| /** |
| * 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) { |
| } |
| } |