1 /* 2 * Copyright (c) 2021, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package impl; 25 26 import java.net.InetAddress; 27 import java.net.UnknownHostException; 28 import java.net.spi.InetAddressResolver; 29 import java.net.spi.InetAddressResolver.LookupPolicy; 30 import java.net.spi.InetAddressResolverProvider; 31 import java.util.ArrayList; 32 import java.util.Collections; 33 import java.util.List; 34 import java.util.logging.Logger; 35 import java.util.stream.Stream; 36 37 import testlib.ResolutionRegistry; 38 39 public class SimpleResolverProviderImpl extends InetAddressResolverProvider { 40 41 public static ResolutionRegistry registry = new ResolutionRegistry(); 42 private static List<LookupPolicy> LOOKUP_HISTORY = Collections.synchronizedList(new ArrayList<>()); 43 private static volatile long LAST_LOOKUP_TIMESTAMP; 44 private static Logger LOGGER = Logger.getLogger(SimpleResolverProviderImpl.class.getName()); 45 46 @Override 47 public InetAddressResolver get(Configuration configuration) { 48 System.out.println("The following provider will be used by current test:" + this.getClass().getCanonicalName()); 49 return new InetAddressResolver() { 50 @Override 51 public Stream<InetAddress> lookupByName(String host, LookupPolicy lookupPolicy) throws UnknownHostException { 52 LOGGER.info("Looking-up addresses for '" + host + "'. Lookup characteristics:" + 53 Integer.toString(lookupPolicy.characteristics(), 2)); 54 LOOKUP_HISTORY.add(lookupPolicy); 55 LAST_LOOKUP_TIMESTAMP = System.nanoTime(); 56 return registry.lookupHost(host, lookupPolicy); 57 } 58 59 @Override 60 public String lookupByAddress(byte[] addr) throws UnknownHostException { 61 LOGGER.info("Looking host name for the following address:" + ResolutionRegistry.addressBytesToString(addr)); 62 return registry.lookupAddress(addr); 63 } 64 }; 65 } 66 67 // Utility methods 68 public static LookupPolicy lastLookupPolicy() { 69 return lookupPolicyHistory(0); 70 } 71 72 public static long getLastLookupTimestamp() { 73 return LAST_LOOKUP_TIMESTAMP; 74 } 75 76 public static LookupPolicy lookupPolicyHistory(int position) { 77 if (LOOKUP_HISTORY.isEmpty()) { 78 throw new RuntimeException("No registered lookup policies"); 79 } 80 if (position >= LOOKUP_HISTORY.size()) { 81 throw new IllegalArgumentException("No element available with provided position"); 82 } 83 return LOOKUP_HISTORY.get(LOOKUP_HISTORY.size() - position - 1); 84 } 85 86 87 @Override 88 public String name() { 89 return "simpleInetAddressResolver"; 90 } 91 }