具有正常关闭功能的 AsynchronousServerSocketChannel
AsynchronousServerSocketChannel with graceful shutdown
在 my previous Question 中,我询问了如何实现正确的多线程服务器。我得到了对程序 a "graceful shutdown" 的响应,并且我尝试这样做。但是,它没有用。我在客户端仍然有处于 TIME_WAIT 状态的打开套接字。
客户:
private <T extends Serializable> T sendCommand(final Command<T> command) throws ExecutionException, InterruptedException, IOException, ClassNotFoundException {
T result = null;
try (final AsynchronousSocketChannel channel = AsynchronousSocketChannel.open(channelGroup)) {
channel.setOption(StandardSocketOptions.SO_REUSEADDR, true);
channel.connect(this.mwInfo.getNextMiddleware()).get();
final OutputStream os = Channels.newOutputStream(channel);
final InputStream is = Channels.newInputStream(channel);
final ObjectOutputStream oos = new ObjectOutputStream(os);
oos.writeObject(command);
oos.flush();
channel.shutdownOutput();
final ObjectInputStream ois = new ObjectInputStream(is);
result = (T) ois.readObject();
while(ois.read() != -1){
System.out.println("busy");
}
try{
channel.shutdownInput();
}catch(Exception ex){
ex.printStackTrace();
}
oos.close();
ois.close();
}
return result;
}
服务器:
this.asyncSocket.accept(null, new CompletionHandler<AsynchronousSocketChannel, Void>() {
@Override
public void completed(final AsynchronousSocketChannel result, Void attachment) {
asyncSocket.accept(null, this);
exec.submit(new Runnable() {
@Override
public void run() {
Command cmd = null;
ObjectInputStream ois = null;
ObjectOutputStream oos = null;
try {
ois = new ObjectInputStream(Channels.newInputStream(result));
cmd = (Command) ois.readObject();
while(ois.read() != -1){
System.out.println("busy");
}
result.shutdownInput();
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
try{
oos = new ObjectOutputStream(Channels.newOutputStream(result));
oos.writeObject("test"); //do some other work here..
oos.flush();
result.shutdownOutput();
} catch (IOException e) {
e.printStackTrace();
}
try {
oos.close();
ois.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
result.close();
}catch (IOException ex){
ex.printStackTrace();
}
}
});
}
@Override
public void failed(Throwable exc, Void attachment) {
}
});
有人知道为什么这不是正常关机吗?
它看起来结构不太好,因为我在玩 try-catch 块..
提前致谢!
I still have open sockets in TIME_WAIT state on the client side.
您将始终在一侧或另一侧的 TIME_WAIT
中有套接字,并且客户端是您想要它们的地方,而不是服务器端。
状态在 2*MSL 后过期,这意味着两个最大段生命周期,这意味着两次两分钟。
这里没有问题可以解决
在 my previous Question 中,我询问了如何实现正确的多线程服务器。我得到了对程序 a "graceful shutdown" 的响应,并且我尝试这样做。但是,它没有用。我在客户端仍然有处于 TIME_WAIT 状态的打开套接字。
客户:
private <T extends Serializable> T sendCommand(final Command<T> command) throws ExecutionException, InterruptedException, IOException, ClassNotFoundException {
T result = null;
try (final AsynchronousSocketChannel channel = AsynchronousSocketChannel.open(channelGroup)) {
channel.setOption(StandardSocketOptions.SO_REUSEADDR, true);
channel.connect(this.mwInfo.getNextMiddleware()).get();
final OutputStream os = Channels.newOutputStream(channel);
final InputStream is = Channels.newInputStream(channel);
final ObjectOutputStream oos = new ObjectOutputStream(os);
oos.writeObject(command);
oos.flush();
channel.shutdownOutput();
final ObjectInputStream ois = new ObjectInputStream(is);
result = (T) ois.readObject();
while(ois.read() != -1){
System.out.println("busy");
}
try{
channel.shutdownInput();
}catch(Exception ex){
ex.printStackTrace();
}
oos.close();
ois.close();
}
return result;
}
服务器:
this.asyncSocket.accept(null, new CompletionHandler<AsynchronousSocketChannel, Void>() {
@Override
public void completed(final AsynchronousSocketChannel result, Void attachment) {
asyncSocket.accept(null, this);
exec.submit(new Runnable() {
@Override
public void run() {
Command cmd = null;
ObjectInputStream ois = null;
ObjectOutputStream oos = null;
try {
ois = new ObjectInputStream(Channels.newInputStream(result));
cmd = (Command) ois.readObject();
while(ois.read() != -1){
System.out.println("busy");
}
result.shutdownInput();
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
try{
oos = new ObjectOutputStream(Channels.newOutputStream(result));
oos.writeObject("test"); //do some other work here..
oos.flush();
result.shutdownOutput();
} catch (IOException e) {
e.printStackTrace();
}
try {
oos.close();
ois.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
result.close();
}catch (IOException ex){
ex.printStackTrace();
}
}
});
}
@Override
public void failed(Throwable exc, Void attachment) {
}
});
有人知道为什么这不是正常关机吗? 它看起来结构不太好,因为我在玩 try-catch 块..
提前致谢!
I still have open sockets in TIME_WAIT state on the client side.
您将始终在一侧或另一侧的 TIME_WAIT
中有套接字,并且客户端是您想要它们的地方,而不是服务器端。
状态在 2*MSL 后过期,这意味着两个最大段生命周期,这意味着两次两分钟。
这里没有问题可以解决