1 files changed, 79 insertions, 0 deletions
diff --git a/activiti-extension/src/main/java/org/onap/workflow/activitiext/restservicetask/LowLevelRestApi.java b/activiti-extension/src/main/java/org/onap/workflow/activitiext/restservicetask/LowLevelRestApi.java
new file mode 100644
index 0000000..9171c31
--- /dev/null
+++ b/activiti-extension/src/main/java/org/onap/workflow/activitiext/restservicetask/LowLevelRestApi.java
@@ -0,0 +1,79 @@
+/**
+ * Copyright 2017 ZTE Corporation.
+ *
+ * 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 org.onap.workflow.activitiext.restservicetask;
+
+import org.apache.commons.httpclient.HttpClient;
+import org.apache.commons.httpclient.HttpMethod;
+
+/**
+ * This static-class eases HTTP-method execution by self-managed fault-handling and automated
+ * Response-information processing
+ */
+public class LowLevelRestApi {
+
+  // Local HttpClient used for every communication (Singleton implementation)
+  private static HttpClient httpClient = new HttpClient();
+
+
+  /**
+   * Executes a passed HttpMethod (Method type is either PUT, POST, GET or DELETE) and returns a
+   * HttpResponseMessage
+   * 
+   * @param method Method to execute
+   * @return HttpResponseMessage which contains all information about the execution
+   */
+  public static HttpResponseMessage executeHttpMethod(HttpMethod method) {
+
+    HttpResponseMessage responseMessage = null;
+
+    try {
+
+      // Execute Request
+      LowLevelRestApi.httpClient.executeMethod(method);
+      responseMessage = LowLevelRestApi.extractResponseInformation(method);
+
+    } catch (Exception e) {
+      e.printStackTrace();
+    } finally {
+
+      // Release Connection anyway
+      method.releaseConnection();
+    }
+
+    // Extract response information and return
+    return responseMessage;
+  }
+
+  /**
+   * Extracts the response information from an executed HttpMethod
+   * 
+   * @param method Executed Method
+   * @return Packaged response information
+   */
+  private static HttpResponseMessage extractResponseInformation(HttpMethod method) {
+    // Create and return HttpResponseMethod
+    HttpResponseMessage responseMessage = new HttpResponseMessage();
+    responseMessage.setStatusCode(method.getStatusCode());
+    try {
+      responseMessage.setResponseBody(method.getResponseBodyAsString());
+    } catch (Exception e) {
+      e.printStackTrace();
+    }
+    return responseMessage;
+
+  }
+
+}