001/*
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 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.util;
019
020import org.apache.commons.lang3.StringUtils;
021import org.apache.hadoop.conf.Configuration;
022import org.apache.yetus.audience.InterfaceAudience;
023
024import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;
025
026/**
027 * Helper class for coprocessor host when configuration changes.
028 */
029@InterfaceAudience.Private
030public final class CoprocessorConfigurationUtil {
031
032  private CoprocessorConfigurationUtil() {
033  }
034
035  public static boolean checkConfigurationChange(Configuration oldConfig, Configuration newConfig,
036    String... configurationKey) {
037    Preconditions.checkArgument(configurationKey != null, "Configuration Key(s) must be provided");
038    boolean isConfigurationChange = false;
039    for (String key : configurationKey) {
040      String oldValue = oldConfig.get(key);
041      String newValue = newConfig.get(key);
042      // check if the coprocessor key has any difference
043      if (!StringUtils.equalsIgnoreCase(oldValue, newValue)) {
044        isConfigurationChange = true;
045        break;
046      }
047    }
048    return isConfigurationChange;
049  }
050}