Crash on startup with 1.3.3 for kotlin app not using reactor. Fixes #583

Author: bnasslahsen

springdoc-openapi-kotlin/src/main/java/org/springdoc/kotlin/SpringDocKotlinConfiguration.java

@@ -22,7 +22,6 @@
 import io.swagger.v3.core.util.Json;
 import kotlin.Deprecated;
 import kotlin.coroutines.Continuation;
-import kotlinx.coroutines.flow.Flow;
 
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.context.annotation.Bean;
@@ -38,8 +37,7 @@ public class SpringDocKotlinConfiguration {
 
 	static {
 		getConfig().addRequestWrapperToIgnore(Continuation.class)
-				.addDeprecatedType(Deprecated.class)
-				.addFluxWrapperToIgnore(Flow.class);
+				.addDeprecatedType(Deprecated.class);
 		Json.mapper().registerModule(new KotlinModule());
 	}
 

springdoc-openapi-kotlin/src/main/java/org/springdoc/kotlin/SpringDocKotlinxConfiguration.java

@@ -0,0 +1,21 @@
+package org.springdoc.kotlin;
+
+import kotlinx.coroutines.flow.Flow;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Configuration;
+
+import static org.springdoc.core.Constants.SPRINGDOC_ENABLED;
+import static org.springdoc.core.SpringDocUtils.getConfig;
+
+@ConditionalOnClass(Flow.class)
+@Configuration
+@ConditionalOnProperty(name = SPRINGDOC_ENABLED, matchIfMissing = true)
+public class SpringDocKotlinxConfiguration {
+
+	static {
+		getConfig().addFluxWrapperToIgnore(Flow.class);
+	}
+
+}

springdoc-openapi-kotlin/src/main/resources/META-INF/spring.factories

@@ -1,2 +1,3 @@
 org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
-org.springdoc.kotlin.SpringDocKotlinConfiguration
+org.springdoc.kotlin.SpringDocKotlinConfiguration,\
+org.springdoc.kotlin.SpringDocKotlinxConfiguration