// Copyright (C) 2011 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.account;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
import com.google.gerrit.reviewdb.client.AccountGroup;
import com.google.gerrit.reviewdb.client.AccountGroupInclude;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.cache.CacheModule;
import com.google.gwtorm.server.SchemaFactory;
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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ExecutionException;
/** Tracks group inclusions in memory for efficient access. */
@Singleton
public class GroupIncludeCacheImpl implements GroupIncludeCache {
private static final Logger log = LoggerFactory
.getLogger(GroupIncludeCacheImpl.class);
private static final String BYINCLUDE_NAME = "groups_byinclude";
public static Module module() {
return new CacheModule() {
@Override
protected void configure() {
cache(BYINCLUDE_NAME,
AccountGroup.UUID.class,
new TypeLiteral<Set<AccountGroup.UUID>>() {})
.loader(ByIncludeLoader.class);
bind(GroupIncludeCacheImpl.class);
bind(GroupIncludeCache.class).to(GroupIncludeCacheImpl.class);
}
};
}
private final LoadingCache<AccountGroup.UUID, Set<AccountGroup.UUID>> byInclude;
@Inject
GroupIncludeCacheImpl(
@Named(BYINCLUDE_NAME) LoadingCache<AccountGroup.UUID, Set<AccountGroup.UUID>> byInclude) {
this.byInclude = byInclude;
}
public Collection<AccountGroup.UUID> getByInclude(AccountGroup.UUID groupId) {
try {
return byInclude.get(groupId);
} catch (ExecutionException e) {
log.warn("Cannot load included groups", e);
return Collections.emptySet();
}
}
public void evictInclude(AccountGroup.UUID groupId) {
if (groupId != null) {
byInclude.invalidate(groupId);
}
}
static class ByIncludeLoader extends
CacheLoader<AccountGroup.UUID, Set<AccountGroup.UUID>> {
private final SchemaFactory<ReviewDb> schema;
@Inject
ByIncludeLoader(final SchemaFactory<ReviewDb> sf) {
schema = sf;
}
@Override
public Set<AccountGroup.UUID> load(AccountGroup.UUID key) throws Exception {
final ReviewDb db = schema.open();
try {
List<AccountGroup> group = db.accountGroups().byUUID(key).toList();
if (group.size() != 1) {
return Collections.emptySet();
}
Set<AccountGroup.Id> ids = Sets.newHashSet();
for (AccountGroupInclude agi : db.accountGroupIncludes()
.byInclude(group.get(0).getId())) {
ids.add(agi.getGroupId());
}
Set<AccountGroup.UUID> groupArray = Sets.newHashSet();
for (AccountGroup g : db.accountGroups().get(ids)) {
groupArray.add(g.getGroupUUID());
}
return ImmutableSet.copyOf(groupArray);
} finally {
db.close();
}
}
}
}