com.facebook.buck.distributed.RemoteStateBasedFileHashCache.java Source code

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Here is the source code for com.facebook.buck.distributed.RemoteStateBasedFileHashCache.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.distributed;

import com.facebook.buck.distributed.thrift.BuildJobStateFileHashEntry;
import com.facebook.buck.distributed.thrift.BuildJobStateFileHashes;
import com.facebook.buck.io.ArchiveMemberPath;
import com.facebook.buck.io.ProjectFilesystem;
import com.facebook.buck.util.cache.FileHashCache;
import com.google.common.base.Function;
import com.google.common.base.Preconditions;
import com.google.common.collect.Maps;
import com.google.common.hash.HashCode;

import java.io.IOException;
import java.nio.file.Path;
import java.util.Map;

public class RemoteStateBasedFileHashCache implements FileHashCache {
    private static final Function<BuildJobStateFileHashEntry, HashCode> HASH_CODE_FROM_FILE_HASH_ENTRY = input -> HashCode
            .fromString(input.getHashCode());

    private final Map<Path, HashCode> remoteFileHashes;
    private final Map<ArchiveMemberPath, HashCode> remoteArchiveHashes;

    public RemoteStateBasedFileHashCache(final ProjectFilesystem projectFilesystem,
            BuildJobStateFileHashes remoteFileHashes) {
        this.remoteFileHashes = Maps.transformValues(
                DistBuildFileHashes.indexEntriesByPath(projectFilesystem, remoteFileHashes),
                HASH_CODE_FROM_FILE_HASH_ENTRY);
        this.remoteArchiveHashes = Maps.transformValues(
                DistBuildFileHashes.indexEntriesByArchivePath(projectFilesystem, remoteFileHashes),
                HASH_CODE_FROM_FILE_HASH_ENTRY);
    }

    @Override
    public HashCode get(Path path) throws IOException {
        return Preconditions.checkNotNull(remoteFileHashes.get(path), "Path %s not in remote file hash.", path);
    }

    @Override
    public long getSize(Path path) throws IOException {
        return 0;
    }

    @Override
    public HashCode get(ArchiveMemberPath archiveMemberPath) throws IOException {
        return Preconditions.checkNotNull(remoteArchiveHashes.get(archiveMemberPath),
                "Archive path %s not in remote file hash.", archiveMemberPath);
    }

    @Override
    public boolean willGet(Path path) {
        return remoteFileHashes.containsKey(path);
    }

    @Override
    public boolean willGet(ArchiveMemberPath archiveMemberPath) {
        return remoteArchiveHashes.containsKey(archiveMemberPath);
    }

    @Override
    public void invalidate(Path path) {
        throw new UnsupportedOperationException();
    }

    @Override
    public void invalidateAll() {
        throw new UnsupportedOperationException();
    }

    @Override
    public void set(Path path, HashCode hashCode) throws IOException {
        throw new UnsupportedOperationException();
    }
}