| /** |
| * 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.avro.tool; |
| |
| import com.google.common.collect.ImmutableList; |
| import joptsimple.OptionParser; |
| import joptsimple.OptionSet; |
| import org.apache.avro.file.DataFileStream; |
| import org.apache.avro.generic.GenericDatumReader; |
| import org.apache.hadoop.fs.Path; |
| |
| import java.io.InputStream; |
| import java.io.PrintStream; |
| import java.util.List; |
| |
| /** Counts the records in avro files or folders */ |
| public class RecordCountTool implements Tool { |
| |
| @Override |
| public String getName() { |
| return "count"; |
| } |
| |
| @Override |
| public String getShortDescription() { |
| return "Counts the records in avro files or folders"; |
| } |
| |
| @Override |
| public int run(InputStream stdin, PrintStream out, PrintStream err, List<String> args) throws Exception { |
| OptionParser optionParser = new OptionParser(); |
| OptionSet optionSet = optionParser.parse(args.toArray(new String[0])); |
| List<String> nargs = (List<String>) optionSet.nonOptionArguments(); |
| |
| if (nargs.isEmpty()) { |
| printHelp(err); |
| err.println(); |
| optionParser.printHelpOn(err); |
| return 0; |
| } |
| |
| long count = 0L; |
| if (ImmutableList.of("-").equals(nargs)) { |
| count = countRecords(stdin); |
| } else { |
| for (Path file : Util.getFiles(nargs)) { |
| try (final InputStream inStream = Util.openFromFS(file)) { |
| count += countRecords(inStream); |
| } |
| } |
| } |
| out.println(count); |
| out.flush(); |
| return 0; |
| } |
| |
| private long countRecords(InputStream inStream) throws java.io.IOException { |
| long count = 0L; |
| try (DataFileStream<Object> streamReader = new DataFileStream<>(inStream, new GenericDatumReader<>())) { |
| while (streamReader.hasNext()) { |
| count = count + streamReader.getBlockCount(); |
| streamReader.nextBlock(); |
| } |
| } |
| return count; |
| } |
| |
| private void printHelp(PrintStream ps) { |
| ps.println(getName() + " [input-files...]"); |
| ps.println(); |
| ps.println(getShortDescription()); |
| ps.println("A dash ('-') can be given as an input-file to use stdin"); |
| } |
| } |