examples/node/src/basic/producer.ts

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import { Client, Partitioning } from "apache-iggy";
import debug from "debug";
import {
  PARTITION_COUNT,
  BATCHES_LIMIT,
  MESSAGES_PER_BATCH,
  initSystem,
} from "../utils";

const log = debug("iggy:examples:basic-producer");

function parseArgs() {
  console.log = (...args) => process.stdout.write(args.join(" ") + "\n");
  const args = process.argv.slice(2);
  const connectionString = args[0] || "iggy+tcp://iggy:iggy@127.0.0.1:8090";

  if (args.length > 0 && (args[0] === "-h" || args[0] === "--help")) {
    log("Usage: node producer.js [connection_string]");
    log("Example: node producer.js iggy+tcp://iggy:iggy@127.0.0.1:8090");
    process.exit(0);
  }

  return { connectionString };
}

async function produceMessages(
  client: Client,
  stream: Awaited<ReturnType<typeof initSystem>>["stream"],
  topic: Awaited<ReturnType<typeof initSystem>>["topic"],
) {
  const interval = 500; // 500 milliseconds
  log(
    "Messages will be sent to stream: %d, topic: %d, partition: %d with interval %d ms.",
    interval,
  );

  let currentId = 0;
  let sentBatches = 0;

  for (; sentBatches < BATCHES_LIMIT; ) {
    const messages = Array.from({ length: MESSAGES_PER_BATCH }).map(() => {
      currentId++;
      return {
        //optional message id can be used for deduplication
        id: currentId,
        //optional headers can be used to store metadata
        headers: [],
        payload: `message-${currentId}`,
      };
    });

    try {
      await client.message.send({
        streamId: stream.id,
        topicId: topic.id,
        messages,
        partition: Partitioning.PartitionId(
          topic.partitions[Math.floor(Math.random() * topic.partitions.length)]
            .id,
        ),
      });
    } catch (error) {
      log("Error sending messages: %o", error);
      log(
        "This might be due to server version compatibility. The stream and topic creation worked successfully.",
      );
      log(
        "Please check the Iggy server version and ensure it supports the SendMessages command.",
      );
    } finally {
      sentBatches++;
      log("Sent messages: %o", messages);
      await new Promise((resolve) => setTimeout(resolve, interval));
    }
  }

  log("Sent %d batches of messages, exiting.", sentBatches);
}
async function cleanup(
  client: Client,
  streamId: number | string,
  topicId: number | string,
) {
  log(
    "Cleaning up: deleting topic ID %d and stream ID %d...",
    topicId,
    streamId,
  );
  try {
    await client.topic.delete({
      streamId: streamId,
      topicId: topicId,
      partitionsCount: PARTITION_COUNT,
    });
    log("Topic deleted successfully.");
  } catch (error) {
    log("Error deleting topic: %o", error);
  }

  try {
    await client.stream.delete({ streamId });
    log("Stream deleted successfully.");
  } catch (error) {
    log("Error deleting stream: %o", error);
  }
}

async function main() {
  const args = parseArgs();

  log("Using connection string: %s", args.connectionString);

  // Parse connection string (simplified parsing for this example)
  const url = new URL(args.connectionString.replace("iggy+tcp://", "http://"));
  const host = url.hostname;
  const port = parseInt(url.port) || 8090;
  const username = url.username || "iggy";
  const password = url.password || "iggy";
  const client = new Client({
    transport: "TCP",
    options: {
      port,
      host,
      keepAlive: true,
    },
    reconnect: {
      enabled: true,
      interval: 5000,
      maxRetries: 5,
    },
    heartbeatInterval: 5000,
    credentials: { username, password },
  });
  let streamId = null;
  // iggy will create topic with id 0 by default
  let topicId = 0;
  try {
    log("Basic producer has started, selected transport: TCP");
    log("Connecting to Iggy server...");
    // Client connects automatically when first command is called
    log("Connected successfully.");
    // Login will be handled automatically by the client on first command

    const { stream, topic } = await initSystem(client);
    streamId = stream.id;
    topicId = topic.id;

    //ping before producing messages
    const pong = await client.system.ping();
    log("Ping successful.", pong);

    const stats = await client.system.getStats();
    log("System stats: %o", stats);

    log("Stream ID: %s, Topic ID: %s", streamId, topicId);
    await produceMessages(client, stream, topic);
  } catch (error) {
    log("Error in main: %o", error);
    await client.destroy();
    log("Disconnected from server.");
    process.exitCode = 1;
  } finally {
    if (streamId) {
      await cleanup(client, streamId, topicId);
    }
    await client.destroy();
    log("Disconnected from server.");
  }
}

await main();