hadoop S3AOpContext 源码
haddop S3AOpContext 代码
文件路径：/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AOpContext.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.fs.s3a;
import javax.annotation.Nullable;
import org.apache.hadoop.util.Preconditions;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.s3a.impl.ActiveOperationContext;
import org.apache.hadoop.fs.s3a.statistics.S3AStatisticsContext;
/**
* Class for operation context struct passed through codepaths for main
* S3AFileSystem operations.
* Anything op-specific should be moved to a subclass of this.
*
* This was originally a base class, but {@link ActiveOperationContext} was
* created to be more minimal and cover many more operation type.
*/
@SuppressWarnings("visibilitymodifier")
public class S3AOpContext extends ActiveOperationContext {
final Invoker invoker;
@Nullable final FileSystem.Statistics stats;
/** FileStatus for "destination" path being operated on. */
protected final FileStatus dstFileStatus;
/**
* Constructor.
* @param invoker invoker, which contains retry policy
* @param stats optional stats object
* @param instrumentation instrumentation to use
* @param dstFileStatus file status from existence check
*/
public S3AOpContext(Invoker invoker,
@Nullable FileSystem.Statistics stats,
S3AStatisticsContext instrumentation,
FileStatus dstFileStatus) {
super(newOperationId(),
instrumentation
);
Preconditions.checkNotNull(invoker, "Null invoker arg");
Preconditions.checkNotNull(instrumentation, "Null instrumentation arg");
Preconditions.checkNotNull(dstFileStatus, "Null dstFileStatus arg");
this.invoker = invoker;
this.stats = stats;
this.dstFileStatus = dstFileStatus;
}
public Invoker getInvoker() {
return invoker;
}
@Nullable
public FileSystem.Statistics getStats() {
return stats;
}
public FileStatus getDstFileStatus() {
return dstFileStatus;
}
}
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