Java tutorial
/** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.twitter.distributedlog.util; import com.twitter.distributedlog.DistributedLogConfiguration; import com.twitter.distributedlog.config.ConcurrentConstConfiguration; import com.twitter.distributedlog.config.DynamicDistributedLogConfiguration; import org.apache.commons.configuration.Configuration; import java.util.Iterator; public class ConfUtils { /** * Load configurations with prefixed <i>section</i> from source configuration <i>srcConf</i> into * target configuration <i>targetConf</i>. * * @param targetConf * Target Configuration * @param srcConf * Source Configuration * @param section * Section Key */ public static void loadConfiguration(Configuration targetConf, Configuration srcConf, String section) { Iterator confKeys = srcConf.getKeys(); while (confKeys.hasNext()) { Object keyObject = confKeys.next(); if (!(keyObject instanceof String)) { continue; } String key = (String) keyObject; if (key.startsWith(section)) { targetConf.setProperty(key.substring(section.length()), srcConf.getProperty(key)); } } } /** * Create const dynamic configuration based on distributedlog configuration. * * @param conf * static distributedlog configuration. * @return dynamic configuration */ public static DynamicDistributedLogConfiguration getConstDynConf(DistributedLogConfiguration conf) { ConcurrentConstConfiguration constConf = new ConcurrentConstConfiguration(conf); return new DynamicDistributedLogConfiguration(constConf); } }