start-memory-optimized.sh

#!/bin/bash

# Memory-Optimized PulseEvents Startup Script
# This script starts the application with aggressive memory optimization
# Target: 512MB total memory usage

echo "🚀 Starting PulseEvents with Memory Optimization..."
echo "📊 Target Total Memory: 512MB"
echo ""

# Check if Docker is running
if ! docker info >/dev/null 2>&1; then
    echo "❌ Docker is not running. Please start Docker first."
    exit 1
fi

# Set memory optimization profile
export SPRING_PROFILES_ACTIVE=docker,memory-optimized

# Set JWT secret if not already set
if [ -z "$JWT_SECRET" ]; then
    export JWT_SECRET="your-super-secret-jwt-key-that-is-at-least-256-bits-long-for-hmac-sha256"
    echo "⚠️  Using default JWT secret. Set JWT_SECRET environment variable for production."
fi

# Check available system memory
AVAILABLE_MEMORY=$(free -m | awk 'NR==2{printf "%.0f", $7}')
echo "💾 Available System Memory: ${AVAILABLE_MEMORY}MB"

if [ "$AVAILABLE_MEMORY" -lt 1024 ]; then
    echo "⚠️  WARNING: Low system memory detected. This setup requires at least 1GB of available memory."
    echo "   Consider stopping other applications or increasing system memory."
fi

echo ""
echo "📋 Memory Allocation Plan:"
echo "   • PostgreSQL:      64MB (limit)"
echo "   • Discovery Server: 80MB (limit)"
echo "   • Config Server:    80MB (limit)"
echo "   • Auth Service:     96MB (limit)"
echo "   • Event Service:    96MB (limit)"
echo "   • Booking Service:  96MB (limit)"
echo "   • API Gateway:      80MB (limit)"
echo "   • Frontend:         16MB (limit)"
echo "   ═══════════════════════════════"
echo "   • TOTAL:           608MB (with safety margin)"
echo ""

# Stop any existing containers
echo "🛑 Stopping existing containers..."
docker-compose -f docker-compose.yml down --remove-orphans 2>/dev/null || true
docker-compose -f docker-compose.memory-optimized.yml down --remove-orphans 2>/dev/null || true

# Start with memory-optimized configuration
echo "🏗️  Building and starting memory-optimized containers..."
docker-compose -f docker-compose.memory-optimized.yml up --build -d

# Wait for services to start
echo "⏳ Waiting for services to start..."
sleep 30

# Check service health
echo ""
echo "🔍 Checking service health..."

services=("discovery-server:8761" "config-server:8888" "authentication-service:8091" "event-service:8082" "booking-service:8083" "api-gateway:8080" "frontend:5173")

for service in "${services[@]}"; do
    IFS=':' read -r name port <<< "$service"
    if curl -f -s http://localhost:$port/actuator/health >/dev/null 2>&1 || curl -f -s http://localhost:$port/ >/dev/null 2>&1; then
        echo "✅ $name is healthy"
    else
        echo "❌ $name is not responding"
    fi
done

echo ""
echo "📊 Current Memory Usage:"
docker stats --no-stream --format "table {{.Name}}\t{{.MemUsage}}\t{{.MemPerc}}"

echo ""
echo "🎉 Memory-optimized PulseEvents is starting!"
echo "🌐 Access the application at: http://localhost:5173"
echo "📊 Monitor memory usage with: docker stats"
echo ""
echo "💡 Tips for further optimization:"
echo "   • Monitor memory usage regularly"
echo "   • Adjust JVM heap sizes if needed"
echo "   • Consider using Alpine-based images"
echo "   • Profile application under load"
echo ""