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/**
* Copyright 2013 Florian Schmaus
*
* All rights reserved. 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 org.jivesoftware.smack.util.dns;
/**
* @see <a href="http://tools.ietf.org/html/rfc2782>RFC 2782: A DNS RR for specifying the location of services (DNS
* SRV)<a>
* @author Florian Schmaus
*
*/
public class SRVRecord extends HostAddress implements Comparable<SRVRecord> {
private int weight;
private int priority;
/**
* Create a new SRVRecord
*
* @param fqdn Fully qualified domain name
* @param port The connection port
* @param priority Priority of the target host
* @param weight Relative weight for records with same priority
* @throws IllegalArgumentException fqdn is null or any other field is not in valid range (0-65535).
*/
public SRVRecord(String fqdn, int port, int priority, int weight) {
super(fqdn, port);
if (weight < 0 || weight > 65535)
throw new IllegalArgumentException(
"DNS SRV records weight must be a 16-bit unsiged integer (i.e. between 0-65535. Weight was: "
+ weight);
if (priority < 0 || priority > 65535)
throw new IllegalArgumentException(
"DNS SRV records priority must be a 16-bit unsiged integer (i.e. between 0-65535. Priority was: "
+ priority);
this.priority = priority;
this.weight = weight;
}
public int getPriority() {
return priority;
}
public int getWeight() {
return weight;
}
public int compareTo(SRVRecord other) {
// According to RFC2782,
// "[a] client MUST attempt to contact the target host with the lowest-numbered priority it can reach".
// This means that a SRV record with a higher priority is 'less' then one with a lower.
int res = other.priority - this.priority;
if (res == 0) {
res = this.weight - other.weight;
}
return res;
}
@Override
public String toString() {
return super.toString() + " prio:" + priority + ":w:" + weight;
}
}
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