This is a Web Application Monitoring System that helps teams and individuals monitor the health and availability of their web applications. Think of it as a "watchdog" for your websites and APIs that:
- Continuously monitors your web applications by checking if they're responding correctly
- Automatically detects issues when your apps are down or returning unexpected responses
- Creates incidents to track problems from detection to resolution
- Notifies team members who are subscribed to monitoring alerts
- Provides a collaborative platform for managing application reliability
Instead of discovering your website is down when customers complain, this system proactively monitors your applications 24/7 and immediately alerts your team when issues occur, enabling faster response times and better user experience.
Represents people who use the monitoring system.
Properties:
id- Unique identifiername- Full name (e.g., "John Doe")email- Email address (unique, used for login)password- Encrypted passwordcreated_at- Account creation dateupdated_at- Last profile update date
Role: Can own applications, create incidents, subscribe to monitoring alerts
Represents web applications being monitored.
Properties:
id- Unique identifier (UUID)name- Application name (e.g., "Company Website")url- Main application URL (e.g., "https://mycompany.com")url_to_watch- Specific endpoint to monitor (optional, e.g., "/api/health")expected_http_code- Expected response code (default: 200)user_id- Owner of the application (foreign key)created_at- Registration dateupdated_at- Last modification date
Role: The target of monitoring activities, generates incidents when issues are detected
Represents issues or problems detected with applications.
Properties:
id- Unique identifier (UUID)title- Brief description (e.g., "Website returning 500 errors")description- Detailed explanation of the issueapplication_id- Which application has the issue (foreign key)user_id- Who reported/created the incident (foreign key)status- Current state: OPEN → IN_PROGRESS → RESOLVED → CLOSEDseverity- Impact level: LOW, HIGH, CRITICALstarted_at- When the issue beganended_at- When the issue was resolved (null while ongoing)created_at- When incident was reportedupdated_at- Last status/detail update
Role: Tracks problems from detection through resolution, maintains incident history
Represents logical groupings of applications for organized monitoring.
Properties:
id- Unique identifier (UUID)name- Group name (e.g., "Production APIs", "Frontend Applications")description- Group description (optional)user_id- Owner of the group (foreign key)created_at- Group creation dateupdated_at- Last modification date
Role: Organizes applications into logical groups, enables bulk subscription management
Represents the many-to-many relationship between applications and groups.
Properties:
id- Unique identifier (UUID)application_id- The application (foreign key)group_id- The group (foreign key)added_by- User who added the application to group (foreign key)created_at- When application was added to groupupdated_at- Last modification date
Role: Links applications to groups, maintains group membership history
Represents user interest in monitoring specific applications or application groups.
Properties:
id- Unique identifier (UUID)user_id- The subscriber (foreign key)application_id- The application being monitored (foreign key, nullable)group_id- The application group being monitored (foreign key, nullable)notification_channels- JSON array of notification preferences (email, slack, teams, discord)created_at- Subscription dateupdated_at- Last modification date
Business Rules:
- Either
application_idORgroup_idmust be set (not both) - Group subscriptions automatically include all applications in the group
- When applications are added/removed from groups, notifications are sent to group subscribers
Role: Enables many-to-many relationships between users and applications/groups for notifications
Represents configured notification channels for users.
