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Rrom C＃，通過SOCKET讀/寫到JAVA併產生一些併發/套接字問題。C＃通過讀寫SOCKET到JAVA併發生一些併發/套接字問題
我想實現一個服務器客戶端應用程序，其中服務器是Java和客戶端是C＃。他們通過TCP/IP進行通信並在它們之間交換一些二進制數據。
特別是我有一個在Java和C＃中定義的數據包類。它有一個標題，鍵和值。 Java和C＃都以完全相同的方式寫入和讀取數據包到套接字。通過這種方式，我可以從C＃發送請求數據包，在Java服務器上處理它並將響應作爲數據包發回。
原來的問題是更復雜的方式，但我可以把它煮到這個「簡單」的版本。
我已經實現了服務器和客戶端，如下所述。代碼也可在底部找到。
對我說出你不得不繼續閱讀:)
服務器（Java）的側
在服務器端的問題，我有一個很虛的ServerSocket使用。它讀取傳入的數據包併發回與響應幾乎相同的數據包。
客戶端（C＃）端 客戶端有點複雜。客戶端啓動N（可配置）線程數（我將稱它們爲用戶線程）。一個在線程和一個在線程。所有用戶線程都使用虛擬請求數據包和唯一ID創建一個Call對象。然後將該呼叫添加到本地BlockingCollection中。
的輸出線程連續讀取本地BlockingCollection和服務器也連續發送所有請求數據包到服務器
將在線程讀取響應數據包，並將其匹配到呼叫對象（還記得唯一的呼叫ID）。
如果在5秒的時間間隔內沒有響應特定的Call對象，用戶線程將通過打印到控制檯來投訴它。
還有一個定時器，間隔10秒，打印每秒執行多少事務。
如果您到達目前爲止，謝謝:)。
現在的問題：
下面的代碼，這是一個什麼樣上述我在Mac上使用Mono正常工作的落實。在Windows上，它也不會立即以較低的用戶線程數（< 10）失敗。隨着我突然增加線程數量，客戶端收到的響應數據包以某種方式被破壞。在這個應用程序方面，所有用戶線程都被阻塞，因爲他們的請求的答案沒有收到。 問題是爲什麼他們被損壞？正如你看到的touche socket的線程是In和Out線程。但不知何故，用戶線程的數量會影響客戶端並使其剎車。
它看起來像一些併發或套接字問題，但我可以找到它。
我已經把服務器（Java）和客戶端（C＃）的代碼。他們沒有任何依賴關係，只是編譯和運行兩個主要方法（第一臺服務器）顯示問題。
我很欣賞你讀到目前爲止。
服務器代碼
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＃的客戶端代碼：
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);
}
}
}
你是對的，我改變了Read（）方法到我從Java DataInputStream中作弊的readFully方法，它工作。非常感謝。高度讚賞！ – 2012-02-15 23:45:32