| // Copyright 2016 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.concurrent; |
| |
| import com.google.devtools.build.lib.concurrent.ErrorClassifier.ErrorClassification; |
| |
| /** A way to inject custom handling of errors encountered by {@link AbstractQueueVisitor}. */ |
| public interface ErrorHandler { |
| |
| /** |
| * Called by {@link AbstractQueueVisitor} right after using {@link ErrorClassifier} to classify |
| * the error, but right before actually acting on the classification. |
| * |
| * <p>Note that {@link Error}s are always classified as |
| * {@link ErrorClassification#CRITICAL_AND_LOG}. |
| */ |
| void handle(Throwable t, ErrorClassification classification); |
| |
| /** An {@link ErrorHandler} that does nothing. */ |
| class NullHandler implements ErrorHandler { |
| public static final NullHandler INSTANCE = new NullHandler(); |
| |
| private NullHandler() { |
| } |
| |
| @Override |
| public void handle(Throwable t, ErrorClassification classification) { |
| } |
| } |
| } |
| |