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<?php
declare(strict_types=1);
namespace OpenTelemetry\SDK\Logs\Exporter;
use OpenTelemetry\SDK\Common\Export\TransportInterface;
use OpenTelemetry\SDK\Common\Future\CancellationInterface;
use OpenTelemetry\SDK\Common\Future\CompletedFuture;
use OpenTelemetry\SDK\Common\Future\FutureInterface;
use OpenTelemetry\SDK\Common\Instrumentation\InstrumentationScopeInterface;
use OpenTelemetry\SDK\Logs\LogRecordExporterInterface;
use OpenTelemetry\SDK\Logs\ReadableLogRecord;
use OpenTelemetry\SDK\Resource\ResourceInfo;
/**
* A JSON console exporter for LogRecords. This is only useful for testing; the
* output is human-readable, and is not compatible with the OTLP format.
*/
class ConsoleExporter implements LogRecordExporterInterface
{
private TransportInterface $transport;
public function __construct(TransportInterface $transport)
{
$this->transport = $transport;
}
/**
* @param iterable<mixed, ReadableLogRecord> $batch
*/
public function export(iterable $batch, ?CancellationInterface $cancellation = null): FutureInterface
{
$resource = null;
$scopes = [];
foreach ($batch as $record) {
if (!$resource) {
$resource = $this->convertResource($record->getResource());
}
$key = $this->scopeKey($record->getInstrumentationScope());
if (!array_key_exists($key, $scopes)) {
$scopes[$key] = $this->convertInstrumentationScope($record->getInstrumentationScope());
}
$scopes[$key]['logs'][] = $this->convertLogRecord($record);
}
$output = [
'resource' => $resource,
'scopes' => array_values($scopes),
];
$this->transport->send(json_encode($output, JSON_PRETTY_PRINT));
return new CompletedFuture(true);
}
public function forceFlush(?CancellationInterface $cancellation = null): bool
{
return true;
}
public function shutdown(?CancellationInterface $cancellation = null): bool
{
return true;
}
private function convertLogRecord(ReadableLogRecord $record): array
{
$spanContext = $record->getSpanContext();
return [
'timestamp' => $record->getTimestamp(),
'observed_timestamp' => $record->getObservedTimestamp(),
'severity_number' => $record->getSeverityNumber(),
'severity_text' => $record->getSeverityText(),
'body' => $record->getBody(),
'trace_id' => $spanContext !== null ? $spanContext->getTraceId() : '',
'span_id' => $spanContext !== null ? $spanContext->getSpanId() : '',
'trace_flags' => $spanContext !== null ? $spanContext->getTraceFlags() : null,
'attributes' => $record->getAttributes()->toArray(),
'dropped_attributes_count' => $record->getAttributes()->getDroppedAttributesCount(),
];
}
private function convertResource(ResourceInfo $resource): array
{
return [
'attributes' => $resource->getAttributes()->toArray(),
'dropped_attributes_count' => $resource->getAttributes()->getDroppedAttributesCount(),
];
}
private function scopeKey(InstrumentationScopeInterface $scope): string
{
return serialize([$scope->getName(), $scope->getVersion(), $scope->getSchemaUrl(), $scope->getAttributes()]);
}
private function convertInstrumentationScope(InstrumentationScopeInterface $scope): array
{
return [
'name' => $scope->getName(),
'version' => $scope->getVersion(),
'attributes' => $scope->getAttributes()->toArray(),
'dropped_attributes_count' => $scope->getAttributes()->getDroppedAttributesCount(),
'schema_url' => $scope->getSchemaUrl(),
'logs' => [],
];
}
}
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