如何在Cassandra中为NodeJS的每个插入创建事件？

Question

I know we use NodeJS with Cassandra using DataStax , but is it possible to create an event in Cassandra for every inserts that is done? We can create triggers in Cassandra but it will not update external system.

Answer 1

There isn't any event builtin the driver that could help you in this case. You can create an event emitter:

var emitter = new events.EventEmitter();

const query = 'INSERT INTO ...';
client.execute(query, params, { prepare: true }, function (err) {
  // ...
  emitter.emit('insert', err);
});

Then, you can listen to the 'insert' event.

emitter.on('insert', function insertEventHandler(err) {
  // ...
});