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Rrom C＃，通过SOCKET读/写到JAVA并产生一些并发/套接字问题。C＃通过读写SOCKET到JAVA并发生一些并发/套接字问题
我想实现一个服务器客户端应用程序，其中服务器是Java和客户端是C＃。他们通过TCP/IP进行通信并在它们之间交换一些二进制数据。
特别是我有一个在Java和C＃中定义的数据包类。它有一个标题，键和值。 Java和C＃都以完全相同的方式写入和读取数据包到套接字。通过这种方式，我可以从C＃发送请求数据包，在Java服务器上处理它并将响应作为数据包发回。
原来的问题是更复杂的方式，但我可以把它煮到这个“简单”的版本。
我已经实现了服务器和客户端，如下所述。代码也可在底部找到。
对我说出你不得不继续阅读:)
服务器（Java）的侧
在服务器端的问题，我有一个很虚的ServerSocket使用。它读取传入的数据包并发回与响应几乎相同的数据包。
客户端（C＃）端 客户端有点复杂。客户端启动N（可配置）线程数（我将称它们为用户线程）。一个在线程和一个在线程。所有用户线程都使用虚拟请求数据包和唯一ID创建一个Call对象。然后将该呼叫添加到本地BlockingCollection中。
的输出线程连续读取本地BlockingCollection和服务器也连续发送所有请求数据包到服务器
将在线程读取响应数据包，并将其匹配到呼叫对象（还记得唯一的呼叫ID）。
如果在5秒的时间间隔内没有响应特定的Call对象，用户线程将通过打印到控制台来投诉它。
还有一个定时器，间隔10秒，打印每秒执行多少事务。
如果您到达目前为止，谢谢:)。
现在的问题：
下面的代码，这是一个什么样上述我在Mac上使用Mono正常工作的落实。在Windows上，它也不会立即以较低的用户线程数（< 10）失败。随着我突然增加线程数量，客户端收到的响应数据包以某种方式被破坏。在这个应用程序方面，所有用户线程都被阻塞，因为他们的请求的答案没有收到。 问题是为什么他们被损坏？正如你看到的touche socket的线程是In和Out线程。但不知何故，用户线程的数量会影响客户端并使其刹车。
它看起来像一些并发或套接字问题，但我可以找到它。
我已经把服务器（Java）和客户端（C＃）的代码。他们没有任何依赖关系，只是编译和运行两个主要方法（第一台服务器）显示问题。
我很欣赏你读到目前为止。
服务器代码
import java.io.*;
import java.net.*;
import java.nio.ByteBuffer;
public class DummyServer {
public static void main(String[] args) throws IOException {
ServerSocket server = new ServerSocket(9900);
System.out.println("Server started");
for(;;){
final Socket socket = server.accept();
System.out.println("Accepting a connection");
new Thread(new Runnable(){
public void run() {
try {
System.out.println("Thread started to handle the connection");
DataInputStream dis = new DataInputStream(socket.getInputStream());
DataOutputStream dos = new DataOutputStream(socket.getOutputStream());
for(int i=0; ; i++){
Packet packet = new Packet();
packet.readFrom(dis);
packet.key = null;
packet.value = new byte[1000];
packet.writeTo(dos);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
}
public static class Packet {
byte[] key;
byte[] value;
long callId = -1;
private int valueHash = -1;
public void writeTo(DataOutputStream outputStream) throws IOException {
final ByteBuffer writeHeaderBuffer = ByteBuffer.allocate(1 << 10); // 1k
writeHeaderBuffer.clear();
writeHeaderBuffer.position(12);
writeHeaderBuffer.putLong(callId);
writeHeaderBuffer.putInt(valueHash);
int size = writeHeaderBuffer.position();
int headerSize = size - 12;
writeHeaderBuffer.position(0);
writeHeaderBuffer.putInt(headerSize);
writeHeaderBuffer.putInt((key == null) ? 0 : key.length);
writeHeaderBuffer.putInt((value == null) ? 0 : value.length);
outputStream.write(writeHeaderBuffer.array(), 0, size);
if (key != null)outputStream.write(key);
if (value != null)outputStream.write(value);
}
public void readFrom(DataInputStream dis) throws IOException {
final ByteBuffer readHeaderBuffer = ByteBuffer.allocate(1 << 10);
final int headerSize = dis.readInt();
int keySize = dis.readInt();
int valueSize = dis.readInt();
readHeaderBuffer.clear();
readHeaderBuffer.limit(headerSize);
dis.readFully(readHeaderBuffer.array(), 0, headerSize);
this.callId = readHeaderBuffer.getLong();
valueHash = readHeaderBuffer.getInt();
key = new byte[keySize];
dis.readFully(key);
value = new byte[valueSize];
dis.readFully(value);
}
}
}
C＃的客户端代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Sockets;
using System.Net;
using System.IO;
using System.Collections.Concurrent;
using System.Threading;
namespace Client
{
public class Program
{
readonly ConcurrentDictionary<long, Call> calls = new ConcurrentDictionary<long, Call>();
readonly BlockingCollection<Call> outThreadQueue = new BlockingCollection<Call>(1000);
readonly TcpClient tcpClient = new TcpClient("localhost", 9900);
readonly private int THREAD_COUNT;
static int ops;
public static void Main(string[] args) {
new Program(args.Length > 0 ? int.Parse(args[0]) : 100).Start();
}
public Program(int threadCount) {
this.THREAD_COUNT = threadCount;
