Top 10 Examples of "kafka-node in functional component" in JavaScript
Dive into secure and efficient coding practices with our curated list of the top 10 examples showcasing 'kafka-node' in functional components in JavaScript. Our advanced machine learning engine meticulously scans each line of code, cross-referencing millions of open source libraries to ensure your implementation is not just functional, but also robust and secure. Elevate your React applications to new heights by mastering the art of handling side effects, API calls, and asynchronous operations with confidence and precision.
log('Using HighLevelConsumer');
consumer = new kafka.HighLevelConsumer(
client,
[
{
topic: 'test'
}
],
{
fromOffset: false,
groupId: uuid()
}
);
} else {
log('Using ConsumerGroup');
consumer = new kafka.ConsumerGroup(
{
host: process.env.ZOOKEEPER,
fromOffset: 'latest',
groupId: uuid()
},
['test']
);
}
consumer.on('error', function(err) {
log('Error occured in consumer:', err);
var span = instana.currentSpan();
span.disableAutoEnd();
// simulating asynchronous follow up steps with setTimeout and request-promise
setTimeout(function() {
request('http://127.0.0.1:' + agentPort).finally(function() {getKafkaConsumer = function(cohortName) {
console.log('Invoked getKC');
// Close any previous Kafka resources
if (consumer != null) consumer.close();
if (client != null) client.close();
// Get new Kafka resources
kafka_endpoint = process.env.KAFKA_ENDPOINT;
console.log('Will connect to kafka using '+kafka_endpoint);
client = new kafka.KafkaClient({ kafkaHost : kafka_endpoint });
console.log('Client connected to kafka using '+kafka_endpoint);
admin = new kafka.Admin(client);
console.log('Kafka Admin created - try to list topics...');
admin.listTopics((err, res) => { console.log('topics', res); });
console.log('Try to create Kafka Consumer...');
consumer = new kafka.Consumer( client, [ { topic: 'open-metadata.repository-services.cohort.'+cohortName+'.OMRSTopic', partition: 0 } ], { autoCommit: true });
consumer.on('error', function() { io.emit('cohort', 'does not exist - please try a different cohort name')});
consumer.on('message', function(message) {
try {
var data = JSON.parse(message.value);
io.emit('event', data); console.log(data);
}
catch (e) {
if (e instanceof SyntaxError) {
console.log('Could not make sense of JSON - skipping this event');
} else {
console.log('Encountered (non-syntax) error in JSON.parse - skipping this event');
}function setKafka(){
/// setting up kafka consummer
console.log("Setting up Kafka clients");
Consumer = kafka.Consumer;
client = new kafka.Client('zk:2181/');
consumer = new Consumer(
client,
// payloads
[{ topic: 'speedd-fraud-actions', partition: 0, offset: 0 },
{ topic: 'speedd-fraud-out-events', partition: 0, offset: 0 }
],
// options
{fromOffset: true} // true = read messages from beginning
);
//// Setting up Kafka Producer
Producer = kafka.Producer;
producer = new Producer(client);
producer.on('ready', function () {function setKafka(){
/// setting up kafka consummer
console.log("Setting up Kafka clients");
Consumer = kafka.Consumer;
client = new kafka.Client('localhost:2181/');
consumer = new Consumer(
client,
// payloads
[{ topic: 'speedd-traffic-actions', partition: 0, offset: 0 },
{ topic: 'speedd-traffic-out-events', partition: 0, offset: 0 }
],
// options
{fromOffset: true} // true = read messages from beginning
);
//// Setting up Kafka Producer
Producer = kafka.Producer;
producer = new Producer(client);
payloads = [
{ topic: 'speedd-out-events', messages: 'THIS IS THE NEW APP', partition: 0 }function setKafka(){
/// setting up kafka consummer
console.log("Setting up Kafka clients");
Consumer = kafka.Consumer;
client = new kafka.Client('localhost:2181/');
consumer = new Consumer(
client,
// payloads
[{ topic: 'speedd-fraud-actions', partition: 0, offset: 0 },
{ topic: 'speedd-fraud-out-events', partition: 0, offset: 0 },
{ topic: 'speedd-fraud-in-events', partition: 0, offset: 0 }
],
// options
{fromOffset: true} // true = read messages from beginning
);
//// Setting up Kafka Producer
Producer = kafka.Producer;
producer = new Producer(client);
payloads = [function initializeKafkaConsumer(attempt) {
try {
console.log("Try to initialize Kafka Client and Consumer, attempt " + attempt);
var client = new kafka.Client(kafkaHost + ":"+zookeeperPort+"/")
console.log("created client for " + kafkaHost);
consumer = new Consumer(
client,
[],
{ fromOffset: true }
);
console.log("Kafka Client and Consumer initialized " + consumer);
// register the handler for any messages received by the consumer on any topic it is listening to.
