1 /**************************************************************** 2 * Licensed to the Apache Software Foundation (ASF) under one * 3 * or more contributor license agreements. See the NOTICE file * 4 * distributed with this work for additional information * 5 * regarding copyright ownership. The ASF licenses this file * 6 * to you under the Apache License, Version 2.0 (the * 7 * "License"); you may not use this file except in compliance * 8 * with the License. You may obtain a copy of the License at * 9 * * 10 * http://www.apache.org/licenses/LICENSE-2.0 * 11 * * 12 * Unless required by applicable law or agreed to in writing, * 13 * software distributed under the License is distributed on an * 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * 15 * KIND, either express or implied. See the License for the * 16 * specific language governing permissions and limitations * 17 * under the License. * 18 ****************************************************************/ 19 20 package org.apache.james.jspf.core; 21 22 import org.apache.james.jspf.core.exceptions.TimeoutException; 23 24 import java.util.List; 25 26 /** 27 * Interface which should be used to access all necassary DNS-Records 28 * 29 */ 30 public interface DNSService { 31 32 /** 33 * Retrieve dns records for the given host 34 * 35 * @param request the dns request 36 * @return an array of Strings representing the records 37 * @throws TimeoutException 38 */ 39 public List getRecords(DNSRequest request) throws TimeoutException; 40 41 /** 42 * Try to get all domain names for the running host 43 * 44 * @return names A List contains all domain names which could resolved 45 */ 46 public List getLocalDomainNames(); 47 48 /** 49 * Set the timeout for DNS-Requests 50 * 51 * @param timeOut The timeout in seconds 52 */ 53 public void setTimeOut(int timeOut); 54 55 /** 56 * @return the current record limit 57 */ 58 public int getRecordLimit(); 59 60 /** 61 * Sets a new limit for the number of records for MX and PTR lookups. 62 * 63 * @param recordLimit the new limit (0 => unlimited) 64 */ 65 public void setRecordLimit(int recordLimit); 66 67 }