[cpp worker] support cluster mode and object Put/Get works (#9682)

cpp/src/example/example.cc

@@ -33,7 +33,7 @@ int main() {
 
   /// put and get object
   auto obj = Ray::Put(123);
-  auto getRsult = obj.Get();
+  auto get_result = obj.Get();
 
   /// general function remote call（args passed by value）
   auto r0 = Ray::Task(Return1).Remote();

cpp/src/example/example_cluster_mode.cc

@@ -0,0 +1,27 @@
+
+/// This is a complete example of writing a distributed program using the C ++ worker API.
+
+/// including the header
+#include <ray/api.h>
+#include <ray/api/ray_config.h>
+#include <ray/util/logging.h>
+
+/// using namespace
+using namespace ray::api;
+
+int main(int argc, char **argv) {
+  RAY_LOG(INFO) << "Start cpp worker example";
+
+  /// initialization to cluster mode
+  ray::api::RayConfig::GetInstance()->run_mode = RunMode::CLUSTER;
+  /// Set redis ip to connect an existing ray cluster.
+  /// ray::api::RayConfig::GetInstance()->redis_ip = "127.0.0.1";
+  Ray::Init();
+
+  /// put and get object
+  auto obj = Ray::Put(123);
+  auto get_result = *(obj.Get());
+
+  RAY_LOG(INFO) << "Get result: " << get_result;
+  Ray::Shutdown();
+}