[jaeger] Added WithBatchMaxCount as an option (#931)

exporters/trace/jaeger/jaeger.go

@@ -42,6 +42,9 @@ type options struct {
 	// BufferMaxCount defines the total number of traces that can be buffered in memory
 	BufferMaxCount int
 
+	// BatchMaxCount defines the maximum number of spans sent in one batch
+	BatchMaxCount int
+
 	Config *sdktrace.Config
 
 	// RegisterGlobal is set to true if the trace provider of the new pipeline should be
@@ -65,6 +68,13 @@ func WithBufferMaxCount(bufferMaxCount int) Option {
 	}
 }
 
+// WithBatchMaxCount defines the maximum number of spans in one batch
+func WithBatchMaxCount(batchMaxCount int) Option {
+	return func(o *options) {
+		o.BatchMaxCount = batchMaxCount
+	}
+}
+
 // WithSDK sets the SDK config for the exporter pipeline.
 func WithSDK(config *sdktrace.Config) Option {
 	return func(o *options) {
@@ -134,6 +144,11 @@ func NewRawExporter(endpointOption EndpointOption, opts ...Option) (*Exporter, e
 		bundler.BufferedByteLimit = o.BufferMaxCount
 	}
 
+	// The default value bundler uses is 10, increase to send larger batches
+	if o.BatchMaxCount != 0 {
+		bundler.BundleCountThreshold = o.BatchMaxCount
+	}
+
 	e.bundler = bundler
 	return e, nil
 }