From a0521b77e751e8c38bba0050d90e35f513743fc0 Mon Sep 17 00:00:00 2001
From: Matheus Cruz <matheuscruz.dev@gmail.com>
Date: Thu, 12 Dec 2024 19:02:15 -0300
Subject: [PATCH] Add initial openapi module

Signed-off-by: Matheus Cruz <matheuscruz.dev@gmail.com>
---
 .../impl/WorkflowUtils.java                   |   14 +
 impl/openapi/pom.xml                          |   43 +
 .../impl/executors/OpenAPIExecutor.java       |  142 +++
 .../impl/executors/OpenAPIReader.java         |   60 +
 ...erlessworkflow.impl.executors.CallableTask |    1 +
 .../impl/OpenAPIWorkflowDefinitionTest.java   |   50 +
 .../src/test/resources/findPetsByStatus.yaml  |   14 +
 impl/openapi/src/test/resources/pets.json     | 1054 +++++++++++++++++
 impl/pom.xml                                  |    7 +-
 9 files changed, 1382 insertions(+), 3 deletions(-)
 create mode 100644 impl/openapi/pom.xml
 create mode 100644 impl/openapi/src/main/java/io/serverlessworkflow/impl/executors/OpenAPIExecutor.java
 create mode 100644 impl/openapi/src/main/java/io/serverlessworkflow/impl/executors/OpenAPIReader.java
 create mode 100644 impl/openapi/src/main/resources/META-INF/services/io.serverlessworkflow.impl.executors.CallableTask
 create mode 100644 impl/openapi/src/test/java/io/serverlessworkflow/impl/OpenAPIWorkflowDefinitionTest.java
 create mode 100644 impl/openapi/src/test/resources/findPetsByStatus.yaml
 create mode 100644 impl/openapi/src/test/resources/pets.json

diff --git a/impl/core/src/main/java/io/serverlessworkflow/impl/WorkflowUtils.java b/impl/core/src/main/java/io/serverlessworkflow/impl/WorkflowUtils.java
index 0866ba05..7a9f6843 100644
--- a/impl/core/src/main/java/io/serverlessworkflow/impl/WorkflowUtils.java
+++ b/impl/core/src/main/java/io/serverlessworkflow/impl/WorkflowUtils.java
@@ -30,6 +30,7 @@
 import io.serverlessworkflow.impl.json.JsonUtils;
 import io.serverlessworkflow.impl.jsonschema.SchemaValidator;
 import io.serverlessworkflow.impl.jsonschema.SchemaValidatorFactory;
+import io.serverlessworkflow.impl.resources.ClasspathResource;
 import io.serverlessworkflow.impl.resources.ResourceLoader;
 import io.serverlessworkflow.impl.resources.StaticResource;
 import java.io.IOException;
@@ -67,6 +68,19 @@ private static Optional<JsonNode> schemaToNode(
     return Optional.empty();
   }
 
+  public static Optional<JsonNode> classpathResourceToNode(String resource) {
+    if (resource != null && !resource.isEmpty()) {
+      ClasspathResource classpathResource = new ClasspathResource(resource);
+      ObjectMapper mapper = WorkflowFormat.fromFileName(resource).mapper();
+      try (InputStream in = classpathResource.open()) {
+        return Optional.of(mapper.readTree(in));
+      } catch (IOException io) {
+        throw new UncheckedIOException(io);
+      }
+    }
+    return Optional.empty();
+  }
+
   public static Optional<WorkflowFilter> buildWorkflowFilter(
       ExpressionFactory exprFactory, InputFrom from) {
     return from != null
diff --git a/impl/openapi/pom.xml b/impl/openapi/pom.xml
new file mode 100644
index 00000000..7b199eaa
--- /dev/null
+++ b/impl/openapi/pom.xml
@@ -0,0 +1,43 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>io.serverlessworkflow</groupId>
+    <artifactId>serverlessworkflow-impl</artifactId>
+    <version>7.0.0-SNAPSHOT</version>
+  </parent>
+  <artifactId>serverlessworkflow-impl-openapi</artifactId>
+  <dependencies>
+    <dependency>
+      <groupId>org.glassfish.jersey.core</groupId>
+      <artifactId>jersey-client</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.glassfish.jersey.media</groupId>
+      <artifactId>jersey-media-json-jackson</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>io.serverlessworkflow</groupId>
+      <artifactId>serverlessworkflow-impl-core</artifactId>
+    </dependency>
+      <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-params</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+</project>
\ No newline at end of file
diff --git a/impl/openapi/src/main/java/io/serverlessworkflow/impl/executors/OpenAPIExecutor.java b/impl/openapi/src/main/java/io/serverlessworkflow/impl/executors/OpenAPIExecutor.java
new file mode 100644
index 00000000..580f6a1f
--- /dev/null
+++ b/impl/openapi/src/main/java/io/serverlessworkflow/impl/executors/OpenAPIExecutor.java
@@ -0,0 +1,142 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification Authors
+ *
+ * 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 io.serverlessworkflow.impl.executors;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.JsonNode;
+import io.serverlessworkflow.api.types.CallOpenAPI;
+import io.serverlessworkflow.api.types.Endpoint;
+import io.serverlessworkflow.api.types.EndpointUri;
