mirror of https://github.com/harness/drone.git
60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
// Copyright 2023 Harness, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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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package usage
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import "context"
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type queue struct {
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ch chan Metric
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}
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func newQueue() *queue {
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return &queue{
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ch: make(chan Metric, 1024),
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}
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}
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func (q *queue) Add(ctx context.Context, payload Metric) {
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select {
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case <-ctx.Done():
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return
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case q.ch <- payload:
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default:
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// queue is full then wait in new go routine
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// until one of consumer read from channel,
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// we dont want to block caller goroutine
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go func() {
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q.ch <- payload
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}()
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}
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}
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func (q *queue) Pop(ctx context.Context) (*Metric, error) {
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select {
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case <-ctx.Done():
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return nil, ctx.Err()
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case payload := <-q.ch:
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return &payload, nil
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}
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}
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func (q *queue) Close() {
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close(q.ch)
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}
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func (q *queue) Len() int {
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return len(q.ch)
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}
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