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// Copyright (C) 2017 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 static com.google.common.collect.ImmutableSet.toImmutableSet;
import com.google.common.base.Throwables;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ImmutableSetMultimap;
import com.google.common.collect.Streams;
import com.google.gerrit.reviewdb.client.Account;
import com.google.gerrit.server.account.externalids.ExternalId;
import com.google.gerrit.server.account.externalids.ExternalIds;
import com.google.gerrit.server.query.account.InternalAccountQuery;
import com.google.gerrit.server.update.RetryHelper;
import com.google.gerrit.server.update.RetryHelper.Action;
import com.google.gerrit.server.update.RetryHelper.ActionType;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.io.IOException;
/** Class to access accounts by email. */
@Singleton
public class Emails {
private final ExternalIds externalIds;
private final Provider<InternalAccountQuery> queryProvider;
private final RetryHelper retryHelper;
@Inject
public Emails(
ExternalIds externalIds,
Provider<InternalAccountQuery> queryProvider,
RetryHelper retryHelper) {
this.externalIds = externalIds;
this.queryProvider = queryProvider;
this.retryHelper = retryHelper;
}
/**
* Returns the accounts with the given email.
*
* <p>Each email should belong to a single account only. This means if more than one account is
* returned there is an inconsistency in the external IDs.
*
* <p>The accounts are retrieved via the external ID cache. Each access to the external ID cache
* requires reading the SHA1 of the refs/meta/external-ids branch. If accounts for multiple emails
* are needed it is more efficient to use {@link #getAccountsFor(String...)} as this method reads
* the SHA1 of the refs/meta/external-ids branch only once (and not once per email).
*
* <p>In addition accounts are included that have the given email as preferred email even if they
* have no external ID for the preferred email. Having accounts with a preferred email that does
* not exist as external ID is an inconsistency, but existing functionality relies on still
* getting those accounts, which is why they are included. Accounts by preferred email are fetched
* from the account index.
*
* @see #getAccountsFor(String...)
*/
public ImmutableSet<Account.Id> getAccountFor(String email) throws IOException, OrmException {
return Streams.concat(
externalIds.byEmail(email).stream().map(ExternalId::accountId),
executeIndexQuery(() -> queryProvider.get().byPreferredEmail(email).stream())
.map(a -> a.getAccount().getId()))
.collect(toImmutableSet());
}
/**
* Returns the accounts for the given emails.
*
* @see #getAccountFor(String)
*/
public ImmutableSetMultimap<String, Account.Id> getAccountsFor(String... emails)
throws IOException, OrmException {
ImmutableSetMultimap.Builder<String, Account.Id> builder = ImmutableSetMultimap.builder();
externalIds.byEmails(emails).entries().stream()
.forEach(e -> builder.put(e.getKey(), e.getValue().accountId()));
executeIndexQuery(() -> queryProvider.get().byPreferredEmail(emails).entries().stream())
.forEach(e -> builder.put(e.getKey(), e.getValue().getAccount().getId()));
return builder.build();
}
/**
* Returns the accounts with the given email.
*
* <p>This method behaves just like {@link #getAccountFor(String)}, except that accounts are not
* looked up by their preferred email. Thus, this method does not rely on the accounts index.
*/
public ImmutableSet<Account.Id> getAccountForExternal(String email) throws IOException {
return externalIds.byEmail(email).stream().map(ExternalId::accountId).collect(toImmutableSet());
}
private <T> T executeIndexQuery(Action<T> action) throws OrmException {
try {
return retryHelper.execute(ActionType.INDEX_QUERY, action, OrmException.class::isInstance);
} catch (Exception e) {
Throwables.throwIfUnchecked(e);
Throwables.throwIfInstanceOf(e, OrmException.class);
throw new OrmException(e);
}
}
}
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