1// Copyright (c) 2018 The Jaeger Authors. 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15package throttler 16 17// Throttler is used to rate limits operations. For example, given how debug spans 18// are always sampled, a throttler can be enabled per client to rate limit the amount 19// of debug spans a client can start. 20type Throttler interface { 21 // IsAllowed determines whether the operation should be allowed and not be 22 // throttled. 23 IsAllowed(operation string) bool 24} 25 26// DefaultThrottler doesn't throttle at all. 27type DefaultThrottler struct{} 28 29// IsAllowed implements Throttler#IsAllowed. 30func (t DefaultThrottler) IsAllowed(operation string) bool { 31 return true 32} 33