hadoop DFSClientFaultInjector 源码
haddop DFSClientFaultInjector 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSClientFaultInjector.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.hdfs;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.hadoop.classification.VisibleForTesting;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
/**
* Used for injecting faults in DFSClient and DFSOutputStream tests.
* Calls into this are a no-op in production code.
*/
@VisibleForTesting
@InterfaceAudience.Private
public class DFSClientFaultInjector {
private static DFSClientFaultInjector instance = new DFSClientFaultInjector();
public static AtomicLong exceptionNum = new AtomicLong(0);
public static DFSClientFaultInjector get() {
return instance;
}
public static void set(DFSClientFaultInjector instance) {
DFSClientFaultInjector.instance = instance;
}
public boolean corruptPacket() {
return false;
}
public boolean uncorruptPacket() {
return false;
}
public boolean failPacket() {
return false;
}
public void startFetchFromDatanode() {}
public void fetchFromDatanodeException() {}
public void readFromDatanodeDelay() {}
public boolean skipRollingRestartWait() {
return false;
}
public void sleepBeforeHedgedGet() {}
public void delayWhenRenewLeaseTimeout() {}
public void onCreateBlockReader(LocatedBlock block, int chunkIndex, long offset, long length) {}
}
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