/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.camel.component.dns;
import org.apache.camel.CamelException;
import org.apache.camel.Component;
import org.apache.camel.Consumer;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.Producer;
import org.apache.camel.impl.DefaultEndpoint;
import org.apache.camel.impl.DefaultProducer;
import org.apache.camel.util.ObjectHelper;
import org.xbill.DNS.DClass;
import org.xbill.DNS.Lookup;
import org.xbill.DNS.Type;
/**
* An endpoint to manage lookup operations, using the API from dnsjava.
*/
public class DnsLookupEndpoint extends DefaultEndpoint {
public DnsLookupEndpoint(Component component) {
super("dns://lookup", component);
}
public Consumer createConsumer(Processor processor) throws Exception {
throw new UnsupportedOperationException();
}
public Producer createProducer() throws Exception {
return new DefaultProducer(this) {
public void process(Exchange exchange) throws Exception {
String dnsName = exchange.getIn().getHeader(DnsConstants.DNS_NAME, String.class);
ObjectHelper.notEmpty(dnsName, "Header " + DnsConstants.DNS_NAME);
Object type = exchange.getIn().getHeader(DnsConstants.DNS_TYPE);
Integer dnsType = null;
if (type != null) {
dnsType = Type.value(String.valueOf(type));
}
Object dclass = exchange.getIn().getHeader(DnsConstants.DNS_CLASS);
Integer dnsClass = null;
if (dclass != null) {
dnsClass = DClass.value(String.valueOf(dclass));
}
Lookup lookup = (dnsClass == null)
? (dnsType == null ? new Lookup(dnsName) : new Lookup(dnsName, dnsType))
: new Lookup(dnsName, dnsType, dnsClass);
lookup.run();
if (lookup.getAnswers() != null) {
exchange.getIn().setBody(lookup.getAnswers());
} else {
throw new CamelException(lookup.getErrorString());
}
}
};
}
public boolean isSingleton() {
return false;
}
}