Properties:
id- Unique identifier (UUID)user_id- Channel owner (foreign key)type- Channel type: EMAIL, SLACK, TEAMS, DISCORDname- Channel name (e.g., "Dev Team Slack")configuration- JSON configuration (webhook URLs, channel IDs, tokens)is_active- Whether channel is enabledcreated_at- Channel creation dateupdated_at- Last modification date
Role: Manages user's notification delivery preferences and configurations
As an application owner
I want to register my web application in the monitoring system
So that I can track its availability and get alerted when issues occur
Acceptance Criteria:
- I can provide app name and URL
- I can specify which endpoint to monitor
- I can set expected HTTP response code
- System starts monitoring immediately after registration
As an application owner
I want to view and update my registered applications
So that I can keep monitoring configuration current
Acceptance Criteria:
- I can see list of all my applications
- I can edit application details (name, URL, expected response)
- I can delete applications I no longer need
- I can see monitoring status for each application
As an application owner
I want to view and manage incidents for my applications
So that I can track issues from detection to resolution
Acceptance Criteria:
- I can see all incidents for my applications
- I can update incident status (OPEN → IN_PROGRESS → RESOLVED → CLOSED)
- I can add details and comments to incidents
- I can see incident history and resolution times
As a team member
I want to subscribe to individual applications or groups of applications
So that I get notified when issues occur for any monitored resource
Acceptance Criteria:
- I can browse available applications and application groups
- I can subscribe to individual applications (even ones I don't own)
- I can subscribe to entire application groups for bulk monitoring
- I can see my current subscriptions (both apps and groups)
- I can unsubscribe from individual apps or entire groups when no longer interested
- When I subscribe to a group, I get notifications for all applications in that group
As an application owner or team lead
I want to organize my applications into logical groups
So that I can manage monitoring at scale and enable team subscriptions
Acceptance Criteria:
- I can create application groups with descriptive names
- I can add/remove applications to/from my groups
- I can see which applications belong to each group
- I can delete groups when no longer needed
- Team members can subscribe to my entire groups
- I can see who is subscribed to my groups
As a team member
I want to configure multiple notification channels (email, Slack, Teams, Discord)
So that I receive incident alerts through my preferred communication methods
Acceptance Criteria:
- I can configure email notifications with custom addresses
- I can set up Slack webhook integrations for team channels
- I can configure Microsoft Teams webhook notifications
- I can set up Discord webhook notifications for community servers
- I can test my notification channels to ensure they work
- I can choose different channels for different subscriptions
- I can enable/disable channels without deleting configurations
As a team member
I want to receive notifications through my configured channels when incidents occur
So that I can respond quickly through my preferred communication tools
Acceptance Criteria:
- I get notifications when new incidents are created for subscribed apps/groups
- I get updates when incident status changes
- I receive notifications through all my enabled channels (email, Slack, Teams, Discord)
- Notifications include incident details, severity, and direct links to the system
- I can see notification history across all channels
- Group subscriptions notify me about incidents in any application within the group
As a team member
I want to help resolve incidents for applications I monitor
So that I can contribute to maintaining system reliability
Acceptance Criteria:
- I can view incident details for subscribed applications
- I can update incident status and add information
- I can see who else is working on incidents
- I can track resolution progress
As a system administrator
I want to monitor the monitoring system itself
So that I can ensure reliable service delivery
Acceptance Criteria:
- I can see system performance metrics
- I can monitor background job processing
- I can track API usage patterns
- I get alerts about system issues
As the monitoring system
I want to continuously check registered applications
So that I can detect issues immediately
Acceptance Criteria:
- I check each application every 5 minutes
- I compare actual response with expected response
- I create incidents automatically when issues are detected
- I handle network timeouts and errors gracefully
As the monitoring system
I want to automatically create incidents when I detect issues
So that teams are immediately aware of problems
Acceptance Criteria:
- I create incidents with descriptive titles and details
- I set appropriate severity based on error type
- I notify all subscribers immediately
- I track when issues started
classDiagram
class User {
+UUID id
+String name
+String email
+String password
+DateTime created_at
+DateTime updated_at
+createApplication()
+createApplicationGroup()
+createIncident()
+subscribe()
+authenticate()
}
class Application {