new Thread(new ThreadStart(this.InThreadRun)).Start();//start the InThread
new Thread(new ThreadStart(this.OutThreadRun)).Start();//start the OutThread
}
public void Start(){
for (int i = 0; i < THREAD_COUNT; i++)
new Thread(new ThreadStart(this.Call)).Start();
Console.WriteLine(THREAD_COUNT + " User Threads started to perform server call");
System.Timers.Timer aTimer = new System.Timers.Timer(10000);
aTimer.Elapsed += new System.Timers.ElapsedEventHandler(this.Stats);
aTimer.Enabled = true;
}
public void Stats(object source, System.Timers.ElapsedEventArgs e){
Console.WriteLine("Ops per second: " + Interlocked.Exchange(ref ops, 0)/10);
}
public void Call() {
for (; ;){
Call call = new Call(new Packet());
call.request.key = new byte[10];
call.request.value = new byte[1000];
outThreadQueue.Add(call);
Packet result = null;
for (int i = 1;result==null ; i++){
result = call.getResult(5000);
if(result==null) Console.WriteLine("Call" + call.id + " didn't get answer within "+ 5000*i/1000 + " seconds");
}
Interlocked.Increment(ref ops);
}
}
public void InThreadRun(){
for (; ;){
Packet packet = new Packet();
packet.Read(tcpClient.GetStream());
Call call;
if (calls.TryGetValue(packet.callId, out call))
call.inbQ.Add(packet);
else
Console.WriteLine("Unkown call result: " + packet.callId);
}
}
public void OutThreadRun() {
for (; ;){
Call call = outThreadQueue.Take();
calls.TryAdd(call.id, call);
Packet packet = call.request;
if (packet != null) packet.write(tcpClient.GetStream());
}
}
}
public class Call
{
readonly public long id;
readonly public Packet request;
static long callIdGen = 0;
readonly public BlockingCollection<Packet> inbQ = new BlockingCollection<Packet>(1);
public Call(Packet request)
{
this.id = incrementCallId();
this.request = request;
this.request.callId = id;
}
public Packet getResult(int timeout)
{
Packet response = null;
inbQ.TryTake(out response, timeout);
return response;
}
private static long incrementCallId()
{
long initialValue, computedValue;
do
{
initialValue = callIdGen;
computedValue = initialValue + 1;
} while (initialValue != Interlocked.CompareExchange(ref callIdGen, computedValue, initialValue));
return computedValue;
}
}
public class Packet
{
public byte[] key;
public byte[] value;
public long callId = 0;
public void write(Stream stream)
{
MemoryStream header = new MemoryStream();
using (BinaryWriter writer = new BinaryWriter(header))
{
writer.Write(System.Net.IPAddress.HostToNetworkOrder((long)callId));
writer.Write(System.Net.IPAddress.HostToNetworkOrder((int)-1));
}
byte[] headerInBytes = header.ToArray();
MemoryStream body = new MemoryStream();
using (BinaryWriter writer = new BinaryWriter(body))
{
writer.Write(System.Net.IPAddress.HostToNetworkOrder(headerInBytes.Length));
writer.Write(System.Net.IPAddress.HostToNetworkOrder(key == null ? 0 : key.Length));
writer.Write(System.Net.IPAddress.HostToNetworkOrder(value == null ? 0 : value.Length));
writer.Write(headerInBytes);
if (key != null) writer.Write(key);
if (value != null) writer.Write(value);
byte[] packetInBytes = body.ToArray();
stream.Write(packetInBytes, 0, packetInBytes.Length);
}
}
public void Read(Stream stream)
{
BinaryReader reader = new BinaryReader(stream);
int headerSize = IPAddress.NetworkToHostOrder(reader.ReadInt32());
int keySize = IPAddress.NetworkToHostOrder(reader.ReadInt32());
int valueSize = IPAddress.NetworkToHostOrder(reader.ReadInt32());
this.callId = IPAddress.NetworkToHostOrder(reader.ReadInt64());
int valuePartitionHash = IPAddress.NetworkToHostOrder(reader.ReadInt32());
this.key = new byte[keySize];
this.value = new byte[valueSize];
if (keySize > 0) reader.Read(this.key, 0, keySize);
if (valueSize > 0) reader.Read(this.value, 0, valueSize);
}
}
}
你是对的，我改变了Read（）方法到我从Java DataInputStream中作弊的readFully方法，它工作。非常感谢。高度赞赏！ – 2012-02-15 23:45:32