[Java][Jersey2] Make generated client code thread safe

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

@@ -229,7 +229,11 @@ public void processOpts() {
             if ("retrofit2".equals(getLibrary()) && !usePlayWS) {
                 supportingFiles.add(new SupportingFile("JSON.mustache", invokerFolder, "JSON.java"));
             }
-        } else if ("jersey2".equals(getLibrary()) || "resteasy".equals(getLibrary()))  {
+        } else if ("jersey2".equals(getLibrary())) {
+            supportingFiles.add(new SupportingFile("JSON.mustache", invokerFolder, "JSON.java"));
+            supportingFiles.add(new SupportingFile("ApiResponse.mustache", invokerFolder, "ApiResponse.java"));
+            additionalProperties.put("jackson", "true");
+        } else if ("resteasy".equals(getLibrary()))  {
             supportingFiles.add(new SupportingFile("JSON.mustache", invokerFolder, "JSON.java"));
             additionalProperties.put("jackson", "true");
         } else if("jersey1".equals(getLibrary())) {

modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache

@@ -70,9 +70,6 @@ public class ApiClient {
 
   protected Map<String, Authentication> authentications;
 
-  protected int statusCode;
-  protected Map<String, List<String>> responseHeaders;
-
   protected DateFormat dateFormat;
 
   public ApiClient() {
@@ -119,22 +116,6 @@ public class ApiClient {
     return this;
   }
 
-  /**
-   * Gets the status code of the previous request
-   * @return Status code
-   */
-  public int getStatusCode() {
-    return statusCode;
-  }
-
-  /**
-   * Gets the response headers of the previous request
-   * @return Response headers
-   */
-  public Map<String, List<String>> getResponseHeaders() {
-    return responseHeaders;
-  }
-
   /**
    * Get authentications (key: authentication name, value: authentication).
    * @return Map of authentication object
@@ -669,7 +650,7 @@ public class ApiClient {
    * @return The response body in type of string
    * @throws ApiException API exception
    */
-  public <T> T invokeAPI(String path, String method, List<Pair> queryParams, Object body, Map<String, String> headerParams, Map<String, Object> formParams, String accept, String contentType, String[] authNames, GenericType<T> returnType) throws ApiException {
+  public <T> ApiResponse<T> invokeAPI(String path, String method, List<Pair> queryParams, Object body, Map<String, String> headerParams, Map<String, Object> formParams, String accept, String contentType, String[] authNames, GenericType<T> returnType) throws ApiException {
     updateParamsForAuth(authNames, queryParams, headerParams);
 
     // Not using `.target(this.basePath).path(path)` below,
@@ -724,16 +705,16 @@ public class ApiClient {
         throw new ApiException(500, "unknown method type " + method);
       }
 
-      statusCode = response.getStatusInfo().getStatusCode();
-      responseHeaders = buildResponseHeaders(response);
+      int statusCode = response.getStatusInfo().getStatusCode();
+      Map<String, List<String>> responseHeaders = buildResponseHeaders(response);
 
       if (response.getStatus() == Status.NO_CONTENT.getStatusCode()) {
-        return null;
+        return new ApiResponse<>(statusCode, responseHeaders);
       } else if (response.getStatusInfo().getFamily() == Status.Family.SUCCESSFUL) {
         if (returnType == null)
-          return null;
+          return new ApiResponse<>(statusCode, responseHeaders);
         else
-          return deserialize(response, returnType);
+          return new ApiResponse<>(statusCode, responseHeaders, deserialize(response, returnType));
       } else {
         String message = "error";
         String respBody = null;

modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiResponse.mustache

@@ -0,0 +1,48 @@
+{{>licenseInfo}}
+
+package {{invokerPackage}};
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API response returned by API call.
+ *
+ * @param <T> The type of data that is deserialized from response body
+ */
+public class ApiResponse<T> {
+    private final int statusCode;
+    private final Map<String, List<String>> headers;
+    private final T data;
+
+    /**
+     * @param statusCode The status code of HTTP response
+     * @param headers The headers of HTTP response
+     */
+    public ApiResponse(int statusCode, Map<String, List<String>> headers) {
+        this(statusCode, headers, null);
+    }
+
+    /**
+     * @param statusCode The status code of HTTP response
+     * @param headers The headers of HTTP response
+     * @param data The object deserialized from response bod
+     */
+    public ApiResponse(int statusCode, Map<String, List<String>> headers, T data) {
+        this.statusCode = statusCode;
+        this.headers = headers;
+        this.data = data;
+    }
+
+    public int getStatusCode() {
+        return statusCode;
+    }
+
+    public Map<String, List<String>> getHeaders() {
+        return headers;
+    }
+
+    public T getData() {
+        return data;
+    }
+}

modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/api.mustache

@@ -2,6 +2,7 @@ package {{package}};
 
 import {{invokerPackage}}.ApiException;
 import {{invokerPackage}}.ApiClient;
+import {{invokerPackage}}.ApiResponse;
 import {{invokerPackage}}.Configuration;
 import {{invokerPackage}}.Pair;
 
