一. 前言
本次主要采用thrift進(jìn)行多語(yǔ)言的調(diào)用，使用python作為服務(wù)實(shí)現(xiàn)即服務(wù)端，c++和java作為客戶(hù)端來(lái)對(duì)python程序進(jìn)行跨語(yǔ)言調(diào)用。
二. 開(kāi)發(fā)環(huán)境
Windows10
jdk11
python3.8
VS2019C++
thrift0.14.1
三. 具體過(guò)程
1.環(huán)境配置thrift下載安裝
進(jìn)入http://www.apache.org/dyn/closer.cgi?path=/thrift/0.14.1/thrift-0.14.1.exe下載thrift
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添加環(huán)境變量
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cmd調(diào)用
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2.java調(diào)用python代碼
編寫(xiě)MyData.thrift文件說(shuō)明接口情況
namespace java thrift.generated
namespace py py.thrift.generated
namespace cpp cpp.thrift.generated
typedef i16 short
typedef i32 int
typedef i64 long
typedef bool boolean
typedef string String
struct Person {
1:optional String username,
2:optional int age,
3:optional boolean married
}
exception DataException {
1:optional String message,
2:optional String callback,
3:optional String date
}
service PersonService {
Person getPersonByUsername(1:required String username) throws (1:DataException dataException),
void savePerson(1:required Person person) throws(1:DataException dataException)
boolean getImageService() throws(1:DataException dataException)
}
使用命令生成相關(guān)接口文件
thrift --gen py src/thrift/MyData.thrift
生成接口文件
拷貝py文件夾及init文件到新建的python項(xiàng)目中
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編寫(xiě)實(shí)現(xiàn)類(lèi)ServiceImpl
from py.thrift.generated import ttypes
import cv2
import matplotlib.pyplot as plt
class ServiceImpl:
def getImageService(self):
print("received picture change message")
img = cv2.imread('flower.jpg')
rows, cols = img.shape[:2]
# 第一個(gè)參數(shù)旋轉(zhuǎn)中心，第二個(gè)參數(shù)旋轉(zhuǎn)角度，第三個(gè)參數(shù)：縮放比例
M = cv2.getRotationMatrix2D((cols / 2, rows / 2), 45, 1)
# 第三個(gè)參數(shù)：變換后的圖像大小
res = cv2.warpAffine(img, M, (rows, cols))
cv2.imwrite("result.jpg", res)
return True
def getPersonByUsername(self, username):
print('Python 服務(wù)端獲取到客戶(hù)端傳來(lái)的參數(shù):' + username)
person = ttypes.Person()
person.username = username
person.age = 50
person.married = True
return person
def savePerson(self, person):
print('Python 服務(wù)端獲取客戶(hù)端的參數(shù):')
print(person.username)
print(person.age)
print(person.married)
主函數(shù)實(shí)現(xiàn)
from py.thrift.generated import PersonService
from ServiceImpl import ServiceImpl
from thrift import Thrift
from thrift.transport import TSocket
from thrift.transport import TTransport
from thrift.protocol import TCompactProtocol
from thrift.server import TServer
try:
personServiceHandler = ServiceImpl()
processor = PersonService.Processor(personServiceHandler)
serverSocket = TSocket.TServerSocket(host='127.0.0.1', port=8899)
transportFactory = TTransport.TFramedTransportFactory()
protocolFactory = TCompactProtocol.TCompactProtocolFactory()
server = TServer.TSimpleServer(processor, serverSocket, transportFactory, protocolFactory)
server.serve()
except Thrift.TException as ex:
print(ex.message)
java端同樣生成所需要的并復(fù)制過(guò)去
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編寫(xiě)java客戶(hù)端：
package com;
import org.apache.thrift.protocol.TCompactProtocol;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TSocket;
import org.apache.thrift.transport.TTransport;
import org.apache.thrift.transport.TTransportException;
import org.apache.thrift.transport.layered.TFramedTransport;
public class ThriftClient {
public static void main(String[] args) throws TTransportException {
TTransport transport = new TFramedTransport(new TSocket("localhost", 8899), 600);
TProtocol protocol = new TCompactProtocol(transport);
PersonService.Client client = new PersonService.Client(protocol);
try {
transport.open();
Person person = client.getPersonByUsername("jwy");
System.out.println(person.getUsername());
System.out.println(person.getAge());
System.out.println(person.isMarried());
System.out.println("------------------------");
Person person1 = new Person();
person1.setUsername("jwy");
person1.setAge(50);
person1.setMarried(true);
client.savePerson(person1);
Boolean isok=client.getImageService();
System.out.println("圖像變換調(diào)用:"+isok);
} catch (Exception ex) {
throw new RuntimeException(ex.getMessage(), ex);
} finally {
transport.close();
}
}
}
啟動(dòng)客戶(hù)端服務(wù)端結(jié)果:
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3.c++調(diào)用python代碼
使用VS2019安裝vcpkg及thrift
首先安裝VS英語(yǔ)語(yǔ)言庫(kù)
安裝英語(yǔ)庫(kù)
否則會(huì)報(bào)
Warning: The following VS instances are excluded because the English language pack is unavailable.
D:\Visual Studio 2019
Please install the English language pack.
No suitable Visual Studio instances were found
的錯(cuò)誤
vcpkg安裝請(qǐng)參考https://docs.microsoft.com/en-us/cpp/build/install-vcpkg?view=msvc-160&tabs=windows
安裝vcpkg完成后，進(jìn)入相關(guān)目錄，輸入命令
vcpkg install thrift:x64-windows
安裝thrift完成
安裝thrift
這次換個(gè)thrift文件hello.thrift
namespace cpp cpp.thrift.generated
namespace py py.thrift.generated
service HelloService
{
void hello(1: string name);
}
同樣使用命令
thrift --gen py src/thrift/hello.thrift
thrift --gen cpp src/thrift/hello.thrift
生成后
拷貝到對(duì)應(yīng)目錄
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編寫(xiě)client.cpp
#include "HelloService.h"
#include <thrift/protocol/TBinaryProtocol.h>
#include <thrift/protocol/TCompactProtocol.h>
#include <thrift/server/TSimpleServer.h>
#include <thrift/transport/TServerSocket.h>
#include <thrift/transport/TSocket.h>
#include <thrift/transport/TBufferTransports.h>
using namespace ::apache::thrift;
using namespace ::apache::thrift::protocol;
using namespace ::apache::thrift::transport;
using namespace ::apache::thrift::server;
using namespace ::cpp::thrift::generated;
using namespace std;
int main(int argc, char** argv)
{
shared_ptr<TTransport> socket(new TSocket("127.0.0.1", 8899));
shared_ptr<TTransport> transport(new TFramedTransport(socket));
shared_ptr<TProtocol> protocol(new TCompactProtocol(transport));
HelloServiceClient client(protocol);
try
{
transport->open();
client.hello("cpper.info");
transport->close();
}
catch (TException& tx)
{
printf("ERROR:%s\n", tx.what());
}
return 0;
}
開(kāi)啟服務(wù)端客戶(hù)端:
結(jié)果
四. 總結(jié)與討論
此次實(shí)驗(yàn)主要困難在配置thrift環(huán)境，需要注意很多細(xì)節(jié)的東西，以及網(wǎng)絡(luò)問(wèn)題
特別是VS2019配置thrift需要下載cmake,vcpkg等工具，需要耐心配置。