+import io.serverlessworkflow.api.types.OpenAPIArguments;
+import io.serverlessworkflow.api.types.TaskBase;
+import io.serverlessworkflow.api.types.UriTemplate;
+import io.serverlessworkflow.impl.TaskContext;
+import io.serverlessworkflow.impl.WorkflowContext;
+import io.serverlessworkflow.impl.WorkflowDefinition;
+import io.serverlessworkflow.impl.WorkflowError;
+import io.serverlessworkflow.impl.WorkflowException;
+import io.serverlessworkflow.impl.WorkflowUtils;
+import io.serverlessworkflow.impl.expressions.Expression;
+import io.serverlessworkflow.impl.expressions.ExpressionFactory;
+import io.serverlessworkflow.impl.json.JsonUtils;
+import jakarta.ws.rs.client.Client;
+import jakarta.ws.rs.client.ClientBuilder;
+import jakarta.ws.rs.client.WebTarget;
+import java.util.Map;
+import java.util.Optional;
+
+public class OpenAPIExecutor implements CallableTask<CallOpenAPI> {
+  private static final Client client = ClientBuilder.newClient();
+  private TargetSupplier targetSupplier;
+
+  @FunctionalInterface
+  private interface TargetSupplier {
+    WebTarget apply(WorkflowContext workflow, TaskContext<?> task, JsonNode node);
+  }
+
+  @Override
+  public void init(CallOpenAPI task, WorkflowDefinition definition) {
+    OpenAPIArguments args = task.getWith();
+    this.targetSupplier = getTargetSupplier(args, definition.expressionFactory());
+  }
+
+  @Override
+  public JsonNode apply(
+      WorkflowContext workflowContext, TaskContext<CallOpenAPI> taskContext, JsonNode input) {
+
+    WebTarget target = this.targetSupplier.apply(workflowContext, taskContext, input);
+
+    System.out.println("target: " + target.getUri());
+
+    return input;
+  }
+
+  @Override
+  public boolean accept(Class<? extends TaskBase> clazz) {
+    return clazz.isAssignableFrom(CallOpenAPI.class);
+  }
+
+  private static TargetSupplier getURISupplier(UriTemplate template, String operationId) {
+    if (template.getLiteralUri() != null) {
+
+      Optional<JsonNode> jsonNode =
+          WorkflowUtils.classpathResourceToNode(template.getLiteralUri().toString());
+
+      if (jsonNode.isEmpty()) {
+        throw new IllegalArgumentException(
+            "Invalid OpenAPI specification " + template.getLiteralUri().toString());
+      }
+
+      String host = OpenAPIReader.getHost(jsonNode.get());
+
+      Optional<JsonNode> possibleOperation =
+          OpenAPIReader.readOperation(jsonNode.get(), operationId);
+
+      if (possibleOperation.isEmpty()) {
+        throw new WorkflowException(
+            WorkflowError.error(WorkflowError.RUNTIME_TYPE, 400)
+                .title("Invalid OpenAPI Specification")
+                .details("There is no operation ID " + operationId)
+                .build());
+      }
+
+      return (w, t, n) -> client.target(host);
+    } else if (template.getLiteralUriTemplate() != null) {
+      return (w, t, n) ->
+          client
+              .target(template.getLiteralUriTemplate())
+              .resolveTemplates(
+                  JsonUtils.mapper().convertValue(n, new TypeReference<Map<String, Object>>() {}));
+    }
+    throw new IllegalArgumentException("Invalid uritemplate definition " + template);
+  }
+
+  private static class ExpressionURISupplier implements TargetSupplier {
+    private Expression expr;
+
+    public ExpressionURISupplier(Expression expr) {
+      this.expr = expr;
+    }
+
+    @Override
+    public WebTarget apply(WorkflowContext workflow, TaskContext<?> task, JsonNode node) {
+      return client.target(expr.eval(workflow, task, node).asText());
+    }
+  }
+
+  private static TargetSupplier getTargetSupplier(
+      OpenAPIArguments args, ExpressionFactory expressionFactory) {
+
+    Endpoint endpoint = args.getDocument().getEndpoint();
+    String operationId = args.getOperationId();
+
+    if (endpoint.getEndpointConfiguration() != null) {
+      EndpointUri uri = endpoint.getEndpointConfiguration().getUri();
+      if (uri.getLiteralEndpointURI() != null) {
+        return getURISupplier(uri.getLiteralEndpointURI(), operationId);
+      } else if (uri.getExpressionEndpointURI() != null) {
+        return new ExpressionURISupplier(
+            expressionFactory.getExpression(uri.getExpressionEndpointURI()));
+      }
+    } else if (endpoint.getRuntimeExpression() != null) {
+      return new ExpressionURISupplier(
+          expressionFactory.getExpression(endpoint.getRuntimeExpression()));
+    } else if (endpoint.getUriTemplate() != null) {
+      return getURISupplier(endpoint.getUriTemplate(), operationId);
+    }
+    throw new IllegalArgumentException("Invalid endpoint definition " + endpoint);
+  }
+}
