+            input->num_ = std::abs((int)std::random_device{}()) % 5 + 1;
+            CGRAPH_SEND_MPARAM(InputMParam, INPUT_TOPIC_NAME, input, GMessagePushStrategy::WAIT);
+        }
+
+        CGRAPH_ECHO("InputGNode run finished");
+        return CStatus();
+    }
+};
 
 class ProcessGNode : public GNode {
 public:
@@ -44,7 +58,7 @@ class ProcessGNode : public GNode {
                 break;    // 一阵子收不到消息了，就自动停止好了
             }
 
-            int ms = randomSleep(1, 200);    // 模拟处理流程，随机休息不超过 200ms
+            int ms = randomSleep(1, 100);    // 模拟处理流程，随机休息不超过 100ms
             std::unique_ptr<ResultMParam> result(new ResultMParam);
             switch (input->num_) {
                 case 1: result->eng_info_ = "one"; break;
@@ -89,25 +103,17 @@ void example_third_flow() {
     CGRAPH_CREATE_MESSAGE_TOPIC(ResultMParam, RESULT_TOPIC_NAME, 16);
 
     auto pipeline = GPipelineFactory::create();
-    GElementPtr a, b = nullptr;
-    pipeline->registerGElement<ProcessGNode>(&a);
-    pipeline->registerGElement<ResultGNode>(&b);
+    GElementPtr input, process, result = nullptr;
+    pipeline->registerGElement<InputGNode>(&input);
+    pipeline->registerGElement<ProcessGNode>(&process);
+    pipeline->registerGElement<ResultGNode>(&result);
 
     UThreadPoolConfig config;
-    config.secondary_thread_size_ = 2;
-    pipeline->setUniqueThreadPoolConfig(config);
-
-    auto fut = pipeline->asyncProcess();
-
-    // 在这里，一直制造input信息，然后放到后面的两个流中去处理
-    for (int i = 0; i < 30; i++) {
-        std::unique_ptr<InputMParam> input(new InputMParam());
-        randomSleep(1, 5);    // 间隔1~6ms，发送一次
-        input->num_ = std::abs((int)std::random_device{}()) % 5 + 1;
-        CGRAPH_SEND_MPARAM(InputMParam, INPUT_TOPIC_NAME, input, GMessagePushStrategy::WAIT);
-    }
+    config.default_thread_size_ = 3;
+    config.secondary_thread_size_ = 0;
+    pipeline->setUniqueThreadPoolConfig(config);    // 设置3个线程执行
 
-    fut.wait();    // 等待pipeline执行结束
+    pipeline->process();
     CGRAPH_CLEAR_MESSAGES()
     GPipelineFactory::clear();
 }
