Month: October 2020

Watch “Hibernate Part-3 | Advantages and Disadvantages of Hibernate framework (Gujarati)” on YouTube

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Advantages
✔️ Open Source and Lightweight
✔️ Fast Performance
✔️ Database Independent Query
✔️ Automatic Table Creation
✔️ Simplifies Complex Join
✔️ Provides Query Statistics and Database Status

Disadvantages
✔️ It can’t be learnt easily.
✔️ The debugging due to xml files and performance tuning becomes difficult at times.
✔️ Hibernate is a bit slower than pure JDBC as it is generating lots of SQL ✔️ statements in runtime.
✔️ It advisable to use pure JDBC for batch processing.

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Watch “Hibernate Part-2 | Need of Hibernate Framework (Gujarati)” on YouTube

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✔️ Developers use JDBC for communicating with the DB and the java app.
✔️ JDBC programming needs to create SQL statement, execute the statement and then process the results, Also the runtime exceptions are needed to be handled.
✔️ To effectively solve above issue, ORM tool was developed.
✔️ The ORM tool generates the SQL statements, executes the SQL statement and finally processes the result.
✔️ It also handles the exceptions occurred in the program.

Features of Hibernate
✔️ Object/Relational Mapping
✔️ JPA Provider
✔️ Idiomatic (Natural) persistence
✔️ High Performance
✔️ Scalability
✔️ Reliable
✔️ Extensibility

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Watch “Hibernate Part-1 | Introduction to Hibernate Framework (Gujarati)” on YouTube

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➡️ Hibernate is the ORM tool to transfer the data between a java (object) app and a database (Relational) in the form of the objects.  
➡️ It is an open source, light weight tool given by Gavin King.
➡️ It is a non-invasive (don’t force) framework, it doesn’t force the developers to extend/implement any class/interface, there are only POJO classes so its light weight.
➡️ It can run with-in or with-out server, it will suitable for all types of java apps (desktop or servers)
➡️ It is purely for persistence (to store/retrieve data from DB).

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Watch “Webinar on Ubuntu Operating System (OS) – Gujarati” on YouTube

