| // 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.quota; |
| |
| import com.google.common.collect.ArrayTable; |
| import com.google.common.collect.Table; |
| import java.text.MessageFormat; |
| import java.util.Arrays; |
| import java.util.Locale; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.concurrent.TimeUnit; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import org.eclipse.jgit.lib.Config; |
| import org.eclipse.jgit.lib.Config.ConfigEnum; |
| import org.eclipse.jgit.lib.Config.SectionParser; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class AccountLimitsConfig { |
| private static final int DEFAULT_BURST_COUNT = 30; |
| private static final int DEFAULT_INTERVAL_SECONDS = 60; |
| private static final Logger log = |
| LoggerFactory.getLogger(AccountLimitsConfig.class); |
| static final String GROUP_SECTION = "group"; |
| static final SectionParser<AccountLimitsConfig> KEY = |
| new SectionParser<AccountLimitsConfig>() { |
| @Override |
| public AccountLimitsConfig parse(final Config cfg) { |
| return new AccountLimitsConfig(cfg); |
| } |
| }; |
| |
| public static class RateLimit { |
| public Type getType() { |
| return type; |
| } |
| |
| public double getRatePerSecond() { |
| return ratePerSecond; |
| } |
| |
| public int getMaxBurstSeconds() { |
| return maxBurstSeconds; |
| } |
| |
| private Type type; |
| private double ratePerSecond; |
| private int maxBurstSeconds; |
| |
| public RateLimit(Type type, double ratePerSecond, int maxBurstSeconds) { |
| this.type = type; |
| this.ratePerSecond = ratePerSecond; |
| this.maxBurstSeconds = maxBurstSeconds; |
| } |
| } |
| |
| public static enum Type implements ConfigEnum { |
| UPLOADPACK; |
| |
| @Override |
| public String toConfigValue() { |
| return name().toLowerCase(Locale.ROOT); |
| } |
| |
| @Override |
| public boolean matchConfigValue(String in) { |
| return name().equalsIgnoreCase(in); |
| } |
| } |
| |
| private Table<Type, String, RateLimit> rateLimits; |
| |
| private AccountLimitsConfig(final Config c) { |
| Set<String> groups = c.getSubsections(GROUP_SECTION); |
| if (groups.size() == 0) { |
| return; |
| } |
| rateLimits = ArrayTable.create(Arrays.asList(Type.values()), groups); |
| for (String groupName : groups) { |
| Type type = Type.UPLOADPACK; |
| rateLimits.put(type, groupName, |
| parseRateLimit(c, groupName, type)); |
| } |
| } |
| |
| RateLimit parseRateLimit(Config c, String groupName, Type type) { |
| String name = type.toConfigValue(); |
| String value = c.getString(GROUP_SECTION, groupName, name).trim(); |
| if (value == null) { |
| return defaultRateLimit(type); |
| } |
| |
| Matcher m = Pattern.compile("^\\s*(\\d+)\\s*/\\s*(.*)\\s*burst\\s*(\\d+)$") |
| .matcher(value); |
| if (!m.matches()) { |
| log.warn( |
| "Invalid ''{}'' ratelimit configuration ''{}'', use default ratelimit {}/hour", |
| name, value, 3600.0D / DEFAULT_INTERVAL_SECONDS); |
| return defaultRateLimit(type); |
| } |
| |
| String digits = m.group(1); |
| String unitName = m.group(2).trim(); |
| String storeCountString = m.group(3).trim(); |
| long burstCount = DEFAULT_BURST_COUNT; |
| try { |
| burstCount = Long.parseLong(storeCountString); |
| } catch (NumberFormatException e) { |
| log.warn( |
| "Invalid ''{}'' ratelimit store configuration ''{}'', use default burst count ''{}''", |
| name, storeCountString, burstCount); |
| } |
| |
| TimeUnit inputUnit = TimeUnit.HOURS; |
| double ratePerSecond = 1.0D / DEFAULT_INTERVAL_SECONDS; |
| if (unitName.isEmpty()) { |
| inputUnit = TimeUnit.SECONDS; |
| } else if (match(unitName, "s", "sec", "second")) { |
| inputUnit = TimeUnit.SECONDS; |
| } else if (match(unitName, "m", "min", "minute")) { |
| inputUnit = TimeUnit.MINUTES; |
| } else if (match(unitName, "h", "hr", "hour")) { |
| inputUnit = TimeUnit.HOURS; |
| } else if (match(unitName, "d", "day")) { |
| inputUnit = TimeUnit.DAYS; |
| } else { |
| logNotRateUnit(GROUP_SECTION, groupName, name, value); |
| } |
| try { |
| ratePerSecond = 1.0D * Long.parseLong(digits) |
| / TimeUnit.SECONDS.convert(1, inputUnit); |
| } catch (NumberFormatException nfe) { |
| logNotRateUnit(GROUP_SECTION, groupName, unitName, value); |
| } |
| |
| int maxBurstSeconds = (int) (burstCount / ratePerSecond); |
| return new RateLimit(type, ratePerSecond, maxBurstSeconds); |
| } |
| |
| private static boolean match(final String a, final String... cases) { |
| for (final String b : cases) { |
| if (b != null && b.equalsIgnoreCase(a)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private void logNotRateUnit(String section, String subsection, String name, |
| String valueString) { |
| if (subsection != null) { |
| log.error(MessageFormat.format("Invalid rate unit value: {0}.{1}.{2}={3}", |
| section, subsection, name, valueString)); |
| } else { |
| log.error(MessageFormat.format("Invalid rate unit value: {0}.{1}={2}", |
| section, name, valueString)); |
| } |
| } |
| |
| private RateLimit defaultRateLimit(Type type) { |
| return new RateLimit(type, 1.0D / DEFAULT_INTERVAL_SECONDS, |
| DEFAULT_INTERVAL_SECONDS * DEFAULT_BURST_COUNT); |
| } |
| |
| /** |
| * @param type type of rate limit |
| * @return map of rate limits per group name |
| */ |
| Optional<Map<String, RateLimit>> getRatelimits(Type type) { |
| if (rateLimits != null) { |
| return Optional.ofNullable(rateLimits.row(type)); |
| } |
| return Optional.empty(); |
| } |
| } |