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/*
*
* Copyright (C) 1999, Institute for MicroTherapy
*
* This software and supporting documentation were developed by
*
* University of Witten/Herdecke
* Department of Radiology and MicroTherapy
* Institute for MicroTherapy
* Medical computer science
*
* Universitaetsstrasse 142
* 44799 Bochum, Germany
*
* http://www.microtherapy.de/go/cs
* mailto:computer.science@microtherapy.de
*
* THIS SOFTWARE IS MADE AVAILABLE, AS IS, AND THE INSTITUTE MAKES NO
* WARRANTY REGARDING THE SOFTWARE, ITS PERFORMANCE, ITS MERCHANTABILITY
* OR FITNESS FOR ANY PARTICULAR USE, FREEDOM FROM ANY COMPUTER DISEASES
* OR ITS CONFORMITY TO ANY SPECIFICATION. THE ENTIRE RISK AS TO QUALITY
* AND PERFORMANCE OF THE SOFTWARE IS WITH THE USER.
*
* Author : $Author: kleber $
* Last update : $Date: 2001/06/06 10:32:30 $
* Revision : $Revision: 1.1.1.1 $
* State: $State: Exp $
*/
package processCommunication;
import J2Ci.*;
import java.io.*;
import java.net.*;
import java.util.*;
/**
* This class handles the communication with the
* DICOMscope processes.
*
* @author Klaus Kleber
* @since 16.10.2000
*/
public class ProcessCommunicationHandler extends java.lang.Thread
{
/**
* Date/Time format: YYYY-MM-Dd:HH-mm-ss:SSSSSS
*/
public static final java.text.SimpleDateFormat dateTimeFormaterString = new java.text.SimpleDateFormat("yyyy-MM-dd, HH:mm:ss.SSSSSS");
/**
* Socket
*/
private Socket socket;
/**
* InputStream
*/
DataInputStream in;
/**
* OutputStream
*/
DataOutputStream out;
/**
* Counter for the applicationID
*/
private static int processIDCounter = 0;
/**
* Constuctor with the specified Socket.
* @param socket Communication socket
*/
public ProcessCommunicationHandler(Socket socket)
{
this.socket = socket;
}
/**
* Contains the avilable processes. For each processID you can get the name of the process
*/
private static Hashtable processList = new Hashtable();
/**
* Open the Input/OutputStream and waits for messages. Each received message will be
* answered. This function stops if the skocket will be closed.
*/
public void run()
{
try
{
in = new DataInputStream(socket.getInputStream());
out = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream()));
}
catch(IOException e)
{
System.err.println(e);
}
try
{
while(true)
{
handleMessage();
}
}
catch(IOException e)
{
//System.err.println(e);
}
}
/**
* Receives the message and answered it.
* For each received message a DicomScopeMessage will
* be fired.
*/
private void handleMessage() throws IOException
{
int processId=-1;
String text = null;
int messageId = in.readInt();
String messageName = ProcessMessageIDs.getMessageName(messageId);
int payload = in.readInt();
int statusId = 0;
switch(messageId)
{
case ProcessMessageIDs.REQUEST_APPLICATION_IDENTIFICATIONNUMBER:
processId = giveNewProcessID();
int processType = in.readInt();
statusId = in.readInt();
text = readText(in);
out.writeInt(ProcessMessageIDs.ASSIGN_APPLICATION_IDENTIFICATION_NUMBER);
out.writeInt(4);
out.writeInt(processId);
insertProcess(processId, processType);
break;
case ProcessMessageIDs.APPLICATION_TERMINATES:
processId = in.readInt();
statusId = in.readInt();
out.writeInt(ProcessMessageIDs.RESPOND_OK);
out.writeInt(0);
// The processId of the process will be removed at the end of this function
break;
case ProcessMessageIDs.RECEIVED_UNENCRYPTED_DICOM_CONNECTION:
processId = in.readInt();
statusId = in.readInt();
text = readText(in);
out.writeInt(ProcessMessageIDs.RESPOND_OK);
out.writeInt(0);
break;
case ProcessMessageIDs.RECEIVED_ENCRYPTED_DICOM_CONNECTION:
processId = in.readInt();
statusId = in.readInt();
text = readText(in);
out.writeInt(ProcessMessageIDs.RESPOND_OK);
out.writeInt(0);
break;
case ProcessMessageIDs.DICOM_CONNECTION_CLOSED:
processId = in.readInt();