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✔️ ઑપરેટિંગ સિસ્ટમ (OS) કમ્પ્યુટર હાર્ડવેર સાધનો વ્યવસ્થા અને કોમ્પ્યુટર પ્રોગ્રામ માટે સામાન્ય સેવાઓ પૂરી પાડે છે કે જે સોફ્ટવેર એક સંગ્રહ છે.
✔️ ઉબુન્ટુ (અંગ્રેજી Ubuntu) એ કોમ્પ્યુટરની એક (free) મફ્ત ઓપરેટિંગ સિસ્ટમ છે.
✔️ ઉબુન્ટુ ડેબિયન (Debian) આધારીત લિનક્ષ (Linux) જેવી ઓપરેટિંગ સિસ્ટમ છે.
✔️ તેનું નામ દક્ષીણી આફ્રિકી ભાષાનો શબ્દ ઊબુન્ટુ (અન્ય તરફની માનવતા) ની પાછળ રાખવામાં આવ્યું છે.
✔️ ઉબુન્ટુ મુખ્યત્વે વ્યક્તિગત કોમ્પ્યુટરો પર વાપરવા માટે રચાયેલ છે, જોકે તેની સર્વર આવૃત્તિ પણ અસ્તિત્વમાં છે.
✔️ ૨૦૧૨ માં થયેલ સર્વે અનુસાર ઉબુન્ટુ એ સૌથી લોકપ્રિય ડેસ્કટોપ/લેપટોપ માં વપરાતી લીનક્સ ઓપરેટીંગ સીસ્ટમ છે. જે સર્વર અને કલાઉડ કોમ્પુટીંગ માં પણ લોકપ્રિય છે.
✔️ ઉબુન્ટુ એ દક્ષિણ આફ્રિકન ઉદ્યોગસાહસિક માર્ક શટ્ટલવર્થની યુ.કે.-સ્થિત કંપની કેનોનિકલ લિ. દ્વારા પ્રાયોજિત કરવામાં આવે છે.
✔️ કેનોનિકલ ઉબુન્ટુ સંબંધિત ટેક્નીકલ સેવાઓના વેચાણ દ્વારા આવક પેદા કરે છે, જ્યારે ઓપરેટિંગ સિસ્ટમ પોતે જ સંપૂર્ણપણે મફ્ત છે.
✔️ ઉબુન્ટુ પ્રોજેક્ટ મુક્ત સોફ્ટવેર વિકાસ સિદ્ધાંતો માટે પ્રતિબદ્ધ છે.
✔️ એ GNU જનરલ પબ્લીક લાયસન્સ (GNU GPL અથવા જીપીએલ) અંતિમ વપરાશકર્તાઓ લોકો, સંસ્થાઓ, કંપનીઓ નો ઉપયોગ કરવા સ્વતંત્રતાઓ, અભ્યાસ, શેર (નકલ) બાંયધરી આપે છે,
✔️ સોફ્ટવેર સુધારવા જે સૌથી વધુ ઉપયોગમાં લેવાતી મુક્ત સોફ્ટવેર લાયસન્સ છે.
✔️ એ GNU જનરલ પબ્લીક લાયસન્સ (GNU GPL અથવા જીપીએલ) અંતિમ વપરાશકર્તાઓ લોકો, સંસ્થાઓ, કંપનીઓ નો ઉપયોગ કરવા સ્વતંત્રતાઓ, અભ્યાસ, શેર (નકલ) બાંયધરી આપે છે,
✔️ સોફ્ટવેર સુધારવા જે સૌથી વધુ ઉપયોગમાં લેવાતી મુક્ત સોફ્ટવેર લાયસન્સ છે.
✔️ Berkeley Software Distribution (BSD) લાઇસન્સ સોફ્ટવેર પુનર્વિતરણ, ઉદાર મુક્ત સોફ્ટવેર લાયસન્સ એક કુટુંબ છે.
✔️ બર્કલે સોફ્ટવેર વિતરણ (BSD), એક યુનિક્સ જેવી ઓપરેટીંગ સિસ્ટમ માટે ઉપયોગ કરવામાં આવ્યો હતો.

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RaviROza #UbuntuOS #Gujarati

Watch “EJB Part-3 | EJB Types (Gujarati)” on YouTube

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EJB types
➡️ Session Bean : Session bean represents a single client inside the App Server.
➡️ Entity Bean : Entity bean represents a business object in a persistent storage mechanism.
➡️ Message Driven Bean : A message-driven bean is an enterprise bean that allows J2EE applications to process messages asynchronously.

#RaviROza #EJB #AdvanceJava #Jdk #Java #Gujarati

OS : Windows 10
Jdk : Version 8
IDE : Eclipse Mars
Server : Apache Tomcat 7

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Watch “EJB Part-2 | Usage of EJB (Gujarati)” on YouTube

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When to Use Enterprise Java Beans
➡️ To Simplify development of large scale enterprise level app.
➡️ To focus only on business logic of the app.
➡️ When the app is distributed : When the resources and data are distributed across multiple sites, Choose EJB when application will need to support multiple, concurrent users.
➡️ When the app is performance-centric : use of EJBs and the application server provide high performance and very good scalability.
➡️ Manage transactions : When transaction management is required to ensure data integrity, EJBs may be used.
➡️ Manage security : Separation of Business Logic

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OS : Windows 10
Jdk : Version 8
IDE : Eclipse Mars
Server : Apache Tomcat 7

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Watch “EJB Part-1 | EJB Introduction (Gujarati)” on YouTube

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An Enterprise Java Bean is:
➡️ A reusable component
➡️ A Java object
➡️ An encapsulation of enterprise business logic and data
➡️ Executed in a Containers

What is EJB?
➡️ EJB is an architecture for setting up program components, that run in the server, to develop modular construction of enterprise app.
➡️ It is reusable in multiple apps.
➡️ It is built on the JavaBeans technology to distribute components. It encapsulates the business logic of a web app.
➡️ It provides an architecture to develop and deploy component based enterprise apps.

