Profiling_Java_WLST

Profiling using JRockit Flight Recorder (Please switch on Flight Recorder using XX:+FlightRecorder)

CreateDataSource.sh
$JDK_BIN/java weblogic.WLST $SERVICE_JYTHON_DIR/createDataSourceFactory.py $1 $2 $3
DAYSTAMP=`(set \`date\`; echo $3)`_`(set \`date\`; echo $2)`_`(set \`date\`; echo $6)`_`(set \`date\`; echo $4)`
export PID=`ps -wwef | grep java | grep WLST | awk '{print $2 }'`
$JDK_BIN/jrcmd $PID start_flightrecording filename=/tmp/${WLS_RELEASE}_${WLS_BUILD}_CreateDataSourceFactory_${DAYSTAMP}.jfr &
sleep 10

createDataSourceFactory.py
import os

import jarray

URL=os.environ['ADMIN_URL']

dataSourceFactoryName=sys.argv[1]

username=sys.argv[2]

password=sys.argv[3]

dbhost=os.environ['DB_HOSTNAME']
dbport=os.environ['DB_PORT']
dbsid=os.environ['DB_SID']

#=====================================================================#
# connect to the AdminServer #
#=====================================================================#

connect( os.environ['WLS_USER'], os.environ['WLS_PW'], URL)

edit()

startEdit()

cd("/")

import time
startTime=time.time()

cmo.createJDBCDataSourceFactory(dataSourceFactoryName)

cd('/JDBCDataSourceFactories/'+dataSourceFactoryName)

set("UserName", username)

set("Password",password)

set("FactoryName", "MyFactory")

set("DriverClassName", "weblogic.jdbcx.oracle.OracleDataSource")

set("URL", "jdbc:oracle:thin:@"+dbhost+":"+dbport+":"+dbsid)



activate()

import time
endTime=time.time()

print "CreateDataSourceFactory: %.3f" % (endTime-startTime)

exit()

NFS Sharing

NFS Settings

1. Create a Folder in Target Server /JMSFileStore on remotehost
2. Provide the permission like chmod 777 /JMSFileStore
3. Login to Node1 -> execute the following commands
4. Login as root
5. mkdir /JMSFileStore on Node1
6. mount -t nfs remotehost:/private/JMSStore /JMSStore -o rw,rsize=16384,wsize=16384,hard,tcp,nolock,addr=10.xxx.xxx.52
7. Now the folder is shared on Node1

Profile

Using JProfile6


export LD_LIBRARY_PATH=/jprofiler6/bin/linux-x86

Append this line -agentlib:jprofilerti=port=8849 -Xbootclasspath/a:/jprofiler6/bin/agent.jar

Taking Thread Dump

connect('weblogic','weblogic1','t3://localhost.com:8001')
threadDump(writeToFile='true', fileName='/tmp/thread_dump.log', serverName='soa_server1')
exit()

Connect2Computer

Do u want 2 be sharing files&document btw d 2 pc without internet or u want d 2 pc to be on internet? if its sharing ur documents,file&printer without internet btw d 2pc then u must get a cross-cable. But if u want d 2 pc on internet then u hv to configure router so tht it serve as ur gateway, by setting ip given by ur ISP as ur default gateway&create and ip for d 2 pc. for example
COMPUTER 1
IP 192.168.1.2
SUBNET-MASK 255.255.255.0
DEFAULT GATEWAY 192.168.1.1


COMPUTER 2
IP 192.168.1.1
SUBNET-MASK 255.255.255.0
DEFAULT GATEWAY 192.168.1.1

I hope its clear enough

JavaTime

java.util.Date d2=new java.util.Date(System.currentTimeMillis());

simpleDateFormat=new java.text.SimpleDateFormat("dd MMM yyyy HH:mm:ss z");

date = simpleDateFormat.format(d2);

System.out.println("date2>>>>>>>>"+date);


Timestamp t = new Timestamp( simpleDateFormat.parse(d2.toGMTString()).getTime() );


System.out.println("TS = " + t);

http://java.sun.com/j2se/1.4.2/docs/api/java/text/SimpleDateFormat.html
http://www.java2s.com/Code/Java/Database-SQL-JDBC/Timestampparse.htm

Jabber Instance Messaging

Java Code to send Jabber Instance Message

ConnectionConfiguration config = new ConnectionConfiguration("localhost",5222);
XMPPConnection connection = new XMPPConnection(config);

connection.connect();
connection.login("demo", "password");

for(int i=0 ; i < 10; i ++)
{
Message message = new Message();
message.setTo("admin@localhost");
message.setBody("Test message from demo " + i);
message.setType(Message.Type.chat);
connection.sendPacket(message);
}



JABBER Installation

Download location
http://www.ejabberd.im/ejabberd-2.0.1
Or
http://www.process-one.net/en/ejabberd/downloads

Step1:
Download Linux x86 32-bits Installer from the download page



Step2:

ejabberd-2.0.1_2-linux-x86-installer.bin.gz

untar the gunzip using following command

tar –d ejabberd-2.0.1_2-linux-x86-installer.bin.gz

You will get

ejabberd-2.0.1_2-linux-x86-installer.bin

execute the bin file using following command (chmod 777 ejabberd-2.0.1_2-linux-x86-installer.bin)

./ejabberd-2.0.1_2-linux-x86-installer.bin

You will get following screens















Improving the speed


%% For all users except admins used "normal" shaper
{access, c2s_shaper, [{none, admin},
{normal, all}]}.