+UUID id
+String name
+String url
+String url_to_watch
+Integer expected_http_code
+UUID user_id
+DateTime created_at
+DateTime updated_at
+checkHealth()
+generateIncident()
+getSubscribers()
+getGroups()
}
class ApplicationGroup {
+UUID id
+String name
+String description
+UUID user_id
+DateTime created_at
+DateTime updated_at
+addApplication()
+removeApplication()
+getApplications()
+getSubscribers()
}
class ApplicationGroupMembership {
+UUID id
+UUID application_id
+UUID group_id
+UUID added_by
+DateTime created_at
+DateTime updated_at
}
class Incident {
+UUID id
+String title
+String description
+UUID application_id
+UUID user_id
+IncidentStatus status
+IncidentSeverity severity
+DateTime started_at
+DateTime ended_at
+DateTime created_at
+DateTime updated_at
+updateStatus()
+resolve()
+close()
+notifySubscribers()
}
class Subscription {
+UUID id
+UUID user_id
+UUID application_id
+UUID group_id
+JSON notification_channels
+DateTime created_at
+DateTime updated_at
+notify()
+unsubscribe()
+getNotificationChannels()
}
class NotificationChannel {
+UUID id
+UUID user_id
+ChannelType type
+String name
+JSON configuration
+Boolean is_active
+DateTime created_at
+DateTime updated_at
+sendNotification()
+testConnection()
}
class IncidentStatus {
<<enumeration>>
OPEN
IN_PROGRESS
RESOLVED
CLOSED
}
class IncidentSeverity {
<<enumeration>>
LOW
HIGH
CRITICAL
}
class ChannelType {
<<enumeration>>
EMAIL
SLACK
TEAMS
DISCORD
}
%% Primary Relationships
User "1" --> "*" Application : owns
User "1" --> "*" ApplicationGroup : owns
User "1" --> "*" Incident : reports
User "1" --> "*" Subscription : subscribes
User "1" --> "*" NotificationChannel : configures
Application "1" --> "*" Incident : generates
Application "1" --> "*" Subscription : monitored_by
Application "1" --> "*" ApplicationGroupMembership : belongs_to
ApplicationGroup "1" --> "*" ApplicationGroupMembership : contains
ApplicationGroup "1" --> "*" Subscription : monitored_by
%% Junction Table Relationships
ApplicationGroupMembership "*" --> "1" Application : links
ApplicationGroupMembership "*" --> "1" ApplicationGroup : links
ApplicationGroupMembership "*" --> "1" User : added_by
%% Subscription Relationships (Either App OR Group)
Subscription "*" --> "1" User : belongs_to
Subscription "*" --> "0..1" Application : monitors
Subscription "*" --> "0..1" ApplicationGroup : monitors
%% Enum Relationships
Incident "*" --> "1" IncidentStatus : has
Incident "*" --> "1" IncidentSeverity : has
NotificationChannel "*" --> "1" ChannelType : has
%% Notes
note for User "Can own applications and groups\nCan subscribe to apps/groups\nCan configure notification channels"
note for Application "Continuously monitored\nCan belong to multiple groups\nGenerates incidents"
note for ApplicationGroup "Logical grouping of applications\nEnables bulk subscription\nOwned by users"
note for Subscription "Monitors either single app OR group\nMultiple notification channels\nUnique per user-target pair"
note for Incident "Auto-notifies app subscribers\nAuto-notifies group subscribers\nFollows status workflow"
note for NotificationChannel "Email, Slack, Teams, Discord\nUser-configurable\nReusable across subscriptions"
POST /api/auth/register # User registration
POST /api/auth/login # User login (returns auth token)
POST /api/auth/logout # User logout (revoke token)
GET /api/auth/user # Get authenticated user profile
PUT /api/auth/user # Update user profile
POST /api/auth/password/reset # Request password reset
POST /api/auth/password/confirm # Confirm password reset with token
POST /api/auth/email/verify # Verify email address (optional)
GET /api/applications # List user's applications (with nested incidents)
POST /api/applications # Create new application
GET /api/applications/{id} # Get specific application details
PUT /api/applications/{id} # Update application (owner only)
DELETE /api/applications/{id} # Delete application (owner only)
GET /api/applications/search # Search applications by name/URL
PUT /api/applications/{id}/group # Add/remove application from group
GET /api/application-groups # List user's application groups
POST /api/application-groups # Create new application group
GET /api/application-groups/{id} # Get specific group details with applications
PUT /api/application-groups/{id} # Update group (name, description)
DELETE /api/application-groups/{id} # Delete group (owner only)
GET /api/application-groups/search # Search groups by name/description
POST /api/application-groups/{id}/applications # Add application to group
DELETE /api/application-groups/{id}/applications/{appId} # Remove application from group
GET /api/application-groups/{id}/applications # List applications in group
POST /api/application-groups/{id}/applications/bulk # Bulk add applications to group
DELETE /api/application-groups/{id}/applications/bulk # Bulk remove applications from group
POST /api/applications/{id}/check # Trigger manual health check
GET /api/applications/{id}/status # Get current monitoring status
GET /api/applications/{id}/health-history # Get health check history
PUT /api/applications/{id}/monitoring # Update monitoring settings
GET /api/incidents # List incidents (for user's apps + subscribed apps)
POST /api/incidents # Create new incident
GET /api/incidents/{id} # Get specific incident details
PUT /api/incidents/{id} # Update incident (status, details, etc.)
