24 Bytes

Must have Eclipse Plugins

2012-11-01T07:00:00.002-07:00

m2eclipse: maven plugin for eclipse
PIT Mutation Test: this plugin helps run mutation tests in eclipse
Sonar plugin for eclipse: run sonar analysis locally or remotely.
Jupiter Plugin:Code Review
TDD Plugins

infinitest: runs junit infinetlyhttp://infinitest.github.com/user_guide.html : run related junits for every change
Static Code Analsis: PMD and FindBugs for eclipse
JUNIT Coverage : EclEmma/clover
JUNIT junit helper, quick unit

Creating jdbc data source on weblogic using java code

2012-07-29T23:46:00.001-07:00

1:

   2:  import java.net.UnknownHostException;

3:

   4:  import org.python.util.InteractiveInterpreter;

5:

   6:  import weblogic.management.scripting.utils.WLSTInterpreter;

7:

   8:  public class DataSourceCreator {

9:

  10:      static InteractiveInterpreter interpreter = null;

  11:      private String weblogicPassword;

  12:      private String weblogicUserName;

  13:      private StringBuffer wlst_script;

14:

  15:      public DataSourceCreator(String weblogicUserName, String weblogicPassword) {

  16:          interpreter = new WLSTInterpreter();

  17:          this.weblogicUserName = weblogicUserName;

  18:          this.weblogicPassword = weblogicPassword;

19:

  20:      }

21:

  22:      /**

  23:       * connect to weblogic

  24:       */

  25:      private void connect() {

  26:          wlst_script.append("connect('" + this.weblogicUserName + "','" + this.weblogicPassword

  27:                  + "')");

  28:      }

29:

  30:      /**

  31:       * creates the data source script

  32:       *

  33:       * @param dbpassword

  34:       * @param dbuser

  35:       * @param dsname

  36:       * @param jndiname

  37:       * @param dburi

  38:       * @param dbdrivername

  39:       */

  40:      private void createDataSourceScript(String dbpassword, String dbuser, String dsname,

  41:              String jndiname, String dburi, String dbdrivername) {

42:

  43:          int timeout = 100000;

  44:          int maxcapacity = 100;

45:

  46:          // substitute your server name here "SERVER_NAME" i.e the target.

  47:          wlst_script.append("cd('Servers/SERVER_NAME')\n");

  48:          wlst_script.append("target=cmo\n");

  49:          wlst_script.append("cd('../..')\n");

  50:          wlst_script.append("jdbcSystemResource = create('" + dsname + "','JDBCSystemResource')\n");

  51:          wlst_script.append("theJDBCResource = jdbcSystemResource.getJDBCResource()\n");

  52:          wlst_script.append("theJDBCResource.setName('" + dsname + "')\n");

  53:          wlst_script

  54:                  .append("connectionPoolParams = theJDBCResource.getJDBCConnectionPoolParams()\n");

  55:          wlst_script.append("connectionPoolParams.setConnectionReserveTimeoutSeconds(int('"

  56:                  + timeout + "'))\n");

57:

  58:          // maximum connections that can be made

  59:          wlst_script.append("connectionPoolParams.setMaxCapacity(int('" + maxcapacity + "'))\n");

  60:          // query to execute using ds to test if its successfull

  61:          wlst_script.append("connectionPoolParams.setTestTableName('SQL SELECT 1 FROM DUAL')\n");

62:

  63:          // update data source params

  64:          wlst_script.append("dsParams = theJDBCResource.getJDBCDataSourceParams()\n");

  65:          wlst_script.append("dsParams.addJNDIName('" + jndiname + "')\n");

66:

  67:          wlst_script.append("driverParams = theJDBCResource.getJDBCDriverParams()\n");

  68:          wlst_script.append("driverParams.setUrl('" + dburi + "')\n");

  69:          wlst_script.append("driverParams.setDriverName('" + dbdrivername + "')\n");

  70:          wlst_script.append("driverParams.setPassword('" + dbpassword + "')\n");

