issue-9118_Enable_code_generation_for_openfeign_with_spring-boot_2: additional property and template adaption

Author: Tobias Buhr

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/SpringCodegen.java

@@ -33,6 +33,7 @@ public class SpringCodegen extends AbstractJavaCodegen
     public static final String SPRING_CLOUD_LIBRARY = "spring-cloud";
     public static final String IMPLICIT_HEADERS = "implicitHeaders";
     public static final String SWAGGER_DOCKET_CONFIG = "swaggerDocketConfig";
+    public static final String TARGET_OPENFEIGN = "generateForOpenFeign";
 
     protected String title = "swagger-petstore";
     protected String configPackage = "io.swagger.configuration";
@@ -49,6 +50,7 @@ public class SpringCodegen extends AbstractJavaCodegen
     protected boolean implicitHeaders = false;
     protected boolean swaggerDocketConfig = false;
     protected boolean useOptional = false;
+    protected boolean openFeign = false;
 
     public SpringCodegen() {
         super();
@@ -81,6 +83,7 @@ public SpringCodegen() {
         cliOptions.add(CliOption.newBoolean(SWAGGER_DOCKET_CONFIG, "Generate Spring Swagger Docket configuration class."));
         cliOptions.add(CliOption.newBoolean(USE_OPTIONAL,
                 "Use Optional container for optional parameters"));
+        cliOptions.add(CliOption.newBoolean(TARGET_OPENFEIGN,"Generate for usage with OpenFeign (instead of feign)"));
 
         supportedLibraries.put(DEFAULT_LIBRARY, "Spring-boot Server application using the SpringFox integration.");
         supportedLibraries.put(SPRING_MVC_LIBRARY, "Spring-MVC Server application using the SpringFox integration.");
@@ -178,7 +181,7 @@ public void processOpts() {
         if (additionalProperties.containsKey(USE_TAGS)) {
             this.setUseTags(Boolean.valueOf(additionalProperties.get(USE_TAGS).toString()));
         }
-        
+
         if (additionalProperties.containsKey(USE_BEANVALIDATION)) {
             this.setUseBeanValidation(convertPropertyToBoolean(USE_BEANVALIDATION));
         }
@@ -187,6 +190,10 @@ public void processOpts() {
             this.setUseOptional(convertPropertyToBoolean(USE_OPTIONAL));
         }
 
+        if (additionalProperties.containsKey(TARGET_OPENFEIGN)) {
+            this.setOpenFeign(convertPropertyToBoolean(TARGET_OPENFEIGN));
+        }
+
         if (useBeanValidation) {
             writePropertyBack(USE_BEANVALIDATION, useBeanValidation);
         }
@@ -201,7 +208,7 @@ public void processOpts() {
 
         typeMapping.put("file", "Resource");
         importMapping.put("Resource", "org.springframework.core.io.Resource");
-        
+
         if (useOptional) {
             writePropertyBack(USE_OPTIONAL, useOptional);
         }
@@ -280,7 +287,7 @@ public void processOpts() {
                         (sourceFolder + File.separator + configPackage).replace(".", java.io.File.separator), "JacksonConfiguration.java"));
             }
         }
-        
+
         if ((!this.delegatePattern && this.java8) || this.delegateMethod) {
             additionalProperties.put("jdk8-no-delegate", true);
         }
@@ -301,6 +308,10 @@ public void processOpts() {
             additionalProperties.put(RESPONSE_WRAPPER, "Callable");
         }
 
+        if(this.openFeign){
+            additionalProperties.put("isOpenFeign", "true");
+        }
+
         // Some well-known Spring or Spring-Cloud response wrappers
         switch (this.responseWrapper) {
             case "Future":
@@ -673,7 +684,7 @@ public Map<String, Object> postProcessModelsEnum(Map<String, Object> objs) {
 
         return objs;
     }
-    
+
     public void setUseBeanValidation(boolean useBeanValidation) {
         this.useBeanValidation = useBeanValidation;
     }
@@ -682,4 +693,8 @@ public void setUseBeanValidation(boolean useBeanValidation) {
     public void setUseOptional(boolean useOptional) {
         this.useOptional = useOptional;
     }
+
+    public void setOpenFeign(boolean openFeign) {
+        this.openFeign = openFeign;
+    }
 }

modules/swagger-codegen/src/main/resources/JavaSpring/libraries/spring-cloud/apiClient.mustache

@@ -1,6 +1,11 @@
 package {{package}};
 
-import org.springframework.cloud.netflix.feign.FeignClient;
+{{^isOpenFeign}}
+    import org.springframework.cloud.netflix.feign.FeignClient;
+{{/isOpenFeign}}
+{{#isOpenFeign}}
+    import org.springframework.cloud.openfeign.FeignClient;
+{{/isOpenFeign}}
 import {{configPackage}}.ClientConfiguration;
 
 {{=<% %>=}}

modules/swagger-codegen/src/test/java/io/swagger/codegen/options/SpringOptionsProvider.java

@@ -22,6 +22,7 @@ public class SpringOptionsProvider extends JavaOptionsProvider {
     public static final String IMPLICIT_HEADERS = "false";
     public static final String SWAGGER_DOCKET_CONFIG = "false";
     public static final String USE_OPTIONAL = "false";
+    public static final String TARGET_OPENFEIGN = "false";
 
     @Override
     public String getLanguage() {
@@ -46,6 +47,7 @@ public Map<String, String> createOptions() {
         options.put(SpringCodegen.IMPLICIT_HEADERS, IMPLICIT_HEADERS);
         options.put(SpringCodegen.SWAGGER_DOCKET_CONFIG, SWAGGER_DOCKET_CONFIG);
         options.put(SpringCodegen.USE_OPTIONAL, USE_OPTIONAL);
+        options.put(SpringCodegen.TARGET_OPENFEIGN, TARGET_OPENFEIGN);
 
         return options;
     }