HL7ProtocolHandler.java

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
 *
 * The Initial Developer of the Original Code is
 * Agfa Healthcare.
 * Portions created by the Initial Developer are Copyright (C) 2012
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * See @authors listed below
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

package org.dcm4che3.net.hl7;

import java.io.IOException;
import java.net.Socket;
import java.text.ParsePosition;

import org.dcm4che3.hl7.HL7Exception;
import org.dcm4che3.hl7.HL7Message;
import org.dcm4che3.hl7.HL7Segment;
import org.dcm4che3.hl7.MLLPConnection;
import org.dcm4che3.net.Connection;
import org.dcm4che3.net.TCPProtocolHandler;

/**
 * @author Gunter Zeilinger <gunterze@gmail.com>
 *
 */
enum HL7ProtocolHandler implements TCPProtocolHandler {
    INSTANCE;

    @Override
    public void onAccept(Connection conn, Socket s) throws IOException {
        s.setSoTimeout(conn.getIdleTimeout());
        MLLPConnection mllp = new MLLPConnection(s);
        byte[] msg;
        while ((msg = mllp.readMessage()) != null) {
            ParsePosition pos = new ParsePosition(0);
            HL7Segment msh = HL7Segment.parseMSH(msg, msg.length, pos);
            try {
                msg = conn.getDevice().getDeviceExtension(HL7DeviceExtension.class)
                        .onMessage(msh, msg, 0, msg.length, pos.getIndex(), conn, s);
            } catch (HL7Exception e) {
                msg = HL7Message.makeACK(msh, e.getAcknowledgmentCode(), e.getErrorMessage())
                        .getBytes(null);
            }
            mllp.writeMessage(msg);
        }
        conn.close(s);
    }
}