hbase-common/src/main/java/org/apache/hadoop/hbase/trace/HBaseHTraceConfiguration.java

   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, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18
  19 package org.apache.hadoop.hbase.trace;
  20
  21 import org.apache.hadoop.conf.Configuration;
  22 import org.apache.htrace.core.HTraceConfiguration;
  23 import org.apache.yetus.audience.InterfaceAudience;
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26
  27 @InterfaceAudience.Private
  28 public class HBaseHTraceConfiguration extends HTraceConfiguration {
  29   private static final Logger LOG = LoggerFactory.getLogger(HBaseHTraceConfiguration.class);
  30
  31   public static final String KEY_PREFIX = "hbase.htrace.";
  32
  33   private Configuration conf;
  34
  35   private void handleDeprecation(String key) {
  36     String oldKey = "hbase." + key;
  37     String newKey = KEY_PREFIX + key;
  38     String oldValue = conf.get(oldKey);
  39     if (oldValue != null) {
  40       LOG.warn("Warning: using deprecated configuration key " + oldKey +
  41           ".  Please use " + newKey + " instead.");
  42       String newValue = conf.get(newKey);
  43       if (newValue == null) {
  44         conf.set(newKey, oldValue);
  45       } else {
  46         LOG.warn("Conflicting values for " + newKey + " and " + oldKey +
  47             ".  Using " + newValue);
  48       }
  49     }
  50   }
  51
  52   public HBaseHTraceConfiguration(Configuration conf) {
  53     this.conf = conf;
  54     handleDeprecation("local-file-span-receiver.path");
  55     handleDeprecation("local-file-span-receiver.capacity");
  56     handleDeprecation("sampler.frequency");
  57     handleDeprecation("sampler.fraction");
  58     handleDeprecation("zipkin.collector-hostname");
  59     handleDeprecation("zipkin.collector-port");
  60     handleDeprecation("zipkin.num-threads");
  61     handleDeprecation("zipkin.traced-service-hostname");
  62     handleDeprecation("zipkin.traced-service-port");
  63   }
  64
  65   @Override
  66   public String get(String key) {
  67     return conf.get(KEY_PREFIX + key);
  68   }
  69
  70   @Override
  71   public String get(String key, String defaultValue) {
  72     return conf.get(KEY_PREFIX + key,defaultValue);
  73
  74   }
  75
  76   @Override
  77   public boolean getBoolean(String key, boolean defaultValue) {
  78     return conf.getBoolean(KEY_PREFIX + key, defaultValue);
  79   }
  80 }