@@ -61,6 +62,35 @@ public class {{classname}} {
   @Deprecated
   {{/isDeprecated}}
   public {{#returnType}}{{{returnType}}} {{/returnType}}{{^returnType}}void {{/returnType}}{{operationId}}({{#allParams}}{{{dataType}}} {{paramName}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) throws ApiException {
+    {{#returnType}}
+    return {{operationId}}WithHttpInfo({{#allParams}}{{paramName}}{{#hasMore}}, {{/hasMore}}{{/allParams}}).getData();
+    {{/returnType}}{{^returnType}}
+    {{operationId}}WithHttpInfo({{#allParams}}{{paramName}}{{#hasMore}}, {{/hasMore}}{{/allParams}});
+    {{/returnType}}
+  }
+
+  /**
+   * {{summary}}
+   * {{notes}}
+   {{#allParams}}
+   * @param {{paramName}} {{description}}{{#required}} (required){{/required}}{{^required}} (optional{{#defaultValue}}, default to {{{.}}}{{/defaultValue}}){{/required}}
+   {{/allParams}}
+   {{#returnType}}
+   * @return ApiResponse<{{#returnType}}{{returnType}}{{/returnType}}{{^returnType}}Void{{/returnType}}>
+   {{/returnType}}
+   * @throws ApiException if fails to make API call
+   {{#isDeprecated}}
+   * @deprecated
+   {{/isDeprecated}}
+   {{#externalDocs}}
+   * {{description}}
+   * @see <a href="{{url}}">{{summary}} Documentation</a>
+   {{/externalDocs}}
+   */
+  {{#isDeprecated}}
+  @Deprecated
+  {{/isDeprecated}}
+  public ApiResponse<{{#returnType}}{{{returnType}}}{{/returnType}}{{^returnType}}Void{{/returnType}}> {{operationId}}WithHttpInfo({{#allParams}}{{{dataType}}} {{paramName}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) throws ApiException {
     Object {{localVariablePrefix}}localVarPostBody = {{#bodyParam}}{{paramName}}{{/bodyParam}}{{^bodyParam}}null{{/bodyParam}};
     {{#allParams}}{{#required}}
     // verify the required parameter '{{paramName}}' is set
@@ -105,7 +135,7 @@ public class {{classname}} {
     GenericType<{{{returnType}}}> {{localVariablePrefix}}localVarReturnType = new GenericType<{{{returnType}}}>() {};
     return {{localVariablePrefix}}apiClient.invokeAPI({{localVariablePrefix}}localVarPath, "{{httpMethod}}", {{localVariablePrefix}}localVarQueryParams, {{localVariablePrefix}}localVarPostBody, {{localVariablePrefix}}localVarHeaderParams, {{localVariablePrefix}}localVarFormParams, {{localVariablePrefix}}localVarAccept, {{localVariablePrefix}}localVarContentType, {{localVariablePrefix}}localVarAuthNames, {{localVariablePrefix}}localVarReturnType);
     {{/returnType}}{{^returnType}}
-    {{localVariablePrefix}}apiClient.invokeAPI({{localVariablePrefix}}localVarPath, "{{httpMethod}}", {{localVariablePrefix}}localVarQueryParams, {{localVariablePrefix}}localVarPostBody, {{localVariablePrefix}}localVarHeaderParams, {{localVariablePrefix}}localVarFormParams, {{localVariablePrefix}}localVarAccept, {{localVariablePrefix}}localVarContentType, {{localVariablePrefix}}localVarAuthNames, null);
+    return {{localVariablePrefix}}apiClient.invokeAPI({{localVariablePrefix}}localVarPath, "{{httpMethod}}", {{localVariablePrefix}}localVarQueryParams, {{localVariablePrefix}}localVarPostBody, {{localVariablePrefix}}localVarHeaderParams, {{localVariablePrefix}}localVarFormParams, {{localVariablePrefix}}localVarAccept, {{localVariablePrefix}}localVarContentType, {{localVariablePrefix}}localVarAuthNames, null);
     {{/returnType}}
   }
   {{/operation}}

samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/ApiClient.java

@@ -64,9 +64,6 @@ public class ApiClient {
 
   protected Map<String, Authentication> authentications;
 
