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44 lines
1.7 KiB
44 lines
1.7 KiB
/* Angelehnt an Kurose/Ross Computernetzwerke (bis 5e Java, ab 6e Python) */
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package verteiltesysteme.socket.reuse;
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import java.io.*;
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import java.net.*;
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class TCPServerReuse {
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public static void main(String argv[]) throws Exception {
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int tcpPort = 36037;
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String clientSentence;
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String capitalizedSentence;
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// Server-Socket erzeugen
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@SuppressWarnings("resource")
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ServerSocket welcomeSocket = new ServerSocket();
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// erlaubt das Wiederverwenden von Sockets, die für die individuellen Clients genutzt werden, auch wenn der Port nocht im Status "TIME_WAIT" ist
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welcomeSocket.setReuseAddress(true);
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welcomeSocket.bind(new InetSocketAddress(tcpPort));
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System.out.println("TCP Server started. Waiting for incoming requests... (reuseAddress="+welcomeSocket.getReuseAddress()+", timeout="+welcomeSocket.getSoTimeout() +", buffersize="+welcomeSocket.getReceiveBufferSize()+")");
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while (true) {
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Socket connectionSocket = welcomeSocket.accept();
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System.out.println("Received request from client " + connectionSocket.getInetAddress() + ":" + connectionSocket.getPort() + " generating response...");
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BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
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DataOutputStream outToClient = new DataOutputStream(connectionSocket.getOutputStream());
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// Try/Catch hinzugefügt, nachdem bei Einsatz Amazon AWS (Healthcheck des ELB) clientSentence null war
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try {
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clientSentence = inFromClient.readLine();
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if (clientSentence != null) {
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capitalizedSentence = clientSentence.toUpperCase() + '\n';
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outToClient.writeBytes(capitalizedSentence);
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}
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} catch (IOException ioe) {
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ioe.printStackTrace();
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}
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connectionSocket.close();
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}
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}
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}
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