| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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 org.apache.cloudstack.ratelimit; |
| |
| /** |
| * Interface to define how an api limit store should work. |
| * |
| */ |
| public interface LimitStore { |
| |
| /** |
| * Returns a store entry for the given account. A value of null means that there is no |
| * such entry and the calling client must call create to avoid |
| * other clients potentially being blocked without any hope of progressing. A non-null |
| * entry means that it has not expired and can be used to determine whether the current client should be allowed to |
| * proceed with the rate-limited action or not. |
| * |
| */ |
| StoreEntry get(Long account); |
| |
| /** |
| * Creates a new store entry |
| * |
| * @param account |
| * the user account, key to the store |
| * @param timeToLiveInSecs |
| * the positive time-to-live in seconds |
| * @return a non-null entry |
| */ |
| StoreEntry create(Long account, int timeToLiveInSecs); |
| |
| void resetCounters(); |
| |
| } |