| /** |
| * 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.hadoop.tools.rumen; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| |
| /** |
| * {@link InputDemuxer} dem-ultiplexes the input files into individual input |
| * streams. |
| */ |
| public interface InputDemuxer extends Closeable { |
| /** |
| * Bind the {@link InputDemuxer} to a particular file. |
| * |
| * @param path |
| * The path to the file it should bind to. |
| * @param conf |
| * Configuration |
| * @throws IOException |
| * |
| * Returns true when the binding succeeds. If the file can be read |
| * but is in the wrong format, returns false. IOException is |
| * reserved for read errors. |
| */ |
| public void bindTo(Path path, Configuration conf) throws IOException; |
| |
| /** |
| * Get the next <name, input> pair. The name should preserve the original job |
| * history file or job conf file name. The input object should be closed |
| * before calling getNext() again. The old input object would be invalid after |
| * calling getNext() again. |
| * |
| * @return the next <name, input> pair. |
| */ |
| public Pair<String, InputStream> getNext() throws IOException; |
| } |