edu.stanford.epad.epadws.xnat.XNATDeletionOperations.java Source code

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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);
    }
}