1 files changed, 56 insertions, 0 deletions
diff --git a/src/payment/index.js b/src/payment/index.js
new file mode 100644
index 0000000..f9b9fcb
--- /dev/null
+++ b/src/payment/index.js
@@ -0,0 +1,56 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+const grpc = require('@grpc/grpc-js')
+const protoLoader = require('@grpc/proto-loader')
+const health = require('grpc-js-health-check')
+const opentelemetry = require('@opentelemetry/api')
+
+const charge = require('./charge')
+const logger = require('./logger')
+
+async function chargeServiceHandler(call, callback) {
+  const span = opentelemetry.trace.getActiveSpan();
+
+  try {
+    const amount = call.request.amount
+    span?.setAttributes({
+      'app.payment.amount': parseFloat(`${amount.units}.${amount.nanos}`).toFixed(2)
+    })
+    logger.info({ request: call.request }, "Charge request received.")
+
+    const response = await charge.charge(call.request)
+    callback(null, response)
+
+  } catch (err) {
+    logger.warn({ err })
+
+    span?.recordException(err)
+    span?.setStatus({ code: opentelemetry.SpanStatusCode.ERROR })
+    callback(err)
+  }
+}
+
+async function closeGracefully(signal) {
+  server.forceShutdown()
+  process.kill(process.pid, signal)
+}
+
+const otelDemoPackage = grpc.loadPackageDefinition(protoLoader.loadSync('demo.proto'))
+const server = new grpc.Server()
+
+server.addService(health.service, new health.Implementation({
+  '': health.servingStatus.SERVING
+}))
+
+server.addService(otelDemoPackage.oteldemo.PaymentService.service, { charge: chargeServiceHandler })
+
+server.bindAsync(`0.0.0.0:${process.env['PAYMENT_PORT']}`, grpc.ServerCredentials.createInsecure(), (err, port) => {
+  if (err) {
+    return logger.error({ err })
+  }
+
+  logger.info(`payment gRPC server started on port ${port}`)
+})
+
+process.once('SIGINT', closeGracefully)
+process.once('SIGTERM', closeGracefully)