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// Copyright (C) 2009 The Android Open Source Project
//
// 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.gerrit.server.patch;
import com.google.gerrit.reviewdb.AccountDiffPreference.Whitespace;
import com.google.gerrit.reviewdb.Change;
import com.google.gerrit.reviewdb.PatchSet;
import com.google.gerrit.reviewdb.Project;
import com.google.gerrit.server.cache.Cache;
import com.google.gerrit.server.cache.CacheModule;
import com.google.gerrit.server.cache.EvictionPolicy;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.inject.Inject;
import com.google.inject.Module;
import com.google.inject.Singleton;
import com.google.inject.TypeLiteral;
import com.google.inject.name.Named;
import org.eclipse.jgit.diff.Edit;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.ObjectId;
import java.util.List;
/** Provides a cached list of {@link PatchListEntry}. */
@Singleton
public class PatchListCacheImpl implements PatchListCache {
private static final String FILE_NAME = "diff";
private static final String INTRA_NAME = "diff_intraline";
public static Module module() {
return new CacheModule() {
@Override
protected void configure() {
final TypeLiteral<Cache<PatchListKey, PatchList>> fileType =
new TypeLiteral<Cache<PatchListKey, PatchList>>() {};
disk(fileType, FILE_NAME) //
.memoryLimit(128) // very large items, cache only a few
.evictionPolicy(EvictionPolicy.LRU) // prefer most recent
.populateWith(PatchListLoader.class) //
;
final TypeLiteral<Cache<IntraLineDiffKey, IntraLineDiff>> intraType =
new TypeLiteral<Cache<IntraLineDiffKey, IntraLineDiff>>() {};
disk(intraType, INTRA_NAME) //
.memoryLimit(128) // very large items, cache only a few
.evictionPolicy(EvictionPolicy.LRU) // prefer most recent
.populateWith(IntraLineLoader.class) //
;
bind(PatchListCacheImpl.class);
bind(PatchListCache.class).to(PatchListCacheImpl.class);
}
};
}
private final Cache<PatchListKey, PatchList> fileCache;
private final Cache<IntraLineDiffKey, IntraLineDiff> intraCache;
private final boolean computeIntraline;
@Inject
PatchListCacheImpl(
@Named(FILE_NAME) final Cache<PatchListKey, PatchList> fileCache,
@Named(INTRA_NAME) final Cache<IntraLineDiffKey, IntraLineDiff> intraCache,
@GerritServerConfig Config cfg) {
this.fileCache = fileCache;
this.intraCache = intraCache;
this.computeIntraline =
cfg.getBoolean("cache", INTRA_NAME, "enabled",
cfg.getBoolean("cache", "diff", "intraline", true));
}
public PatchList get(final PatchListKey key) {
return fileCache.get(key);
}
public PatchList get(final Change change, final PatchSet patchSet) {
final Project.NameKey projectKey = change.getProject();
final ObjectId a = null;
final ObjectId b = ObjectId.fromString(patchSet.getRevision().get());
final Whitespace ws = Whitespace.IGNORE_NONE;
return get(new PatchListKey(projectKey, a, b, ws));
}
@Override
public IntraLineDiff getIntraLineDiff(ObjectId aId, Text aText, ObjectId bId,
Text bText, List<Edit> edits) {
if (computeIntraline) {
IntraLineDiffKey key =
new IntraLineDiffKey(aId, aText, bId, bText, edits);
return intraCache.get(key);
} else {
return null;
}
}
}
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