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/*
************************************************************************
******************* CANADIAN ASTRONOMY DATA CENTRE *******************
************** CENTRE CANADIEN DE DONNÉES ASTRONOMIQUES **************
*
* (c) 2019. (c) 2019.
* 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 réservés
*
* NRC disclaims any warranties, Le CNRC dénie toute garantie
* expressed, implied, or énoncée, implicite ou légale,
* 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 être tenu responsable de tout
* indirect, special or general, dommage, direct ou indirect,
* consequential or incidental, particulier ou général,
* arising from the use of the accessoire ou fortuit, résultant
* 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 être utilisés pour approuver ou
* products derived from this promouvoir les produits dérivés
* software without specific prior de ce logiciel sans autorisation
* written permission. préalable et particulière
* par écrit.
*
* 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 publiée
* 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 (à votre gré)
* any later version. toute version ultérieure.
*
* OpenCADC is distributed in the OpenCADC est distribué
* hope that it will be useful, dans l’espoir qu’il vous
* but WITHOUT ANY WARRANTY; sera utile, mais SANS AUCUNE
* without even the implied GARANTIE : sans même la garantie
* warranty of MERCHANTABILITY implicite de COMMERCIALISABILITÉ
* or FITNESS FOR A PARTICULAR ni d’ADÉQUATION À UN OBJECTIF
* PURPOSE. See the GNU Affero PARTICULIER. Consultez la Licence
* General Public License for Générale Publique GNU Affero
* more details. pour plus de détails.
*
* You should have received Vous devriez avoir reçu une
* a copy of the GNU Affero copie de la Licence Générale
* General Public License along Publique GNU Affero avec
* with OpenCADC. If not, see OpenCADC ; si ce n’est
* . pas le cas, consultez :
* .
*
* $Revision: 5 $
*
************************************************************************
*/
package ca.nrc.cadc.caom2.repo.action;
import ca.nrc.cadc.caom2.ObservationResponse;
import ca.nrc.cadc.caom2.ObservationState;
import ca.nrc.cadc.caom2.ObservationURI;
import ca.nrc.cadc.caom2.persistence.ObservationDAO;
import ca.nrc.cadc.caom2.xml.ObservationWriter;
import ca.nrc.cadc.date.DateUtil;
import ca.nrc.cadc.io.ByteCountOutputStream;
import ca.nrc.cadc.net.ResourceNotFoundException;
import com.csvreader.CsvWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.text.DateFormat;
import java.util.Date;
import java.util.List;
import org.apache.log4j.Logger;
/**
*
* @author pdowler
*/
public class GetAction extends RepoAction {
private static final Logger log = Logger.getLogger(GetAction.class);
public static final String CAOM_MIMETYPE = "text/x-caom+xml";
public GetAction() {
}
@Override
public void doAction() throws Exception {
log.debug("GET ACTION");
ObservationURI uri = getURI();
if (uri != null) {
doGetObservation(uri);
return;
} else if (getCollection() != null) {
InputParams ip = getInputParams();
doList(ip.maxrec, ip.start, ip.end, ip.ascending);
} else {
// Responds to requests where no collection is provided.
// Returns list of all collections.
doGetCollectionList();
}
}
protected void doGetObservation(ObservationURI uri) throws Exception {
log.debug("START: " + uri);
checkReadPermission();
ObservationDAO dao = getDAO();
ObservationResponse resp = dao.getObservationResponse(uri);
if (resp.error != null) {
throw new RuntimeException("failed to retrieve observation: " + uri, resp.error);
}
if (resp.observation == null) {
throw new ResourceNotFoundException("not found: " + uri);
}
ObservationWriter ow = getObservationWriter();
syncOutput.setHeader("Content-Type", CAOM_MIMETYPE);
syncOutput.setHeader("ETag", resp.observation.getAccMetaChecksum());
OutputStream os = syncOutput.getOutputStream();
ByteCountOutputStream bc = new ByteCountOutputStream(os);
ow.write(resp.observation, bc);
logInfo.setBytes(bc.getByteCount());
log.debug("DONE: " + uri);
}
protected void doList(int maxRec, Date start, Date end, boolean isAscending) throws Exception {
log.debug("START: " + getCollection());
checkReadPermission();
ObservationDAO dao = getDAO();
List states = dao.getObservationList(getCollection(), start, end, maxRec,
isAscending);
if (states == null) {
throw new ResourceNotFoundException("Collection not found: " + getCollection());
}
long byteCount = writeObservationList(states);
logInfo.setBytes(byteCount);
log.debug("DONE: " + getCollection());
}
protected ObservationWriter getObservationWriter() {
return new ObservationWriter();
}
protected long writeObservationList(List states) throws IOException {
DateFormat df = DateUtil.getDateFormat(DateUtil.IVOA_DATE_FORMAT, DateUtil.UTC);
syncOutput.setHeader("Content-Type", "text/tab-separated-values");
OutputStream os = syncOutput.getOutputStream();
ByteCountOutputStream bc = new ByteCountOutputStream(os);
OutputStreamWriter out = new OutputStreamWriter(bc, "US-ASCII");
CsvWriter writer = new CsvWriter(out, '\t');
for (ObservationState state : states) {
writer.write(state.getURI().getCollection());
writer.write(state.getURI().getObservationID());
if (state.maxLastModified != null) {
writer.write(df.format(state.maxLastModified));
} else {
writer.write("");
}
if (state.accMetaChecksum != null) {
writer.write(state.accMetaChecksum.toASCIIString());
} else {
writer.write("");
}
writer.endRecord();
}
writer.flush();
return bc.getByteCount();
}
}
