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@debasishchakraborty-egovt debasishchakraborty-egovt commented Apr 21, 2025

PR #24 "Added public service" introduces a new Go-based microservice to the DIGIT Studio platform that:

Provides REST APIs for service management:

Creating service definitions
Updating existing services
Searching for services
Offers application management with workflow integration:

Creating applications
Updating application status
Searching applications with filtering
Integrates with external services:

Workflow Service for application state transitions
Individual Service for applicant data
Billing Service for demand generation
MDMS Service for master data
Uses modern infrastructure:

PostgreSQL for data persistence with Flyway migrations
Kafka for asynchronous processing
Docker and Docker Compose for containerization
Follows a clean architecture pattern with:

Controllers for handling HTTP requests
Services for business logic
Repositories for data access
Models for domain entities
Utilities for common functions

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Walkthrough

This change introduces a new Go-based "public-service" microservice, including its domain models, repositories, service/business logic, controllers, Kafka integration, and supporting utilities. It adds Docker and build configurations, a database schema with migration scripts, and environment setup. The service manages applications and services, integrates with workflow, billing, and MDMS systems, and provides RESTful endpoints for application and service management.

Changes

Files/Groups Change Summary
.idea/*, studio-services/public-service/.idea/* Added IDE configuration files for project/module structure, VCS mappings, and ignored files.
README.md Renamed project title from "Digit Solution Framework" to "Digit Studio".
build/build-config.yml, build/maven/Dockerfile, build/maven/start.sh Updated build configuration: replaced "generic-service" with "public-service", updated image names and paths, refactored Dockerfile to use Go 1.24, simplified build/run logic, added a start script.
studio-services/public-service/docker-compose.yaml Introduced Docker Compose setup for PostgreSQL and Flyway-based migrations, with persistent volumes and environment-driven configuration.
studio-services/public-service/.env Added environment variable file specifying ports, DB credentials, service endpoints, Kafka topics, and Flyway settings.
studio-services/public-service/go.mod Introduced Go module with dependencies for HTTP routing, validation, database drivers, Kafka, dotenv, and custom digit client.
studio-services/public-service/main.go Created application entry point: initializes logging, DB, Kafka, repositories, services, controllers, and HTTP routes; starts the server.
studio-services/public-service/config/config.go Added environment loader that conditionally loads .env (unless running in Kubernetes) and a helper for fetching environment variables.
studio-services/public-service/repository/* Implemented repositories for DB and REST operations: includes application and service CRUD, dynamic SQL queries, Kafka-based async ops, and HTTP POST utility.
studio-services/public-service/model/* Defined comprehensive domain models: Application, Service, Applicant, Address, Workflow, Demand, Individual, Response/Request wrappers, MDMS, and supporting types. Includes builder patterns, JSON (un)marshaling, and validation tags.
studio-services/public-service/model/demand/* Added demand-related models, including enums, details, request/response wrappers, and custom JSON marshaling logic.
studio-services/public-service/model/individual/* Introduced individual/user models, request/response/search types, gender enum, and validation.
studio-services/public-service/service/* Implemented business logic: application/service CRUD, enrichment, workflow integration, billing, MDMS, and individual management. Includes external REST and Kafka integrations, enrichment routines, and workflow state helpers.
studio-services/public-service/controller/* Added HTTP controllers for application and service resources, handling request parsing, validation, error responses, and invoking service logic.
studio-services/public-service/kafka/public_service_producer.go Added Kafka producer abstraction for publishing messages to topics, used in async application operations.
studio-services/public-service/scripts/migration.go Script to automate DB migrations by executing all .sql files in a directory against the configured PostgreSQL instance.
studio-services/public-service/scripts/migration/Dockerfile, migration.sh, sql/*.sql Added Flyway-based migration Dockerfile and shell script; created SQL migration scripts for initial schema and constraint updates.
studio-services/public-service/utils/* Introduced logging utilities and a centralized error response writer for HTTP handlers.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant HTTP_Controller
    participant Service_Layer
    participant Repository
    participant DB
    participant Kafka
    participant Workflow
    participant Billing
    participant MDMS

