Java readByte() blocks the application

Question

the following loop seems to block the whole server application, if the client has suddenly disconnected and EOF exception is raised:

String a = "";
int amount = 1;
while(((cr = streamIn.readByte()) != EOF))
{
 if(amount < 100)
 {
  a+=(char)cr;
  amount++;
 }
 else
  break;
}

According to the function description: readByte(): receive a byte. the method will block, until data is available.

The question is, how can i make it timeout so it only blocks for a few seconds at most?

Answer 1

你有没有尝试过设置Socket.setSoTimeout（）

Answer 2

What server is that ? I mean it blocks the thread that serves the client that suddenly drops...it should still serve the other clients

Answer 3

Look into using inputStream.available() which returns the number of bytes which can be retrieved without blocking.

(Untested) Example:

String a = "";
int amount = 1;
int available = 0;
while(true){
    int available = streamIn.available();
    if(available <= 0){
        continue;
    }   
    byte cr = streamIn.readByte();
    if(cr == EOF){
        break;
    }
    if(amount < 100){
        a+=(char)cr;
        amount++;
    }else{
        break;
    }
}