| // 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.googlesource.gerrit.plugins.ratelimiter; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.inject.Inject; |
| import com.google.inject.assistedinject.Assisted; |
| import java.time.LocalTime; |
| import java.time.format.DateTimeFormatter; |
| import java.util.concurrent.TimeUnit; |
| import org.slf4j.Logger; |
| |
| class WarningHourlyRateLimiter implements RateLimiter { |
| @FunctionalInterface |
| interface Factory { |
| WarningHourlyRateLimiter create(RateLimiter delegate, String key, int warnLimit); |
| } |
| |
| private static final Logger rateLimitLog = RateLimiterStatsLog.getLogger(); |
| private static final DateTimeFormatter format = DateTimeFormatter.ofPattern("mm 'min' ss 'sec'"); |
| |
| private final UserResolver userResolver; |
| private final RateLimiter delegate; |
| private final int warnLimit; |
| private final String key; |
| |
| private volatile boolean wasLogged; |
| private volatile boolean warningWasLogged = false; |
| |
| @Inject |
| WarningHourlyRateLimiter( |
| UserResolver userResolver, |
| @Assisted RateLimiter delegate, |
| @Assisted String key, |
| @Assisted int warnLimit) { |
| this.userResolver = userResolver; |
| this.delegate = delegate; |
| this.warnLimit = warnLimit; |
| this.key = key; |
| } |
| |
| @Override |
| public int permitsPerHour() { |
| return delegate.permitsPerHour(); |
| } |
| |
| @Override |
| public synchronized boolean acquirePermit() { |
| boolean acquirePermit = delegate.acquirePermit(); |
| if (usedPermits() == warnLimit) { |
| rateLimitLog.info( |
| "{} reached the warning limit of {} uploadpacks per hour.", |
| userResolver.getUserName(key).orElse(key), |
| warnLimit); |
| warningWasLogged = true; |
| } |
| |
| if (!acquirePermit && !wasLogged) { |
| rateLimitLog.info( |
| "{} was blocked due to exceeding the limit of {} uploadpacks per hour." |
| + " {} remaining to permits replenishing.", |
| userResolver.getUserName(key).orElse(key), |
| permitsPerHour(), |
| secondsToMsSs(remainingTime(TimeUnit.SECONDS))); |
| wasLogged = true; |
| } |
| return acquirePermit; |
| } |
| |
| @Override |
| public int availablePermits() { |
| return delegate.availablePermits(); |
| } |
| |
| @Override |
| public long remainingTime(TimeUnit timeUnit) { |
| return delegate.remainingTime(timeUnit); |
| } |
| |
| @Override |
| public void replenishPermits() { |
| warningWasLogged = false; |
| delegate.replenishPermits(); |
| } |
| |
| @Override |
| public void close() { |
| delegate.close(); |
| } |
| |
| @Override |
| public int usedPermits() { |
| return delegate.usedPermits(); |
| } |
| |
| private String secondsToMsSs(long seconds) { |
| return LocalTime.MIN.plusSeconds(seconds).format(format); |
| } |
| |
| @VisibleForTesting |
| public boolean getWarningFlagState() { |
| return warningWasLogged; |
| } |
| } |