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 org.apache.gobblin.util.hadoop; import java.io.IOException; import lombok.extern.slf4j.Slf4j; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.fs.Path; import org.apache.hadoop.io.SequenceFile; /** * Override the {@link SequenceFile.Reader} mainly to * override the {@link SequenceFile.Reader {@link #getValueClassName()}} so that * we can handle the package name issue properly. */ @Slf4j public class GobblinSequenceFileReader extends SequenceFile.Reader { public GobblinSequenceFileReader(FileSystem fs, Path file, Configuration conf) throws IOException { super(fs, file, conf); } /** Returns the name of the value class. */ public String getValueClassName() { if (super.getValueClassName().startsWith("gobblin.")) { log.info("[We have] " + super.getValueClassName()); return "org.apache." + super.getValueClassName(); } return super.getValueClassName(); } }