consumer.on('message', function (message) {
console.log("event received");
handleEventBusMessage(message);
});
consumer.on('error', function (err) {
console.log("error in creation of Kafka consumer " + JSON.stringify(err));
console.log("Try again in 5 seconds");
setTimeout(initializeKafkaConsumer, 5000, attempt + 1);import logger from "../config/logger";
var kafka = require("kafka-node");
import envVariables from "../EnvironmentVariables";
const Producer = kafka.Producer;
let client;
// if (process.env.NODE_ENV === "development") {
// client = new kafka.Client();
client = new kafka.KafkaClient({ kafkaHost: envVariables.KAFKA_BROKER_HOST });
// console.log("local - ");
// } else {
// client = new kafka.KafkaClient({ kafkaHost: envVariables.KAFKA_BROKER_HOST });
// console.log("cloud - ");
// }
const producer = new Producer(client);
producer.on("ready", function() {
logger.info("Producer is ready");
});
producer.on("error", function(err) {
logger.error("Producer is in error state");
logger.error(err.stack || err);
});exports.consume = function (topic, cb) {
var options = {
autoCommit: false,
fromBeginning: true,
fetchMaxWaitMs: 1000,
fetchMaxBytes: 1024*1024
};
// use default partitions
var topics = [
{ topic: topic, partition: 0 },
{ topic: topic, partition: 1 }
];
var consumer = new kafka.Consumer(kafkaClient, topics, options);
var offset = new kafka.Offset(kafkaClient);
consumer.on('message', cb);
consumer.on('error', function (err) {
console.log(err);
throw err;
});
// recompute offset
consumer.on('offsetOutOfRange', function (topic) {
topic.maxNum = 2;
offset.fetch([topic], function (err, offsets) {
var min = Math.min.apply(null, offsets[topic.topic][topic.partition]);
consumer.setOffset(topic.topic, topic.partition, min);app.use(express.static(__dirname + '/public'));
app.use('/bower_components', express.static(__dirname + '/bower_components'));
app.get('/', function (req, res) {
res.sendFile(__dirname + '/index.html');
});
app.get('/historical', function (req, res) {
res.sendFile(__dirname + '/public/historical.html');
});
// Kafka Consumer Config
var zkserver = 'localhost:2181'; // Kafka Server Address
var kafka_client_id = 'reporting-layer';
var kafkaClient = new kafka.Client(zkserver,kafka_client_id);
var consumer = new kafka.Consumer(kafkaClient,[{ topic: 'bounceRate' },{ topic: 'averageTime' },{ topic: 'usersPerCategory' },{ topic: 'hitsByMarketingChannels' },{ topic: 'pagesByBounceRate' }],{autoCommit: true});
//cassandra configurations
var client = new cassandra.Client({contactPoints: ['localhost'], keyspace: 'rajsarka'});
// Define action to take when a websocket connection is established
io.on('connection', function (socket) {
console.log("A client is connected.");
//fetch conversion summary data from cassandra
socket.on('fetch-conversionSummaryChartData',function(query){
client.execute(query, function (err, result) {
if(err){
console.log(err);
}
console.log('executing query: ' + query);
console.log('processing data');function setKafka(){
/// setting up kafka consummer
console.log("Setting up Kafka clients");
Consumer = kafka.Consumer;
client = new kafka.Client(zk);
offset = new kafka.Offset(client);
offset.fetch([
{ topic: 'speedd-fraud-out-events', partition: 0, time: -1, maxNum: 1 }
], function (err, data) {
if(err != null){
console.error("Error: " + JSON.stringify(err));
return;
}
console.log("Offset data: " + JSON.stringify(data));
var outEventsOffset = data['speedd-fraud-out-events'][0][0];
console.log("Events offset: " + outEventsOffset);
consumer = new Consumer(