Change "normal" to "fast":

%% For all users except admins used "fast" shaper
{access, c2s_shaper, [{none, admin},
{fast, all}]}.

J2ME RMS

package rms;


import javax.microedition.midlet.*;
import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordStore;
import javax.microedition.rms.RecordStoreException;
import javax.microedition.lcdui.*;
import javax.swing.JLabel;

import java.awt.Font;
import java.io.*;

public class ReadWriteRecord
extends MIDlet implements CommandListener {

private Display display;
private Alert alert;
private Form form;
private Command exit;
private Command read,readByte;
private Command write,writeByte;
private Command delete;


private RecordStore recordstoreRead,recordstoreWrite,recordstoreDelete = null;
RecordEnumeration recEnum;

public ReadWriteRecord() {
display = Display.getDisplay(this);
exit = new Command("Exit", Command.EXIT, 1);
read = new Command("Read", Command.SCREEN, 1);
readByte = new Command("Read Byte", Command.SCREEN, 1);
write = new Command("Write", Command.SCREEN, 1);
writeByte = new Command("Write Byte", Command.SCREEN, 1);
delete = new Command("Delete",Command.SCREEN,2);
//////////////////////////
//Font font = new Font("TAU_Elango_Ragham",22,22);
///////////////////////////
form = new Form("Mixed Record " + "\"வாழ்க வளமுடன்\"");
form.addCommand(exit);
form.addCommand(read);
form.addCommand(write);
form.addCommand(readByte);
form.addCommand(writeByte);
form.addCommand(delete);
form.setCommandListener(this);
}

public void startApp()
{
display.setCurrent(form);
}

public void pauseApp()
{

}

public void destroyApp( boolean unconditional )
{

}

public void commandAction(Command command, Displayable displayable)
{
if (command == exit)
{
destroyApp(true);
notifyDestroyed();
}
else if (command == read)
{
doRead();
}
else if (command == write)
{
doWrite();
}
else if (command == readByte)
{
doReadByte();
}
else if (command == writeByte)
{
doWriteByte();
}
else if (command == delete)
{
doDelete();
}

}

public void doRead()
{
try
{

recordstoreRead = RecordStore.openRecordStore("myRecordStoreUTF", true );

System.out.println("NumRecords : " + recordstoreRead.getNumRecords());

for (int i = 1; i <= recordstoreRead.getNumRecords(); i++)
{
byte[] byteInputData = new byte[50];
recordstoreRead.getRecord(i, byteInputData, 0);
ByteArrayInputStream inputStream = new ByteArrayInputStream(byteInputData);
DataInputStream inputDataStream = new DataInputStream(inputStream);

StringItem idItem = new StringItem("Id: ", String.valueOf(inputDataStream.readInt()));
StringItem nameItem = new StringItem("Name :", inputDataStream.readUTF());
StringItem ageItem = new StringItem("Age :", inputDataStream.readUTF());
StringItem sexItem = new StringItem("Sex :", inputDataStream.readUTF());

form.append(idItem);
form.append(nameItem);
form.append(ageItem);
form.append(sexItem);
}

Alert a = new Alert("Success", "Read Records finished", null, AlertType.INFO);
Display.getDisplay(this).setCurrent(a);

}
catch(Exception ex)
{
Alert a = new Alert("Fail to read", ex.getMessage(), null, AlertType.ERROR);
Display.getDisplay(this).setCurrent(a);

System.out.println("Unable to read the Record");
ex.printStackTrace();
}
}

public void doWrite()
{
ByteArrayOutputStream bout = new ByteArrayOutputStream();
DataOutputStream dout = new DataOutputStream( bout );

try
{

recordstoreWrite = RecordStore.openRecordStore("myRecordStoreUTF", true );

int input_id = 1;
String input_name = "Senthil";
String input_age = "29";
String input_sex = "Male";

byte dataArray[];

try
{
dout.writeInt( input_id );
dout.writeUTF( input_name );
dout.writeUTF( input_age );
dout.writeUTF( input_sex);
dout.close();

dataArray = bout.toByteArray();
recordstoreWrite.addRecord( dataArray, 0, dataArray.length );
}
catch( RecordStoreException e )
{
// handle RMS error here
}
catch( IOException e )
{
// handle IO error here
}

recordstoreWrite.closeRecordStore();

Alert a = new Alert("Success to Write", "Record written into File", null, AlertType.INFO);
Display.getDisplay(this).setCurrent(a);

}
catch(Exception ex)
{
Alert a = new Alert("Fail to write", ex.getMessage(), null, AlertType.ERROR);
Display.getDisplay(this).setCurrent(a);

System.out.println("Unable to write the Record");
ex.printStackTrace();
}

}
}