sequenceDiagram
participant Source as Event Source
participant Dispatcher as Event Dispatcher
participant Queue as Queue System
participant Broadcast as Broadcaster
participant Listeners as Event Listeners
participant DB as Database
participant Cache as Cache System
participant Subscribers as Event Subscribers
%% Event Creation
Source->>Dispatcher: Dispatch Event
activate Dispatcher
Note over Dispatcher: Event Created
%% Event Type Check
alt Is Queued Event
Dispatcher->>Queue: Push to Queue
activate Queue
Queue-->>Dispatcher: Queued Successfully
deactivate Queue
else Is Immediate Event
Dispatcher->>Listeners: Process Immediately
activate Listeners
end
%% Broadcasting Check
alt Should Broadcast
Dispatcher->>Broadcast: Broadcast Event
activate Broadcast
Note over Broadcast: WebSocket/Redis/Pusher
Broadcast-->>Dispatcher: Broadcast Complete
deactivate Broadcast
end
%% Database Operations
alt Has Database Operations
Dispatcher->>DB: Begin Transaction
activate DB
Note over DB: Event-related Changes
DB-->>Dispatcher: Transaction Complete
deactivate DB
end
%% Cache Operations
alt Has Cache Operations
Dispatcher->>Cache: Update Cache
activate Cache
Note over Cache: Cache Invalidation/Update
Cache-->>Dispatcher: Cache Updated
deactivate Cache
end
%% Event Subscribers
Dispatcher->>Subscribers: Notify Subscribers
activate Subscribers
Note over Subscribers: Handle Multiple Events
Subscribers-->>Dispatcher: Processing Complete
deactivate Subscribers
%% Queued Event Processing
alt Is Queued Event
Queue->>Listeners: Process Queue
activate Queue
Note over Queue: Background Processing
Listeners-->>Queue: Processing Complete
deactivate Queue
end
%% Event Listeners Processing
Note over Listeners: Process Event
Listeners-->>Dispatcher: Handling Complete
deactivate Listeners
%% Event Completion
Dispatcher-->>Source: Event Processed
deactivate Dispatcher
%% Style Definitions
style Source fill:#f9f,stroke:#333,stroke-width:2px
style Dispatcher fill:#bbf,stroke:#333,stroke-width:2px
style Queue fill:#bfb,stroke:#333,stroke-width:2px
style Broadcast fill:#fbb,stroke:#333,stroke-width:2px
style Listeners fill:#bfb,stroke:#333,stroke-width:2px
style DB fill:#fbb,stroke:#333,stroke-width:2px
style Cache fill:#fbb,stroke:#333,stroke-width:2px
style Subscribers fill:#bfb,stroke:#333,stroke-width:2px
%% Notes
Note right of Source: System Component
Note right of Dispatcher: Event Management
Note right of Queue: Async Processing
Note right of Broadcast: Real-time Updates
Note right of Listeners: Event Handlers
Note right of DB: Persistence Layer
Note right of Cache: Performance Layer
Note right of Subscribers: Event Subscribers
%% Event Types
Note over Dispatcher: Event Types:
1. Immediate Events
2. Queued Events
3. Broadcast Events
%% Processing Types
Note over Listeners: Processing Types:
1. Sync Processing
2. Async Processing
3. Batch Processing
%% Integration Points
Note over Queue: Integration:
1. Redis Queue
2. Database Queue
3. Memory Queue
%% Broadcast Channels
Note over Broadcast: Channels:
1. Public Channels
2. Private Channels
3. Presence Channels
%% Subscriber Types
Note over Subscribers: Subscriber Types:
1. Model Subscribers
2. System Subscribers
3. Custom Subscribers