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"""
WebSocket Data Broadcaster
Broadcasts real-time cryptocurrency data from database to connected clients
"""
import asyncio
import logging
from datetime import datetime
from typing import Dict, Any
from database.db_manager import db_manager
from backend.services.ws_service_manager import ws_manager, ServiceType
from utils.logger import setup_logger
logger = setup_logger("ws_data_broadcaster")
class DataBroadcaster:
"""
Broadcasts cryptocurrency data updates to WebSocket clients
"""
def __init__(self):
"""Initialize the broadcaster"""
self.last_broadcast = {}
self.broadcast_interval = 5 # seconds for price updates
self.is_running = False
logger.info("DataBroadcaster initialized")
async def start_broadcasting(self):
"""Start all broadcast tasks"""
logger.info("Starting WebSocket data broadcaster...")
self.is_running = True
tasks = [
self.broadcast_market_data(),
self.broadcast_news(),
self.broadcast_sentiment(),
self.broadcast_whales(),
self.broadcast_gas_prices()
]
try:
await asyncio.gather(*tasks, return_exceptions=True)
except Exception as e:
logger.error(f"Error in broadcasting tasks: {e}", exc_info=True)
finally:
self.is_running = False
async def stop_broadcasting(self):
"""Stop broadcasting"""
logger.info("Stopping WebSocket data broadcaster...")
self.is_running = False
async def broadcast_market_data(self):
"""Broadcast market price updates"""
logger.info("Starting market data broadcast...")
while self.is_running:
try:
prices = db_manager.get_latest_prices(limit=50)
if prices:
# Format data for broadcast
data = {
"type": "market_data",
"data": {
"prices": {p.symbol: p.price_usd for p in prices},
"volumes": {p.symbol: p.volume_24h for p in prices if p.volume_24h},
"market_caps": {p.symbol: p.market_cap for p in prices if p.market_cap},
"price_changes": {p.symbol: p.price_change_24h for p in prices if p.price_change_24h}
},
"count": len(prices),
"timestamp": datetime.utcnow().isoformat()
}
# Broadcast to subscribed clients
await ws_manager.broadcast_to_service(ServiceType.MARKET_DATA, data)
logger.debug(f"Broadcasted {len(prices)} price updates")
except Exception as e:
logger.error(f"Error broadcasting market data: {e}", exc_info=True)
await asyncio.sleep(self.broadcast_interval)
async def broadcast_news(self):
"""Broadcast news updates"""
logger.info("Starting news broadcast...")
last_news_id = 0
while self.is_running:
try:
news = db_manager.get_latest_news(limit=10)
if news and (not last_news_id or news[0].id != last_news_id):
# New news available
last_news_id = news[0].id
data = {
"type": "news",
"data": {
"articles": [
{
"id": article.id,
"title": article.title,
"source": article.source,
"url": article.url,
"published_at": article.published_at.isoformat(),
"sentiment": article.sentiment
}
for article in news[:5] # Only send 5 latest
]
},
"count": len(news[:5]),
"timestamp": datetime.utcnow().isoformat()
}
await ws_manager.broadcast_to_service(ServiceType.NEWS, data)
logger.info(f"Broadcasted {len(news[:5])} news articles")
except Exception as e:
logger.error(f"Error broadcasting news: {e}", exc_info=True)
await asyncio.sleep(30) # Check every 30 seconds
async def broadcast_sentiment(self):
"""Broadcast sentiment updates"""
logger.info("Starting sentiment broadcast...")
last_sentiment_value = None
while self.is_running:
try:
sentiment = db_manager.get_latest_sentiment()
if sentiment and sentiment.value != last_sentiment_value:
last_sentiment_value = sentiment.value
data = {
"type": "sentiment",
"data": {
"fear_greed_index": sentiment.value,
"classification": sentiment.classification,
"metric_name": sentiment.metric_name,
"source": sentiment.source,
"timestamp": sentiment.timestamp.isoformat()
},
"timestamp": datetime.utcnow().isoformat()
}
await ws_manager.broadcast_to_service(ServiceType.SENTIMENT, data)
logger.info(f"Broadcasted sentiment: {sentiment.value} ({sentiment.classification})")
except Exception as e:
logger.error(f"Error broadcasting sentiment: {e}", exc_info=True)
await asyncio.sleep(60) # Check every minute
async def broadcast_whales(self):
"""Broadcast whale transaction updates"""
logger.info("Starting whale transaction broadcast...")
last_whale_id = 0
while self.is_running:
try:
whales = db_manager.get_whale_transactions(limit=5)
if whales and (not last_whale_id or whales[0].id != last_whale_id):
last_whale_id = whales[0].id
data = {
"type": "whale_transaction",
"data": {
"transactions": [
{
"id": tx.id,
"blockchain": tx.blockchain,
"amount_usd": tx.amount_usd,
"from_address": tx.from_address[:20] + "...",
"to_address": tx.to_address[:20] + "...",
"timestamp": tx.timestamp.isoformat()
}
for tx in whales
]
},
"count": len(whales),
"timestamp": datetime.utcnow().isoformat()
}
await ws_manager.broadcast_to_service(ServiceType.WHALE_TRACKING, data)
logger.info(f"Broadcasted {len(whales)} whale transactions")
except Exception as e:
logger.error(f"Error broadcasting whales: {e}", exc_info=True)
await asyncio.sleep(15) # Check every 15 seconds
async def broadcast_gas_prices(self):
"""Broadcast gas price updates"""
logger.info("Starting gas price broadcast...")
while self.is_running:
try:
gas_prices = db_manager.get_latest_gas_prices()
if gas_prices:
data = {
"type": "gas_prices",
"data": gas_prices,
"timestamp": datetime.utcnow().isoformat()
}
# Broadcast to RPC_NODES service type (gas prices are blockchain-related)
await ws_manager.broadcast_to_service(ServiceType.RPC_NODES, data)
logger.debug("Broadcasted gas prices")
except Exception as e:
logger.error(f"Error broadcasting gas prices: {e}", exc_info=True)
await asyncio.sleep(30) # Every 30 seconds
# Global broadcaster instance
broadcaster = DataBroadcaster()
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