Java tutorial
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(By way * of non-limiting example, you will not contribute any code obtained by you under the GNU General Public License or other * so-called "reciprocal" license.) *******************************************************************************/ package edu.stanford.epad.epadws.xnat; import java.io.IOException; import javax.servlet.http.HttpServletResponse; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.methods.DeleteMethod; import edu.stanford.epad.common.util.EPADLogger; import edu.stanford.epad.epadws.processing.events.EventTracker; /** * Methods for deleting XNAT entities, such as projects, subjects, and experiments. * * * @author martin */ public class XNATDeletionOperations { private static final EPADLogger log = EPADLogger.getInstance(); private static final EventTracker eventTracker = EventTracker.getInstance(); public static int deleteXNATProject(String xnatProjectLabelOrID, String jsessionID) { String xnatProjectDeleteURL = XNATUtil.buildXNATProjectDeletionURL(xnatProjectLabelOrID); HttpClient client = new HttpClient(); DeleteMethod method = new DeleteMethod(xnatProjectDeleteURL); int xnatStatusCode; method.setRequestHeader("Cookie", "JSESSIONID=" + jsessionID); try { log.info("Invoking XNAT with URL " + xnatProjectDeleteURL); xnatStatusCode = client.executeMethod(method); if (unexpectedDeletionStatusCode(xnatStatusCode)) log.warning("Failure calling XNAT to delete project; status code = " + xnatStatusCode); else { eventTracker.recordProjectEvent(jsessionID, xnatProjectLabelOrID); } } catch (IOException e) { log.warning("Error calling XNAT to delete for project " + xnatProjectLabelOrID, e); xnatStatusCode = HttpServletResponse.SC_INTERNAL_SERVER_ERROR; } finally { method.releaseConnection(); } return xnatStatusCode; } public static int deleteXNATSubject(String xnatProjectLabelOrID, String xnatSubjectLabelOrID, String jsessionID) { String xnatSubjectDeleteURL = XNATUtil.buildXNATSubjectDeletionURL(xnatProjectLabelOrID, xnatSubjectLabelOrID); HttpClient client = new HttpClient(); DeleteMethod method = new DeleteMethod(xnatSubjectDeleteURL); int xnatStatusCode; method.setRequestHeader("Cookie", "JSESSIONID=" + jsessionID); try { log.info("Invoking XNAT with URL " + xnatSubjectDeleteURL); xnatStatusCode = client.executeMethod(method); if (unexpectedDeletionStatusCode(xnatStatusCode)) log.warning("Failure calling XNAT to delete subject; status code = " + xnatStatusCode); else { eventTracker.recordPatientEvent(jsessionID, xnatProjectLabelOrID, xnatSubjectLabelOrID); } } catch (IOException e) { log.warning("Error calling XNAT to delete patient " + xnatSubjectLabelOrID + " from project " + xnatProjectLabelOrID, e); xnatStatusCode = HttpServletResponse.SC_INTERNAL_SERVER_ERROR; } finally { method.releaseConnection(); } return xnatStatusCode; } public static int deleteXNATDICOMStudy(String xnatProjectLabelOrID, String xnatSubjectLabelOrID, String studyUID, String sessionID) { String xnatStudyDeleteURL = XNATUtil.buildXNATDICOMStudyDeletionURL(xnatProjectLabelOrID, xnatSubjectLabelOrID, studyUID); HttpClient client = new HttpClient(); DeleteMethod method = new DeleteMethod(xnatStudyDeleteURL); int xnatStatusCode; method.setRequestHeader("Cookie", "JSESSIONID=" + sessionID); try { log.info("Invoking XNAT with URL " + xnatStudyDeleteURL); xnatStatusCode = client.executeMethod(method); if (unexpectedDeletionStatusCode(xnatStatusCode)) log.warning("Failure calling XNAT to delete Study; status code = " + xnatStatusCode); else { eventTracker.recordStudyEvent(sessionID, xnatProjectLabelOrID, xnatSubjectLabelOrID, studyUID); } } catch (IOException e) { log.warning("Error calling XNAT to delete study + " + studyUID + " for patient " + xnatSubjectLabelOrID + " from project " + xnatProjectLabelOrID, e); xnatStatusCode = HttpServletResponse.SC_INTERNAL_SERVER_ERROR; } finally { method.releaseConnection(); } return xnatStatusCode; } private static boolean unexpectedDeletionStatusCode(int statusCode) { return !(statusCode == HttpServletResponse.SC_OK || statusCode == HttpServletResponse.SC_ACCEPTED); } public static boolean successStatusCode(int statusCode) { return (statusCode == HttpServletResponse.SC_OK || statusCode == HttpServletResponse.SC_ACCEPTED); } }