diff --git a/impl/openapi/src/main/java/io/serverlessworkflow/impl/executors/OpenAPIReader.java b/impl/openapi/src/main/java/io/serverlessworkflow/impl/executors/OpenAPIReader.java
new file mode 100644
index 00000000..be8bc0aa
--- /dev/null
+++ b/impl/openapi/src/main/java/io/serverlessworkflow/impl/executors/OpenAPIReader.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification Authors
+ *
+ * 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 io.serverlessworkflow.impl.executors;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+
+public class OpenAPIReader {
+
+  private static final String HTTPS = "https";
+  private static final String HTTP = "http";
+  private static final String DEFAULT_SCHEME = HTTPS;
+  private static final Set<String> ALLOWED_SCHEMES = Set.of(HTTPS, HTTP);
+
+  public static String getHost(JsonNode jsonNode) {
+    JsonNode host = jsonNode.get("host");
+    if (host == null) {
+      return null;
+    }
+    String scheme = getScheme(jsonNode);
+    return scheme + "://" + host.asText();
+  }
+
+  private static String getScheme(JsonNode jsonNode) {
+    ArrayNode array = jsonNode.withArrayProperty("schemes");
+    if (array != null && !array.isEmpty()) {
+      String firstScheme = array.get(0).asText();
+      return ALLOWED_SCHEMES.contains(firstScheme) ? firstScheme : DEFAULT_SCHEME;
+    }
+    return DEFAULT_SCHEME;
+  }
+
+  public static Optional<JsonNode> readOperation(JsonNode jsonNode, String operationId) {
+    JsonNode paths = jsonNode.get("paths");
+    for (Map.Entry<String, JsonNode> entry : paths.properties()) {
+      for (Map.Entry<String, JsonNode> httpMethod : entry.getValue().properties()) {
+        if (httpMethod.getValue().get("operationId").asText().equals(operationId)) {
+          return Optional.ofNullable(httpMethod.getValue());
+        }
+      }
+    }
+    return Optional.empty();
+  }
+}
diff --git a/impl/openapi/src/main/resources/META-INF/services/io.serverlessworkflow.impl.executors.CallableTask b/impl/openapi/src/main/resources/META-INF/services/io.serverlessworkflow.impl.executors.CallableTask
new file mode 100644
index 00000000..10d85299
--- /dev/null
+++ b/impl/openapi/src/main/resources/META-INF/services/io.serverlessworkflow.impl.executors.CallableTask
@@ -0,0 +1 @@
+io.serverlessworkflow.impl.executors.OpenAPIExecutor
\ No newline at end of file
diff --git a/impl/openapi/src/test/java/io/serverlessworkflow/impl/OpenAPIWorkflowDefinitionTest.java b/impl/openapi/src/test/java/io/serverlessworkflow/impl/OpenAPIWorkflowDefinitionTest.java
new file mode 100644
index 00000000..f82a4e3a
--- /dev/null
+++ b/impl/openapi/src/test/java/io/serverlessworkflow/impl/OpenAPIWorkflowDefinitionTest.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification Authors
+ *
+ * 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 io.serverlessworkflow.impl;
+
+import static io.serverlessworkflow.api.WorkflowReader.readWorkflowFromClasspath;
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import java.io.IOException;
+import java.util.Map;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+public class OpenAPIWorkflowDefinitionTest {
+
+  private static WorkflowApplication app;
+
+  @BeforeAll
+  static void init() {
+    app = WorkflowApplication.builder().build();
+  }
+
+  @Test
+  void testWorkflowExecution() throws IOException {
+    Object output =
+        app.workflowDefinition(readWorkflowFromClasspath("findPetsByStatus.yaml"))
+            .execute(Map.of("status", "sold"))
+            .outputAsJsonNode();
+    assertThat(output)
+        .isInstanceOf(JsonNode.class)
+        .satisfies(
+            (obj) -> {
+              JsonNode json = (JsonNode) obj;
+              assertThat(json.get("status").asText()).isEqualTo("sold");
+            });
+  }
+}
diff --git a/impl/openapi/src/test/resources/findPetsByStatus.yaml b/impl/openapi/src/test/resources/findPetsByStatus.yaml
new file mode 100644
index 00000000..9ddfa2ff
--- /dev/null
+++ b/impl/openapi/src/test/resources/findPetsByStatus.yaml
@@ -0,0 +1,14 @@
+document:
+  dsl: '1.0.0-alpha5'
+  namespace: test
+  name: openapi-example
+  version: '0.1.0'
+do:
+  - findPet:
+      call: openapi
+      with:
+        document:
+          endpoint: pets.json
+        operationId: findPetsByStatus
+        parameters:
+          status: available
\ No newline at end of file
diff --git a/impl/openapi/src/test/resources/pets.json b/impl/openapi/src/test/resources/pets.json
new file mode 100644
index 00000000..817ecb02
--- /dev/null
+++ b/impl/openapi/src/test/resources/pets.json
