| // 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.actions; |
| |
| import java.io.IOException; |
| |
| /** Prefetches files to local disk. */ |
| public interface ActionInputPrefetcher { |
| public static final ActionInputPrefetcher NONE = |
| new ActionInputPrefetcher() { |
| @Override |
| public void prefetchFiles( |
| Iterable<? extends ActionInput> inputs, MetadataProvider metadataProvider) { |
| // Do nothing. |
| } |
| }; |
| |
| /** |
| * Initiates best-effort prefetching of all given inputs. This should not block. |
| * |
| * <p>For any path not under this prefetcher's control, the call should be a no-op. |
| */ |
| void prefetchFiles(Iterable<? extends ActionInput> inputs, MetadataProvider metadataProvider) |
| throws IOException, InterruptedException; |
| } |