-  protected int statusCode;
-  protected Map<String, List<String>> responseHeaders;
-
   protected DateFormat dateFormat;
 
   public ApiClient() {
@@ -114,22 +111,6 @@ public ApiClient setBasePath(String basePath) {
     return this;
   }
 
-  /**
-   * Gets the status code of the previous request
-   * @return Status code
-   */
-  public int getStatusCode() {
-    return statusCode;
-  }
-
-  /**
-   * Gets the response headers of the previous request
-   * @return Response headers
-   */
-  public Map<String, List<String>> getResponseHeaders() {
-    return responseHeaders;
-  }
-
   /**
    * Get authentications (key: authentication name, value: authentication).
    * @return Map of authentication object
@@ -658,7 +639,7 @@ public File prepareDownloadFile(Response response) throws IOException {
    * @return The response body in type of string
    * @throws ApiException API exception
    */
-  public <T> T invokeAPI(String path, String method, List<Pair> queryParams, Object body, Map<String, String> headerParams, Map<String, Object> formParams, String accept, String contentType, String[] authNames, GenericType<T> returnType) throws ApiException {
+  public <T> ApiResponse<T> invokeAPI(String path, String method, List<Pair> queryParams, Object body, Map<String, String> headerParams, Map<String, Object> formParams, String accept, String contentType, String[] authNames, GenericType<T> returnType) throws ApiException {
     updateParamsForAuth(authNames, queryParams, headerParams);
 
     // Not using `.target(this.basePath).path(path)` below,
@@ -713,16 +694,16 @@ public <T> T invokeAPI(String path, String method, List<Pair> queryParams, Objec
         throw new ApiException(500, "unknown method type " + method);
       }
 
-      statusCode = response.getStatusInfo().getStatusCode();
-      responseHeaders = buildResponseHeaders(response);
+      int statusCode = response.getStatusInfo().getStatusCode();
+      Map<String, List<String>> responseHeaders = buildResponseHeaders(response);
 
       if (response.getStatus() == Status.NO_CONTENT.getStatusCode()) {
-        return null;
+        return new ApiResponse<>(statusCode, responseHeaders);
       } else if (response.getStatusInfo().getFamily() == Status.Family.SUCCESSFUL) {
         if (returnType == null)
-          return null;
+          return new ApiResponse<>(statusCode, responseHeaders);
         else
-          return deserialize(response, returnType);
+          return new ApiResponse<>(statusCode, responseHeaders, deserialize(response, returnType));
       } else {
         String message = "error";
         String respBody = null;

samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/ApiResponse.java

@@ -0,0 +1,59 @@
+/*
+ * Swagger Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: [email protected]
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ */
+
+
+package io.swagger.client;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API response returned by API call.
+ *
+ * @param <T> The type of data that is deserialized from response body
+ */
+public class ApiResponse<T> {
+    private final int statusCode;
+    private final Map<String, List<String>> headers;
+    private final T data;
+
+    /**
+     * @param statusCode The status code of HTTP response
+     * @param headers The headers of HTTP response
+     */
+    public ApiResponse(int statusCode, Map<String, List<String>> headers) {
+        this(statusCode, headers, null);
+    }
+
+    /**
+     * @param statusCode The status code of HTTP response
+     * @param headers The headers of HTTP response
+     * @param data The object deserialized from response bod
+     */
+    public ApiResponse(int statusCode, Map<String, List<String>> headers, T data) {
+        this.statusCode = statusCode;
+        this.headers = headers;
+        this.data = data;
+    }
+
+    public int getStatusCode() {
+        return statusCode;
+    }
+
+    public Map<String, List<String>> getHeaders() {
+        return headers;
+    }
+
+    public T getData() {
+        return data;
+    }
+}

samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/api/AnotherFakeApi.java

@@ -2,6 +2,7 @@
 
 import io.swagger.client.ApiException;
 import io.swagger.client.ApiClient;
+import io.swagger.client.ApiResponse;
 import io.swagger.client.Configuration;
 import io.swagger.client.Pair;
 
@@ -42,6 +43,17 @@ public void setApiClient(ApiClient apiClient) {
    * @throws ApiException if fails to make API call
    */
   public Client testSpecialTags(Client body) throws ApiException {
+    return testSpecialTagsWithHttpInfo(body).getData();
+      }
+
+  /**
+   * To test special tags
+   * To test special tags
+   * @param body client model (required)
+   * @return ApiResponse<Client>
+   * @throws ApiException if fails to make API call
+   */
+  public ApiResponse<Client> testSpecialTagsWithHttpInfo(Client body) throws ApiException {
     Object localVarPostBody = body;
 
     // verify the required parameter 'body' is set