com.facebook.buck.rules.LocalCachingBuildEngineDelegate.java Source code

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Here is the source code for com.facebook.buck.rules.LocalCachingBuildEngineDelegate.java

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/*
 * Copyright 2016-present Facebook, Inc.
 *
 * 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.facebook.buck.rules;

import com.facebook.buck.io.ProjectFilesystem;
import com.facebook.buck.util.cache.DefaultFileHashCache;
import com.facebook.buck.util.cache.FileHashCache;
import com.facebook.buck.util.cache.StackedFileHashCache;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;

import javax.annotation.Nonnull;

/**
 */
public class LocalCachingBuildEngineDelegate implements CachingBuildEngineDelegate {
    private final FileHashCache defaultFileHashCache;

    public LocalCachingBuildEngineDelegate(FileHashCache defaultFileHashCache) {
        this.defaultFileHashCache = defaultFileHashCache;
    }

    @Override
    public LoadingCache<ProjectFilesystem, FileHashCache> createFileHashCacheLoader() {
        return CacheBuilder.newBuilder().build(new CacheLoader<ProjectFilesystem, FileHashCache>() {
            @Override
            public FileHashCache load(@Nonnull ProjectFilesystem filesystem) {
                FileHashCache cellCache = DefaultFileHashCache.createDefaultFileHashCache(filesystem);
                FileHashCache buckOutCache = DefaultFileHashCache.createBuckOutFileHashCache(
                        filesystem.replaceBlacklistedPaths(ImmutableSet.of()),
                        filesystem.getBuckPaths().getBuckOut());
                return new StackedFileHashCache(ImmutableList.of(defaultFileHashCache, cellCache, buckOutCache));
            }
        });
    }

    @Override
    public void onRuleAboutToBeBuilt(BuildRule buildRule) {
        // no-op.
    }
}