Is MongoDB event-driven?
Is MongoDB event-driven?
MongoDB is at the center of our event driven architecture. All updates are committed to the system of record – for example, when a new property comes onto the market – which then uses the Amazon Web Services (AWS) SNS push notification and SQS message queue services to publish the update to all the other product pods.
What is event-driven in Java?
In Java GUI applications, a user’s interaction with a component is called an event. As a programmer, you can write code to do something after these events. This is why Java is referred to as being event-driven. An application can listen for updates and changes via event listeners.
What is event driven architecture example?
An Event-Driven Architecture for data and applications is a modern design approach centered around data that describes “events” (i.e., something that just happened). Examples of events include the taking of a measurement, the pressing of a button, or the swiping of a credit card.
What is event-driven application?
An event-driven application is a computer program that is written to respond to actions generated by the user or the system. As such, events include both user-generated actions like mouse clicks and keystrokes and system-generated events such as program loading.
Is MongoDB good for analytics?
MongoDB is currently working on improving large-scale analytics features that will help users to perform analyses within the platform and converting data to charts, as well as a parallelized query execution engine and column-store format, which will speed up analytics by storing the data in a more efficiently.
What are the characteristics of event-driven programming?
Event-Driven Programming Features
- Service Oriented.
- Time Driven.
- Event Handlers.
- Trigger Functions.
- Simplicity of Programming and Ease of Development.
- Compare Event Driven Programming with Object-oriented Programming (OOP)
Where is event-driven architecture used?
You can use an event-driven architecture to coordinate systems between teams operating in and deploying across different regions and accounts. By using an event router to transfer data between systems, you can develop, scale, and deploy services independently from other teams.
How do you implement event-driven?
These following six steps have been proven to make the journey to event-driven architecture faster, smoother and less risky in many real-world implementations.
- Step 1: Culture, Awareness, and Intent.
- Step 2: Identify Real Time Candidates.
- Step 3: Build Your Eventing Foundation.
What do you need to know about MongoDB triggers?
What you are thinking of sounds a lot like triggers. MongoDB does not have any support for triggers, however some people have “rolled their own” using some tricks. The key here is the oplog. When you run MongoDB in a Replica Set, all of the MongoDB actions are logged to an operations log (known as the oplog).
How to listen for changes to a MongoDB collection?
When you run MongoDB in a Replica Set, all of the MongoDB actions are logged to an operations log (known as the oplog). The oplog is basically just a running list of the modifications made to the data. Replicas Sets function by listening to changes on this oplog and then applying the changes locally. Does this sound familiar?
How does the OpLog work in MongoDB?
MongoDB does not have any support for triggers, however some people have “rolled their own” using some tricks. The key here is the oplog. When you run MongoDB in a Replica Set, all of the MongoDB actions are logged to an operations log (known as the oplog). The oplog is basically just a running list of the modifications made to the data.
What does a capped collection look like in MongoDB?
MongoDB has what is called capped collections and tailable cursors that allows MongoDB to push data to the listeners. A capped collection is essentially a collection that is a fixed size and only allows insertions. Here’s what it would look like to create one: