feat: user service

2026-04-10 19:05:02 +02:00
parent 710bad712e
commit 23ffcb7535
140 changed files with 33418 additions and 952 deletions
@@ -0,0 +1,133 @@
+// Package adminapi exposes the optional private admin HTTP listener used for
+// operational endpoints such as Prometheus metrics.
+package adminapi
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log/slog"
+	"net"
+	"net/http"
+	"sync"
+
+	"galaxy/user/internal/config"
+)
+
+// Server owns the optional admin HTTP listener exposed by the user service.
+type Server struct {
+	cfg     config.AdminHTTPConfig
+	handler http.Handler
+	logger  *slog.Logger
+
+	stateMu  sync.RWMutex
+	server   *http.Server
+	listener net.Listener
+}
+
+// NewServer constructs an admin HTTP server for cfg and handler.
+func NewServer(cfg config.AdminHTTPConfig, handler http.Handler, logger *slog.Logger) *Server {
+	if handler == nil {
+		handler = http.NotFoundHandler()
+	}
+	if logger == nil {
+		logger = slog.Default()
+	}
+	mux := http.NewServeMux()
+	mux.Handle("GET /metrics", handler)
+
+	return &Server{
+		cfg:     cfg,
+		handler: mux,
+		logger:  logger.With("component", "admin_http"),
+	}
+}
+
+// Enabled reports whether the admin listener should run.
+func (server *Server) Enabled() bool {
+	return server != nil && server.cfg.Addr != ""
+}
+
+// Run binds the configured listener and serves the admin HTTP surface until
+// Shutdown closes the server. A disabled admin server returns when ctx is
+// canceled.
+func (server *Server) Run(ctx context.Context) error {
+	if ctx == nil {
+		return errors.New("run admin HTTP server: nil context")
+	}
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	if !server.Enabled() {
+		<-ctx.Done()
+		return nil
+	}
+
+	listener, err := net.Listen("tcp", server.cfg.Addr)
+	if err != nil {
+		return fmt.Errorf("run admin HTTP server: listen on %q: %w", server.cfg.Addr, err)
+	}
+
+	httpServer := &http.Server{
+		Handler:           server.handler,
+		ReadHeaderTimeout: server.cfg.ReadHeaderTimeout,
+		ReadTimeout:       server.cfg.ReadTimeout,
+		IdleTimeout:       server.cfg.IdleTimeout,
+	}
+
+	server.stateMu.Lock()
+	server.server = httpServer
+	server.listener = listener
+	server.stateMu.Unlock()
+
+	server.logger.Info("admin HTTP server started", "addr", listener.Addr().String())
+
+	shutdownDone := make(chan struct{})
+	go func() {
+		defer close(shutdownDone)
+		<-ctx.Done()
+		shutdownCtx, cancel := context.WithTimeout(context.Background(), server.cfg.ReadTimeout)
+		defer cancel()
+		_ = server.Shutdown(shutdownCtx)
+	}()
+
+	defer func() {
+		server.stateMu.Lock()
+		server.server = nil
+		server.listener = nil
+		server.stateMu.Unlock()
+		<-shutdownDone
+	}()
+
+	err = httpServer.Serve(listener)
+	switch {
+	case err == nil:
+		return nil
+	case errors.Is(err, http.ErrServerClosed):
+		server.logger.Info("admin HTTP server stopped")
+		return nil
+	default:
+		return fmt.Errorf("run admin HTTP server: serve on %q: %w", server.cfg.Addr, err)
+	}
+}
+
+// Shutdown gracefully stops the admin HTTP server within ctx.
+func (server *Server) Shutdown(ctx context.Context) error {
+	if ctx == nil {
+		return errors.New("shutdown admin HTTP server: nil context")
+	}
+
+	server.stateMu.RLock()
+	httpServer := server.server
+	server.stateMu.RUnlock()
+
+	if httpServer == nil {
+		return nil
+	}
+
+	if err := httpServer.Shutdown(ctx); err != nil && !errors.Is(err, http.ErrServerClosed) {
+		return fmt.Errorf("shutdown admin HTTP server: %w", err)
+	}
+
+	return nil
+}