fix: hooks not run in NOT_READY/FATAL (#1392)

* fix: hooks not run in NOT_READY/FATAL

Signed-off-by: Todd Baert <todd.baert@dynatrace.com>

---------

Signed-off-by: Todd Baert <todd.baert@dynatrace.com>

src/main/java/dev/openfeature/sdk/OpenFeatureClient.java

@@ -178,12 +178,6 @@ public class OpenFeatureClient implements Client {
             // provider must be accessed once to maintain a consistent reference
             provider = stateManager.getProvider();
             ProviderState state = stateManager.getState();
-            if (ProviderState.NOT_READY.equals(state)) {
-                throw new ProviderNotReadyError("provider not yet initialized");
-            }
-            if (ProviderState.FATAL.equals(state)) {
-                throw new FatalError("provider is in an irrecoverable error state");
-            }
 
             mergedHooks = ObjectUtils.merge(
                     provider.getProviderHooks(), flagOptions.getHooks(), clientHooks, openfeatureApi.getHooks());
@@ -203,6 +197,14 @@ public class OpenFeatureClient implements Client {
             afterHookContext =
                     HookContext.from(key, type, this.getMetadata(), provider.getMetadata(), mergedCtx, defaultValue);
 
+            // "short circuit" if the provider is in NOT_READY or FATAL state
+            if (ProviderState.NOT_READY.equals(state)) {
+                throw new ProviderNotReadyError("Provider not yet initialized");
+            }
+            if (ProviderState.FATAL.equals(state)) {
+                throw new FatalError("Provider is in an irrecoverable error state");
+            }
+
             ProviderEvaluation<T> providerEval =
                     (ProviderEvaluation<T>) createProviderEvaluation(type, key, defaultValue, provider, mergedCtx);
 

src/test/java/dev/openfeature/sdk/FatalErrorProvider.java

@@ -0,0 +1,45 @@
+package dev.openfeature.sdk;
+
+import dev.openfeature.sdk.exceptions.FatalError;
+import dev.openfeature.sdk.exceptions.GeneralError;
+
+public class FatalErrorProvider implements FeatureProvider {
+
+    private final String name = "fatal";
+
+    @Override
+    public Metadata getMetadata() {
+        return () -> name;
+    }
+
+    @Override
+    public void initialize(EvaluationContext evaluationContext) throws Exception {
+        throw new FatalError(); // throw a fatal error on startup (this will cause the SDK to short circuit evaluations)
+    }
+
+    @Override
+    public ProviderEvaluation<Boolean> getBooleanEvaluation(String key, Boolean defaultValue, EvaluationContext ctx) {
+        throw new GeneralError(TestConstants.BROKEN_MESSAGE);
+    }
+
+    @Override
+    public ProviderEvaluation<String> getStringEvaluation(String key, String defaultValue, EvaluationContext ctx) {
+        throw new GeneralError(TestConstants.BROKEN_MESSAGE);
+    }
+
+    @Override
+    public ProviderEvaluation<Integer> getIntegerEvaluation(String key, Integer defaultValue, EvaluationContext ctx) {
+        throw new GeneralError(TestConstants.BROKEN_MESSAGE);
+    }
+
+    @Override
+    public ProviderEvaluation<Double> getDoubleEvaluation(String key, Double defaultValue, EvaluationContext ctx) {
+        throw new GeneralError(TestConstants.BROKEN_MESSAGE);
+    }
+
+    @Override
+    public ProviderEvaluation<Value> getObjectEvaluation(
+            String key, Value defaultValue, EvaluationContext invocationContext) {
+        throw new GeneralError(TestConstants.BROKEN_MESSAGE);
+    }
+}

src/test/java/dev/openfeature/sdk/HookSpecTest.java

@@ -594,6 +594,25 @@ class HookSpecTest implements HookFixtures {
         assertThat(evaluationDetails.getValue()).isTrue();
     }
 
+    @Test
+    void shortCircuit_flagResolution_runsHooksWithAllFields() {
+        String domain = "shortCircuit_flagResolution_setsAppropriateFieldsInFlagEvaluationDetails";
+        api.setProvider(domain, new FatalErrorProvider());
+
+        Hook hook = mockBooleanHook();
+        String flagKey = "test-flag-key";
+        Client client = api.getClient(domain);
+        client.getBooleanValue(
+                flagKey,
+                true,
+                new ImmutableContext(),
+                FlagEvaluationOptions.builder().hook(hook).build());
+
+        verify(hook).before(any(), any());
+        verify(hook).error(any(HookContext.class), any(Exception.class), any(Map.class));
+        verify(hook).finallyAfter(any(HookContext.class), any(FlagEvaluationDetails.class), any(Map.class));
+    }
+
     @Test
     void successful_flagResolution_setsAppropriateFieldsInFlagEvaluationDetails() {
         Hook hook = mockBooleanHook();