71:

  72:          wlst_script.append("driverProperties = driverParams.getProperties()\n");

  73:          wlst_script.append("proper = driverProperties.createProperty('user')\n");

  74:          wlst_script.append("proper.setValue('" + dbuser + "')\n");

  75:          wlst_script.append("proper1 = driverProperties.createProperty('DatabaseName')\n");

  76:          wlst_script.append("proper1.setValue('" + dburi + "')\n");

  77:          wlst_script.append("jdbcSystemResource.addTarget(target)\n");

  78:      }

79:

  80:      /**

  81:       * @param wlst_script

  82:       */

  83:      private void saveActivateAndDisconnect() {

  84:          // save , activate changes and disconnect

  85:          wlst_script.append("save()\n");

  86:          wlst_script.append("activate(block='true')\n");

  87:          wlst_script.append("disconnect()\n");

  88:      }

89:

  90:      /**

  91:       * start edit

  92:       *

  93:       * @param wlst_script

  94:       */

  95:      private void startEdit() {

  96:          wlst_script.append("edit()\n");

  97:          wlst_script.append("startEdit()\n");

  98:      }

99:

 100:      public static void main(String args[]) throws UnknownHostException {

 101:

 102:          // weblogic related

 103:          String weblogicUserName = "username";

 104:          String weblogicPassword = "password";

 105:

 106:          DataSourceCreator dsCreator = new DataSourceCreator(weblogicUserName, weblogicPassword);

 107:

 108:          dsCreator.connect();

 109:          dsCreator.startEdit();

 110:          String sid = "sidofdb"; // sid of db

 111:          String ipaddress = "10.8.11.16"; // ip addres

 112:          String dbpassword = "password"; // database password

 113:          String dbuser = "username"; // db user name

 114:          String dsname = "datasourcename"; // your data source name

 115:          String jndiname = "jdbc/" + dsname; // jndi name for ds

 116:          String dburi = "jdbc:oracle:thin:@" + ipaddress + ":1521:" + sid;

 117:          String dbdrivername = "oracle.jdbc.driver.OracleDriver";

 118:

 119:          dsCreator.createDataSourceScript(dbpassword, dbuser, dsname, jndiname, dburi, dbdrivername);

 120:          dsCreator.saveActivateAndDisconnect();

 121:

 122:          try {

 123:              // execute the script created above

 124:              interpreter.exec(dsCreator.wlst_script.toString());

 125:          } finally {

 126:              // disconnect even if there is exception

 127:              interpreter.exec("disconnect()\n");

 128:          }

 129:

 130:      }

 131:

 132:  }

\Java\jre6\lib\ext\QTJava.zip was unexpected at this time.

2012-07-28T02:08:00.001-07:00

just check if "Java\jre6\lib\ext\QTJava.zip" is there in the class path you just have to remove and restart weblogic.

Roman Number to decimal

2012-05-14T07:49:00.002-07:00

Map mapping = new HashMap();

   Conversion() {
       mapping.put("I", 1);
       mapping.put("V", 5);
       mapping.put("X", 10);
       mapping.put("L", 50);
       mapping.put("C", 100);
       mapping.put("D", 500);
       mapping.put("M", 1000);

   }

   /**
   * @param romanNumber
   * @return
   */
   public int romanToDecimal(String romanNumber) {
       int result = 0;

       if (romanNumber.length() == 0) {
           return result;
       }

       if (romanNumber.length() == 1) {
           return (Integer) mapping.get(romanNumber);
       }

       else {
           int leftEnd = (Integer) mapping.get(romanNumber.charAt(0) + "");

           if (leftEnd >= (Integer) mapping.get(romanNumber.charAt(1) + "")) {

               result += leftEnd;
           } else {
               result += - leftEnd;
           }
           result += romanToDecimal(romanNumber.substring(1));
       }
       return result;
   }

