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/*
* Copyright (c) 2010-2013, Isode Limited, London, England.
* All rights reserved.
*/
/*
* Copyright (c) 2010 Remko Tronçon
* Licensed under the GNU General Public License v3.
* See Documentation/Licenses/GPLv3.txt for more information.
*/
package com.isode.stroke.network;
import java.util.ArrayList;
import java.util.Collection;
import org.xbill.DNS.Lookup;
import org.xbill.DNS.Record;
import org.xbill.DNS.SRVRecord;
import org.xbill.DNS.TextParseException;
import org.xbill.DNS.Type;
import com.isode.stroke.eventloop.Event.Callback;
import com.isode.stroke.eventloop.EventLoop;
import com.isode.stroke.network.DomainNameServiceQuery;
public class PlatformDomainNameServiceQuery extends DomainNameServiceQuery {
private final String service;
private final EventLoop eventLoop;
public PlatformDomainNameServiceQuery(final String service, final EventLoop eventLoop) {
this.service = service;
this.eventLoop = eventLoop;
}
private class QueryThread extends Thread {
@Override
public void run() {
final Collection<Result> results = new ArrayList<Result>();
Lookup request;
try {
request = new Lookup(service, Type.SRV);
final Record[] records = request.run();
if (records != null) {
for (final Record record : records) {
/* It's only anticipated that SRVRecords will be
* returned, but check first
*/
if (record instanceof SRVRecord) {
final SRVRecord srv = (SRVRecord) record;
final Result result = new Result(srv.getTarget()
.toString(), srv.getPort(), srv.getPriority(),
srv.getWeight());
results.add(result);
}
}
}
} catch (final TextParseException e) {
/* Lookup failed because "service" was not a valid DNS name;
* leave "results" empty
*/
}
eventLoop.postEvent(new Callback() {
@Override
public void run() {
onResult.emit(results);
}
});
}
}
@Override
public void run() {
final QueryThread thread = new QueryThread();
thread.setDaemon(true);
thread.start();
}
}
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