Java tutorial
/* ************************************************************************ ******************* CANADIAN ASTRONOMY DATA CENTRE ******************* ************** CENTRE CANADIEN DE DONNES ASTRONOMIQUES ************** * * (c) 2009. (c) 2009. * Government of Canada Gouvernement du Canada * National Research Council Conseil national de recherches * Ottawa, Canada, K1A 0R6 Ottawa, Canada, K1A 0R6 * All rights reserved Tous droits rservs * * NRC disclaims any warranties, Le CNRC dnie toute garantie * expressed, implied, or nonce, implicite ou lgale, * statutory, of any kind with de quelque nature que ce * respect to the software, soit, concernant le logiciel, * including without limitation y compris sans restriction * any warranty of merchantability toute garantie de valeur * or fitness for a particular marchande ou de pertinence * purpose. NRC shall not be pour un usage particulier. * liable in any event for any Le CNRC ne pourra en aucun cas * damages, whether direct or tre tenu responsable de tout * indirect, special or general, dommage, direct ou indirect, * consequential or incidental, particulier ou gnral, * arising from the use of the accessoire ou fortuit, rsultant * software. Neither the name de l'utilisation du logiciel. Ni * of the National Research le nom du Conseil National de * Council of Canada nor the Recherches du Canada ni les noms * names of its contributors may de ses participants ne peuvent * be used to endorse or promote tre utiliss pour approuver ou * products derived from this promouvoir les produits drivs * software without specific prior de ce logiciel sans autorisation * written permission. pralable et particulire * par crit. * * This file is part of the Ce fichier fait partie du projet * OpenCADC project. OpenCADC. * * OpenCADC is free software: OpenCADC est un logiciel libre ; * you can redistribute it and/or vous pouvez le redistribuer ou le * modify it under the terms of modifier suivant les termes de * the GNU Affero General Public la GNU Affero General Public * License as published by the License? telle que publie * Free Software Foundation, par la Free Software Foundation * either version 3 of the : soit la version 3 de cette * License, or (at your option) licence, soit ( votre gr) * any later version. toute version ultrieure. * * OpenCADC is distributed in the OpenCADC est distribu * hope that it will be useful, dans lespoir quil vous * but WITHOUT ANY WARRANTY; sera utile, mais SANS AUCUNE * without even the implied GARANTIE : sans mme la garantie * warranty of MERCHANTABILITY implicite de COMMERCIALISABILIT * or FITNESS FOR A PARTICULAR ni dADQUATION UN OBJECTIF * PURPOSE. See the GNU Affero PARTICULIER. Consultez la Licence * General Public License for Gnrale Publique GNU Affero * more details. pour plus de dtails. * * You should have received Vous devriez avoir reu une * a copy of the GNU Affero copie de la Licence Gnrale * General Public License along Publique GNU Affero avec * with OpenCADC. If not, see OpenCADC ; si ce nest * <http://www.gnu.org/licenses/>. pas le cas, consultez : * <http://www.gnu.org/licenses/>. * * $Revision: 4 $ * ************************************************************************ */ package ca.nrc.cadc.uws.web.restlet.resources; import java.io.IOException; import java.security.AccessControlException; import java.security.PrivilegedAction; import java.security.PrivilegedActionException; import java.security.PrivilegedExceptionAction; import java.text.DateFormat; import java.text.ParseException; import java.util.ArrayList; import java.util.Date; import java.util.Iterator; import java.util.List; import javax.security.auth.Subject; import org.apache.log4j.Logger; import org.jdom2.Document; import org.jdom2.Element; import org.restlet.data.Form; import org.restlet.data.Status; import org.restlet.representation.Representation; import org.restlet.resource.Post; import ca.nrc.cadc.auth.AuthMethod; import ca.nrc.cadc.auth.AuthenticationUtil; import ca.nrc.cadc.date.DateUtil; import ca.nrc.cadc.io.ByteLimitExceededException; import ca.nrc.cadc.net.TransientException; import ca.nrc.cadc.uws.ExecutionPhase; import ca.nrc.cadc.uws.Job; import ca.nrc.cadc.uws.JobListWriter; import ca.nrc.cadc.uws.JobRef; import ca.nrc.cadc.uws.server.JobPersistenceException; import ca.nrc.cadc.uws.web.restlet.RestletJobCreator; /** * Resource to handle Asynchronous calls. */ public class AsynchResource extends UWSResource { private final static Logger LOGGER = Logger.getLogger(AsynchResource.class); private DateFormat dateFormat = DateUtil.getDateFormat(DateUtil.IVOA_DATE_FORMAT, DateUtil.UTC); /** * Accept POST requests. * * @param entity The POST Request body. */ @Post public void accept(final Representation entity) { Subject subject = getSubject(); if (subject == null) // anon { doAccept(entity); } else { Subject.doAs(subject, new PrivilegedAction<Object>() { public Object run() { doAccept(entity); return null; } }); } } @SuppressWarnings("CallToThreadDumpStack") private void doAccept(final Representation entity) { try { final RestletJobCreator jobCreator = new RestletJobCreator(getInlineContentHandler()); final Job job = jobCreator.create(entity); job.setRequestPath(getRequestPath()); job.setRemoteIP(getRemoteIP()); Job persistedJob = getJobManager().create(job); redirectSeeOther(getHostPart() + getRequestPath() + "/" + persistedJob.getID()); } catch (ByteLimitExceededException ex) { String errorMessage = "XML document exceeds " + ex.getLimit() + " bytes"; LOGGER.info("Exception caught in doAccept: " + errorMessage); generateErrorRepresentation(Status.CLIENT_ERROR_REQUEST_ENTITY_TOO_LARGE, errorMessage); } catch (AccessControlException e) { generateErrorRepresentation(Status.CLIENT_ERROR_FORBIDDEN, e.getMessage()); } catch (TransientException t) { generateRetryRepresentation(t); } catch (Exception ex) { LOGGER.error("Exception caught in doAccept: " + ex); generateErrorRepresentation(Status.CLIENT_ERROR_BAD_REQUEST, ex.getMessage()); } } /** * Assemble the XML for this Resource's Representation into the given * Document. * * @param document The Document to build up. * @throws java.io.IOException If something went wrong or the XML cannot be * built. */ @Override protected void buildXML(final Document document) throws IOException { Subject subject = getSubject(); if (subject == null) // anon { doBuildXML(document); } try { Subject.doAs(subject, new PrivilegedExceptionAction<Object>() { public Object run() throws Exception { doBuildXML(document); return null; } }); } catch (PrivilegedActionException e) { throw new IOException(e.getCause()); } } private void doBuildXML(final Document document) throws IOException { Form query = getQuery(); String[] phases = query.getValuesArray("PHASE", true); String after = query.getFirstValue("AFTER", true); String last = query.getFirstValue("LAST", true); try { Subject caller = AuthenticationUtil.getCurrentSubject(); AuthMethod am = AuthenticationUtil.getAuthMethod(caller); if (am == null || AuthMethod.ANON.equals(am)) { generateErrorRepresentation(Status.CLIENT_ERROR_FORBIDDEN, "anonymous job listing not permitted"); } List<ExecutionPhase> phaseList = new ArrayList<ExecutionPhase>(); for (String es : phases) { try { phaseList.add(ExecutionPhase.toValue(es)); } catch (IllegalArgumentException e) { throw new IllegalArgumentException("invalid parameter: PHASE=" + es); } } String path = getRequestPath(); int i = path.indexOf('/', 2); // the second / String appname = path.substring(0, i + 1); // include second / // parse 'last' parameter Integer lastInt = null; if (last != null) { try { lastInt = Integer.parseInt(last); } catch (NumberFormatException e) { throw new IllegalArgumentException("invalid parameter: LAST=" + last); } if (lastInt < 1) throw new IllegalArgumentException("invalid parameter: LAST=" + last); } // parse 'after' parameter Date afterDate = null; if (after != null) { try { afterDate = dateFormat.parse(after); } catch (ParseException e) { throw new IllegalArgumentException("invalid parameter: AFTER=" + after); } } Iterator<JobRef> jobs = getJobManager().iterator(appname, phaseList, afterDate, lastInt); JobListWriter jobListWriter = new JobListWriter(); Element root = jobListWriter.getRootElement(jobs); document.setRootElement(root); } catch (IllegalArgumentException ex) { String msg = ex.getMessage(); LOGGER.debug(msg); generateErrorRepresentation(Status.CLIENT_ERROR_BAD_REQUEST, msg); } catch (UnsupportedOperationException e) { // not implemented--turn into a 'Forbidden' throw new AccessControlException("permission denied: " + e.getMessage()); } catch (TransientException e) { LOGGER.error(e); generateErrorRepresentation(Status.SERVER_ERROR_SERVICE_UNAVAILABLE, "Transient error."); } catch (JobPersistenceException e) { LOGGER.error("persistence fail", e); generateErrorRepresentation(Status.SERVER_ERROR_INTERNAL, "Internal error."); } } }