/**
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.hdfs.server.datanode;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeSpi;
import javax.annotation.Nullable;
/**
* Injects faults in the metadata and data related operations on datanode
* volumes.
*/
@InterfaceAudience.Private
public class FaultInjectorFileIoEvents {
private final boolean isEnabled;
public FaultInjectorFileIoEvents(@Nullable Configuration conf) {
if (conf != null) {
isEnabled = conf.getBoolean(DFSConfigKeys
.DFS_DATANODE_ENABLE_FILEIO_FAULT_INJECTION_KEY, DFSConfigKeys
.DFS_DATANODE_ENABLE_FILEIO_FAULT_INJECTION_DEFAULT);
} else {
isEnabled = false;
}
}
public void beforeMetadataOp(
@Nullable FsVolumeSpi volume, FileIoProvider.OPERATION op) {
}
public void beforeFileIo(
@Nullable FsVolumeSpi volume, FileIoProvider.OPERATION op, long len) {
}
}