    Client->>HTTP_Controller: HTTP Request (e.g., Create Application)
    HTTP_Controller->>Service_Layer: Parse & Validate Request
    Service_Layer->>Repository: Create/Update/Search (DB or Kafka)
    alt Async via Kafka
        Repository->>Kafka: Produce Message
        Kafka-->>Repository: Ack/Result (async)
    else Direct DB
        Repository->>DB: SQL Query/Command
        DB-->>Repository: Result
    end
    Service_Layer->>Workflow: Trigger Workflow (if needed)
    Workflow-->>Service_Layer: Workflow Result
    Service_Layer->>Billing: (If Demand) Save/Update Demand
    Billing-->>Service_Layer: Demand Result
    Service_Layer->>MDMS: (If needed) Fetch Master Data
    MDMS-->>Service_Layer: MDMS Data
    Service_Layer->>HTTP_Controller: Compose Response
    HTTP_Controller->>Client: HTTP Response (JSON)
Loading

Possibly related PRs

  • egovernments/DIGIT-Studio#30: Updates the Go Dockerfile base image and build stages, directly related to the Dockerfile changes in this PR.
  • egovernments/DIGIT-Studio#27: Refactors Dockerfile and build scripts for Go service, introducing a start script and simplifying the build, which aligns with the changes made here.

Poem

🐇
A studio springs up, code anew,
With models and services, a bustling crew.
Kafka and workflow, all in the mix,
Docker and SQL, clever new tricks.
From ENV to REST, the pieces align—
Digit Studio’s future, looking just fine!
— Your code rabbit, hopping in time.


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@jagankumar-egov
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coderabbitai bot commented May 7, 2025

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coderabbitai bot commented May 7, 2025

Tip

For best results, initiate chat on the files or code changes.

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
# Get PR information
gh pr view 24 --json title,body,state,baseRefName,headRefName,changedFiles

# Get a list of files changed in the PR
gh pr view 24 --json files --jq '.files[].path'

Length of output: 5074


🏁 Script executed:

#!/bin/bash
# Check if there's a README for the public service
if [ -f "studio-services/public-service/README.md" ]; then
    cat "studio-services/public-service/README.md"
    echo "README found"
else
    echo "No README found for public-service"
fi

# Look at the main.go file to understand the service
cat "studio-services/public-service/main.go"

# Check the config to understand service configuration
cat "studio-services/public-service/config/config.go"

Length of output: 3307


@jagankumar-egov Hi there! I see you've tagged me on PR #24 "Added public service". I've taken a look at your pull request and here's what I found:

This PR adds a new Go-based microservice called "public-service" with:

  • REST API endpoints for service and application management
  • Database integration with migration scripts
  • Kafka producer for event handling
  • Integration with workflow, demand, and individual services
  • 89 changed files, mostly Go code in the new service

How can I help you with this PR? I can:

  1. Review the code for best practices and potential issues
  2. Generate a summary of the changes
  3. Create documentation (like a README.md) for the new service
  4. Answer specific questions about the implementation
  5. Help with testing or deployment configurations

Let me know what you'd like me to do by providing more specific instructions.

@jagankumar-egov
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jagankumar-egov commented May 7, 2025

@coderabbitai review

Review the code for best practices and potential issues
Generate a summary of the changes
Create documentation (like a README.md) for the new service

Copy link

coderabbitai bot commented May 7, 2025

Tip

For best results, initiate chat on the files or code changes.

🧩 Analysis chain

Based on the script results, I need to gather more information to fully understand the architecture and dependencies.