@@ -0,0 +1,1054 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "description": "This is a sample server Petstore server.  You can find out more about Swagger at [http://swagger.io](http://swagger.io) or on [irc.freenode.net, #swagger](http://swagger.io/irc/).  For this sample, you can use the api key `special-key` to test the authorization filters.",
+    "version": "1.0.7",
+    "title": "Swagger Petstore",
+    "termsOfService": "http://swagger.io/terms/",
+    "contact": {
+      "email": "apiteam@swagger.io"
+    },
+    "license": {
+      "name": "Apache 2.0",
+      "url": "http://www.apache.org/licenses/LICENSE-2.0.html"
+    }
+  },
+  "host": "petstore.swagger.io",
+  "basePath": "/v2",
+  "tags": [
+    {
+      "name": "pet",
+      "description": "Everything about your Pets",
+      "externalDocs": {
+        "description": "Find out more",
+        "url": "http://swagger.io"
+      }
+    },
+    {
+      "name": "store",
+      "description": "Access to Petstore orders"
+    },
+    {
+      "name": "user",
+      "description": "Operations about user",
+      "externalDocs": {
+        "description": "Find out more about our store",
+        "url": "http://swagger.io"
+      }
+    }
+  ],
+  "schemes": [
+    "https",
+    "http"
+  ],
+  "paths": {
+    "/pet/{petId}/uploadImage": {
+      "post": {
+        "tags": [
+          "pet"
+        ],
+        "summary": "uploads an image",
+        "description": "",
+        "operationId": "uploadFile",
+        "consumes": [
+          "multipart/form-data"
+        ],
+        "produces": [
+          "application/json"
+        ],
+        "parameters": [
+          {
+            "name": "petId",
+            "in": "path",
+            "description": "ID of pet to update",
+            "required": true,
+            "type": "integer",
+            "format": "int64"
+          },
+          {
+            "name": "additionalMetadata",
+            "in": "formData",
+            "description": "Additional data to pass to server",
+            "required": false,
+            "type": "string"
+          },
+          {
+            "name": "file",
+            "in": "formData",
+            "description": "file to upload",
+            "required": false,
+            "type": "file"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "$ref": "#/definitions/ApiResponse"
+            }
+          }
+        },
+        "security": [
+          {
+            "petstore_auth": [
+              "write:pets",
+              "read:pets"
+            ]
+          }
+        ]
+      }
+    },
+    "/pet": {
+      "post": {
+        "tags": [
+          "pet"
+        ],
+        "summary": "Add a new pet to the store",
+        "description": "",
+        "operationId": "addPet",
+        "consumes": [
+          "application/json",
+          "application/xml"
+        ],
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "in": "body",
+            "name": "body",
+            "description": "Pet object that needs to be added to the store",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/Pet"
+            }
+          }
+        ],
+        "responses": {
+          "405": {
+            "description": "Invalid input"
+          }
+        },
+        "security": [
+          {
+            "petstore_auth": [
+              "write:pets",
+              "read:pets"
+            ]
+          }
+        ]
+      },
+      "put": {
+        "tags": [
+          "pet"
+        ],
+        "summary": "Update an existing pet",
+        "description": "",
+        "operationId": "updatePet",
+        "consumes": [
+          "application/json",
+          "application/xml"
+        ],
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "in": "body",
+            "name": "body",
+            "description": "Pet object that needs to be added to the store",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/Pet"
+            }
+          }
+        ],
+        "responses": {
+          "400": {
+            "description": "Invalid ID supplied"
+          },
+          "404": {
+            "description": "Pet not found"
+          },
+          "405": {
+            "description": "Validation exception"
+          }
+        },
+        "security": [
+          {
+            "petstore_auth": [
+              "write:pets",
+              "read:pets"
+            ]
+          }
+        ]
+      }
+    },
+    "/pet/findByStatus": {
+      "get": {
+        "tags": [
+          "pet"
+        ],
+        "summary": "Finds Pets by status",
+        "description": "Multiple status values can be provided with comma separated strings",
+        "operationId": "findPetsByStatus",
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "name": "status",
+            "in": "query",
+            "description": "Status values that need to be considered for filter",
