package dataqueue;

import java.beans.PropertyChangeEvent;

import java.beans.PropertyChangeListener;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.util.Date;

import com.ibm.as400.access.AS400;

import com.ibm.as400.access.DataQueue;

import com.ibm.as400.access.Record;

import com.ibm.as400.access.RecordFormat;

import common.MDLIFMFormat;

import common.Me;

public class DtaQExample3c implements PropertyChangeListener {

static final DtaQExample3c INSTANCE = new DtaQExample3c();

/**

* Start thread to listen to model output data queue. Read input

* from console and send to model input data queue.

* @param parameters

*/

public static void main(String[] parameters) {

AS400 as400 = null;

System.out.println(" ");

// if a system name was not specified, display help text and exit.

try {

// Create an AS400 object for the server that has the data queue.

as400 = new AS400(Me.getSYSTEM(), Me.getUSER(), Me.getPASSWORD());

// Model input data queue

DataQueue mdliDq = new DataQueue(as400, Me.getMDLI_DTAQ());

// create instance of threat which reads data queue

DtaQExample3Thread dtaqThread = new DtaQExample3Thread(as400, Me.getKEY());

// register the instance of this class as the listener for

// property change events

dtaqThread.addPropertyChangeListener(INSTANCE);

// execute the run() method of the thread

dtaqThread.start();

// create RecordFormat objects from pre-compiled classes

RecordFormat mdliFormat = new MDLIFMFormat();

// create a reader for the console

BufferedReader stdin = new BufferedReader(new InputStreamReader(

System.in), 1);

// loop forever until break statement of JVM ends

while (true) {

// get input from the keyboard

System.out

.println("main()- Instruction *STOPNOW ends this application");

System.out

.println("main()- Please enter the instruction to send to the model: ");

String mdliInstruction = stdin.readLine();

// break loop if *STOPNOW

if (mdliInstruction.equalsIgnoreCase("*STOPNOW")) {

System.out

.println("main()- .... ok! stopping now .... goodbye\n\n");

break;

}

System.out

.println("main()- Please enter the data to send to the model: ");

String mdliMessage = stdin.readLine();

// load the model input record and send it to the model

Record mdliData = mdliFormat.getNewRecord();

mdliData.setField("VCID", Me.getKEY());

mdliData.setField("IINSTRTN", mdliInstruction);

mdliData.setField("IMESSAGE", mdliMessage);

Date start = new Date();

System.out

.print("main()- Writing to MDLI data queue ... ");

mdliDq.write(mdliData.getContents());

long mills = new Date().getTime() - start.getTime();

System.out.println("finished. Time in milliseconds: " + mills);

} // end of while(true)

// pull the rug out from under the thread which is reading

// the model output data queue. Give it time to detect the

// error (disconnected) and shut down

as400.disconnectAllServices();

try {

System.out.println("....terminating program.");

Thread.sleep(500);

} catch(InterruptedException e) {}

} catch (Exception e) {

// If any of the above operations failed say the data queue

// operation

// failed and output the exception.

if (as400 != null)

as400.disconnectAllServices();

System.out.println("Data Queue operation failed");

System.out.println(e);

e.printStackTrace();

}

System.exit(0);

}

/**

* This method gets called

* when a bound property is changed.

* Listen for change in bound property set by the data queue thread. Show

* property name on console. If property name is dqRead show data read

* from data queue on console.

*

* @param event A PropertyChangeEvent object describing the event

* source and the property that has changed.

*/

public void propertyChange(PropertyChangeEvent event) {

// Print to console that a property change event was fired and

// the name of the property.

System.out.println(" ************* propertyChange() name is: " +

event.getPropertyName() + " ********");

// The thread listening to the data queue could fire different

// events based on what was read from the data queue.

if ( event.getPropertyName().equals("dqRead") ) {

// dump the data read from the data queue to the console.

try {

// Record object with the data read from the data queue

// is passed as the new value in the event

Record mdloData = (Record) event.getNewValue();

// Get two values out of the record and display them.

String mdloInstruction = (String) mdloData.getField("OINSTRTN");

String mdloMessage = (String) mdloData.getField("OMESSAGE");

System.out.println(" * The model received instruction: "

+ mdloInstruction.trim()

+ "\n * and returned data: "

+ mdloMessage.trim());

System.out

.println(" ********************************************************");

} catch (Exception e) {

e.printStackTrace();

}

}

}

}