Invoke a webservice from linux shell

2012-04-23T21:32:00.001-07:00

ENDPOINT="http://localhost:8001/soa-infra/services/default/App/StartApp"

curl --silent --data @- --header 'Content-Type: application/soap+xml; charset=utf-8' --user-agent "" ${ENDPOINT} <<EOF  
<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns:xsd="http://www.w3.org/2001/XMLSchema"    xmlns:soap12="http://www.w3.org/2003/05/soap-envelope"  xmlns:ns1="http://xmlns.oracle.com/Application/StartApp">
<soap12:Body>
<ns1:process>                        
<ns1:input>running</ns1:input>        
</ns1:process>    
</soap12:Body> 
</soap12:Envelope>
EOF

ENDPOINT : this can be configured to point to ws endpoint

The envelope in weblogic can be got by clicking test on the web service and switching to xml view.

Curl is a command line tool to transfer data to a URL

Double.MIN_Value is greater than zero

2011-12-07T10:50:00.001-08:00

i got confused today thinking double.Min_Value is 0 but its slightly greater :)

A constant holding the smallest positive nonzero value of type (oracle java)
0x0.0000000000001P-1022; // 4.9e-324

Template Method

2011-10-09T06:28:00.001-07:00

"Defines the skeleton of the algorithm , and defers some implementation to the sub classes."
the above example makeDrink() calls

addWater
addFruit
addIce

the addFruit implementation is left to the sub classes orange and apple juice makers

the method makeDrink is made final so that the steps of making the juice is not changed

State

2011-10-09T06:26:00.001-07:00

Memento

2011-10-09T06:25:00.001-07:00

Mediator

2011-10-09T06:23:00.001-07:00

Iterator

2011-10-09T06:20:00.001-07:00

single responsibility,
simplifies aggregator
does not expose implementation of aggregator

Strategy Pattern

2011-10-09T06:19:00.001-07:00

Defines a set of algorithms
Makes them interchangeable
clients have the option to select

in the example below the client can tell the type of indexer to use in the dictionary
the behavior of indexer which changes is moved to another class there by separating
the class which changes and the one which does not change
the dictionary delegates calls to search and sort to the indexer

Chain Of Responsibility

2011-10-09T06:12:00.001-07:00

Proxy

2011-10-09T06:10:00.001-07:00

Composite

2011-10-09T06:06:00.001-07:00

Facade

2011-10-09T06:04:00.001-07:00

Adaptor

2011-10-09T06:00:00.001-07:00

Builder Pattern

2011-10-09T05:57:00.001-07:00

Abstract Factory

2011-10-09T05:54:00.001-07:00

Maven Notes

2011-09-21T20:51:00.001-07:00

Makes Build easy and uniform
helps maintain project quality
some useful commands

skip tests

-Dmaven.test.skip=true or -DskipTests=true

run a single unit test

nmvn test -Dtest=TestName

Debug output

Mvn -X parameter or -e parameter

MOJO ?

Maven plain Old Java Object

dependencies on public Maven repositories?

https://repository.apache.org/

Multiple Threads to resolve Artifacts?

mvn -Dmave.artifact.threads=10 clean install (default is 5)

Create a Maven Project

nmvn archetype:generate -DgroupId=com.bytes.my -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

Phases in Maven

validate: validate the project is correct and all necessary information is available

compile: compile the source code of the project

test: test the compiled source code using a suitable unit testing framework. These tests should not require the code be packaged or deployed

package: take the compiled code and package it in its distributable format, such as a JAR.

integration-test: process and deploy the package if necessary into an environment where integration tests can be run

verify: run any checks to verify the package is valid and meets quality criteria

install: install the package into the local repository, for use as a dependency in other projects locally

deploy: done in an integration or release environment, copies the final package to the remote repository for sharing with other developers and projects.

clean: cleans up artifacts created by prior builds

site: generates site documentation for this project

Oracle SOA – JMS

2011-09-21T20:47:00.001-07:00

two types of messaging models

Queues : the message is used only once
Topics : its perfect for notification, the same message is used by many clients.

