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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.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.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.Collections;
import java.util.HashSet;
import java.util.Set;
/** Translates an email address to a set of matching accounts. */
@Singleton
public class AccountByEmailCacheImpl implements AccountByEmailCache {
private static final String CACHE_NAME = "accounts_byemail";
public static Module module() {
return new CacheModule() {
@Override
protected void configure() {
final TypeLiteral<Cache<String, Set<Account.Id>>> type =
new TypeLiteral<Cache<String, Set<Account.Id>>>() {};
core(type, CACHE_NAME).populateWith(Loader.class);
bind(AccountByEmailCacheImpl.class);
bind(AccountByEmailCache.class).to(AccountByEmailCacheImpl.class);
}
};
}
private final Cache<String, Set<Account.Id>> cache;
@Inject
AccountByEmailCacheImpl(
@Named(CACHE_NAME) final Cache<String, Set<Account.Id>> cache) {
this.cache = cache;
}
public Set<Account.Id> get(final String email) {
return cache.get(email);
}
public void evict(final String email) {
cache.remove(email);
}
static class Loader extends EntryCreator<String, Set<Account.Id>> {
private final SchemaFactory<ReviewDb> schema;
@Inject
Loader(final SchemaFactory<ReviewDb> schema) {
this.schema = schema;
}
@Override
public Set<Account.Id> createEntry(final String email) throws Exception {
final ReviewDb db = schema.open();
try {
final HashSet<Account.Id> r = new HashSet<Account.Id>();
for (Account a : db.accounts().byPreferredEmail(email)) {
r.add(a.getId());
}
for (AccountExternalId a : db.accountExternalIds()
.byEmailAddress(email)) {
r.add(a.getAccountId());
}
return pack(r);
} finally {
db.close();
}
}
@Override
public Set<Account.Id> missing(final String key) {
return Collections.emptySet();
}
private static Set<Account.Id> pack(final Set<Account.Id> c) {
switch (c.size()) {
case 0:
return Collections.emptySet();
case 1:
return one(c);
default:
return Collections.unmodifiableSet(new HashSet<Account.Id>(c));
}
}
private static <T> Set<T> one(final Set<T> c) {
return Collections.singleton(c.iterator().next());
}
}
}
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