| // Copyright 2020 The Bazel Authors. All rights reserved. |
| // |
| // 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.google.devtools.build.lib.remote; |
| |
| import com.google.devtools.build.lib.remote.common.CacheNotFoundException; |
| import java.io.IOException; |
| |
| /** |
| * Exception which represents a collection of IOExceptions for the purpose of distinguishing remote |
| * communication exceptions from those which occur on filesystems locally. This exception serves as |
| * a trace point for the actual transfer, so that the intended operation can be observed in a stack, |
| * with all constituent exceptions available for observation. |
| */ |
| class BulkTransferException extends IOException { |
| // true since no empty BulkTransferException is ever thrown |
| private boolean allCacheNotFoundException = true; |
| |
| BulkTransferException() {} |
| |
| BulkTransferException(IOException e) { |
| add(e); |
| } |
| |
| /** |
| * Add an IOException to the suppressed list. |
| * |
| * <p>The Java standard addSuppressed is final and this method stands in its place to selectively |
| * filter and record whether all suppressed exceptions are CacheNotFoundExceptions |
| */ |
| void add(IOException e) { |
| allCacheNotFoundException &= e instanceof CacheNotFoundException; |
| super.addSuppressed(e); |
| } |
| |
| boolean onlyCausedByCacheNotFoundException() { |
| return allCacheNotFoundException; |
| } |
| |
| static boolean isOnlyCausedByCacheNotFoundException(Exception e) { |
| return e instanceof BulkTransferException |
| && ((BulkTransferException) e).onlyCausedByCacheNotFoundException(); |
| } |
| |
| @Override |
| public String getMessage() { |
| // If there is only one suppressed exception, displaying that in the message should be helpful. |
| if (super.getSuppressed().length == 1) { |
| return super.getSuppressed()[0].getMessage(); |
| } |
| return String.format("%d errors during bulk transfer", super.getSuppressed().length); |
| } |
| } |