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Cutting Through API Complexity: A Guide to GraphQL

Have you ever felt frustrated fetching data from an API and ending up with a bunch of information you don’t need? Enter GraphQL, a game-changer in the world of server-side APIs! This blog post takes you on a journey to understand GraphQL, from its core concepts to practical development steps.

What is GraphQL?

Imagine an API that caters to your specific needs. With GraphQL, that’s exactly what you get! It’s a querying language specifically designed for server-side applications. There will be a single API endpoint. Users can request the required details and the system will send a response as per the requests with a precise answer.

The Building Blocks of GraphQL:

Everything in GraphQL revolves around three key concepts: Schema, Queries, and Mutations. 

Schema: Think of the schema as the blueprint for your data. It defines the main structure of the data that can be queried or modified, ensuring consistency and clarity for developers. The schema structure is created using fields and types.

Queries: These are used to fetch the data from the GraphQL API. You define the specific data you need in a structured format, and GraphQL gets it for you efficiently. This is a similar use case like a “GET” request in RESTful APIs.

Mutations: Need to insert, update, or delete data? Mutations are your answer. They are used to modify (Insert, Update, Delete) the data in the GraphQL API. This is a similar use case like “POST, PUT, PATCH, or DELETE” requests in RESTful APIs.

Understanding the GraphQL API Architecture:

Architecture plays a crucial role in achieving efficiency. But what exactly goes on behind the scenes? Let’s break it down!

The above diagram represents the 3-tier architecture diagram of GraphQL. Here’s what’s happening: 

  • Clients send the requests with only the required parameters in the query string using JSON format 
  • GraphQL server handles the requests with appropriate actions and interaction with the data layer, 
  • After that send back the responses with only requested data as payload JSON to the Clients for further process.

The Role of GraphiQL IDE: 

GraphiQL is a graphical interface specifically designed for GraphQL. It allows you to build, test, and debug your queries and mutations in a user-friendly environment. 

Benefits of GraphQL:

  • Precision is key: Getting exactly what we need is the primary goal for GraphQL. It delivers only the data your application needs for faster performance.
  • One request, many answers: Get multiple distinct details in a single request instead of sending multiple requests.  
  • Structure for clarity: Structured type referencing request and response detail, making it easier for developers to understand and maintain the API.
  • Future-proof flexibility:  Updates to the API become a breeze with GraphQL. You can introduce new features without depending on version control management, ensuring smooth operation. 
  • No More Data Juggling: Easily combine multiple data sources in a single endpoint.

REST vs GraphQL:

REST vs GraphQL:

In a traditional REST API, you might need to use multiple endpoints for different requests. 

With GraphQL, a single request with a well-defined structure retrieves all the data in one go, saving time and resources.

How to get started with GraphQL?

If you are considering the technology and framework to build a web application using GraphQL, you can choose Express.js.

Development Flow Diagram in Express:
Development Flow Diagram in Express:

The above diagram shows the flows that give you an overall idea to develop a project using GraphQL. If you are a beginner, please check the following link

Server-Side Application:

  • Include two npm packages (graphql-http and graphql) to start with GraphQL.
  • Build the folder structure to start the development to define the GraphQL schema.
  • Create the base folders in the following manner “/src/schema”.
  • The concept is to build module-wise schema, so it’s better to create individual folders for each module (i.e. User, Product, Order, Payment, etc.).
  • Each module folder should have 3 files (index.js, typedefs.js, and resolvers.js).
  • Use the ‘index.js’ to combine the integrations of ‘typedefs.js’ and ‘resolvers.js’ to make it centralized for that particular module.
  • Use ‘typedefs.js’ to define the structure of queries and mutations for that particular module.
  • Use ‘resolvers.js’ to build the logic to manipulate queries and mutations for that particular module.
  • Run the project
  • Test and debug the integrated API using GraphiQL IDE

Client-Side Application:

Once your server-side is set up, it’s time to connect your application:

  • From the client-side application, Call API from a single endpoint (/graphql) and send the query string within the ‘data’ parameter as a request to get the response for that specified query string.
  • Get the response as JSON payload and process it for further execution.

Conclusion: 

GraphQL is a powerful tool that simplifies API development. By offering a more efficient and flexible approach to data retrieval, it empowers developers to build cleaner, faster, and future-proof applications.

Whether you’re a seasoned developer or just starting your journey, GraphQL is worth exploring. Its clear structure, streamlined data fetching, and ever-growing community make it a valuable asset for your development toolbox.

Additional Resources:

Folder Structure and Integration Reference: you can check the following link.

Video Reference on Integrations, you can check the following link.

About the Author:

Sudipta Mal is a Technical Architect at Mantra Labs. His passion goes beyond his technical expertise; he’s also fascinated by experimenting with new technologies, which further fuels his creativity and problem-solving abilities.

Further Readings: Beego is Backend Developers’ Fav for 2024; but why?

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Lake, Lakehouse, or Warehouse? Picking the Perfect Data Playground

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In 1997, the world watched in awe as IBM’s Deep Blue, a machine designed to play chess, defeated world champion Garry Kasparov. This moment wasn’t just a milestone for technology; it was a profound demonstration of data’s potential. Deep Blue analyzed millions of structured moves to anticipate outcomes. But imagine if it had access to unstructured data—Kasparov’s interviews, emotions, and instinctive reactions. Would the game have unfolded differently?

This historic clash mirrors today’s challenge in data architectures: leveraging structured, unstructured, and hybrid data systems to stay ahead. Let’s explore the nuances between Data Warehouses, Data Lakes, and Data Lakehouses—and uncover how they empower organizations to make game-changing decisions.