+            "required": true,
+            "type": "array",
+            "items": {
+              "type": "string",
+              "enum": [
+                "available",
+                "pending",
+                "sold"
+              ],
+              "default": "available"
+            },
+            "collectionFormat": "multi"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/Pet"
+              }
+            }
+          },
+          "400": {
+            "description": "Invalid status value"
+          }
+        },
+        "security": [
+          {
+            "petstore_auth": [
+              "write:pets",
+              "read:pets"
+            ]
+          }
+        ]
+      }
+    },
+    "/pet/findByTags": {
+      "get": {
+        "tags": [
+          "pet"
+        ],
+        "summary": "Finds Pets by tags",
+        "description": "Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.",
+        "operationId": "findPetsByTags",
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "name": "tags",
+            "in": "query",
+            "description": "Tags to filter by",
+            "required": true,
+            "type": "array",
+            "items": {
+              "type": "string"
+            },
+            "collectionFormat": "multi"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/Pet"
+              }
+            }
+          },
+          "400": {
+            "description": "Invalid tag value"
+          }
+        },
+        "security": [
+          {
+            "petstore_auth": [
+              "write:pets",
+              "read:pets"
+            ]
+          }
+        ],
+        "deprecated": true
+      }
+    },
+    "/pet/{petId}": {
+      "get": {
+        "tags": [
+          "pet"
+        ],
+        "summary": "Find pet by ID",
+        "description": "Returns a single pet",
+        "operationId": "getPetById",
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "name": "petId",
+            "in": "path",
+            "description": "ID of pet to return",
+            "required": true,
+            "type": "integer",
+            "format": "int64"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "$ref": "#/definitions/Pet"
+            }
+          },
+          "400": {
+            "description": "Invalid ID supplied"
+          },
+          "404": {
+            "description": "Pet not found"
+          }
+        },
+        "security": [
+          {
+            "api_key": []
+          }
+        ]
+      },
+      "post": {
+        "tags": [
+          "pet"
+        ],
+        "summary": "Updates a pet in the store with form data",
+        "description": "",
+        "operationId": "updatePetWithForm",
+        "consumes": [
+          "application/x-www-form-urlencoded"
+        ],
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "name": "petId",
+            "in": "path",
+            "description": "ID of pet that needs to be updated",
+            "required": true,
+            "type": "integer",
+            "format": "int64"
+          },
+          {
+            "name": "name",
+            "in": "formData",
+            "description": "Updated name of the pet",
+            "required": false,
+            "type": "string"
+          },
+          {
+            "name": "status",
+            "in": "formData",
+            "description": "Updated status of the pet",
+            "required": false,
+            "type": "string"
+          }
+        ],
+        "responses": {
+          "405": {
+            "description": "Invalid input"
+          }
+        },
+        "security": [
+          {
+            "petstore_auth": [
+              "write:pets",
+              "read:pets"
+            ]
+          }
+        ]
+      },
+      "delete": {
+        "tags": [
+          "pet"
+        ],
+        "summary": "Deletes a pet",
+        "description": "",
+        "operationId": "deletePet",
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "name": "api_key",
+            "in": "header",
+            "required": false,
+            "type": "string"
+          },
+          {
+            "name": "petId",
+            "in": "path",
+            "description": "Pet id to delete",
+            "required": true,
+            "type": "integer",
+            "format": "int64"
+          }
+        ],
+        "responses": {
+          "400": {
+            "description": "Invalid ID supplied"
+          },
+          "404": {
+            "description": "Pet not found"
+          }
+        },
+        "security": [
+          {
+            "petstore_auth": [
+              "write:pets",
