| // 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.common.Nullable; |
| import com.google.gerrit.reviewdb.client.Account; |
| import java.io.IOException; |
| |
| /** Caches important (but small) account state to avoid database hits. */ |
| public interface AccountCache { |
| /** |
| * Returns an {@code AccountState} instance for the given account ID. If not cached yet the |
| * account is loaded. Returns an empty {@code AccountState} instance to represent a missing |
| * account. |
| * |
| * @param accountId ID of the account that should be retrieved |
| * @return {@code AccountState} instance for the given account ID, if no account with this ID |
| * exists an empty {@code AccountState} instance is returned to represent the missing account |
| */ |
| AccountState get(Account.Id accountId); |
| |
| /** |
| * Returns an {@code AccountState} instance for the given account ID. If not cached yet the |
| * account is loaded. Returns {@code null} if the account is missing. |
| * |
| * @param accountId ID of the account that should be retrieved |
| * @return {@code AccountState} instance for the given account ID, if no account with this ID |
| * exists {@code null} is returned |
| */ |
| @Nullable |
| AccountState getOrNull(Account.Id accountId); |
| |
| /** |
| * Returns an {@code AccountState} instance for the given account ID if it is present in the |
| * cache. |
| * |
| * @param accountId ID of the account that should be retrieved |
| * @return {@code AccountState} instance for the given account ID if it is present in the cache, |
| * otherwise {@code null} |
| */ |
| AccountState getIfPresent(Account.Id accountId); |
| |
| AccountState getByUsername(String username); |
| |
| void evict(Account.Id accountId) throws IOException; |
| |
| void evictByUsername(String username); |
| |
| void evictAll() throws IOException; |
| } |