hadoop ManifestCommitterFactory 源码
haddop ManifestCommitterFactory 代码
文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/committer/manifest/ManifestCommitterFactory.java
/*
* 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.mapreduce.lib.output.committer.manifest;
import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathIOException;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.lib.output.PathOutputCommitterFactory;
import static org.apache.hadoop.mapreduce.lib.output.committer.manifest.impl.InternalConstants.UNSUPPORTED_FS_SCHEMAS;
/**
* This is the committer factory to register as the source of committers
* for the job/filesystem schema.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class ManifestCommitterFactory extends PathOutputCommitterFactory {
/**
* Name of this factory.
*/
public static final String NAME = ManifestCommitterFactory.class.getName();
@Override
public ManifestCommitter createOutputCommitter(final Path outputPath,
final TaskAttemptContext context) throws IOException {
// safety check. S3A does not support this, so fail fast.
final String scheme = outputPath.toUri().getScheme();
if (UNSUPPORTED_FS_SCHEMAS.contains(scheme)) {
throw new PathIOException(outputPath.toString(),
"This committer does not work with the filesystem of type " + scheme);
}
return new ManifestCommitter(outputPath, context);
}
}
相关信息
相关文章
hadoop ManifestCommitterConfig 源码
hadoop ManifestCommitterConstants 源码
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