+              "read:pets"
+            ]
+          }
+        ]
+      }
+    },
+    "/store/inventory": {
+      "get": {
+        "tags": [
+          "store"
+        ],
+        "summary": "Returns pet inventories by status",
+        "description": "Returns a map of status codes to quantities",
+        "operationId": "getInventory",
+        "produces": [
+          "application/json"
+        ],
+        "parameters": [],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "type": "object",
+              "additionalProperties": {
+                "type": "integer",
+                "format": "int32"
+              }
+            }
+          }
+        },
+        "security": [
+          {
+            "api_key": []
+          }
+        ]
+      }
+    },
+    "/store/order": {
+      "post": {
+        "tags": [
+          "store"
+        ],
+        "summary": "Place an order for a pet",
+        "description": "",
+        "operationId": "placeOrder",
+        "consumes": [
+          "application/json"
+        ],
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "in": "body",
+            "name": "body",
+            "description": "order placed for purchasing the pet",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/Order"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "$ref": "#/definitions/Order"
+            }
+          },
+          "400": {
+            "description": "Invalid Order"
+          }
+        }
+      }
+    },
+    "/store/order/{orderId}": {
+      "get": {
+        "tags": [
+          "store"
+        ],
+        "summary": "Find purchase order by ID",
+        "description": "For valid response try integer IDs with value >= 1 and <= 10. Other values will generated exceptions",
+        "operationId": "getOrderById",
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "name": "orderId",
+            "in": "path",
+            "description": "ID of pet that needs to be fetched",
+            "required": true,
+            "type": "integer",
+            "maximum": 10,
+            "minimum": 1,
+            "format": "int64"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "$ref": "#/definitions/Order"
+            }
+          },
+          "400": {
+            "description": "Invalid ID supplied"
+          },
+          "404": {
+            "description": "Order not found"
+          }
+        }
+      },
+      "delete": {
+        "tags": [
+          "store"
+        ],
+        "summary": "Delete purchase order by ID",
+        "description": "For valid response try integer IDs with positive integer value. Negative or non-integer values will generate API errors",
+        "operationId": "deleteOrder",
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "name": "orderId",
+            "in": "path",
+            "description": "ID of the order that needs to be deleted",
+            "required": true,
+            "type": "integer",
+            "minimum": 1,
+            "format": "int64"
+          }
+        ],
+        "responses": {
+          "400": {
+            "description": "Invalid ID supplied"
+          },
+          "404": {
+            "description": "Order not found"
+          }
+        }
+      }
+    },
+    "/user/createWithList": {
+      "post": {
+        "tags": [
+          "user"
+        ],
+        "summary": "Creates list of users with given input array",
+        "description": "",
+        "operationId": "createUsersWithListInput",
+        "consumes": [
+          "application/json"
+        ],
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "in": "body",
+            "name": "body",
+            "description": "List of user object",
+            "required": true,
+            "schema": {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/User"
+              }
+            }
+          }
+        ],
+        "responses": {
+          "default": {
+            "description": "successful operation"
+          }
+        }
+      }
+    },
+    "/user/{username}": {
+      "get": {
+        "tags": [
+          "user"
+        ],
+        "summary": "Get user by user name",
+        "description": "",
+        "operationId": "getUserByName",
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "name": "username",
+            "in": "path",
+            "description": "The name that needs to be fetched. Use user1 for testing. ",
+            "required": true,
+            "type": "string"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "schema": {
+              "$ref": "#/definitions/User"
+            }
+          },
+          "400": {
+            "description": "Invalid username supplied"
+          },
