| /** |
| * 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.server.datanode; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| |
| /** |
| * Used for injecting faults in DFSClient and DFSOutputStream tests. |
| * Calls into this are a no-op in production code. |
| */ |
| @VisibleForTesting |
| @InterfaceAudience.Private |
| public class DataNodeFaultInjector { |
| private static DataNodeFaultInjector instance = new DataNodeFaultInjector(); |
| |
| public static DataNodeFaultInjector get() { |
| return instance; |
| } |
| |
| public static void set(DataNodeFaultInjector injector) { |
| instance = injector; |
| } |
| |
| public void getHdfsBlocksMetadata() {} |
| |
| public void writeBlockAfterFlush() throws IOException {} |
| |
| public void sendShortCircuitShmResponse() throws IOException {} |
| |
| public boolean dropHeartbeatPacket() { |
| return false; |
| } |
| |
| public void stopSendingPacketDownstream(final String mirrAddr) |
| throws IOException { |
| } |
| |
| /** |
| * Used as a hook to intercept the latency of sending packet. |
| */ |
| public void logDelaySendingPacketDownstream( |
| final String mirrAddr, |
| final long delayMs) throws IOException { |
| } |
| |
| public void delaySendingAckToUpstream(final String upstreamAddr) |
| throws IOException { |
| } |
| |
| /** |
| * Used as a hook to intercept the latency of sending ack. |
| */ |
| public void logDelaySendingAckToUpstream( |
| final String upstreamAddr, |
| final long delayMs) |
| throws IOException { |
| } |
| |
| public void noRegistration() throws IOException { } |
| |
| public void failMirrorConnection() throws IOException { } |
| |
| public void failPipeline(ReplicaInPipelineInterface replicaInfo, |
| String mirrorAddr) throws IOException { } |
| |
| public void startOfferService() throws Exception {} |
| |
| public void endOfferService() throws Exception {} |
| |
| public void throwTooManyOpenFiles() throws FileNotFoundException { |
| } |
| } |