| /** |
| * 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 com.twitter.distributedlog.service.stream.limiter; |
| |
| import com.twitter.distributedlog.config.DynamicDistributedLogConfiguration; |
| import com.twitter.distributedlog.exceptions.OverCapacityException; |
| import com.twitter.distributedlog.limiter.ChainedRequestLimiter; |
| import com.twitter.distributedlog.limiter.ComposableRequestLimiter.OverlimitFunction; |
| import com.twitter.distributedlog.limiter.RequestLimiter; |
| import com.twitter.distributedlog.service.stream.StreamOp; |
| import org.apache.bookkeeper.feature.Feature; |
| import org.apache.bookkeeper.stats.StatsLogger; |
| |
| /** |
| * A dynamic request limiter on limiting stream operations. |
| */ |
| public class StreamRequestLimiter extends DynamicRequestLimiter<StreamOp> { |
| private final DynamicDistributedLogConfiguration dynConf; |
| private final StatsLogger limiterStatLogger; |
| private final String streamName; |
| |
| public StreamRequestLimiter(String streamName, |
| DynamicDistributedLogConfiguration dynConf, |
| StatsLogger statsLogger, |
| Feature disabledFeature) { |
| super(dynConf, statsLogger, disabledFeature); |
| this.limiterStatLogger = statsLogger; |
| this.dynConf = dynConf; |
| this.streamName = streamName; |
| this.limiter = build(); |
| } |
| |
| @Override |
| public RequestLimiter<StreamOp> build() { |
| |
| // RPS hard, soft limits |
| RequestLimiterBuilder rpsHardLimiterBuilder = RequestLimiterBuilder.newRpsLimiterBuilder() |
| .statsLogger(limiterStatLogger.scope("rps_hard_limit")) |
| .limit(dynConf.getRpsHardWriteLimit()) |
| .overlimit(new OverlimitFunction<StreamOp>() { |
| @Override |
| public void apply(StreamOp op) throws OverCapacityException { |
| throw new OverCapacityException("Being rate limited: RPS limit exceeded for stream " + streamName); |
| } |
| }); |
| RequestLimiterBuilder rpsSoftLimiterBuilder = RequestLimiterBuilder.newRpsLimiterBuilder() |
| .statsLogger(limiterStatLogger.scope("rps_soft_limit")) |
| .limit(dynConf.getRpsSoftWriteLimit()); |
| |
| // BPS hard, soft limits |
| RequestLimiterBuilder bpsHardLimiterBuilder = RequestLimiterBuilder.newBpsLimiterBuilder() |
| .statsLogger(limiterStatLogger.scope("bps_hard_limit")) |
| .limit(dynConf.getBpsHardWriteLimit()) |
| .overlimit(new OverlimitFunction<StreamOp>() { |
| @Override |
| public void apply(StreamOp op) throws OverCapacityException { |
| throw new OverCapacityException("Being rate limited: BPS limit exceeded for stream " + streamName); |
| } |
| }); |
| RequestLimiterBuilder bpsSoftLimiterBuilder = RequestLimiterBuilder.newBpsLimiterBuilder() |
| .statsLogger(limiterStatLogger.scope("bps_soft_limit")) |
| .limit(dynConf.getBpsSoftWriteLimit()); |
| |
| ChainedRequestLimiter.Builder<StreamOp> builder = new ChainedRequestLimiter.Builder<StreamOp>(); |
| builder.addLimiter(rpsSoftLimiterBuilder.build()); |
| builder.addLimiter(rpsHardLimiterBuilder.build()); |
| builder.addLimiter(bpsSoftLimiterBuilder.build()); |
| builder.addLimiter(bpsHardLimiterBuilder.build()); |
| builder.statsLogger(limiterStatLogger); |
| return builder.build(); |
| } |
| } |