/*
* 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.util.autosparse;
import com.facebook.buck.log.Logger;
import com.facebook.buck.util.versioncontrol.HgCmdLineInterface;
import com.google.common.annotations.VisibleForTesting;
import java.lang.ref.WeakReference;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;
import javax.annotation.Nullable;
public class AbstractAutoSparseFactory {
private static final Logger LOG = Logger.get(AbstractAutoSparseFactory.class);
@VisibleForTesting
static Map<Path, WeakReference<AutoSparseState>> perSCRoot =
new HashMap<Path, WeakReference<AutoSparseState>>();
private AbstractAutoSparseFactory() {
// Not called, utility class
}
@Nullable
public static synchronized AutoSparseState getAutoSparseState(
Path projectPath, HgCmdLineInterface hgCmdLine, AutoSparseConfig autoSparseConfig)
throws InterruptedException {
Path hgRoot = hgCmdLine.getHgRoot();
if (hgRoot == null) {
LOG.info("Failed to determine a mercurial root for %s", projectPath);
return null;
}
if (perSCRoot.containsKey(hgRoot)) {
AutoSparseState entry = perSCRoot.get(hgRoot).get();
if (entry != null) {
return entry;
} else {
perSCRoot.remove(hgRoot);
}
}
HgAutoSparseState newState = new HgAutoSparseState(hgCmdLine, hgRoot, autoSparseConfig);
perSCRoot.put(hgRoot, new WeakReference<>(newState));
return newState;
}
}