Initial Capacity and Load Factor in HashMap are two parameters that affect its performance. Initial Capacity In HashMap The capacity is the number of buckets in the hash table, and the initial capacity is simply the capacity at the time the hash table is created. Default initial capacity is 16. Load factor In HashMap The…
There are most of the time when there is requirement for setting session timeout when user is idle for sometime. Like there are ajax requests going on for users who are logged in e.g notification call, new messages call. But the user is idle or leaves the browser open for long time so in that…
serialVersionUID In Serialization If we do not explicitly declare serialVersionUID during serialization then JVM generates this ID based upon the structure of class. And then if we implement another interface or any other class or change the structure of class then JVM will generate different serialVersionUID for the class. After that if we try to…
Singleton in java is a class which has only one instance in whole application and provides a getInstance() method to access the singleton instance. There are many classes in JDK which is implemented using Singleton pattern like java.lang.Runtime which provides getRuntime() method to get access of it. There are many ways to create singleton in…
Marker interface It is interface that neither have any type of method nor data members. If we implements this interface to any class then JVM add specific code or instruction in class byte code and provide additional behaviour at runtime.Marker interface is heavy process because JVM has to set up completely different task for it,we should…
GenericFormHandler And RepositoryFormHandler Classes In ATG Both of these classes in ATG are used to create a custom form handler to deal with user input and repositories. But these two classes have different purposes in terms of creating new form handler. The difference is GenericFormHandler Custom form handlers should typically extend GenericFormHandler, which: Is a…
Component-item-type and Item-type Both these attributes are use to link table column to other repository item. The difference is Component-item-type – When you are using one-to-many mapping and you are referring to other repository items i.e another item descriptor. e.g Album and Song are two different item-descriptor. An album can have multiple songs so there…
For logging you can use logging capabilities of built-in components of ATG. ATG provides GenericService class in order to use logging in your component smoothly. But If your component extends a non-ATG base class, and you are therefore unable to use GenericService as a base, you can still take advantage of ATG logging by implementing…
For creating nucleus components your component class must implement number of interfaces to get the desired functionality but we can simplify our work by extending only one class. ATG provides a base class that provides smooth integration into the ATG Nucleus: atg.nucleus.GenericService Properties loggingDebug loggingError loggingInfo loggingWarning name nameContext Methods resolveName(): Finds a component by…
Most components in ATG can be classified into one of the following categories: Service: A component that provides functionality on which one or more systems depends. Form Handler: A component to validate and manage form input data. Servlet Bean: A droplet to handle page display logic. An example of a service component is a scheduled service. Your server-wide…
Oracle IMPDP and EXPDP Oracle provides two very good tool for importing and exporting data dump very efficiently and in very simple manner using new data pump feature. There are two ways to import data using data pump. Using IMPDP directly without dump file. Using IMPDP with dump file. Things To Consider – Utility command…
There is following task is happening when you deploy any web-application which is developed in Struts 1.x, Step 1:- All Step of web-application deployment will be done first Process Steps of any web-application at deployment Step 2:- Because of configuring ActionServlet with <load-on-startup> tag, ActionServlet is initialized at container startup. Step 3:- Container invokes service(request,response)…
ORA-31679: Solved ORA-31679: Table data object “Table_Name” has long columns, and longs can not be loaded/unloaded using a network link When ? ORA-31679 error occurs when we try to import the data using impdp over a network link. Why ? When the remote database contains table data object that has long columns, and longs can not…
PHP 5.3.0 comes with many new features and one of important concept is Logging of Mail Function. What does it do ? Log all mail() calls including the full path of the script, line number, to address and headers. How does it work ? Go to your php.ini file. Find mail.log in that file. Enable…
ArrayList ArrayList is backed Array datastructure and Alllow Duplicacy,we can insert multiple null value in it.Array initial capacity is 16. ArrayList make a contiguous memory allocation,for contiguous memory allocation arraylist always firstly create a space then insert a value in it.So arrayList require two step for insertion first create space then insert value. If we insert any value in ArrayList it take more…