Summary of video:
➡️ Java Bean Vs Enterprise Java Bean
➡️ Difference between RMI and EJB
➡️ EJB Architecture
➡️ Benefits of EJB
➡️ Restriction on EJB
➡️ Disadvantages of Enterprise Java Beans

RaviROza #EJB #AdvanceJava #Jdk #Java #Gujarati

OS : Windows 10
Jdk : Version 8
IDE : Eclipse Mars
Server : Apache Tomcat 7

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Watch “JSP Part-20 | Java Bean Properties and Methods (Gujarati)” on YouTube

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Java Bean
➡️ It is a reusable software component.
➡️ A bean encapsulates many objects into one object, so we can access this object from multiple places.
➡️ It provides the easy maintenance.

Java Bean is a java class that should follow following rules:
➡️ It should have a no-argument or zero argument Constructor.
➡️ It should be Serializable.
➡️ It should provide methods to set and get the values of the properties (getter & setter methods).

Java Bean Property types
➡️ Simple : It has a single value whose changes are independent of changes in any other property.
➡️ Indexed : Such bean supports a range of values instead of a single value.
➡️ Bound : A change to the property results in a notification being sent to some other bean.
➡️ Constrained : Here a change to the property results in validation by another bean in this property. The other bean may reject the change if it is not appropriate.

#RaviROza #JavaBeanPropertiesandMethods #AdvanceJava #Jdk #Java #Gujarati

OS : Windows 10
Jdk : Version 8
IDE : Eclipse Mars
Server : Apache Tomcat 7

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Watch “Cyber Safety Basics Part-2 (Conclusion)” on YouTube

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#RaviROza #CyberSafetyBasics #Gujarati

If you fail to take actions like Failure of individual data from Computer, Misuse of Identity, Stalk (hunt) or harass  an individual, group, or organization using Internet etc.,

CYBER-SAFETY ACTIONS

  1. Install OS/Software Updates
  2. Run Anti-virus Software
  3. Prevent Identity Theft
  4. Turn on Personal Firewalls
  5. Avoid Spyware/Adware
  6. Protect Passwords
  7. Back up Important Files

Cyber Safety Tips 👇
✅ હંમેશા લેટેસ્ટ સોફ્ટવેર ઉપડૅટ ઇન્સટોલ કરવા
✅ એન્ટી વાયરસ સોફ્ટવેર નો ઉપયોગ કરવો
✅ ફાયરવોલ સોફ્ટવેર નો ઉપયોગ કરવો
✅ કોઈ સોફ્ટવેર કે જેમ વારંવાર એડ આવતી હોય તો તેનો ઉપયોગ ન કરવો

❌ તમારા આઈ.ડી. અને પાસવૉર્ડ કોઈ સાથે શેર ન કરવા
❌ હંમેશા એવો પાસવૉર્ડ સેટ કરવો કે જેનો કોઈ અનુમાન ન કરી શકે.
❌ વેબસાઇટ અને મોબાઇલ એપ માંથી જરૂરી ન હોય ત્યારે લોગ આઉટ થઇ જવું.

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Watch “Cyber Safety Basics Part-1” on YouTube

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#RaviROza #CyberSafetyBasics #Gujarati

Cyber-safety is the safe and responsible use of Information and Communication Technology.

  • It is about keeping information & identity safe and secure.
  • Make sure that you are protected from cyber bullying (nuisance) and other harmful practices when browsing the internet.

Cyber Securities Outlines

  • Cyber-safety Threats
  • Consequences of Inaction
  • Cyber-safety Actions
  • Cyber-safety at Home & Work

Following discovered in this video tutorial-

  • CYBER-SAFETY THREATS
  • Viruses
  • Hackers
  • Identity Thieves
  • Spyware

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