Now let's check the API routing, error handling, and utility functions:

Now that I have a good understanding of the codebase, let me perform one final check on the documentation, CI/CD configuration, and check for potential security issues:

Now I'll create a comprehensive code review, summary, and documentation in README format based on the information I've gathered.

flowchart TB
    A["Public Service Documentation and Review"]
    B["1. Create README.md"]
    C["2. Review Code Best Practices"]
    D["3. Generate PR Summary"]
    A --> B
    A --> C
    A --> D
    B1["Document Purpose & Features"]
    B2["Document Architecture"]
    B3["Document Setup Instructions"]
    B4["Document API Endpoints"]
    B5["Document Configuration Options"]
    B --> B1
    B --> B2
    B --> B3
    B --> B4
    B --> B5
    C1["Review Code Organization"]
    C2["Review Error Handling"]
    C3["Review Security Practices"]
    C4["Review Integration Patterns"]
    C5["Review Testing"]
    C --> C1
    C --> C2
    C --> C3
    C --> C4
    C --> C5
    D1["Summarize Service Purpose"]
    D2["Summarize Key Components"]
    D3["Summarize Changes"]
    D --> D1
    D --> D2
    D --> D3
Loading

@jagankumar-egov Thank you for your request! I've analyzed the PR and prepared the requested items. Here's a comprehensive response for each part:

Review of the Code for Best Practices and Potential Issues

Strengths

  • Clean Architecture: Good separation of layers (controllers, services, repositories, models)
  • Dependency Injection: Makes the code more testable and maintainable
  • Consistent Error Handling: Uses custom error responses for API errors
  • Environment Configuration: Well-organized approach to loading configurations
  • Database Migrations: Proper use of Flyway for schema management

Areas for Improvement

  1. Testing: No test files detected. Unit tests should be added for core functionality.
  2. Error Handling: Some inconsistencies in how errors are logged and returned.
  3. Input Validation: Relies mostly on struct tags; consider adding deeper business logic validation.
  4. Documentation: Missing inline documentation for functions and types.
  5. Pagination: Search endpoints don't implement pagination, which could lead to performance issues.
  6. Context Propagation: Not all functions properly accept and propagate context.
  7. Transaction Management: Missing explicit transaction handling for operations that modify multiple tables.
  8. Hardcoded Values: Some service names and configuration values are hardcoded rather than configurable.

Summary of Changes

This PR adds a new Go-based microservice called "Public Service" to the DIGIT Studio platform with:

  • REST API endpoints for service and application management
  • Integration with workflow, billing, individual, and MDMS services
  • PostgreSQL persistence with Flyway migrations
  • Kafka-based asynchronous processing
  • Docker and Docker Compose support for deployment
  • Updated build configurations

The service follows a clean architecture with controllers, services, repositories, and models layers. It provides functionality for creating, updating, and searching services and applications, with workflow integration for application lifecycle management.

Documentation (README.md)

I've created a comprehensive README.md that includes:

  • Service overview and features
  • Architecture description
  • Setup and installation instructions
  • API endpoint documentation
  • Database schema overview
  • Development guidelines

Would you like me to provide the complete README.md content as a proposed file change, or would you prefer I focus on any specific aspect of the review or documentation in more detail?


🏁 Script executed:

#!/bin/bash
# First, let's examine the structure of the public-service directory
find studio-services/public-service -type f -name "*.go" | sort

# Let's look at the main.go file to understand the service's entry point
cat studio-services/public-service/main.go

# Look at the controller files to understand the API endpoints
cat studio-services/public-service/controller/public_controller.go
cat studio-services/public-service/controller/application_controller.go

# Check the environment file to understand configuration
cat studio-services/public-service/-.env 2>/dev/null || echo "No .env file found"
cat studio-services/public-service/.env 2>/dev/null || echo "No .env file found"

# Check for migration scripts to understand database structure
find studio-services/public-service/scripts/migration/sql -type f | sort
cat studio-services/public-service/scripts/migration/sql/V20251104__create_public_service_table.sql

Length of output: 22014


🏁 Script executed:

#!/bin/bash
# Let's look at model definitions to understand the data structures
cat studio-services/public-service/model/Service.go
cat studio-services/public-service/model/Application.go

# Check repository implementations to understand data access
cat studio-services/public-service/repository/public_repository.go

# Look at service implementations
cat studio-services/public-service/service/public_service.go
cat studio-services/public-service/service/application_service.go

# Check Kafka producer if present
cat studio-services/public-service/kafka/public_service_producer.go

# Check for Docker/build configurations
cat studio-services/public-service/docker-compose.yaml 2>/dev/null || echo "No docker-compose.yaml file found"

Length of output: 14177


🏁 Script executed:

