使用thrift实现了Java服务器和nodejs客户端之间的跨平台通信

07-19 20:43:49   来源:csdn   评论: 点击:

thrift是一个软件框架,用来进行可扩展且跨语言的服务的开发。它结合了功能强大的软件堆栈和 代码生成 引擎,以构建在 C++, Java, Python, PHP, Ruby, Erlang, Perl, Haskell, C , Cocoa, JavaScript, Node js, Smalltal

1. 简单介绍

 

thrift是一个软件框架,用来进行可扩展且跨语言的服务的开发。它结合了功能强大的软件堆栈和 代码生成 引擎,以构建在 C++, Java, Python, PHP, Ruby, Erlang, Perl, Haskell, C#, Cocoa, JavaScript, Node.js, Smalltalk, and OCaml 这些编程语言间无缝结合的、高效的服务。   

2. 下载与安装

Thrift目前最高0.9.2,地址: http://archive.apache.org/dist/thrift/

注意,我们要把exe和tar文件都下载下来,exe用来编译你的thrift中间语言,而tar解压后,我们可以看到csharp,php,java,js等多种开发语言的实例代码,对我们很有帮助的, 下载最新版 ,其中包含lib文件库,包含各种语言需要的类库;

下载之后,我们把exe文件可放在C盘,建个Thrift目录,把它放入,然后可以配置一下环境变量;将thrift的文件夹路径添加到path变量中;

3. 编写thrift文件

首先编写:tutorial.thrift

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

# Thrift Tutorial
# Mark Slee (mcslee@facebook.com)
#
# This file aims to teach you how to use Thrift, in a .thrift file. Neato. The
# first thing to notice is that .thrift files support standard shell comments.
# This lets you make your thrift file executable and include your Thrift build
# step on the top line. And you can place comments like this anywhere you like.
#
# Before running this file, you will need to have installed the thrift compiler
# into /usr/local/bin.

/**
 * The first thing to know about are types. The available types in Thrift are:
 *
 *  bool        Boolean, one byte
 *  byte        Signed byte
 *  i16         Signed 16-bit integer
 *  i32         Signed 32-bit integer
 *  i64         Signed 64-bit integer
 *  double      64-bit floating point value
 *  string      String
 *  binary      Blob (byte array)
 *  map<t1,t2>  Map from one type to another
 *  list<t1>    Ordered list of one type
 *  set<t1>     Set of unique elements of one type
 *
 * Did you also notice that Thrift supports C style comments?
 */

// Just in case you were wondering... yes. We support simple C comments too.

/**
 * Thrift files can reference other Thrift files to include common struct
 * and service definitions. These are found using the current path, or by
 * searching relative to any paths specified with the -I compiler flag.
 *
 * Included objects are accessed using the name of the .thrift file as a
 * prefix. i.e. shared.SharedObject
 */
include "shared.thrift"

/**
 * Thrift files can namespace, package, or prefix their output in various
 * target languages.
 */
namespace cpp tutorial
namespace d tutorial
namespace java tutorial
namespace php tutorial
namespace perl tutorial
namespace haxe tutorial

/**
 * Thrift lets you do typedefs to get pretty names for your types. Standard
 * C style here.
 */
typedef i32 MyInteger

/**
 * Thrift also lets you define constants for use across languages. Complex
 * types and structs are specified using JSON notation.
 */
const i32 INT32CONSTANT = 9853
const map<string,string> MAPCONSTANT = {'hello':'world', 'goodnight':'moon'}

/**
 * You can define enums, which are just 32 bit integers. Values are optional
 * and start at 1 if not supplied, C style again.
 */
enum Operation {
  ADD = 1,
  SUBTRACT = 2,
  MULTIPLY = 3,
  DIVIDE = 4
}

/**
 * Structs are the basic complex data structures. They are comprised of fields
 * which each have an integer identifier, a type, a symbolic name, and an
 * optional default value.
 *
 * Fields can be declared "optional", which ensures they will not be included
 * in the serialized output if they aren't set.  Note that this requires some
 * manual management in some languages.
 */
struct Work {
  1: i32 num1 = 0,
  2: i32 num2,
  3: Operation op,
  4: optional string comment,
}

/**
 * Structs can also be exceptions, if they are nasty.
 */
exception InvalidOperation {
  1: i32 whatOp,
  2: string why
}

/**
 * Ahh, now onto the cool part, defining a service. Services just need a name
 * and can optionally inherit from another service using the extends keyword.
 */
service Calculator extends shared.SharedService {

