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Lambda calling lambda with trace id
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| // Lambda 1 - arv-foo | |
| // Synchronous fn that will back API Gateway endpoint. | |
| const AWS = require('aws-sdk'); | |
| const lambda = new AWS.Lambda(); | |
| const getRandomInt = (max) => Math.floor(Math.random() * Math.floor(max)); | |
| exports.handler = async (event, context) => { | |
| console.log("event:", event) | |
| const traceId = (event.headers || {})["x-amzn-trace-id"] || getRandomInt(999999); | |
| const barPayload = { | |
| FunctionName: "arv-bar", | |
| Payload: JSON.stringify({ | |
| caller: "Called from arv-foo", | |
| headers: { | |
| "x-amzn-trace-id": traceId, | |
| }, | |
| }), | |
| InvocationType: "Event", | |
| } | |
| const barResponse = await lambda.invoke(barPayload).promise(); | |
| console.log('arv-bar response:', barResponse); | |
| const response = { | |
| statusCode: 200, | |
| body: JSON.stringify({ | |
| message: 'Lambda arv-foo returning response', | |
| traceId, | |
| }), | |
| }; | |
| return response; | |
| }; | |
| // Lambda 2 - arv-bar | |
| // Asynchronous worker fn that will do some hrd work. | |
| exports.handler = async (event) => { | |
| console.log('arv-bar event:', event); | |
| await new Promise(r => setTimeout(r, 2000)); | |
| const response = { | |
| statusCode: 200, | |
| body: JSON.stringify('Lambda arv-bar finished.'), | |
| }; | |
| return response; | |
| }; | |
| // Lambda 2 clouldwatch logs example: | |
| 2020-09-08T14:21:18.219Z 62b1bc63-2862-43a6-b0e6-44f1633b2e64 INFO arv-bar event: { | |
| caller: 'Called from arv-foo', | |
| headers: { 'x-amzn-trace-id': 917093 } | |
| } |
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