Showing the changes to java/pkg/sun/net/dns/ResolverConfiguration.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,122 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.net.dns; | ||
| 27 | |||
| 28 | import java.util.List; | ||
| 29 | |||
| 30 | /** | ||
| 31 | * The configuration of the client resolver. | ||
| 32 | * | ||
| 33 | * <p>A ResolverConfiguration is a singleton that represents the | ||
| 34 | * configuration of the client resolver. The ResolverConfiguration | ||
| 35 | * is opened by invoking the {@link #open() open} method. | ||
| 36 | * | ||
| 37 | * @since 1.4 | ||
| 38 | */ | ||
| 39 | |||
| 40 | public abstract class ResolverConfiguration { | ||
| 41 | |||
| 42 | private static final Object lock = new Object(); | ||
| 43 | |||
| 44 | private static ResolverConfiguration provider; | ||
| 45 | |||
| 46 | protected ResolverConfiguration() { } | ||
| 47 | |||
| 48 | /** | ||
| 49 | * Opens the resolver configuration. | ||
| 50 | * | ||
| 51 | * @return the resolver configuration | ||
| 52 | */ | ||
| 53 | public static ResolverConfiguration open() { | ||
| 54 | synchronized (lock) { | ||
| 55 | if (provider == null) { | ||
| 56 | provider = new sun.net.dns.ResolverConfigurationImpl(); | ||
| 57 | } | ||
| 58 | return provider; | ||
| 59 | } | ||
| 60 | } | ||
| 61 | |||
| 62 | /** | ||
| 63 | * Returns a list corresponding to the domain search path. The | ||
| 64 | * list is ordered by the search order used for host name lookup. | ||
| 65 | * Each element in the list returns a {@link java.lang.String} | ||
| 66 | * containing a domain name or suffix. | ||
| 67 | * | ||
| 68 | * @return list of domain names | ||
| 69 | */ | ||
| 70 | public abstract List<String> searchlist(); | ||
| 71 | |||
| 72 | /** | ||
| 73 | * Returns a list of name servers used for host name lookup. | ||
| 74 | * Each element in the list returns a {@link java.lang.String} | ||
| 75 | * containing the textual representation of the IP address of | ||
| 76 | * the name server. | ||
| 77 | * | ||
| 78 | * @return list of the name servers | ||
| 79 | */ | ||
| 80 | public abstract List<String> nameservers(); | ||
| 81 | |||
| 82 | |||
| 83 | /** | ||
| 84 | * Options representing certain resolver variables of | ||
| 85 | * a {@link ResolverConfiguration}. | ||
| 86 | */ | ||
| 87 | public static abstract class Options { | ||
| 88 | |||
| 89 | /** | ||
| 90 | * Returns the maximum number of attempts the resolver | ||
| 91 | * will connect to each name server before giving up | ||
| 92 | * and returning an error. | ||
| 93 | * | ||
| 94 | * @return the resolver attempts value or -1 is unknown | ||
| 95 | */ | ||
| 96 | public int attempts() { | ||
| 97 | return -1; | ||
| 98 | } | ||
| 99 | |||
| 100 | /** | ||
| 101 | * Returns the basic retransmit timeout, in milliseconds, | ||
| 102 | * used by the resolver. The resolver will typically use | ||
| 103 | * an exponential backoff algorithm where the timeout is | ||
| 104 | * doubled for every retransmit attempt. The basic | ||
| 105 | * retransmit timeout, returned here, is the initial | ||
| 106 | * timeout for the exponential backoff algorithm. | ||
| 107 | * | ||
| 108 | * @return the basic retransmit timeout value or -1 | ||
| 109 | * if unknown | ||
| 110 | */ | ||
| 111 | public int retrans() { | ||
| 112 | return -1; | ||
| 113 | } | ||
| 114 | } | ||
| 115 | |||
| 116 | /** | ||
| 117 | * Returns the {@link #Options} for the resolver. | ||
| 118 | * | ||
| 119 | * @return options for the resolver | ||
| 120 | */ | ||
| 121 | public abstract Options options(); | ||
| 122 | } | ||