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1   /*
2    * Copyright 2017 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package io.netty.resolver.dns;
17  
18  import io.netty.handler.codec.dns.DnsQuestion;
19  import io.netty.util.internal.logging.InternalLogLevel;
20  import io.netty.util.internal.logging.InternalLogger;
21  import io.netty.util.internal.logging.InternalLoggerFactory;
22  
23  import static io.netty.util.internal.ObjectUtil.checkNotNull;
24  
25  final class TraceDnsQueryLifeCycleObserverFactory implements DnsQueryLifecycleObserverFactory {
26      private static final InternalLogger DEFAULT_LOGGER =
27              InternalLoggerFactory.getInstance(TraceDnsQueryLifeCycleObserverFactory.class);
28      private static final InternalLogLevel DEFAULT_LEVEL = InternalLogLevel.DEBUG;
29      private final InternalLogger logger;
30      private final InternalLogLevel level;
31  
32      TraceDnsQueryLifeCycleObserverFactory() {
33          this(DEFAULT_LOGGER, DEFAULT_LEVEL);
34      }
35  
36      TraceDnsQueryLifeCycleObserverFactory(InternalLogger logger, InternalLogLevel level) {
37          this.logger = checkNotNull(logger, "logger");
38          this.level = checkNotNull(level, "level");
39      }
40  
41      @Override
42      public DnsQueryLifecycleObserver newDnsQueryLifecycleObserver(DnsQuestion question) {
43          return new TraceDnsQueryLifecycleObserver(question, logger, level);
44      }
45  }