OP-21771: springboot3 upgrade aftereffects swagger failed so migrating from SpringFox to SpringDoc.

kork-swagger/kork-swagger.gradle

@@ -1,14 +1,6 @@
 apply plugin: "java-library"
-
 dependencies {
   api(platform(project(":spinnaker-dependencies")))
-
-  api 'io.swagger.core.v3:swagger-annotations:2.2.8'
-
   implementation "com.google.guava:guava"
-  implementation "org.springframework.boot:spring-boot-autoconfigure"
-//  implementation 'io.springfox:springfox-swagger2:3.0.0'
- // implementation 'io.springfox:springfox-swagger-ui:3.0.0'
-implementation "io.springfox:springfox-boot-starter:3.0.0"
-
+  api('org.springdoc:springdoc-openapi-starter-webmvc-ui')
 }

kork-swagger/src/main/java/com/netflix/spinnaker/config/ApiWebMvcConfiguration.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2024 OpsMx.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.netflix.spinnaker.config;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.ByteArrayHttpMessageConverter;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+import org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration;
+
+import java.util.List;
+
+/**
+ * OP-21771:
+ * This configuration helps to decode the base64 response of /v3/api-docs and makes Swagger UI load the API docs properly. *
+ *
+ * At the service(child services to Kork) level, while registering converters, somehow the ordering of HttpMessageConverters is getting disturbed.
+ * This configuration aligns it properly and there by fix decoding issue of swagger responses.
+ *
+ * ref docs: https://github.com/springdoc/springdoc.github.io/issues/52
+ */
+@Configuration
+public class ApiWebMvcConfiguration extends DelegatingWebMvcConfiguration {
+
+  @Autowired
+  Jackson2ObjectMapperBuilder jacksonBuilder;
+
+  @Override
+  protected void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
+    var applicationContext = this.getApplicationContext();
+    if (applicationContext != null) {
+      jacksonBuilder.applicationContext(applicationContext);
+    }
+    converters.add(new ByteArrayHttpMessageConverter());
+    converters.add(new MappingJackson2HttpMessageConverter(jacksonBuilder.build()));
+  }
+}

spinnaker-dependencies/spinnaker-dependencies.gradle

@@ -29,7 +29,7 @@ ext {
     spek2            : "2.0.9",
     springBoot       : "3.0.9",
     springCloud      : "2022.0.2",
-    springfoxSwagger : "3.0.0",
+    springdocVersion : "2.0.3",
 
     // Spring boot 2.4.13 brings in 9.0.55.  Spring boot 2.5.14 brings in
     // 9.0.63.  Use 9.0.69 to resolve CVE-2022-42252 and CVE-2022-45143.  Spring
@@ -111,8 +111,6 @@ dependencies {
   api("com.netflix.spectator:spectator-reg-micrometer:${versions.spectator}")
   api("mysql:mysql-connector-java:8.0.28")
 
-  api ("io.springfox:springfox-boot-starter:3.0.0")
-
   constraints{
     api("org.yaml:snakeyaml:2.0")
     api("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.15.0")
@@ -145,5 +143,6 @@ dependencies {
     api("io.projectreactor.netty:reactor-netty-http:1.1.13")
     api("com.jayway.jsonpath:json-path:2.9.0")
     api("org.springframework:spring-webmvc:6.0.14")
+    api("org.springdoc:springdoc-openapi-starter-webmvc-ui:${versions.springdocVersion}")
   }
 }