refactor(di): improve cyclic dependency handling and error messages
- Replace `FrameworkException` with `ContainerException` in `CyclicDependencyException` - Add detection logic for cycle start and improved message formatting - Provide actionable resolution tips in error messages - Enhance `ClassResolutionException` to reuse `CyclicDependencyException` messages - Add context for available bindings when a cycle is detected
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@@ -32,8 +32,12 @@ final class ClassResolutionException extends ContainerException
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?FailedInitializer $failedInitializer = null,
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?string $matchingInitializer = null
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): self {
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// Spezialbehandlung für zyklische Abhängigkeiten
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if ($previous instanceof CyclicDependencyException) {
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// Nutze die verbesserte Meldung der CyclicDependencyException direkt
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$reason = $previous->getMessage();
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} elseif ($bindingType === 'callable' && ($failedInitializer !== null || $matchingInitializer !== null)) {
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// Für callable bindings: Spezielle Fehlermeldung wenn Initializer beteiligt ist
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if ($bindingType === 'callable' && ($failedInitializer !== null || $matchingInitializer !== null)) {
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$reason = "Initializer failed during execution.";
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} else {
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$reason = "Binding resolution failed (binding type: {$bindingType}): " . $previous->getMessage();
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@@ -65,9 +69,16 @@ final class ClassResolutionException extends ContainerException
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array $availableBindings,
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array $dependencyChain
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): self {
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// Spezialbehandlung für zyklische Abhängigkeiten
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// CyclicDependencyException extends FrameworkException extends RuntimeException,
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// daher wird es hier auch erkannt
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$reason = $exception instanceof CyclicDependencyException
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? $exception->getMessage()
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: $exception->getMessage();
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return new self(
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class: $class,
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reason: $exception->getMessage(),
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reason: $reason,
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availableBindings: $availableBindings,
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dependencyChain: $dependencyChain,
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previous: $exception
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@@ -91,8 +102,22 @@ final class ClassResolutionException extends ContainerException
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) {
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$dependencyChainStr = implode(' -> ', $dependencyChain);
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// Spezialbehandlung für zyklische Abhängigkeiten: Nutze die verbesserte Meldung direkt
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if ($previous instanceof CyclicDependencyException) {
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// Die CyclicDependencyException hat bereits eine übersichtliche Formatierung
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// Füge nur zusätzlichen Kontext hinzu, wenn relevant
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$message = $reason; // Nutze die bereits formatierte Meldung aus CyclicDependencyException
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// Füge zusätzliche Informationen nur hinzu, wenn sie hilfreich sind
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if (!empty($availableBindings)) {
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$message .= "\n\n";
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$message .= "📋 Verfügbare Bindings: " . implode(', ', array_slice($availableBindings, 0, 10));
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if (count($availableBindings) > 10) {
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$message .= " (und " . (count($availableBindings) - 10) . " weitere)";
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}
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}
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} elseif ($bindingType === 'callable' && ($this->failedInitializer !== null || $this->matchingInitializer !== null)) {
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// Für callable bindings mit fehlgeschlagenem Initializer: Detaillierte Fehlermeldung
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if ($bindingType === 'callable' && ($this->failedInitializer !== null || $this->matchingInitializer !== null)) {
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$message = "Cannot resolve class '{$class}': {$reason}\n\n";
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$message .= "⚠️ Initializer failed:\n";
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@@ -5,27 +5,83 @@ declare(strict_types=1);
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namespace App\Framework\DI\Exceptions;
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use App\Framework\Exception\ExceptionContext;
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use App\Framework\Exception\FrameworkException;
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final class CyclicDependencyException extends FrameworkException
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final class CyclicDependencyException extends ContainerException
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{
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private readonly array $cycle;
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private readonly string $cycleStart;
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public function __construct(
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array $dependencyChain,
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string $class,
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int $code = 0,
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?\Throwable $previous = null
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) {
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// Finde wo der Zyklus beginnt (erste Wiederholung in der Kette)
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$cycleStartIndex = array_search($class, $dependencyChain, true);
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if ($cycleStartIndex !== false) {
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// Extrahiere nur den Zyklus-Teil
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$this->cycle = array_slice($dependencyChain, $cycleStartIndex);
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$this->cycle[] = $class; // Schließe den Zyklus
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$this->cycleStart = $dependencyChain[$cycleStartIndex];
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} else {
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// Fallback: Verwende die gesamte Kette
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$this->cycle = array_merge($dependencyChain, [$class]);
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$this->cycleStart = $dependencyChain[0] ?? $class;
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}
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$context = ExceptionContext::forOperation('dependency_resolution', 'DI')
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->withData([
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'dependencyChain' => $dependencyChain,
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'class' => $class,
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'cycle' => $this->cycle,
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'cycleStart' => $this->cycleStart,
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]);
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$message = $this->buildMessage();
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// ContainerException erwartet message als ersten Parameter und optional context
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parent::__construct(
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message: 'Zyklische Abhängigkeit entdeckt: ' . implode(' -> ', $dependencyChain) . " -> $class",
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message: $message,
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context: $context,
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code: $code,
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previous: $previous
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);
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}
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private function buildMessage(): string
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{
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$cycleStr = implode(' → ', $this->cycle);
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$message = "🔄 Zyklische Abhängigkeit entdeckt:\n\n";
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$message .= " {$cycleStr}\n";
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$message .= " ↑─────────────────────┘\n";
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$message .= " Der Zyklus beginnt hier bei '{$this->cycleStart}'\n\n";
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// Füge hilfreiche Hinweise hinzu
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$message .= "💡 Lösungsvorschläge:\n";
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$message .= " • Verwende Lazy Loading für eine der Abhängigkeiten\n";
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$message .= " • Füge eine Factory zwischen die Klassen ein\n";
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$message .= " • Refactoriere die Abhängigkeitsstruktur (Dependency Inversion)\n";
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$message .= " • Verwende Event-basierte Kommunikation statt direkter Abhängigkeit\n";
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return $message;
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}
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/**
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* Get the detected cycle (without full dependency chain)
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*/
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public function getCycle(): array
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{
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return $this->cycle;
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}
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/**
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* Get the class where the cycle starts
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*/
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public function getCycleStart(): string
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{
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return $this->cycleStart;
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}
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}
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