96 lines
2.6 KiB
Go
Executable file
96 lines
2.6 KiB
Go
Executable file
package database
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import (
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"database/sql"
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"fmt"
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"log"
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"os"
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"strings"
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"time"
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_ "github.com/lib/pq"
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)
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var DB *sql.DB
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func InitDB() {
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var err error
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connStr, err := BuildConnectionString()
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if err != nil {
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log.Fatalf("Configuration error: %v", err)
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}
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DB, err = sql.Open("postgres", connStr)
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if err != nil {
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log.Fatalf("Error opening database: %v", err)
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}
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// Connection Pool Settings
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// Adjust these values based on your production load and database resources
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DB.SetMaxOpenConns(25) // Limit total connections
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DB.SetMaxIdleConns(25) // Keep connections open for reuse
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DB.SetConnMaxLifetime(5 * time.Minute) // Recycle connections every 5 min (avoids stale connections dropped by firewalls)
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DB.SetConnMaxIdleTime(5 * time.Minute) // Close idle connections after 5 min
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if err = DB.Ping(); err != nil {
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log.Fatalf("Error connecting to database: %v", err)
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}
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log.Println("✅ Successfully connected to the database")
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}
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func BuildConnectionString() (string, error) {
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if dbURL := os.Getenv("DATABASE_URL"); dbURL != "" {
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log.Println("Using DATABASE_URL for connection")
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return dbURL, nil
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}
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return "", fmt.Errorf("DATABASE_URL environment variable not set")
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}
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func RunMigrations() {
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files, err := os.ReadDir("migrations")
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if err != nil {
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// Try fallback to relative path if running from cmd/api
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files, err = os.ReadDir("../../migrations")
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if err != nil {
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log.Printf("⚠️ Warning: Could not list migrations directory: %v", err)
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return
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}
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}
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// Sort files by name to ensure order (001, 002, ...)
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// ReadDir returns sorted by name automatically, but let's be safe if logic changes?
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// Actually ReadDir result is sorted by filename.
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for _, file := range files {
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if file.IsDir() {
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continue
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}
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log.Printf("📦 Running migration: %s", file.Name())
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content, err := os.ReadFile("migrations/" + file.Name())
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if err != nil {
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// Try fallback
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content, err = os.ReadFile("../../migrations/" + file.Name())
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if err != nil {
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log.Fatalf("❌ Error reading migration file %s: %v", file.Name(), err)
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}
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}
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_, err = DB.Exec(string(content))
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if err != nil {
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errStr := err.Error()
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// Check if it's an "already exists" error - these are safe to skip
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if strings.Contains(errStr, "already exists") {
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log.Printf("⏭️ Migration %s skipped (already applied)", file.Name())
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} else {
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// Real error - log it
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log.Printf("❌ Error running migration %s: %v", file.Name(), err)
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}
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} else {
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log.Printf("✅ Migration %s executed successfully", file.Name())
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}
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}
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log.Println("All migrations processed")
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}
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