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002 * Licensed to the Apache Software Foundation (ASF) under one *
003 * or more contributor license agreements. See the NOTICE file *
004 * distributed with this work for additional information *
005 * regarding copyright ownership. The ASF licenses this file *
006 * to you under the Apache License, Version 2.0 (the *
007 * "License"); you may not use this file except in compliance *
008 * with the License. You may obtain a copy of the License at *
009 * *
010 * http://www.apache.org/licenses/LICENSE-2.0 *
011 * *
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015 * KIND, either express or implied. See the License for the *
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019
020 package org.apache.james.jspf.core;
021
022 import org.apache.james.jspf.core.exceptions.TimeoutException;
023
024 import java.util.List;
025
026 /**
027 * Interface which should be used to access all necassary DNS-Records
028 *
029 */
030 public interface DNSService {
031
032 /**
033 * Retrieve dns records for the given host
034 *
035 * @param request the dns request
036 * @return an array of Strings representing the records
037 * @throws TimeoutException
038 */
039 public List<String> getRecords(DNSRequest request) throws TimeoutException;
040
041 /**
042 * Try to get all domain names for the running host
043 *
044 * @return names A List contains all domain names which could resolved
045 */
046 public List<String> getLocalDomainNames();
047
048 /**
049 * Set the timeout for DNS-Requests
050 *
051 * @param timeOut The timeout in seconds
052 */
053 public void setTimeOut(int timeOut);
054
055 /**
056 * @return the current record limit
057 */
058 public int getRecordLimit();
059
060 /**
061 * Sets a new limit for the number of records for MX and PTR lookups.
062 *
063 * @param recordLimit the new limit (0 => unlimited)
064 */
065 public void setRecordLimit(int recordLimit);
066
067 }