Testing the full IPv4 range with GeoIPCity.dat

Test.java

import com.maxmind.geoip.*;
import java.io.IOException;
import java.util.concurrent.*;

class Test {
  public static void main(String[] args) throws IOException {
    if (args.length == 0 || args[0] == "all") {
      checkAll();
    } else {
      checkSome(args);
    }
  }

  private static void checkAll() {
    ForkJoinPool pool = new ForkJoinPool();
    pool.invoke(new CheckTask(0, (long) Math.pow(2, 32)));
  }

  private static void checkSome(String[] ips) throws IOException {
    LookupService lookup = new LookupService("GeoIP-133_20140304/GeoIPCity.dat", LookupService.GEOIP_INDEX_CACHE);
    for (String ip : ips) {
      try {
        lookup.getLocation(ip);
        System.err.printf("%s: ok\n", ip);
      } catch (RuntimeException re) {
        System.err.printf("%s failed: %s (%s)\n", ip, re.getMessage(), re.getClass().getName());
      }
    }
  }

  static class CheckTask extends RecursiveAction {
    private long start;
    private long end;

    public CheckTask(long start, long end) {
      this.start = start;
      this.end = end;
    }

    protected void compute() {
      long range = end - start;
      if (range <= 256) {
        int i0 = (int) (start >> 24) & 0xff;
        int i1 = (int) (start >> 16) & 0xff;
        int i2 = (int) (start >>  8) & 0xff;
        int i3 = (int) (start >>  0) & 0xff;
        System.err.printf("%d.%d.%d.%d\n", i0, i1, i2, i3);
        try {
          LookupService lookup = new LookupService("GeoIP-133_20140304/GeoIPCity.dat", LookupService.GEOIP_INDEX_CACHE);
          for (long i = start; i < end; i++) {
            try {
              lookup.getLocation(i);
            } catch (RuntimeException re) {
              System.err.printf("%x failed: %s\n", i, re.getMessage());
            }
          }
          lookup.close();
        } catch (IOException ioe) {
          System.err.println("Could not open database");
        }
      } else {
        invokeAll(new CheckTask(start, start + range/2), new CheckTask(start + range/2, end));
      }
    }
  }
}