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|
<?php
namespace Jaeger\Sender;
use Jaeger\Mapper\SpanToJaegerMapper;
use Jaeger\Span as JaegerSpan;
use Jaeger\Thrift\Agent\AgentClient;
use Jaeger\Thrift\Agent\AgentIf;
use Jaeger\Thrift\Batch;
use Jaeger\Thrift\Process;
use Jaeger\Thrift\Span as JaegerThriftSpan;
use Jaeger\Thrift\Tag;
use Jaeger\Thrift\TagType;
use Jaeger\Tracer;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;
use Thrift\Protocol\TBinaryProtocol;
use Thrift\Protocol\TCompactProtocol;
use Thrift\Transport\TMemoryBuffer;
use const Jaeger\JAEGER_HOSTNAME_TAG_KEY;
class JaegerSender implements SenderInterface
{
/**
* @var JaegerSpan[]
*/
private $spans = [];
/**
* @var AgentIf
*/
private $agentClient;
/**
* @var LoggerInterface
*/
private $logger;
/**
* @var Tracer
*/
private $tracer;
/**
* @var SpanToJaegerMapper
*/
private $mapper;
/**
* @var int
*/
private $jaegerBatchOverheadLength = 512;
/**
* The maximum length of the thrift-objects for a jaeger-batch.
*
* @var int
*/
private $maxBufferLength = 64000;
/**
* @param AgentIf $agentClient
* @param LoggerInterface|null $logger
* @param SpanToJaegerMapper|null $mapper
*/
public function __construct(
AgentIf $agentClient,
LoggerInterface $logger = null,
SpanToJaegerMapper $mapper = null
) {
$this->agentClient = $agentClient;
$this->logger = $logger ?? new NullLogger();
$this->mapper = $mapper ?? new SpanToJaegerMapper();
}
public function flush(): int
{
$count = count($this->spans);
if ($count === 0) {
return 0;
}
$jaegerThriftSpans = $this->makeJaegerBatch($this->spans);
try {
$this->send($jaegerThriftSpans);
} catch (\Exception $e) {
$this->logger->warning($e->getMessage());
}
$this->spans = [];
return $count;
}
public function setMaxBufferLength($maxBufferLength)
{
$this->maxBufferLength = $maxBufferLength;
}
/**
* @param JaegerSpan[] $spans
* @return array
*/
private function makeJaegerBatch(array $spans) : array
{
/** @var JaegerThriftSpan[] $jaegerSpans */
$jaegerSpans = [];
foreach ($spans as $span) {
if (empty($this->tracer)) {
$this->tracer = $span->getTracer();
}
$jaegerSpans[] = $this->mapper->mapSpanToJaeger($span);
}
return $jaegerSpans;
}
/**
* @param JaegerThriftSpan[] $spans
*/
private function send(array $spans)
{
if (empty($this->tracer)) {
return ;
}
$chunks = $this->chunkSplit($spans);
foreach ($chunks as $chunk) {
/** @var JaegerThriftSpan[] $chunk */
$this->emitJaegerBatch($chunk);
}
}
/**
* @param JaegerThriftSpan $span
*/
private function getBufferLength($span)
{
$memoryBuffer = new TMemoryBuffer();
$span->write(new TBinaryProtocol($memoryBuffer));
return $memoryBuffer->available();
}
private function chunkSplit(array $spans): array
{
$actualBufferSize = $this->jaegerBatchOverheadLength;
$chunkId = 0;
$chunks = [];
foreach ($spans as $span) {
$spanBufferLength = $this->getBufferLength($span);
if (!empty($chunks[$chunkId]) && ($actualBufferSize + $spanBufferLength) > $this->maxBufferLength) {
// point to next chunk
++$chunkId;
// reset buffer size
$actualBufferSize = $this->jaegerBatchOverheadLength;
}
if (!isset($chunks[$chunkId])) {
$chunks[$chunkId] = [];
}
$chunks[$chunkId][] = $span;
$actualBufferSize += $spanBufferLength;
}
return $chunks;
}
protected function emitJaegerBatch(array $spans)
{
/** @var Tag[] $tags */
$tags = [];
foreach ($this->tracer->getTags() as $k => $v) {
if (!in_array($k, $this->mapper->getSpecialSpanTags())) {
if (strpos($k, $this->mapper->getProcessTagsPrefix()) !== 0) {
continue ;
}
$quoted = preg_quote($this->mapper->getProcessTagsPrefix());
$k = preg_replace(sprintf('/^%s/', $quoted), '', $k);
}
if ($k === JAEGER_HOSTNAME_TAG_KEY) {
$k = "hostname";
}
$tags[] = new Tag([
"key" => $k,
"vType" => TagType::STRING,
"vStr" => $v
]);
}
$tags[] = new Tag([
"key" => "format",
"vType" => TagType::STRING,
"vStr" => "jaeger.thrift"
]);
$tags[] = new Tag([
"key" => "ip",
"vType" => TagType::STRING,
"vStr" => $this->tracer->getIpAddress()
]);
$batch = new Batch([
"spans" => $spans,
"process" => new Process([
"serviceName" => $this->tracer->getServiceName(),
"tags" => $tags
])
]);
$this->agentClient->emitBatch($batch);
}
/**
* @param JaegerSpan $span
*/
public function append(JaegerSpan $span)
{
$this->spans[] = $span;
}
public function close()
{
}
}
|