DELETE /api/incidents/{id} # Delete incident (soft delete recommended)
GET /api/incidents/search # Search incidents by title/description/status
GET /api/incidents/stats # Get incident statistics
GET /api/incidents?status=OPEN # Filter by status
GET /api/incidents?severity=HIGH # Filter by severity
GET /api/incidents?application_id={id} # Filter by application
GET /api/incidents?user_id={id} # Filter by reporter
GET /api/incidents?start_date={date} # Filter by date range
GET /api/incidents?end_date={date} # Filter by date range
GET /api/applications/{id}/incidents # Get all incidents for specific app
GET /api/applications/{id}/incidents/active # Get only active incidents
GET /api/applications/{id}/incidents/resolved # Get resolved incidents
GET /api/subscriptions # List user's subscriptions
POST /api/subscriptions/applications/{id} # Subscribe to application
POST /api/subscriptions/groups/{id} # Subscribe to application group
DELETE /api/subscriptions/{id} # Delete subscription (unsubscribe)
GET /api/subscriptions/search # Search subscriptions
PUT /api/subscriptions/{id}/channels # Update notification channels for subscription
GET /api/applications/{id}/subscribers # List app subscribers (owner only)
POST /api/applications/{id}/subscribers # Add subscriber (owner only) - optional
DELETE /api/applications/{id}/subscribers/{userId} # Remove subscriber (owner only) - optional
GET /api/application-groups/{id}/subscribers # List group subscribers (owner only)
POST /api/application-groups/{id}/subscribers # Add subscriber (owner only) - optional
DELETE /api/application-groups/{id}/subscribers/{userId} # Remove subscriber (owner only) - optional
GET /api/notification-channels # List user's notification channels
POST /api/notification-channels # Create new notification channel
GET /api/notification-channels/{id} # Get specific channel details
PUT /api/notification-channels/{id} # Update channel configuration
DELETE /api/notification-channels/{id} # Delete notification channel
POST /api/notification-channels/{id}/test # Test channel connection
GET /api/notifications # Get user's notifications
PUT /api/notifications/{id}/read # Mark notification as read
DELETE /api/notifications/{id} # Delete notification
GET /api/notifications/unread # Get only unread notifications
PUT /api/notifications/read-all # Mark all notifications as read
GET /api/notifications/history # Get notification delivery history across all channels
GET /api/user/preferences # Get notification preferences
PUT /api/user/preferences # Update notification preferences
GET /api/user/settings # Get user settings
PUT /api/user/settings # Update user settings
GET /api/stats/dashboard # Get dashboard statistics
GET /api/stats/applications # Get application statistics
GET /api/stats/incidents # Get incident statistics
GET /api/stats/uptime/{id} # Get uptime statistics for application
GET /api/stats/response-times/{id} # Get response time statistics
GET /api/search/applications # Search public/discoverable applications
GET /api/search/users # Search users (for subscription purposes)
GET /api/search/global # Global search across entities
GET /api/admin/system/status # System health check
GET /api/admin/users # List all users (admin only)
GET /api/admin/applications # List all applications (admin only)
GET /api/admin/incidents # List all incidents (admin only)
GET /api/admin/stats # System-wide statistics
POST /api/admin/maintenance # Put system in maintenance mode
GET /api/webhooks # List user's webhooks
POST /api/webhooks # Create webhook
PUT /api/webhooks/{id} # Update webhook
DELETE /api/webhooks/{id} # Delete webhook
POST /api/webhooks/{id}/test # Test webhook delivery
GET /api/export/incidents # Export incidents to CSV/JSON
GET /api/export/applications # Export applications to CSV/JSON
GET /api/export/subscriptions # Export subscriptions to CSV/JSON
GET /api/export/reports/{type} # Export various reports
POST /api/batch/applications # Batch create applications
PUT /api/batch/applications # Batch update applications
POST /api/batch/incidents/status # Batch update incident statuses
POST /api/batch/subscriptions # Batch create subscriptions
{
"status": "success",
"data": { /* response data */ },
"meta": {
"pagination": { /* if applicable */ },
"timestamp": "2024-01-01T00:00:00Z"
}
}{
"status": "error",
"message": "Error description",
"errors": { /* validation errors if applicable */ },
"code": "ERROR_CODE",
"timestamp": "2024-01-01T00:00:00Z"
}{
"status": "success",
"data": [ /* array of items */ ],
"meta": {
"pagination": {
"current_page": 1,
"per_page": 20,
"total": 150,
"total_pages": 8,
"has_next": true,
"has_previous": false
},
"timestamp": "2024-01-01T00:00:00Z"
}
}All API endpoints (except auth/register and auth/login) require authentication via:
- Bearer Token:
Authorization: Bearer {token}header - Session Cookie: For web-based clients (optional)
- API Key: For service-to-service communication (optional)
?status=OPEN,IN_PROGRESS- Filter by multiple values?severity=HIGH- Filter by severity?user_id={id}- Filter by user?application_id={id}- Filter by application
?sort=created_at- Sort by field?order=desc- Sort order (asc/desc)
?page=2- Page number?per_page=50- Items per page (max 100)
?start_date=2024-01-01- Start date filter?end_date=2024-01-31- End date filter
