Convert datadog-metadata subsegment's start and end times from milliseconds to seconds (#236)

convert dd subsegment start and end times to seconds

Author: DylanLovesCoffee

src/trace/context.spec.ts

@@ -839,7 +839,7 @@ describe("extractTraceContext", () => {
     const sentMessage = sentSegment.toString();
     expect(sentMessage).toMatchInlineSnapshot(`
       "{\\"format\\": \\"json\\", \\"version\\": 1}
-      {\\"id\\":\\"11111\\",\\"trace_id\\":\\"1-5e272390-8c398be037738dc042009320\\",\\"parent_id\\":\\"94ae789b969f1cc5\\",\\"name\\":\\"datadog-metadata\\",\\"start_time\\":1487076708000,\\"end_time\\":1487076708000,\\"type\\":\\"subsegment\\",\\"metadata\\":{\\"datadog\\":{\\"trace\\":{\\"parent-id\\":\\"797643193680388251\\",\\"sampling-priority\\":\\"2\\",\\"trace-id\\":\\"4110911582297405551\\"}}}}"
+      {\\"id\\":\\"11111\\",\\"trace_id\\":\\"1-5e272390-8c398be037738dc042009320\\",\\"parent_id\\":\\"94ae789b969f1cc5\\",\\"name\\":\\"datadog-metadata\\",\\"start_time\\":1487076708,\\"end_time\\":1487076708,\\"type\\":\\"subsegment\\",\\"metadata\\":{\\"datadog\\":{\\"trace\\":{\\"parent-id\\":\\"797643193680388251\\",\\"sampling-priority\\":\\"2\\",\\"trace-id\\":\\"4110911582297405551\\"}}}}"
     `);
   });
   it("skips adding datadog metadata to x-ray when daemon isn't present", () => {
@@ -889,7 +889,7 @@ describe("extractTraceContext", () => {
     const sentMessage = sentSegment.toString();
     expect(sentMessage).toMatchInlineSnapshot(`
       "{\\"format\\": \\"json\\", \\"version\\": 1}
-      {\\"id\\":\\"11111\\",\\"trace_id\\":\\"1-5e272390-8c398be037738dc042009320\\",\\"parent_id\\":\\"94ae789b969f1cc5\\",\\"name\\":\\"datadog-metadata\\",\\"start_time\\":1487076708000,\\"end_time\\":1487076708000,\\"type\\":\\"subsegment\\",\\"metadata\\":{\\"datadog\\":{\\"root_span_metadata\\":{\\"step_function.execution_id\\":\\"fb7b1e15-e4a2-4cb2-963f-8f1fa4aec492\\",\\"step_function.retry_count\\":2,\\"step_function.state_machine_arn\\":\\"arn:aws:states:us-east-1:601427279990:stateMachine:HelloStepOneStepFunctionsStateMachine-z4T0mJveJ7pJ\\",\\"step_function.state_machine_name\\":\\"my-state-machine\\",\\"step_function.step_name\\":\\"step-one\\"}}}}"
+      {\\"id\\":\\"11111\\",\\"trace_id\\":\\"1-5e272390-8c398be037738dc042009320\\",\\"parent_id\\":\\"94ae789b969f1cc5\\",\\"name\\":\\"datadog-metadata\\",\\"start_time\\":1487076708,\\"end_time\\":1487076708,\\"type\\":\\"subsegment\\",\\"metadata\\":{\\"datadog\\":{\\"root_span_metadata\\":{\\"step_function.execution_id\\":\\"fb7b1e15-e4a2-4cb2-963f-8f1fa4aec492\\",\\"step_function.retry_count\\":2,\\"step_function.state_machine_arn\\":\\"arn:aws:states:us-east-1:601427279990:stateMachine:HelloStepOneStepFunctionsStateMachine-z4T0mJveJ7pJ\\",\\"step_function.state_machine_name\\":\\"my-state-machine\\",\\"step_function.step_name\\":\\"step-one\\"}}}}"
     `);
   });
 });

src/trace/context.ts

@@ -134,7 +134,9 @@ export function generateXraySubsegment(key: string, metadata: Record<string, any
     logDebug("couldn't parse xray trace header from env");
     return;
   }
-  const time = Date.now();
+
+  // Convert from milliseconds to seconds
+  const time = Date.now() * 0.001;
 
   return JSON.stringify({
     id: randomBytes(8).toString("hex"),