+          "404": {
+            "description": "User not found"
+          }
+        }
+      },
+      "put": {
+        "tags": [
+          "user"
+        ],
+        "summary": "Updated user",
+        "description": "This can only be done by the logged in user.",
+        "operationId": "updateUser",
+        "consumes": [
+          "application/json"
+        ],
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "name": "username",
+            "in": "path",
+            "description": "name that need to be updated",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "in": "body",
+            "name": "body",
+            "description": "Updated user object",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/User"
+            }
+          }
+        ],
+        "responses": {
+          "400": {
+            "description": "Invalid user supplied"
+          },
+          "404": {
+            "description": "User not found"
+          }
+        }
+      },
+      "delete": {
+        "tags": [
+          "user"
+        ],
+        "summary": "Delete user",
+        "description": "This can only be done by the logged in user.",
+        "operationId": "deleteUser",
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "name": "username",
+            "in": "path",
+            "description": "The name that needs to be deleted",
+            "required": true,
+            "type": "string"
+          }
+        ],
+        "responses": {
+          "400": {
+            "description": "Invalid username supplied"
+          },
+          "404": {
+            "description": "User not found"
+          }
+        }
+      }
+    },
+    "/user/login": {
+      "get": {
+        "tags": [
+          "user"
+        ],
+        "summary": "Logs user into the system",
+        "description": "",
+        "operationId": "loginUser",
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "name": "username",
+            "in": "query",
+            "description": "The user name for login",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "name": "password",
+            "in": "query",
+            "description": "The password for login in clear text",
+            "required": true,
+            "type": "string"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "headers": {
+              "X-Expires-After": {
+                "type": "string",
+                "format": "date-time",
+                "description": "date in UTC when token expires"
+              },
+              "X-Rate-Limit": {
+                "type": "integer",
+                "format": "int32",
+                "description": "calls per hour allowed by the user"
+              }
+            },
+            "schema": {
+              "type": "string"
+            }
+          },
+          "400": {
+            "description": "Invalid username/password supplied"
+          }
+        }
+      }
+    },
+    "/user/logout": {
+      "get": {
+        "tags": [
+          "user"
+        ],
+        "summary": "Logs out current logged in user session",
+        "description": "",
+        "operationId": "logoutUser",
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [],
+        "responses": {
+          "default": {
+            "description": "successful operation"
+          }
+        }
+      }
+    },
+    "/user/createWithArray": {
+      "post": {
+        "tags": [
+          "user"
+        ],
+        "summary": "Creates list of users with given input array",
+        "description": "",
+        "operationId": "createUsersWithArrayInput",
+        "consumes": [
+          "application/json"
+        ],
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "in": "body",
+            "name": "body",
+            "description": "List of user object",
+            "required": true,
+            "schema": {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/User"
+              }
+            }
+          }
+        ],
+        "responses": {
+          "default": {
+            "description": "successful operation"
+          }
+        }
+      }
+    },
+    "/user": {
+      "post": {
+        "tags": [
+          "user"
+        ],
+        "summary": "Create user",
+        "description": "This can only be done by the logged in user.",
+        "operationId": "createUser",
+        "consumes": [
+          "application/json"
+        ],
+        "produces": [
+          "application/json",
+          "application/xml"
+        ],
+        "parameters": [
+          {
+            "in": "body",
+            "name": "body",
+            "description": "Created user object",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/User"