?include=incidents- Include nested incidents?include=subscribers- Include subscriber information?include=user- Include user details
- User registration with email/password
- User login with secure authentication
- Password reset functionality
- User profile management
- Email verification (optional)
- User logout and session management
- Register new application for monitoring
- Edit application details (name, URL, expected response)
- Delete application (with cascade cleanup)
- View all user's applications
- View application monitoring status
- Manual health check trigger
- Application list with search/filter
- Automatic health checks every 5 minutes
- HTTP response code validation
- Network timeout handling
- Connection failure detection
- Custom endpoint monitoring (url_to_watch)
- Monitoring frequency configuration
- Health check history tracking
- Monitoring status dashboard
- Automatic incident creation from monitoring
- Manual incident creation
- Incident status workflow (OPEN → IN_PROGRESS → RESOLVED → CLOSED)
- Incident severity management (LOW, HIGH, CRITICAL)
- Incident details and description
- Incident assignment and tracking
- Incident history and timeline
- Incident search and filtering
- Incident resolution tracking
- Incident statistics and reporting
- Create application groups with names and descriptions
- Add applications to groups
- Remove applications from groups
- View applications within groups
- Delete application groups
- Search and filter application groups
- Bulk add/remove applications to/from groups
- View group subscribers (for owners)
- Subscribe to individual application monitoring
- Subscribe to application group monitoring (bulk subscription)
- Unsubscribe from individual applications
- Unsubscribe from application groups
- View current subscriptions (applications and groups)
- View application subscribers (for owners)
- View application group subscribers (for owners)
- Automatic notifications for group members when apps are added/removed
- Email notifications for incidents and status changes
- Slack webhook integration for team channels
- Microsoft Teams webhook integration
- Discord webhook integration for community servers
- Configure notification channels (email, Slack, Teams, Discord)
- Test notification channel connections
- Per-subscription notification channel preferences
- Enable/disable notification channels
- Notification delivery history across all channels
- In-app notification center
- Notification preferences management
- RESTful API design
- Authentication endpoints (register, login, logout)
- Application CRUD endpoints
- Application Group CRUD endpoints
- Application Group membership management endpoints
- Incident CRUD endpoints
- Subscription CRUD endpoints (applications and groups)
- Notification channel management endpoints
- Monitoring endpoints (status, manual check)
- Search and filtering endpoints
- Statistics and reporting endpoints
- Webhook endpoints for integrations
- Batch operations endpoints
- API documentation (Swagger/OpenAPI)
- API rate limiting
- API error handling
- API response pagination
- Password hashing and encryption
- Secure token/session management
- Input validation and sanitization
- SQL injection prevention
- CSRF protection
- Rate limiting and abuse prevention
- Access control and authorization
- HTTPS/TLS encryption
- Security headers
- Audit logging
- Database query optimization
- Background job processing for monitoring
- Caching for frequently accessed data
- Database indexing strategy
- API response time optimization
- Concurrent user support
- Load testing and performance monitoring
- Memory usage optimization
- Unit tests for business logic
- Integration tests for API endpoints
- End-to-end tests for critical workflows
- Database testing with fixtures
- Mock external dependencies
- Performance testing
- Security testing
- Test coverage reporting (90%+ target)
- Application logging and monitoring
- Error tracking and alerting
- Performance metrics collection
- Database backup and recovery
- Health check for the monitoring system itself
- System administration dashboard
- Usage analytics and reporting
- Capacity planning metrics
- Responsive web interface (optional)
- User-friendly error messages
- Loading states and progress indicators
- Data visualization (charts, graphs)
- Export functionality (CSV, PDF)
- Keyboard shortcuts and accessibility
- Multi-language support (optional)
- Dark/light theme support (optional)
- Docker containerization
- Database migrations
- Environment configuration
- Kubernetes deployment
- AWS/Azure/GCP deployment
- CI/CD pipeline setup
- Production deployment scripts
- Backup and restore procedures
- Monitoring and alerting setup
- Documentation and README
This monitoring system provides 4 core capabilities:
- Proactive Monitoring: Continuously watches your applications and detects issues automatically
- Incident Tracking: Manages problems from detection through resolution with a clear workflow
- Team Collaboration: Enables teams to subscribe to applications and stay informed about issues
- Historical Visibility: Maintains records of application reliability and incident patterns
The system is designed to be technology-agnostic and can be implemented using any modern web framework (Laravel, Django, Express.js, Spring Boot, etc.) while maintaining the same core functionality and user experience.