| // Licensed to 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. Apache Software Foundation (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 memory |
| |
| import ( |
| "github.com/enriquebris/goconcurrentqueue" |
| |
| "github.com/apache/skywalking-satellite/internal/pkg/config" |
| "github.com/apache/skywalking-satellite/internal/pkg/log" |
| "github.com/apache/skywalking-satellite/internal/satellite/event" |
| "github.com/apache/skywalking-satellite/plugins/queue/api" |
| |
| v1 "skywalking.apache.org/repo/goapi/satellite/data/v1" |
| ) |
| |
| const ( |
| Name = "memory-queue" |
| ShowName = "Memory Queue" |
| ) |
| |
| var DefaultOffset = event.Offset{ |
| Position: "", |
| } |
| |
| type Queue struct { |
| config.CommonFields |
| // config |
| EventBufferSize int `mapstructure:"event_buffer_size"` // The maximum buffer event size. |
| |
| // components |
| buffer *goconcurrentqueue.FixedFIFO |
| } |
| |
| func (q *Queue) Name() string { |
| return Name |
| } |
| |
| func (q *Queue) ShowName() string { |
| return ShowName |
| } |
| |
| func (q *Queue) Description() string { |
| return "This is a memory queue to buffer the input event." |
| } |
| |
| func (q *Queue) DefaultConfig() string { |
| return ` |
| # The maximum buffer event size. |
| event_buffer_size: 5000 |
| ` |
| } |
| |
| func (q *Queue) Initialize() error { |
| q.buffer = goconcurrentqueue.NewFixedFIFO(q.EventBufferSize) |
| return nil |
| } |
| |
| func (q *Queue) Enqueue(e *v1.SniffData) error { |
| if err := q.buffer.Enqueue(e); err != nil { |
| log.Logger.Errorf("error in enqueue: %v", err) |
| return api.ErrFull |
| } |
| return nil |
| } |
| |
| func (q *Queue) Dequeue() (*api.SequenceEvent, error) { |
| element, err := q.buffer.Dequeue() |
| if err != nil { |
| log.Logger.Debugf("error in dequeue: %v", err) |
| return nil, api.ErrEmpty |
| } |
| return &api.SequenceEvent{ |
| Event: element.(*v1.SniffData), |
| Offset: DefaultOffset, |
| }, nil |
| } |
| |
| func (q *Queue) Close() error { |
| return nil |
| } |
| |
| func (q *Queue) Ack(_ *event.Offset) { |
| } |
| |
| func (q *Queue) TotalSize() int64 { |
| return int64(q.EventBufferSize) |
| } |
| |
| func (q *Queue) UsedCount() int64 { |
| return int64(q.buffer.GetLen()) |
| } |
| |
| func (q *Queue) IsFull() bool { |
| return q.UsedCount() >= q.TotalSize() |
| } |