statusId = in.readInt();
out.writeInt(ProcessMessageIDs.RESPOND_OK);
out.writeInt(0);
break;
case ProcessMessageIDs.DICOM_CONNECTION_ABORDED:
processId = in.readInt();
statusId = in.readInt();
text = readText(in);
out.writeInt(ProcessMessageIDs.RESPOND_OK);
out.writeInt(0);
break;
case ProcessMessageIDs.REQUESTED_UNENCRYPTED_DICOM_CONNECTION:
processId = in.readInt();
statusId = in.readInt();
text = readText(in);
out.writeInt(ProcessMessageIDs.RESPOND_OK);
out.writeInt(0);
break;
case ProcessMessageIDs.REQUESTED_ENCRYPTED_DICOM_CONNECTION:
processId = in.readInt();
statusId = in.readInt();
text = readText(in);
out.writeInt(ProcessMessageIDs.RESPOND_OK);
out.writeInt(0);
break;
case ProcessMessageIDs.RECEIVED_DICOM_OBJECT:
processId = in.readInt();
statusId = in.readInt();
text = readText(in);
out.writeInt(ProcessMessageIDs.RESPOND_OK);
out.writeInt(0);
break;
case ProcessMessageIDs.SENT_DICOM_OBJECT:
processId = in.readInt();
statusId = in.readInt();
text = readText(in);
out.writeInt(ProcessMessageIDs.RESPOND_OK);
out.writeInt(0);
break;
}
out.flush();
if (text == null) text = "";
String processTypeName = getProcessName(processId);
int processType= getProcessType(processId);
String date = getCurrentDateString();
String statusName = ProcessStatusIDs.getStatusName(statusId);
// Remove the messageID if process Terminates
if (messageId == ProcessMessageIDs.APPLICATION_TERMINATES) removeProcess(processId);
ProcessController.instance().fireProcessLog(new DicomScopeMessage( messageId,
messageName,
processId,
processType,
processTypeName,
date,
statusId,
statusName,
text));
}
/**
* Reads a String from the specified DataInputStream. The length of the String
* will be readed first (int). A String is teminated with one or more Null bytes
* Thes null bytes will be eleminated.
* @return The readed String without null-bytes.
*/
private String readText(DataInputStream in) throws IOException
{
int length = in.readInt();
byte b[] = new byte[length];
in.read(b);
int lastIndex = length;
while((lastIndex > 0)&& (b[lastIndex-1] == 0x00)) lastIndex--;
return new String(b, 0,lastIndex);
}
/**
* Removes the process specified by the Id.
* @param processId Specifies the process to be removed.
*/
private void removeProcess(int processId)
{
processList.remove(new Integer(processId));
}
/**
* Insert a process
* @param processId Unique ID identifying a process.
* @param processType Id for the process type
*/
private static synchronized void insertProcess(int processId,int processType)
{
processList.put(new Integer(processId),new Integer(processType) );
}
/**
* Gets the type of a process with the specified Id.
* @param processId Id of the process
* @return The type of the process.
*/
private static synchronized int getProcessType(int processId)
{
return ((Integer) processList.get(new Integer(processId))).intValue();
}
/**
* Gets the name of a process with the specified Id.
* @param processId Id of the process
* @return The name of the process.
*/
private static synchronized String getProcessName(int processId)
{
return ProcessTypeIDs.getProcessName(getProcessType(processId));
}
/**
* Calculates a new unique process id:
* @return Returns the new process id
*/
public synchronized static int giveNewProcessID()
{
return processIDCounter++;
}
/**
* Returns a String with the current date in ISO format.
* (Date/Time format: YYYY-MM-Dd:HH-mm-ss:SSSSSS )
* @return String with the current date in ISO format.
*/
public String getCurrentDateString()
{
Calendar calendar = new GregorianCalendar ();
return dateTimeFormaterString.format(calendar.getTime());
}
}
/*
* CVS Log
* $Log: ProcessCommunicationHandler.java,v $
* Revision 1.1.1.1 2001/06/06 10:32:30 kleber
* Init commit for DICOMscope 3.5
* Create new CVS
*
*/
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