com.facebook.buck.parser.cache.impl.FakeManifestService.java Source code

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Here is the source code for com.facebook.buck.parser.cache.impl.FakeManifestService.java

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/*
 * Copyright 2018-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.parser.cache.impl;

import com.facebook.buck.artifact_cache.thrift.Manifest;
import com.facebook.buck.manifestservice.ManifestService;
import com.google.common.collect.ImmutableList;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/** A fake manifest service to be used in tests without going over a wire. */
public class FakeManifestService implements ManifestService {
    private final Map<String, ArrayList<ByteBuffer>> fingerprints = new HashMap<>();

    /** Appends one more entry to the manifest. Creates a new one if it does not already exist. */
    @Override
    public ListenableFuture<Void> appendToManifest(Manifest manifest) {
        return addToManifestBackingCollection(manifest);
    }

    /** Fetch the current value of the Manifest. An empty list is returned if no value is present. */
    @Override
    public ListenableFuture<Manifest> fetchManifest(String manifestKey) {
        Manifest manifest = new Manifest();
        manifest.setKey(manifestKey);

        List<ByteBuffer> storedValues = fingerprints.get(manifestKey);
        if (storedValues == null) {
            storedValues = ImmutableList.of();
        }
        manifest.setValues(storedValues);
        return Futures.immediateFuture(manifest);
    }

    /** Deletes an existing Manifest. */
    @Override
    public ListenableFuture<Void> deleteManifest(String manifestKey) {
        fingerprints.remove(manifestKey);
        return Futures.immediateFuture(null);
    }

    /** Sets the Manifest for key. Overwrites existing one if it already exists. */
    @Override
    public ListenableFuture<Void> setManifest(Manifest manifest) {
        return addToManifestBackingCollection(manifest);
    }

    private ListenableFuture<Void> addToManifestBackingCollection(Manifest manifest) {
        String key = manifest.key;
        ArrayList<ByteBuffer> fingerprintsForKey = fingerprints.get(key);
        if (fingerprintsForKey == null) {
            fingerprintsForKey = new ArrayList<>();
            fingerprints.put(key, fingerprintsForKey);
        }

        for (ByteBuffer bytes : manifest.values) {
            fingerprintsForKey.add(bytes);
        }

        return Futures.immediateFuture(null);
    }

    @Override
    public void close() throws IOException {
    }
}