What is Google Pub/Sub?

Google Pub/Sub offered by Google Cloud Platform (GCP), is a message-based publish-subscribe service. This system offers a reliable, asynchronous and scalable messaging infrastructure between applications. Google Pub/Sub was developed to regulate data flow and enable communication between microservices, especially in large-scale systems.

In this article, we will examine in detail what Google Pub/Sub is, how it works, its advantages and areas of use.

What is Google Pub/Sub?

Google Pub/Sub, a topic by a sender (publisher) of messages (Topic) is a communication system that ensures the publication and reception of these messages by one or more recipients (subscribers).

This system works with the following components:

• Publisher: Sends messages to a topic.
• Topic: It is a virtual channel that allows messages to be transmitted.
• Subscriber (Subscriber): It takes messages from a subject and processes them.
• Subscription: Defines the linking of a specific subscriber to a topic.

How Google Pub/Sub Works

Google Pub/Sub works with a publishing and subscription model. This model allows publishers and subscribers to communicate without being directly connected to each other.

Working Principle:

1. Posting a Message:
   The publisher sends a message to a topic. Messages are stored reliably by the system.
2. Create Subscription:
   A subscriber creates a subscription to a specific topic. Subscription defines how a subscriber receives messages (for example, instantly or later).
3. Message Delivery:
   Messages, to subscribers push (pussione) or pull Delivered with model:
   • Push Mode: Messages are automatically sent to a URL specified by the subscriber.
   • Pull-modus: Subscribers manually pull messages from the system.
4. Message Processing and Validation:
   The subscriber processes the message after receiving it, and the system confirms the successful receipt of this message. If no verification is made, the message will be sent again.

Google Pub/Sub Advantages

Google Pub/Sub offers many advantages in modern application development processes:

1. Asynchronous Communication

• The publisher and subscribers are not dependent on each other, which allows the systems to operate independently.
• Messages can be processed sequentially without scheduling issues.

2. High Scalability

• Google Pub/Sub is designed to manage large-scale data flows.
• It maintains its performance even in high traffic conditions and supports unlimited message flow.

3. Ideal for Distributed Systems

• Provides reliable communication between components in systems operating with microservice architecture.
• Apps can exchange messages, even if they are on the same system or in different regions.

4. Reliable Message Delivery

• Google Pub/Sub prevents messages from being lost. Messages are stored until they are processed by the recipient and sent again if necessary.

5. Flexible Delivery Models

• Push-modus and Pull-modus Gains flexibility in message delivery with its options.
• The delivery method can be selected to suit the application needs.

6. Real-Time Processing

• It allows data to be transmitted in real time. This is ideal for scenarios such as analyzing streaming data.

7. Ease of Integration

• Easily integrates with other services in the Google Cloud ecosystem. For example:
  • Google Cloud Functions (event triggering)
  • Google BigQuery (data analytics)

Google Pub/Sub Uses

Google Pub/Sub can be used in a wide variety of scenarios. Here are some of the uses that stand out:

1. Real-Time Data Flow

• Used for real-time analysis of sensor data or user activities.
• Example: Instant processing of data from IoT devices.

2. Micro Service Communication

• In systems with a microservice architecture, it allows the exchange of messages between different services.
• Example: A payment system can send inventory information to an inventory management system.

3. Log and Track

• It can be used for collecting and monitoring system logs.
• Example: Real-time detection and reporting of application errors.

4. Event-Based Processing

• When an event is triggered (for example, loading a file), it is used to execute a function.
• Example: When a new file is uploaded, start a process that processes that file.

5. E-commerce and Notification Systems

• It is used to send emails or notifications to customers.
• Example: When an order is confirmed, an automatic notification is sent to the customer.

Frequently Asked Questions about Google Pub/Sub

1. How to Make Pub/Sub Charges

Google Pub/Sub is charged based on the amount of usage. Fees are usually set according to the following parameters:

• Number of messages processed.
• Size of messages.
• Message retention time.

2. What Programming Languages Does Pub/Sub Support?

Google Pub/Sub offers SDK and API support for many programming languages such as Python, Java, Go, Node.js.

3. Will the message disappear?

Google Pub/Sub securely stores messages until subscriber verification is done to prevent messages from being lost.

Similar Systems to Google Pub/Sub

Other messaging systems similar to Google Pub/Sub include:

• Apache Kafka: It is used for large-scale data flows and real-time analytics.
• Amazon SNS (Simple Notification Service): It is AWS's publishing-subscription service.
• RabbitMQ: It is a tool that provides message queuing and communication infrastructure.

Pub/Sub stands out compared to other solutions thanks to the advantage of integration with Google Cloud.

Google Pub/Sub is an ideal tool for regulating data flow in modern applications and providing communication between microservices. Thanks to its reliability, scalability and flexibility, it offers a powerful solution for real-time data flow and distributed systems. If you want to integrate Google Pub/Sub or Google Cloud services into your projects, Komtaş Information Management We are ready to support you with our expert staff. Contact us for more information!

‍