thrift之Hello--python client & cpp sever

最新推荐文章于 2024-08-12 09:03:28 发布

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本文介绍Thrift软件框架，并通过一个hello world示例详细展示了如何编写Thrift文件及使用其代码生成工具来创建跨语言的RPC服务。具体包括Thrift文件定义、C++服务器端与Python客户端的实现步骤。

Thrift是一个开发跨语言服务的软件框架。编写thrift文件，通过自带的代码生成引擎即可生成各种语言(C++，Java，Python，PHP，Ruby，Erlang，C#等)的对应代码，下面以最经典的hello为例讲述，如何通过thrift编写跨语言的RPC程序：
1编写thrift文件，保存为hello.thrift：

service Hello { void Hello() }

2生成cpp和py框架文件
在hello.thrift文件所在目录执行：
thrift -r --gen cpp hello.thrift
thrift -r --gen py hello.thrift
会在当前目录下面产生两个文件夹，分别为gen-cpp和gen-py，

3编写cpp服务器端代码，拷贝gen-cpp目录中的Hello_server.skeleton.cpp到当前目录，重命名为CppServer.cpp，修改如下：
#include "Hello.h" #include <protocol/TBinaryProtocol.h> #include <server/TSimpleServer.h> #include <transport/TServerSocket.h> #include <transport/TBufferTransports.h> using namespace ::apache::thrift; using namespace ::apache::thrift::protocol; using namespace ::apache::thrift::transport; using namespace ::apache::thrift::server; using boost::shared_ptr; class HelloHandler : virtual public HelloIf { public: HelloHandler() { // Your initialization goes here } void Hello() { // Your implementation goes here printf("Hello,Thrift/n"); } }; int main(int argc, char **argv) { int port = 9090; shared_ptr<HelloHandler> handler(new HelloHandler()); shared_ptr<TProcessor> processor(new HelloProcessor(handler)); shared_ptr<TServerTransport> serverTransport(new TServerSocket(port)); shared_ptr<TTransportFactory> transportFactory(new TBufferedTransportFactory()); shared_ptr<TProtocolFactory> protocolFactory(new TBinaryProtocolFactory()); TSimpleServer server(processor, serverTransport, transportFactory, protocolFactory); server.serve(); return 0; }

4编写python客户端代码，PythonClient.py如下：

#!/usr/bin/env python import sys sys.path.append('./gen-py') from hello import Hello from hello.ttypes import * from thrift import Thrift from thrift.transport import TSocket from thrift.transport import TTransport from thrift.protocol import TBinaryProtocol # Make socket transport = TSocket.TSocket('localhost', 9090) # Buffering is critical. Raw sockets are very slow transport = TTransport.TBufferedTransport(transport) # Wrap in a protocol protocol = TBinaryProtocol.TBinaryProtocol(transport) # Create a client to use the protocol encoder client = Hello.Client(protocol) # Connect! transport.open() # Call Server services client.Hello()

5编写cpp端Makefile如下：
BOOST_DIR = /usr/local/include/boost/ THRIFT_DIR = /usr/local/include/thrift LIB_DIR = /usr/local/lib GEN_SRC = ./gen-cpp/hello_types.cpp ./gen-cpp/Hello.cpp default: server server: CppServer.cpp g++ -o CppServer -I${THRIFT_DIR} -I${BOOST_DIR} -I./gen-cpp -L${LIB_DIR} -lthrift CppServer.cpp ${GEN_SRC} clean: $(RM) -r CppServer

6编译cpp端，直接make即可生成相应的可执行文件，python端可以直接运行。

至此一个最简单的跨语言PRC程序即完成了，很简单吧。