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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.account;
import com.google.gerrit.reviewdb.Account;
import com.google.gerrit.reviewdb.AccountExternalId;
import com.google.gerrit.reviewdb.AccountGroup;
import com.google.gerrit.reviewdb.AccountGroupMember;
import com.google.gerrit.reviewdb.ReviewDb;
import com.google.gerrit.server.cache.Cache;
import com.google.gerrit.server.cache.CacheModule;
import com.google.gerrit.server.cache.EntryCreator;
import com.google.gerrit.server.config.AuthConfig;
import com.google.gwtorm.client.OrmException;
import com.google.gwtorm.client.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 java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/** Caches important (but small) account state to avoid database hits. */
@Singleton
public class AccountCacheImpl implements AccountCache {
private static final String BYID_NAME = "accounts";
private static final String BYUSER_NAME = "accounts_byname";
public static Module module() {
return new CacheModule() {
@Override
protected void configure() {
final TypeLiteral<Cache<Account.Id, AccountState>> byIdType =
new TypeLiteral<Cache<Account.Id, AccountState>>() {};
core(byIdType, BYID_NAME).populateWith(ByIdLoader.class);
final TypeLiteral<Cache<String, Account.Id>> byUsernameType =
new TypeLiteral<Cache<String, Account.Id>>() {};
core(byUsernameType, BYUSER_NAME).populateWith(ByNameLoader.class);
bind(AccountCacheImpl.class);
bind(AccountCache.class).to(AccountCacheImpl.class);
}
};
}
private final Cache<Account.Id, AccountState> byId;
private final Cache<String, Account.Id> byName;
@Inject
AccountCacheImpl(@Named(BYID_NAME) Cache<Account.Id, AccountState> byId,
@Named(BYUSER_NAME) Cache<String, Account.Id> byUsername) {
this.byId = byId;
this.byName = byUsername;
}
public AccountState get(final Account.Id accountId) {
return byId.get(accountId);
}
@Override
public AccountState getByUsername(String username) {
Account.Id id = byName.get(username);
return id != null ? byId.get(id) : null;
}
public void evict(final Account.Id accountId) {
byId.remove(accountId);
}
public void evictByUsername(String username) {
byName.remove(username);
}
static class ByIdLoader extends EntryCreator<Account.Id, AccountState> {
private final SchemaFactory<ReviewDb> schema;
private final Set<AccountGroup.Id> registered;
private final Set<AccountGroup.Id> anonymous;
private final GroupCache groupCache;
private final Cache<String, Account.Id> byName;
@Inject
ByIdLoader(SchemaFactory<ReviewDb> sf, AuthConfig auth,
GroupCache groupCache,
@Named(BYUSER_NAME) Cache<String, Account.Id> byUsername) {
this.schema = sf;
this.registered = auth.getRegisteredGroups();
this.anonymous = auth.getAnonymousGroups();
this.groupCache = groupCache;
this.byName = byUsername;
}
@Override
public AccountState createEntry(final Account.Id key) throws Exception {
final ReviewDb db = schema.open();
try {
final AccountState state = load(db, key);
if (state.getUserName() != null) {
byName.put(state.getUserName(), state.getAccount().getId());
}
return state;
} finally {
db.close();
}
}
private AccountState load(final ReviewDb db, final Account.Id who)
throws OrmException {
final Account account = db.accounts().get(who);
if (account == null) {
// Account no longer exists? They are anonymous.
//
return missing(who);
}
final Collection<AccountExternalId> externalIds =
Collections.unmodifiableCollection(db.accountExternalIds().byAccount(
who).toList());
Set<AccountGroup.Id> internalGroups = new HashSet<AccountGroup.Id>();
for (AccountGroupMember g : db.accountGroupMembers().byAccount(who)) {
final AccountGroup.Id groupId = g.getAccountGroupId();
final AccountGroup group = groupCache.get(groupId);
if (group != null && group.getType() == AccountGroup.Type.INTERNAL) {
internalGroups.add(groupId);
}
}
if (internalGroups.isEmpty()) {
internalGroups = registered;
} else {
internalGroups.addAll(registered);
internalGroups = Collections.unmodifiableSet(internalGroups);
}
return new AccountState(account, internalGroups, externalIds);
}
@Override
public AccountState missing(final Account.Id accountId) {
final Account account = new Account(accountId);
final Collection<AccountExternalId> ids = Collections.emptySet();
return new AccountState(account, anonymous, ids);
}
}
static class ByNameLoader extends EntryCreator<String, Account.Id> {
private final SchemaFactory<ReviewDb> schema;
@Inject
ByNameLoader(final SchemaFactory<ReviewDb> sf) {
this.schema = sf;
}
@Override
public Account.Id createEntry(final String username) throws Exception {
final ReviewDb db = schema.open();
try {
final AccountExternalId.Key key = new AccountExternalId.Key( //
AccountExternalId.SCHEME_USERNAME, //
username);
final AccountExternalId id = db.accountExternalIds().get(key);
return id != null ? id.getAccountId() : null;
} finally {
db.close();
}
}
}
}
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