  /**
   * A method definition looks like C code. It has a return type, arguments,
   * and optionally a list of exceptions that it may throw. Note that argument
   * lists and exception lists are specified using the exact same syntax as
   * field lists in struct or exception definitions.
   */

   void ping(),

   i32 add(1:i32 num1, 2:i32 num2),

   i32 calculate(1:i32 logid, 2:Work w) throws (1:InvalidOperation ouch),

   /**
    * This method has a oneway modifier. That means the client only makes
    * a request and does not listen for any response at all. Oneway methods
    * must be void.
    */
   oneway void zip()

}

/**
 * That just about covers the basics. Take a look in the test/ folder for more
 * detailed examples. After you run this file, your generated code shows up
 * in folders with names gen-<language>. The generated code isn't too scary
 * to look at. It even has pretty indentation.
 */

附上

shared.thrift

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/**
 * This Thrift file can be included by other Thrift files that want to share
 * these definitions.
 */

namespace cpp shared
namespace d share // "shared" would collide with the eponymous D keyword.
namespace java shared
namespace perl shared
namespace php shared
namespace haxe shared

struct SharedStruct {
  1: i32 key
  2: string value
}

service SharedService {
  SharedStruct getStruct(1: i32 key)
}

2、输入编译命令,将接口文件编译对应的语言java、nodejs;

>thrift -r --gen java tutorial.thrift                                     

>thrift -r --gen js:node tutorial.thrift                                 

3、可以在当前目录下看到对应生成的文件夹gen-java、gen-nodejs;

4. 创建Java语言的服务器

1、在eclipse新建MavenProject名为thrift

2、创建CalculatorHandler.java和JavaServer.java文件。代码如下:

CalculatorHandler.java
package tutorial.impl;

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE
 * file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */

import java.util.HashMap;

import shared.SharedStruct;
// Generated code
import tutorial.Calculator;
import tutorial.InvalidOperation;
import tutorial.Work;

public class CalculatorHandler implements Calculator.Iface {

  private HashMap<Integer, SharedStruct> log;

  public CalculatorHandler() {
    log = new HashMap<Integer, SharedStruct>();
  }

  public void ping() {
    System.out.println("ping()");
  }

  public int add(int n1, int n2) {
    System.out.println("add(" + n1 + "," + n2 + ")");
    return n1 + n2;
  }

  public int calculate(int logid, Work work) throws InvalidOperation {
    System.out.println("calculate(" + logid + ", {" + work.op + "," + work.num1 + "," + work.num2 + "})");
    int val = 0;
    switch (work.op) {
    case ADD:
      val = work.num1 + work.num2;
      break;
    case SUBTRACT:
      val = work.num1 - work.num2;
      break;
    case MULTIPLY:
      val = work.num1 * work.num2;
      break;
    case DIVIDE:
      if (work.num2 == 0) {
        InvalidOperation io = new InvalidOperation();
        io.whatOp = work.op.getValue();
        io.why = "Cannot divide by 0";
        throw io;
      }
      val = work.num1 / work.num2;
      break;
    default:
      InvalidOperation io = new InvalidOperation();
      io.whatOp = work.op.getValue();
      io.why = "Unknown operation";
      throw io;
    }

    SharedStruct entry = new SharedStruct();
    entry.key = logid;
    entry.value = Integer.toString(val);
    log.put(logid, entry);

    return val;
  }

  public SharedStruct getStruct(int key) {
    System.out.println("getStruct(" + key + ")");
    return log.get(key);
  }

  public void zip() {
    System.out.println("zip()");
  }

}

3.JavaServer文件代码

package Server;

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE
 * file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */

import org.apache.thrift.server.TServer;
import org.apache.thrift.server.TServer.Args;
import org.apache.thrift.server.TSimpleServer;
import org.apache.thrift.transport.TSSLTransportFactory;
import org.apache.thrift.transport.TSSLTransportFactory.TSSLTransportParameters;
import org.apache.thrift.transport.TServerSocket;
import org.apache.thrift.transport.TServerTransport;

// Generated code
import tutorial.Calculator;
import tutorial.impl.CalculatorHandler;

public class JavaServer {

  public static CalculatorHandler handler;

  public static Calculator.Processor processor;

  public static void main(String[] args) {
    try {
      handler = new CalculatorHandler();
      processor = new Calculator.Processor(handler);

      Runnable simple = new Runnable() {
        public void run() {
          simple(processor);
        }
      };
      Runnable secure = new Runnable() {
        public void run() {
          secure(processor);
        }
      };

      new Thread(simple).start();
      new Thread(secure).start();
    } catch (Exception x) {
      x.printStackTrace();
    }
  }

  public static void simple(Calculator.Processor processor) {
    try {
      TServerTransport serverTransport = new TServerSocket(9090);
      TServer server = new TSimpleServer(new Args(serverTransport).processor(processor));