+            }
+          }
+        ],
+        "responses": {
+          "default": {
+            "description": "successful operation"
+          }
+        }
+      }
+    }
+  },
+  "securityDefinitions": {
+    "api_key": {
+      "type": "apiKey",
+      "name": "api_key",
+      "in": "header"
+    },
+    "petstore_auth": {
+      "type": "oauth2",
+      "authorizationUrl": "https://petstore.swagger.io/oauth/authorize",
+      "flow": "implicit",
+      "scopes": {
+        "read:pets": "read your pets",
+        "write:pets": "modify pets in your account"
+      }
+    }
+  },
+  "definitions": {
+    "ApiResponse": {
+      "type": "object",
+      "properties": {
+        "code": {
+          "type": "integer",
+          "format": "int32"
+        },
+        "type": {
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        }
+      }
+    },
+    "Category": {
+      "type": "object",
+      "properties": {
+        "id": {
+          "type": "integer",
+          "format": "int64"
+        },
+        "name": {
+          "type": "string"
+        }
+      },
+      "xml": {
+        "name": "Category"
+      }
+    },
+    "Pet": {
+      "type": "object",
+      "required": [
+        "name",
+        "photoUrls"
+      ],
+      "properties": {
+        "id": {
+          "type": "integer",
+          "format": "int64"
+        },
+        "category": {
+          "$ref": "#/definitions/Category"
+        },
+        "name": {
+          "type": "string",
+          "example": "doggie"
+        },
+        "photoUrls": {
+          "type": "array",
+          "xml": {
+            "wrapped": true
+          },
+          "items": {
+            "type": "string",
+            "xml": {
+              "name": "photoUrl"
+            }
+          }
+        },
+        "tags": {
+          "type": "array",
+          "xml": {
+            "wrapped": true
+          },
+          "items": {
+            "xml": {
+              "name": "tag"
+            },
+            "$ref": "#/definitions/Tag"
+          }
+        },
+        "status": {
+          "type": "string",
+          "description": "pet status in the store",
+          "enum": [
+            "available",
+            "pending",
+            "sold"
+          ]
+        }
+      },
+      "xml": {
+        "name": "Pet"
+      }
+    },
+    "Tag": {
+      "type": "object",
+      "properties": {
+        "id": {
+          "type": "integer",
+          "format": "int64"
+        },
+        "name": {
+          "type": "string"
+        }
+      },
+      "xml": {
+        "name": "Tag"
+      }
+    },
+    "Order": {
+      "type": "object",
+      "properties": {
+        "id": {
+          "type": "integer",
+          "format": "int64"
+        },
+        "petId": {
+          "type": "integer",
+          "format": "int64"
+        },
+        "quantity": {
+          "type": "integer",
+          "format": "int32"
+        },
+        "shipDate": {
+          "type": "string",
+          "format": "date-time"
+        },
+        "status": {
+          "type": "string",
+          "description": "Order Status",
+          "enum": [
+            "placed",
+            "approved",
+            "delivered"
+          ]
+        },
+        "complete": {
+          "type": "boolean"
+        }
+      },
+      "xml": {
+        "name": "Order"
+      }
+    },
+    "User": {
+      "type": "object",
+      "properties": {
+        "id": {
+          "type": "integer",
+          "format": "int64"
+        },
+        "username": {
+          "type": "string"
+        },
+        "firstName": {
+          "type": "string"
+        },
+        "lastName": {
+          "type": "string"
+        },
+        "email": {
+          "type": "string"
+        },
+        "password": {
+          "type": "string"
+        },
+        "phone": {
+          "type": "string"
+        },
+        "userStatus": {
+          "type": "integer",
+          "format": "int32",
+          "description": "User Status"
+        }
+      },
+      "xml": {
+        "name": "User"
+      }
+    }
+  },
+  "externalDocs": {
+    "description": "Find out more about Swagger",
+    "url": "http://swagger.io"
+  }
+}
\ No newline at end of file
diff --git a/impl/pom.xml b/impl/pom.xml
index b49f8ab0..ad1de383 100644
--- a/impl/pom.xml
+++ b/impl/pom.xml
@@ -35,8 +35,9 @@
     </dependencies>  
   </dependencyManagement>
   <modules>
-    <module>http</module>
-    <module>core</module>
-    <module>bom</module>
+  	<module>http</module>
+  	<module>core</module>
+  	<module>bom</module>
+    <module>openapi</module>
   </modules>
 </project>
\ No newline at end of file