/* * Copyright 1999-2005 The Apache Software Foundation. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package examples; import java.rmi.Remote; import java.rmi.server.UnicastRemoteObject; import java.rmi.RemoteException; import java.rmi.Naming; import java.util.Vector; import java.io.*; /** NumberCruncherClient is a simple client for factoring integers. A remote NumberCruncher is contacted and asked to factor an integer. The factors returned by the {@link NumberCruncherServer} are displayed on the screen.
See source code of
NumberCruncherClient
for more details.
Usage: java org.apache.log4j.examples.NumberCruncherClient HOST where HOST is the machine where the NumberCruncherServer is running
Note that class files for the example code is not included in
any of the distributed log4j jar files. You will have to add the
directory /dir-where-you-unpacked-log4j/classes
to
your classpath before trying out the examples.
@author Ceki Gülcü
*/
public class NumberCruncherClient {
public static void main(String[] args) {
if(args.length == 1) {
try {
String url = "rmi://"+args[0]+ "/Factor";
NumberCruncher nc = (NumberCruncher) Naming.lookup(url);
loop(nc);
}
catch(Exception e) {
e.printStackTrace();
}
}
else
usage("Wrong number of arguments.");
}
static
void usage(String msg) {
System.err.println(msg);
System.err.println(
"Usage: java org.apache.log4j.examples.NumberCruncherClient HOST\n" +
" where HOST is the machine where the NumberCruncherServer is running.");
System.exit(1);
}
static
void loop(NumberCruncher nc) {
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
int i = 0;
while (true) {
System.out.print("Enter a number to factor, '-1' to quit: ");
try {
i = Integer.parseInt(in.readLine());
}
catch(Exception e) {
e.printStackTrace();
}
if(i == -1) {
System.out.print("Exiting loop.");
return;
}
else {
try {
System.out.println("Will attempt to factor "+i);
int[] factors = nc.factor(i);
System.out.print("The factors of "+i+" are");
for(int k=0; k < factors.length; k++) {
System.out.print(" " + factors[k]);
}
System.out.println(".");
}
catch(RemoteException e) {
System.err.println("Could not factor "+i);
e.printStackTrace();
}
}
}
}
}