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/**
* 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;
}
}
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