You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

98 lines
3.7 KiB

package verteiltesysteme.aws;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
class TCPTimeCounterServer {
public static void main(String args[]) throws Exception {
int tcpPort = 36038;
String bucketName = "vertsys-counter";
String bucketRegion = "eu-central-1";
//String redisClusterURL = "vertsys-ec1-0001-002.71rxr9.0001.euc1.cache.amazonaws.com";
DateFormat df = new SimpleDateFormat("dd.MM.yyyy HH:mm:ss");
// Socket erzeugen
// Warnung, dass Socket nicht geschlossen wird unterdrücken ;)
@SuppressWarnings("resource")
ServerSocket serverSocket = new ServerSocket(tcpPort);
System.out.println("TCP Time Counter Server ready... waiting for packets...");
while (true) {
// Auf Anfrage vom Client warten
Socket connectionSocket = serverSocket.accept();
// Anfrage vom Client empfangen
BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
DataOutputStream outToClient = new DataOutputStream(connectionSocket.getOutputStream());
String input = null;
// Vom Client gesendete Zahl einlesen und auf aktuellen Zählerstand addieren
long number;
try {
input = inFromClient.readLine();
} catch (IOException ie) {
// TODO Auto-generated catch block
ie.printStackTrace();
}
if (input != null) {
number = new Long(input);
// Verbindung zum Redis Cluster (Amazon ElastiCache)
//JedisPool pool = new JedisPool(new JedisPoolConfig(), redisClusterURL);
//Jedis jedis = pool.getResource();
//jedis.connect();
//JedisCluster jedisCluster = new JedisCluster(new HostAndPort(redisClusterURL, 6379));
//System.out.println("Connected to redis server");
// check whether server is running or not
//System.out.println("redis server is running: " + jedis.ping());
//System.out.println("redis server cluster info: " + jedis.clusterInfo());
// Variable für Zählerstand des Servers, dieser Zähler wird durch Anfragen der
// Clients erhöht
//jedisCluster.incrBy("vertsys-counter", number);
//long counter = new Long(jedisCluster.get("vertsys-counter"));
//jedisCluster.close();
//System.out.println("TTL:" + jedisCluster.ttl("vertsys-counter"));
//Verbindung zu S3
AmazonS3 s3Client = AmazonS3ClientBuilder.defaultClient();
if (!s3Client.doesObjectExist("vertsys-counter", bucketRegion))
{
s3Client.putObject(bucketName, bucketRegion, new Long(0).toString());
}
long counter = new Long(s3Client.getObjectAsString(bucketName, bucketRegion));
counter = counter + number;
s3Client.putObject(bucketName, bucketRegion, new Long(counter).toString());
System.out.println("Request from Client " + connectionSocket.getInetAddress() + ":" + connectionSocket.getPort() + " Zahl: " + number + " Zählerstand: " + counter);
// Try/Catch hinzugefügt, nachdem bei Einsatz Amazon AWS (Healthcheck des ELB) clientSentence null war
try {
// Antwort vom Server senden
String output = (Long.toString(counter) + " Zeit: " + System.currentTimeMillis() + " "
+ df.format(new Date(System.currentTimeMillis())) + " " + InetAddress.getLocalHost());
System.out.println("Reply from Server: " + output);
// Zeilenumbruch anfügen, da Client mit readLine auf komplette Zeile wartet
outToClient.writeBytes(output + '\n');
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
connectionSocket.close();
}
}
}