Deep Blue’s triumph was rooted in its ability to process structured data—moves on the chessboard, sequences of play, and pre-defined rules. Similarly, in the business world, structured data forms the backbone of decision-making. Customer transaction histories, financial ledgers, and inventory records are the “chess moves” of enterprises, neatly organized into rows and columns, ready for analysis. But as businesses grew, so did their need for a system that could not only store this structured data but also transform it into actionable insights efficiently. This need birthed the data warehouse.

Why was Data Warehouse the Best Move on the Board?

Data warehouses act as the strategic command centers for enterprises. By employing a schema-on-write approach, they ensure data is cleaned, validated, and formatted before storage. This guarantees high accuracy and consistency, making them indispensable for industries like finance and healthcare. For instance, global banks rely on data warehouses to calculate real-time risk assessments or detect fraud—a necessity when billions of transactions are processed daily, tools like Amazon Redshift, Snowflake Data Warehouse, and Azure Data Warehouse are vital. Similarly, hospitals use them to streamline patient care by integrating records, billing, and treatment plans into unified dashboards.

The impact is evident: according to a report by Global Market Insights, the global data warehouse market is projected to reach $30.4 billion by 2025, driven by the growing demand for business intelligence and real-time analytics. Yet, much like Deep Blue’s limitations in analyzing Kasparov’s emotional state, data warehouses face challenges when encountering data that doesn’t fit neatly into predefined schemas.

The question remains—what happens when businesses need to explore data outside these structured confines? The next evolution takes us to the flexible and expansive realm of data lakes, designed to embrace unstructured chaos.

The True Depth of Data Lakes 

While structured data lays the foundation for traditional analytics, the modern business environment is far more complex, organizations today recognize the untapped potential in unstructured and semi-structured data. Social media conversations, customer reviews, IoT sensor feeds, audio recordings, and video content—these are the modern equivalents of Kasparov’s instinctive reactions and emotional expressions. They hold valuable insights but exist in forms that defy the rigid schemas of data warehouses.

Data lake is the system designed to embrace this chaos. Unlike warehouses, which demand structure upfront, data lakes operate on a schema-on-read approach, storing raw data in its native format until it’s needed for analysis. This flexibility makes data lakes ideal for capturing unstructured and semi-structured information. For example, Netflix uses data lakes to ingest billions of daily streaming logs, combining semi-structured metadata with unstructured viewing behaviors to deliver hyper-personalized recommendations. Similarly, Tesla stores vast amounts of raw sensor data from its autonomous vehicles in data lakes to train machine learning models.

However, this openness comes with challenges. Without proper governance, data lakes risk devolving into “data swamps,” where valuable insights are buried under poorly cataloged, duplicated, or irrelevant information. Forrester analysts estimate that 60%-73% of enterprise data goes unused for analytics, highlighting the governance gap in traditional lake implementations.

Is the Data Lakehouse the Best of Both Worlds?

This gap gave rise to the data lakehouse, a hybrid approach that marries the flexibility of data lakes with the structure and governance of warehouses. The lakehouse supports both structured and unstructured data, enabling real-time querying for business intelligence (BI) while also accommodating AI/ML workloads. Tools like Databricks Lakehouse and Snowflake Lakehouse integrate features like ACID transactions and unified metadata layers, ensuring data remains clean, compliant, and accessible.

Retailers, for instance, use lakehouses to analyze customer behavior in real time while simultaneously training AI models for predictive recommendations. Streaming services like Disney+ integrate structured subscriber data with unstructured viewing habits, enhancing personalization and engagement. In manufacturing, lakehouses process vast IoT sensor data alongside operational records, predicting maintenance needs and reducing downtime. According to a report by Databricks, organizations implementing lakehouse architectures have achieved up to 40% cost reductions and accelerated insights, proving their value as a future-ready data solution.

As businesses navigate this evolving data ecosystem, the choice between these architectures depends on their unique needs. Below is a comparison table highlighting the key attributes of data warehouses, data lakes, and data lakehouses:

FeatureData WarehouseData LakeData Lakehouse
Data TypeStructuredStructured, Semi-Structured, UnstructuredBoth
Schema ApproachSchema-on-WriteSchema-on-ReadBoth
Query PerformanceOptimized for BISlower; requires specialized toolsHigh performance for both BI and AI
AccessibilityEasy for analysts with SQL toolsRequires technical expertiseAccessible to both analysts and data scientists
Cost EfficiencyHighLowModerate
ScalabilityLimitedHighHigh
GovernanceStrongWeakStrong
Use CasesBI, ComplianceAI/ML, Data ExplorationReal-Time Analytics, Unified Workloads
Best Fit ForFinance, HealthcareMedia, IoT, ResearchRetail, E-commerce, Multi-Industry
Conclusion

The interplay between data warehouses, data lakes, and data lakehouses is a tale of adaptation and convergence. Just as IBM’s Deep Blue showcased the power of structured data but left questions about unstructured insights, businesses today must decide how to harness the vast potential of their data. From tools like Azure Data Lake, Amazon Redshift, and Snowflake Data Warehouse to advanced platforms like Databricks Lakehouse, the possibilities are limitless.

Ultimately, the path forward depends on an organization’s specific goals—whether optimizing BI, exploring AI/ML, or achieving unified analytics. The synergy of data engineering, data analytics, and database activity monitoring ensures that insights are not just generated but are actionable. To accelerate AI transformation journeys for evolving organizations, leveraging cutting-edge platforms like Snowflake combined with deep expertise is crucial.

At Mantra Labs, we specialize in crafting tailored data science and engineering solutions that empower businesses to achieve their analytics goals. Our experience with platforms like Snowflake and our deep domain expertise makes us the ideal partner for driving data-driven innovation and unlocking the next wave of growth for your enterprise.

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