mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-16 10:19:23 +02:00
52fb033e13
The `go.opentelemetry.io/otel/exporter/trace/jaeger` package was mistakenly released with a `v1.0.0` tag instead of `v0.1.0`. This resulted in all subsequent releases not becoming the default latest, meaning that `go get`s pulled in the incompatible `v0.1.0` release of that package when pulling in more recent packages from other otel packages. Renaming the `exporter` directory to `exporters` fixes this issue by consequentially renaming the package. Additionally, this action also renames *all* exporters. This is understood to be a disruptive action to existing users as they will need to update any dependencies they currently have on our exporters. However, it was decided to take this action regardless. The need to resolve the existing issue explained above is highly important, and given the Alpha state of this project these kinds of breaking changes should be expected (though not without reason). Resolves #331 Co-authored-by: Rahul Patel <rghetia@yahoo.com>
91 lines
2.8 KiB
Go
91 lines
2.8 KiB
Go
// Copyright 2019, OpenTelemetry Authors
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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 jaeger
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import (
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"fmt"
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"io"
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"net"
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"github.com/apache/thrift/lib/go/thrift"
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gen "go.opentelemetry.io/otel/exporters/trace/jaeger/internal/gen-go/jaeger"
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)
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// udpPacketMaxLength is the max size of UDP packet we want to send, synced with jaeger-agent
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const udpPacketMaxLength = 65000
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// agentClientUDP is a UDP client to Jaeger agent that implements gen.Agent interface.
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type agentClientUDP struct {
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gen.Agent
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io.Closer
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connUDP *net.UDPConn
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client *gen.AgentClient
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maxPacketSize int // max size of datagram in bytes
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thriftBuffer *thrift.TMemoryBuffer // buffer used to calculate byte size of a span
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}
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// newAgentClientUDP creates a client that sends spans to Jaeger Agent over UDP.
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func newAgentClientUDP(hostPort string, maxPacketSize int) (*agentClientUDP, error) {
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if maxPacketSize == 0 {
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maxPacketSize = udpPacketMaxLength
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}
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thriftBuffer := thrift.NewTMemoryBufferLen(maxPacketSize)
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protocolFactory := thrift.NewTCompactProtocolFactory()
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client := gen.NewAgentClientFactory(thriftBuffer, protocolFactory)
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destAddr, err := net.ResolveUDPAddr("udp", hostPort)
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if err != nil {
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return nil, err
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}
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connUDP, err := net.DialUDP(destAddr.Network(), nil, destAddr)
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if err != nil {
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return nil, err
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}
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if err := connUDP.SetWriteBuffer(maxPacketSize); err != nil {
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return nil, err
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}
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clientUDP := &agentClientUDP{
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connUDP: connUDP,
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client: client,
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maxPacketSize: maxPacketSize,
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thriftBuffer: thriftBuffer}
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return clientUDP, nil
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}
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// EmitBatch implements EmitBatch() of Agent interface
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func (a *agentClientUDP) EmitBatch(batch *gen.Batch) error {
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a.thriftBuffer.Reset()
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a.client.SeqId = 0 // we have no need for distinct SeqIds for our one-way UDP messages
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if err := a.client.EmitBatch(batch); err != nil {
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return err
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}
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if a.thriftBuffer.Len() > a.maxPacketSize {
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return fmt.Errorf("data does not fit within one UDP packet; size %d, max %d, spans %d",
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a.thriftBuffer.Len(), a.maxPacketSize, len(batch.Spans))
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}
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_, err := a.connUDP.Write(a.thriftBuffer.Bytes())
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return err
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}
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// Close implements Close() of io.Closer and closes the underlying UDP connection.
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func (a *agentClientUDP) Close() error {
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return a.connUDP.Close()
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}
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