      // Use this for a multithreaded server
      // TServer server = new TThreadPoolServer(new TThreadPoolServer.Args(serverTransport).processor(processor));

      System.out.println("Starting the simple server...");
      server.serve();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public static void secure(Calculator.Processor processor) {
    try {
      /*
       * Use TSSLTransportParameters to setup the required SSL parameters. In this example we are setting the keystore
       * and the keystore password. Other things like algorithms, cipher suites, client auth etc can be set.
       */
      TSSLTransportParameters params = new TSSLTransportParameters();
      // The Keystore contains the private key
      params.setKeyStore("c:/.mykeystore", "jinking", null, null);

      /*
       * Use any of the TSSLTransportFactory to get a server transport with the appropriate SSL configuration. You can
       * use the default settings if properties are set in the command line. Ex: -Djavax.net.ssl.keyStore=.keystore and
       * -Djavax.net.ssl.keyStorePassword=thrift
       * 
       * Note: You need not explicitly call open(). The underlying server socket is bound on return from the factory
       * class.
       */
      TServerTransport serverTransport = TSSLTransportFactory.getServerSocket(9091, 0, null, params);
      TServer server = new TSimpleServer(new Args(serverTransport).processor(processor));

      // Use this for a multi threaded server
      // TServer server = new TThreadPoolServer(new TThreadPoolServer.Args(serverTransport).processor(processor));

      System.out.println("Starting the secure server...");
      server.serve();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

4、配置需要的lib类库,编辑pom.xml文件,必备的类库有libthrift和slf4j-api

<dependency>
      <groupId>org.apache.thrift</groupId>
      <artifactId>libthrift</artifactId>
      <version>0.9.2</version>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.6.1</version>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>log4j-over-slf4j</artifactId>
      <version>1.6.1</version>
    </dependency>

5、用java目录下的keytool生成证书;

>keytool -certreq -keyalg RSA -alias myalias -file certreq.txt -keystore c:\.mykeystore

代码相应的修改成你生成的秘钥,红色字体标出;

params.setKeyStore("c:/.mykeystore", <span style="color:#ff0000;">"jinking"</span>, null, null);

6、运行javaServer.java文件,可以看到如下界面;

5. 创建nodejs版的客户端

1、首先就是要搭建nodejs环境和npm和express、安装对应模块;这个可以去网上搜索一下;不在此叙述;

可能会报错:Error: Cannot find module 'thrift'  和 Error: Cannot find module 'node-int64' 、Error: Cannot find module 'q'

则需要输入下面的目录安装对应的模块:

npm install -g node-int64  和  npm install -g thrift 、  npm install -g q

2、新建工程目录client;

3、讲lib下的nodejs类库和gen-nodejs,拷贝到根目录下,路径如下:

4、创建NodeClient.js文件

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

var thrift = require('./thrift');
var ThriftTransports = require('./thrift/transport');
var ThriftProtocols = require('./thrift/protocol');
var Calculator = require('./gen-nodejs/Calculator');
var ttypes = require('./gen-nodejs/tutorial_types');


transport = ThriftTransports.TBufferedTransport()
protocol = ThriftProtocols.TBinaryProtocol()

var connection = thrift.createConnection("localhost", 9090, {
  transport : transport,
  protocol : protocol
});

connection.on('error', function(err) {
  assert(false, err);
});

// Create a Calculator client with the connection
var client = thrift.createClient(Calculator, connection);


client.ping(function(err, response) {
  console.log('ping()');
});


client.add(1,1, function(err, response) {
  console.log("1+1=" + response);
});


work = new ttypes.Work();
work.op = ttypes.Operation.DIVIDE;
work.num1 = 1;
work.num2 = 0;

client.calculate(1, work, function(err, message) {
  if (err) {
    console.log("InvalidOperation " + err);
  } else {
    console.log('Whoa? You know how to divide by zero?');
  }
});

work.op = ttypes.Operation.SUBTRACT;
work.num1 = 15;
work.num2 = 10;

client.calculate(1, work, function(err, message) {
  console.log('15-10=' + message);

  client.getStruct(1, function(err, message){
    console.log('Check log: ' + message.value);

    //close the connection once we're done
    connection.end();
  });
});

5、输入: >node NodeClient.js

6、nodejs客户端命令行窗口显示:

7、Java服务器端显示:

8、大功告成。

使用thrift框架实现了Java和nodejs之间的跨平台通信;


相关热词搜索:java nodejs 平台通信

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