Add Future to ignored response wrappers. Fixes #2917.

Author: bnasslahsen

springdoc-openapi-starter-common/src/main/java/org/springdoc/core/configuration/SpringDocConfiguration.java

@@ -34,6 +34,7 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
+import java.util.concurrent.Future;
 
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.querydsl.core.types.Predicate;
@@ -153,7 +154,8 @@ public class SpringDocConfiguration {
 	static {
 		getConfig().replaceWithSchema(ObjectNode.class, new ObjectSchema())
 				.replaceWithClass(Charset.class, String.class)
-				.addResponseWrapperToIgnore(DeferredResult.class);
+				.addResponseWrapperToIgnore(DeferredResult.class) 
+				.addResponseWrapperToIgnore(Future.class);
 	}
 
 	/**

springdoc-openapi-starter-webmvc-api/src/test/java/test/org/springdoc/api/v31/app129/HelloController.java

@@ -24,6 +24,8 @@
 
 package test.org.springdoc.api.v31.app129;
 
+import java.util.concurrent.CompletableFuture;
+
 import io.swagger.v3.oas.annotations.responses.ApiResponse;
 import io.swagger.v3.oas.annotations.responses.ApiResponses;
 
@@ -43,4 +45,11 @@ public DeferredResult<OperationResponse<ActualReturnedEntity>> update(
 			@RequestBody ActualReturnedEntity entity) throws Exception {
 		return null;
 	}
+
+	@PostMapping("/test2")
+	@ApiResponses({ @ApiResponse(responseCode = "200") })
+	public CompletableFuture<OperationResponse<ActualReturnedEntity>> update2(
+			@RequestBody ActualReturnedEntity entity) throws Exception {
+		return null;
+	}
 }

springdoc-openapi-starter-webmvc-api/src/test/resources/results/3.1.0/app129.json

@@ -56,6 +56,52 @@
           }
         }
       }
+    },
+    "/api/test2": {
+      "post": {
+        "tags": [
+          "hello-controller"
+        ],
+        "operationId": "update2",
+        "parameters": [
+          {
+            "name": "userId",
+            "in": "header",
+            "schema": {
+              "type": "string"
+            }
+          },
+          {
+            "name": "registrationId",
+            "in": "header",
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/ActualReturnedEntity"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "*/*": {
+                "schema": {
+                  "$ref": "#/components/schemas/OperationResponseActualReturnedEntity"
+                }
+              }
+            }
+          }
+        }
+      }
     }
   },
   "components": {