81 lines
2.3 KiB
C#
81 lines
2.3 KiB
C#
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Threading;
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using Amqp.Framing;
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using Amqp;
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using System.Threading.Tasks;
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namespace Artemis.Perf
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{
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// this has been copied from Artemis' TokenBucketLimiter with some modifications
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public class TokenBucketLimiterImpl {
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private int rate;
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/**
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* Even thought we don't use TokenBucket in multiThread
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* the implementation should keep this volatile for correctness
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*/
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private long last;
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/**
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* Even thought we don't use TokenBucket in multiThread
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* the implementation should keep this volatile for correctness
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*/
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private int tokens;
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public TokenBucketLimiterImpl(int rate) {
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this.rate = rate;
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}
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private bool checkRate() {
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long now = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
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if (last == 0) {
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last = now;
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}
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long diff = now - last;
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if (diff >= 1000) {
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last = now;
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tokens = rate;
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}
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if (tokens > 0) {
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tokens--;
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return true;
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} else {
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return false;
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}
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}
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public void limit() {
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if (!checkRate()) {
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// Console.WriteLine("Limiting messages per max rate");
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do {
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Thread.Sleep(1);
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} while (!checkRate());
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}
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}
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}
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} |