Annotations @ Runtime

2011-06-28T08:37:00.001-07:00

for an annotation to be accessible at runtime it has to be annotated as follows
@Retention(RUNTIME)

How to access annotations

Method[] methods = cls.getMethods();

for(int i=0;i<methods.length';i++){

Annotation[] annos = methods[i].getAnnotations();

// the annos[] can be type casted to the annotation and then used.
}

ORA-01691: DEV_SOAINFRA.SYS_LOB

2011-06-01T02:49:00.001-07:00

Internal Exception: java.sql.BatchUpdateException: ORA-01691: unable to extend lob segment DEV_SOAINFRA.SYS_LOB0000073615C00017$$ by 1024 in tablespace DEV_SOAINFRA

Error Code: 1691
    at oracle.integration.platform.instance.store.DOStore.put(DOStore.java:177)
    at oracle.integration.platform.instance.error.DOObjectExceptionHandler.recover(DOObjectExceptionHandler.java:41)
    at oracle.integration.platform.instance.error.FileBackedExceptionHandler.recover(FileBackedExceptionHandler.java:301)
    at oracle.integration.platform.instance.error.FileBackedExceptionHandler.run(FileBackedExceptionHandler.java:355)
    at oracle.integration.platform.blocks.executor.WorkManagerExecutor$1.run(WorkManagerExecutor.java:106)
    at weblogic.work.j2ee.J2EEWorkManager$WorkWithListener.run(J2EEWorkManager.java:183)
    at weblogic.work.DaemonWorkThread.run(DaemonWorkThread.java:30)
Caused by: Exception [TOPLINK-4002] (Oracle TopLink - 11g Release 1 (11.1.1.3.0) (Build 100323)): oracle.toplink.exceptions.DatabaseException

Solution

Increase the table space of DEV_SOAINFRA

log in to oracle em web gui https://<hostname/ip>:1158/em
click on server tab
under storage –> select Tablespaces
click on edit, then there is another edit click on it too
and then you will get file size increase it appropriately.

linux script to replace

2011-05-30T04:47:00.000-07:00

replaces a list of properties in a directory /root/source

for y in `ls /source`;
do sed -f replace.sed /root/source/$y > ./tmp/$y;
done

replace.sed
---------------
s/__CLUSTERNAME__/grapesClus/g
s/__Place2__/Value2/g

Understanding the delivery of email to Google Apps

2011-05-25T23:33:00.000-07:00

Any email sent to email addresses hosted on Google Apps can be filtered with Postini (feature from GoogleApps Business Edition). Postini is the first line of defense from spam and viruses. An e-mail may be quarantined by this system if it contains a virus, is clearly identified as spam or violates system policy rules. If an e-mail is flagged by the Postini system it will be added to the Quarantine area and user will be alerted in a daily Quarantine Summary. The Quarantine Summary has a Deliver option for each message, so if a message has been placed in Quarantine inadvertently a user can request its delivery using this function. If an expected e-mail is missing or a user just wants to check to be proactive, Quarantine can be checked in real time by logging into Postini. From this location, the Quarantine box can be viewed and messages can be delivered if the user so chooses.

Adding users to the Postini

Generally, Postini automatically create user accounts (along with any associated alias addresses) by synchronizing account information with Google Apps account. The first synchronization occurs when service with Google Apps is registered, as part of the activation process. After that, the service synchronizes accounts approximately every 15 to 30 minutes, so the new users quickly receive all the benefits of Postini (Message Security or Message Discovery)

Directory Sync (DS)

Postini service stores a list of users, to allow each user to have custom quarantine and mail filter settings. With Directory Sync, the email protection service can contact the Active Directory(AD) to collect the user list information. Directory Sync will add, delete or move users so that the registered users in the email protection service match the registered users on AD. Directory Sync connects to AD securely, using standard XML technology. Some setup is required to enable Directory Sync to connect to AD