#!/bin/bash
# Check the error handling and utilities
ls -la studio-services/public-service/utils/ 2>/dev/null
cat studio-services/public-service/utils/custom_exception.go 2>/dev/null
cat studio-services/public-service/utils/logger.go 2>/dev/null

# Look at integration with external services
ls -la studio-services/public-service/service/ | grep -v public_service | grep -v application_service
cat studio-services/public-service/service/workflow_integrator_service.go 2>/dev/null

# Check for tests
find studio-services/public-service -name "*_test.go" | wc -l

# Check build configurations
cat build/build-config.yml 2>/dev/null
cat build/maven/Dockerfile 2>/dev/null

# Check go module dependencies
cat studio-services/public-service/go.mod 2>/dev/null

Length of output: 10241


🏁 Script executed:

#!/bin/bash
# Check for potential security issues
grep -r "TODO" --include="*.go" studio-services/public-service/ 2>/dev/null
grep -r "FIXME" --include="*.go" studio-services/public-service/ 2>/dev/null
grep -r "fmt.Println" --include="*.go" studio-services/public-service/ 2>/dev/null
grep -r "os.Getenv" --include="*.go" studio-services/public-service/ 2>/dev/null

# Check for exposed secrets
grep -r "password" --include="*.go" studio-services/public-service/ 2>/dev/null
grep -r "key" --include="*.go" studio-services/public-service/ 2>/dev/null

# Check environment variables usage
grep -r "GetEnv" --include="*.go" studio-services/public-service/ 2>/dev/null

# Check error handling patterns
grep -r "if err != nil" --include="*.go" studio-services/public-service/ | wc -l

Length of output: 5295


🏁 Script executed:

cd studio-services/public-service
docker-compose up -d

Length of output: 163


🏁 Script executed:

cd studio-services/public-service
go mod download
go run main.go

Length of output: 280


@jagankumar-egov I've analyzed the PR and prepared the requested items. Here's a comprehensive response to your requests:

Review of Code Best Practices and Potential Issues

Strengths

  • Clean Architecture: Well-separated layers with controllers, services, repositories, and models.
  • Dependency Injection: Services and repositories are properly injected, making the code more testable.
  • Error Handling: Centralized error response utility in the utils package.
  • Environment Configuration: Good approach to loading configuration with fallbacks.
  • JSON Handling: Consistent approach to marshaling/unmarshaling complex data.
  • Database Migrations: Using Flyway for managed schema evolution.

Areas for Improvement

  1. No Test Coverage: No test files were found in the codebase. Unit and integration tests should be added.

  2. Inconsistent Error Handling: Some methods log and return errors, while others wrap them with additional context. A consistent approach would be better.

    // Example of inconsistent error handling
    if err != nil {
        log.Printf("Update Service error: %v", err) // Some places log
        return model.ServiceResponse{}, err // Without wrapping
    }
    
    // vs.
    
    if err != nil {
        return nil, fmt.Errorf("failed to update service: %w", err) // Other places wrap
    }
  3. Input Validation: Relies mostly on struct tags without deeper business logic validation.

  4. Transaction Management: No explicit transaction handling for operations that modify multiple tables.

  5. Environment Variable Validation: Direct access to environment variables without validation in some places.

    wfHost := os.Getenv("WORKFLOW_HOST")
    wfPath := os.Getenv("WORKFLOW_TRANSITION_PATH")
    // Missing validation for empty values in some places
  6. Pagination: Search endpoints don't implement pagination, which could lead to performance issues with large datasets.

  7. Hardcoded Values: Some service names and configuration values are hardcoded.

  8. Incomplete Workflow Integration: The application workflow integration has an empty condition for the PAY action.

    if req.Application.Workflow.Action == "PAY" {
        // Empty block - potentially incomplete implementation
    }

Summary of Changes

PR #24 "Added public service" introduces a new Go-based microservice to the DIGIT Studio platform that:

  1. Provides REST APIs for service management:

    • Creating service definitions
    • Updating existing services
    • Searching for services
  2. Offers application management with workflow integration:

    • Creating applications
    • Updating application status
    • Searching applications with filtering
  3. Integrates with external services:

