| /* |
| * 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.oodt.cas.wmservices.servlets; |
| |
| import org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet; |
| import org.apache.oodt.cas.metadata.util.PathUtils; |
| import org.apache.oodt.cas.workflow.system.WorkflowManagerClient; |
| import org.apache.oodt.cas.workflow.system.rpc.RpcCommunicationFactory; |
| |
| import javax.servlet.ServletConfig; |
| import javax.servlet.ServletContext; |
| import javax.servlet.ServletException; |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * Initialize workflow manager services servlet |
| * |
| * Set the following Parameters in context.xml for the webapp: |
| * <ul> |
| * <li>workflow.url |
| * <li>packagedRepo.dir.path |
| * </ul> |
| * |
| * @author vratnakar |
| */ |
| public class WmServicesServlet extends CXFNonSpringJaxrsServlet { |
| |
| private static final Logger LOGGER = Logger.getLogger(WmServicesServlet.class.getName()); |
| |
| private static final long serialVersionUID = -7830210280506307805L; |
| |
| // Default URL for the workflow manager |
| private static final String DEFAULT_WM_URL = "http://localhost:9001"; |
| |
| // Servlet context parameter names. |
| private static final String PARAM_NAME_URL = "workflow.url"; |
| private static final String PARAM_NAME_PKGREPO_DIR = "packagedRepo.dir.path"; // For Packaged Repo |
| |
| /** |
| * The name of the servlet context attribute that holds a client for the |
| * workflow manager, a {@link org.apache.oodt.cas.workflow.system.WorkflowManagerClient} object. |
| */ |
| public static final String ATTR_NAME_CLIENT = "client"; |
| |
| /** |
| * The name of the servlet context attribute that holds the workflow manager's |
| * packaged repository directory: a {@link File} object. |
| */ |
| public static final String ATTR_NAME_PKG_REPO_DIR = "pkgRepoFilesDir"; |
| |
| private WorkflowManagerClient client; |
| |
| @Override |
| public void init(ServletConfig configuration) throws ServletException { |
| super.init(configuration); |
| ServletContext context = configuration.getServletContext(); |
| |
| // Initialize the workflow manager client. |
| try { |
| URL url = null; |
| String urlParameter = context.getInitParameter(PARAM_NAME_URL); |
| if (urlParameter != null) { |
| // Get the workflow manager URL from the context parameter. |
| url = new URL(PathUtils.replaceEnvVariables(urlParameter)); |
| } else { |
| // Try the default URL for the workflow manager. |
| LOGGER.log(Level.WARNING, |
| "Unable to find the servlet context parameter" + " (\"" |
| + PARAM_NAME_URL + "\") for the workflow manager's URL."); |
| url = new URL(DEFAULT_WM_URL); |
| } |
| // Attempt to connect the client to the workflow manager and if successful |
| // store the client as a context attribute for other objects to access. |
| client = RpcCommunicationFactory.createClient(url); |
| context.setAttribute(ATTR_NAME_CLIENT, client); |
| } catch (MalformedURLException e) { |
| LOGGER.log(Level.SEVERE, "Encountered a malformed URL for the workflow manager.", e); |
| throw new ServletException(e); |
| } |
| |
| // Initialize the repository directory |
| String pkgRepoDirPath = context.getInitParameter(PARAM_NAME_PKGREPO_DIR); |
| if (pkgRepoDirPath != null) { |
| pkgRepoDirPath = PathUtils.replaceEnvVariables(pkgRepoDirPath); |
| File workflowDir = new File(pkgRepoDirPath); |
| if (workflowDir.exists() && workflowDir.isDirectory()) { |
| context.setAttribute(ATTR_NAME_PKG_REPO_DIR, workflowDir); |
| } else { |
| LOGGER.log(Level.SEVERE, |
| "Unable to locate the Packaged repository directory (" |
| + workflowDir.getAbsolutePath()); |
| } |
| } |
| } |
| |
| @Override |
| public void destroy() { |
| if (client != null) { |
| try { |
| client.close(); |
| client = null; |
| } catch (IOException e) { |
| LOGGER.severe(String.format("Unable to close WM Client: %s", e.getMessage())); |
| } |
| } |
| |
| super.destroy(); |
| } |
| } |