exthos/examples/llapis/generate.stdout.javascript_add.start.js

stream processing in nodejs using the power of golang

import * as exthos from "../../dist/index.js";

let engine = new exthos.Engine(
  { metrics: { json_api: {} } },
  { isLocal: process.env["isLocal"] ? process.env["isLocal"] === "true" : true }
);
engine.useDefaultEventHandler({
  "engine.fatal": (eventObj) => {
    console.log("\nTest EXITED with CODE=1", JSON.stringify(eventObj));
    process.exit(1);
  },
});

let stream1 = new exthos.Stream({
  input: {
    generate: {
      mapping: `root = count("gen")`,
      count: 2,
    },
  },
  pipeline: {
    processors: [
      {
        bloblang: `meta = {"a": 1}`,
      },
      {
        log: {
          message: '${! ">>all_preall>>" + content() + meta().string()}',
        },
      },
      {
        javascript: `
                msg.content = msg.content + 100
                msg.meta = {...msg.meta, ...{"b":2}}
                 `,
      },
      {
        javascript: `
                msg.content = msg.content + 100
                msg.meta = {...msg.meta, ...{"c":3}}
                 `,
      },
      {
        log: {
          message: '${! ">>all_postall>>" + content() + meta().string()}',
        },
      },
    ],
  },
  output: { stdout: {} },
});
engine.add(stream1);
await engine.start();