| /** |
| * 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.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.xbill.DNS.DClass; |
| import org.xbill.DNS.Message; |
| import org.xbill.DNS.Name; |
| import org.xbill.DNS.Record; |
| import org.xbill.DNS.Section; |
| import org.xbill.DNS.SimpleResolver; |
| import org.xbill.DNS.Type; |
| |
| /** |
| * an endpoint to make queries against wikipedia using |
| * the short TXT query. |
| * <p/> |
| * See here for a reference: |
| * http://www.commandlinefu.com/commands/view/2829/query-wikipedia-via-console-over-dns |
| * <p/> |
| * This endpoint accepts the following header: |
| * term: a simple term to use to query wikipedia. |
| */ |
| public class WikipediaEndpoint extends DefaultEndpoint { |
| |
| public WikipediaEndpoint(Component component) { |
| super("dns:///wikipedia", 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 { |
| SimpleResolver resolver = new SimpleResolver(); |
| int type = Type.TXT; |
| Name name = Name.fromString(String.valueOf(exchange.getIn().getHeader(DnsConstants.TERM)) + ".wp.dg.cx", Name.root); |
| Record rec = Record.newRecord(name, type, DClass.IN); |
| Message query = Message.newQuery(rec); |
| Message response = resolver.send(query); |
| Record[] records = response.getSectionArray(Section.ANSWER); |
| if (records.length > 0) { |
| exchange.getIn().setBody(records[0].rdataToString()); |
| } else { |
| exchange.getIn().setBody(null); |
| } |
| } |
| }; |
| } |
| |
| public boolean isSingleton() { |
| return false; |
| } |
| } |