Using a file packaged into a UDF jar?

[Jonathan Coveney]

I am trying to implement a maxmind call where I do not have to put the
maxmind file on the nodes.

I referred to this
http://web.archiveorange.com/archive/v/3inw3FVtG19NUTr25Yra
<http://web.archiveorange.com/archive/v/3inw3FVtG19NUTr25Yra>and tried to
mesh it with the method in this
http://blog.data-miners.com/2009/12/hadoop-and-mapreduce-what-country-is-ip.html

<http://blog.data-miners.com/2009/12/hadoop-and-mapreduce-what-country-is-ip.html>This
is my jar's manifest:

META-INF/
META-INF/MANIFEST.MF
maxmind/
maxmind/com/
maxmind/com/maxmind/
maxmind/com/maxmind/geoip/
maxmind/com/maxmind/geoip/Country.class
maxmind/com/maxmind/geoip/DatabaseInfo.class
maxmind/com/maxmind/geoip/Location.class
maxmind/com/maxmind/geoip/LookupService.class
maxmind/com/maxmind/geoip/Region.class
maxmind/com/maxmind/geoip/regionName.class
maxmind/com/maxmind/geoip/timeZone.class
maxmind/ip2country.class
GeoIp.dat

So, as you can see, the file is there. However, it isn't working when I try
to instantiate it. The UDF is attached below. I see the
path, jar:file:/home/jcoveney/udfs/maxmind/jar/maxmind.jar!/GeoIp.dat, so I
think I'm almost there. The question is: what form does this path need to be
in so that the pig execution wil lbe able to get to the GeoIp.dat? I tried
without the full path, I tried without jar:, I tried without file:...I
really just don't know.

Any ideas?

package maxmind;

import java.io.IOException;

import org.apache.pig.EvalFunc;
import org.apache.pig.PigException;
import org.apache.pig.data.Tuple;
import org.apache.pig.backend.executionengine.ExecException;
import org.apache.pig.impl.util.WrappedIOException;

import maxmind.com.maxmind.geoip.*;

public class ip2country extends EvalFunc<String> {
        public LookupService iplookupservice;
        public static String DEFAULT_LOCATION = "/GeoIp.dat";

        public ip2country() throws IOException {
                this(DEFAULT_LOCATION);
        }

        public ip2country(String GeoIpFile) throws IOException {
                if (iplookupservice == null) {
                        String filename =
getClass().getResource(DEFAULT_LOCATION).toExternalForm();
                        System.out.println(filename);
                        iplookupservice = new LookupService(filename,
LookupService.GEOIP_MEMORY_CACHE | LookupService.GEOIP_CHECK_CACHE);
                }
        }

        @Override
        public String exec(Tuple input) throws IOException {
                if (input == null || input.size() == 0)
                        return null;
                try {
                        return "hi";
                } catch (Exception e) {
                        int errCode = 31415;
                        String msg = "Error while performing maxmind lookup
in " + this.getClass().getSimpleName();
                        throw new ExecException(msg, errCode,
PigException.BUG, e);
                }
        }
}
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