| // Copyright (C) 2020 The Android Open Source Project |
| // |
| // Licensed 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 com.googlesource.gerrit.plugins.replication; |
| |
| import java.io.IOException; |
| import java.util.Locale; |
| |
| /** Some NFS utilities */ |
| public class Nfs { |
| /** |
| * Determine if a throwable or a cause in its causal chain is a Stale NFS File Handle |
| * |
| * @param throwable |
| * @return a boolean true if the throwable or a cause in its causal chain is a Stale NFS File |
| * Handle |
| */ |
| public static boolean isStaleFileHandleInCausalChain(Throwable throwable) { |
| while (throwable != null) { |
| if (throwable instanceof IOException && isStaleFileHandle((IOException) throwable)) { |
| return true; |
| } |
| throwable = throwable.getCause(); |
| } |
| return false; |
| } |
| |
| /** |
| * Determine if an IOException is a Stale NFS File Handle |
| * |
| * @param ioe |
| * @return a boolean true if the IOException is a Stale NFS FIle Handle |
| */ |
| public static boolean isStaleFileHandle(IOException ioe) { |
| String msg = ioe.getMessage(); |
| return msg != null && msg.toLowerCase(Locale.ROOT).matches(".*stale .*file .*handle.*"); |
| } |
| |
| public static <T extends Throwable> void throwIfNotStaleFileHandle(T e) throws T { |
| if (!isStaleFileHandleInCausalChain(e)) { |
| throw e; |
| } |
| } |
| } |