| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.nifi.web; |
| |
| import javax.servlet.http.HttpServletRequest; |
| |
| /** |
| * An implementation of the ConfigurationRequestContext that retrieves configuration |
| * from a HttpServletRequest instance. |
| */ |
| public class HttpServletConfigurationRequestContext extends HttpServletRequestContext implements NiFiWebConfigurationRequestContext { |
| |
| private static final String CLIENT_ID_PARAM = "clientId"; |
| private static final String REVISION_PARAM = "revision"; |
| |
| private final HttpServletRequest request; |
| |
| public HttpServletConfigurationRequestContext(final UiExtensionType extensionType, final HttpServletRequest request) { |
| super(extensionType, request); |
| this.request = request; |
| } |
| |
| /** |
| * @return the revision retrieved from the request parameters with keys |
| * equal to "clientId" and "revision". |
| */ |
| @Override |
| public Revision getRevision() { |
| final String revisionParamVal = request.getParameter(REVISION_PARAM); |
| Long revision; |
| try { |
| revision = Long.parseLong(revisionParamVal); |
| } catch (final Exception ex) { |
| revision = null; |
| } |
| |
| final String clientId = request.getParameter(CLIENT_ID_PARAM); |
| |
| return new Revision(revision, clientId); |
| } |
| |
| } |
