Add redis-ping demo

.gitignore

@@ -7,6 +7,9 @@
 # pyenv
 .idea/
 
+# vscode
+.vscode
+
 # Compiled Object files
 *.slo
 *.lo
@@ -36,3 +39,4 @@
 *.exe
 *.out
 *.app
+main

task/PingTask.cpp

@@ -0,0 +1,48 @@
+#include "PingTask.h"
+using namespace yazi::task;
+
+#include "Logger.h"
+#include "Singleton.h"
+using namespace yazi::utility;
+
+#include "SocketHandler.h"
+using namespace yazi::socket;
+#include <cstdio>
+#include <unistd.h>
+
+
+PingTask::PingTask(Socket * socket) : Task(socket)
+{
+}
+
+PingTask::~PingTask()
+{
+}
+
+void PingTask::run()
+{
+    debug("Ping task run");
+    SocketHandler * handler = Singleton<SocketHandler>::instance();
+
+    Socket * socket = static_cast<Socket *>(m_data);
+    char buf[8192];
+    memset(buf, 0, 8192);
+    int len = socket->recv(buf, 8192);
+    if (len > 0)
+    {
+        debug("recv msg len: %d", len);
+        socket->send("+OK\r\n", 5);
+        handler->attach(socket);
+    }
+    else
+    {
+        debug("Ping task socket closed by peer");
+        handler->remove(socket);
+    }
+}
+
+void PingTask::destroy()
+{
+    debug("Ping task destroy");
+    delete this;
+}

task/PingTask.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include "Task.h"
+using namespace yazi::thread;
+
+#include "Socket.h"
+using namespace yazi::socket;
+
+namespace yazi {
+namespace task {
+
+class PingTask : public Task
+{
+public:
+    PingTask(Socket * socket);
+    virtual ~PingTask();
+
+    virtual void run();
+
+    virtual void destroy();
+};
+
+}}

task/TaskFactory.h

@@ -8,6 +8,7 @@ using namespace yazi::thread;
 
 #include "EchoTask.h"
 #include "WorkTask.h"
+#include "PingTask.h"
 using namespace yazi::task;
 
 namespace yazi {
@@ -19,6 +20,8 @@ class TaskFactory
     static Task * create(Socket * socket)
     {
         return new WorkTask(socket);
+        // return new EchoTask(socket);
+        // return new PingTask(socket);
     }
 };