    • Workflow Service for application state transitions
    • Individual Service for applicant data
    • Billing Service for demand generation
    • MDMS Service for master data
  4. Uses modern infrastructure:

    • PostgreSQL for data persistence with Flyway migrations
    • Kafka for asynchronous processing
    • Docker and Docker Compose for containerization
  5. Follows a clean architecture pattern with:

    • Controllers for handling HTTP requests
    • Services for business logic
    • Repositories for data access
    • Models for domain entities
    • Utilities for common functions

Documentation (README.md)

I've created a comprehensive README.md for the public-service. Here's a preview:

# Public Service

The Public Service is a microservice that manages public services and applications within the DIGIT ecosystem. It provides APIs for creating, updating, and searching services and applications, with workflow integration.

## Features

- Service management (create/update/search)
- Application management with workflow integration
- Integration with Individual, Billing, and MDMS services
- Kafka-based asynchronous processing
- PostgreSQL data persistence with Flyway migrations

## Architecture

The service follows a clean architecture pattern with distinct layers:

- **Controllers**: Handle HTTP requests and responses
- **Services**: Implement business logic
- **Repositories**: Handle data access and persistence
- **Models**: Define domain entities and data transfer objects
- **Utils**: Provide common utilities for logging and error handling

## Setup and Installation

### Prerequisites

- Go 1.24+
- PostgreSQL 15
- Kafka

### Environment Configuration

Configure the service using environment variables in a `.env` file:

Server Configuration

SERVER_PORT=8080

Database Configuration

DB_HOST=localhost
DB_PORT=5432
DB_USER=postgres
DB_PASSWORD=postgres
DB_NAME=postgres
DB_SCHEMA=public

External Service Endpoints

WORKFLOW_HOST=http://localhost:8081/
WORKFLOW_TRANSITION_PATH=egov-workflow-v2/egov-wf/process/_transition
WORKFLOW_SEARCH_PATH=egov-workflow-v2/egov-wf/process/_search

... more environment variables


## API Endpoints

### Service Management

#### Create Service
- **Endpoint**: POST `/public-service/v1/service`
- **Required Headers**: `X-Tenant-Id`

#### Update Service
- **Endpoint**: PUT `/public-service/v1/service/{serviceCode}`
- **Required Headers**: `X-Tenant-Id`

#### Search Services
- **Endpoint**: GET `/public-service/v1/service`
- **Required Headers**: `X-Tenant-Id`
- **Query Parameters**: `module`, `businessService`, `serviceCode`

### Application Management

#### Create Application
- **Endpoint**: POST `/public-service/v1/application/{serviceCode}`
- **Required Headers**: `X-Tenant-Id`

#### Update Application
- **Endpoint**: PUT `/public-service/v1/application/{serviceCode}/{applicationId}`
- **Required Headers**: `X-Tenant-Id`

#### Search Applications
- **Endpoint**: GET `/public-service/v1/application/{serviceCode}`
- **Required Headers**: `X-Tenant-Id`
- **Query Parameters**: `module`, `businessService`, `status`, `applicationNumber`, `ids`

Would you like me to include the full README.md content as a file? Also, would you like more detailed information on any specific aspect of the review or documentation?


✏️ Learnings added
Learnt from: jagankumar-egov
URL: https://github.com/egovernments/DIGIT-Studio/pull/24

Timestamp: 2025-05-07T09:54:31.826Z
Learning: The public-service is a Go-based microservice in the DIGIT Studio platform that manages services and applications, with REST APIs, PostgreSQL storage, Kafka messaging, and integration with workflow, billing, and individual services.

Learnt from: jagankumar-egov
URL: https://github.com/egovernments/DIGIT-Studio/pull/24

Timestamp: 2025-05-07T09:54:31.826Z
Learning: The public-service in DIGIT-Studio is a Go microservice that uses a clean architecture pattern with controllers, services, repositories, and models, integrating with workflow, billing, individual, and MDMS services, using PostgreSQL for storage and Kafka for async processing.

Note: Learnings are effective only in the context of similar code segments. To apply general coding guidelines, please configure review instructions. You can manage existing learnings in the app.


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