| // 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 nativelog |
| |
| import ( |
| "fmt" |
| "reflect" |
| |
| "github.com/Shopify/sarama" |
| |
| "github.com/apache/skywalking-satellite/internal/pkg/config" |
| "github.com/apache/skywalking-satellite/internal/satellite/event" |
| |
| v1 "skywalking.apache.org/repo/goapi/satellite/data/v1" |
| ) |
| |
| const ( |
| Name = "native-log-kafka-forwarder" |
| ShowName = "Native Log Kafka Forwarder" |
| ) |
| |
| type Forwarder struct { |
| config.CommonFields |
| Topic string `mapstructure:"topic"` // The forwarder topic. |
| producer sarama.SyncProducer |
| } |
| |
| func (f *Forwarder) Name() string { |
| return Name |
| } |
| |
| func (f *Forwarder) ShowName() string { |
| return ShowName |
| } |
| |
| func (f *Forwarder) Description() string { |
| return "This is a synchronization Kafka forwarder with the SkyWalking native log protocol." |
| } |
| |
| func (f *Forwarder) DefaultConfig() string { |
| return ` |
| # The remote topic. |
| topic: "log-topic" |
| ` |
| } |
| |
| func (f *Forwarder) Prepare(connection interface{}) error { |
| client, ok := connection.(sarama.Client) |
| if !ok { |
| return fmt.Errorf("the %s is only accepet the kafka client, but receive a %s", |
| f.Name(), reflect.TypeOf(connection).String()) |
| } |
| producer, err := sarama.NewSyncProducerFromClient(client) |
| if err != nil { |
| return err |
| } |
| f.producer = producer |
| return nil |
| } |
| |
| func (f *Forwarder) Forward(batch event.BatchEvents) error { |
| var message []*sarama.ProducerMessage |
| for _, e := range batch { |
| data, ok := e.GetData().(*v1.SniffData_Log) |
| if !ok { |
| continue |
| } |
| message = append(message, &sarama.ProducerMessage{ |
| Topic: f.Topic, |
| Value: sarama.ByteEncoder(data.Log), |
| }) |
| } |
| return f.producer.SendMessages(message) |
| } |
| |
| func (f *Forwarder) ForwardType() v1.SniffType { |
| return v1.SniffType_Logging |
| } |
| |
| func (f *Forwarder) SyncForward(_ *v1.SniffData) (*v1.SniffData, error) { |
| return nil, fmt.Errorf("unsupport sync forward") |
| } |
| |
| func (f *Forwarder) SupportedSyncInvoke() bool { |
| return false |
| } |