Hi sir, I have been working with one application i dont know whats best and how to begin it please help me with it. Problem statement: I have a application it's a attendence application for teachers. Every person needs to submit the week's attendence by tueseday. few people are forgetting it. I have all the people list who have not submitted attendence by tueseday morning everyweek. the IP addresses of them. Now (1).I want to write a program which ...
Following features are provided by the Apache JMeter.It might test different server types: 1. Web – HTTP & HTTPS 2. JMS 3. Database through JDBC 4. SOAP 5. LDAP 6. Mail - POP3(S) & IMAP(S)100% Java purity & complete portability.Concurrent sampling is allowed by the full multithreading framework, by various threads or simultaneous sampling of functions by the help of separated thread groups.Precise timings and fast operations ...
The Apache JMeter,being a desktop application has been designed in a way that it helps to load test client or server software. It is purely one hundred percent Java desktop application. Performance of the given could be tested by it. • Static files • CGI scripts • Java objects • FTP servers • Java Servlets • Databases JMeter is used in load testing simulation of a network, object or a server. Test scripts are also created by ...
Struts framework has been organized in twelve “top leveled packages”. It consists of three hundred interfaces and classes. Interfaces as well as classes are provided by struts framework to work along with controller or presentation, with custom tag libraries support. The Struts view is detailed here: The Struts Controller Components: All user requests are handled by the Struts Action Servlet. A request is been received, URL is interpreted and Configuration files ...
Struts1 extends the abstract base class by its action class. The problem with struts1 is that it uses the abstract classes rather than interfaces.While in Struts 2, an Action class implements an Action interface, along with other interfaces use optional and custom services. Struts 2 provides a base ActionSupport class that implements commonly used interfaces. Although an Action interface is notnecessary, any POJO object along with an execute signature can be used as an Struts 2 Action object.Struts ...
Simple POJO based ActionsThread SafeSimplified testabilityAJAX SupportjQuery PluginAJAX Client Side ValidationDojo Plugin (deprecated)Template SupportEasily extended with PluginsResult types are supportedREST Plugin (Extension-less URLs, REST based Actions)Spring Plugin (Dependency Injection)JFreechart Plugin (Charts)Rome Plugin (RSS Feeds)Convention Plugin (Action Configuration through Annotations & Conventions)Hibernate PluginjQuery Plugin ...
By using web form in a typical or standard Java EE web application, information gets submitted to the server. Information is then sent on to the Java Servlet, which will be performing: • Information Processing • Interaction with a database • HTML formatted response is produced. This information could also be passed on to a JSP that brings out the similar results. For larger projects, they are not suitable and it becomes tough to do the separation of the ...
Apache Struts are used for development of the web based application, being an open sourced framework. It is free. Web based applications are entirely different as compared to the typical sites because the web applications make dynamic responses for request. They are dynamic in their nature and may interact with business logic engines and databases for customizations of responses. Web applications are based at: • Java Server Pages • Page design code ...
Pure Java and Polyglot: It is written in Java language. Components and pages can be coded in Scala or Java Groovy.Convention over Configuration: “Endless” XML configuration files are of no more use. Meta-programming & Dependency injection via naming conventions and annotations.Highly productive: Live class reloading is the time b/w an error observations and fixing it in seconds.Scalable: On a single server, it Scales up big. Also, it works good in a cluster.Advanced Exception ...
For Java web applications, Apache Tapestry is open source & component oriented framework for implementations of the applications according to the model view controller pattern, or architectural pattern. Basic focus of the Apache Tapestry is at easy usage and productivity of the developer. Following is being offered by it. • Focuses at the developer productivity. • Modular approaches for the web development • Focuses at easy usage. • XML configurations elimination. ...
Apache Velocity is used by various common application types, which are as following. Web applications: HTML pages are created by the Web designers for dynamic information, with placeholders. Frameworks that support velocity or the VelocityViewServlet process the page.Source code generation: Based at templates SQL, Java source code or PostScript are generated by the Velocity. Velocity is used by various commercial development software packages and open source.Automatic emails: ...
Different technological combinations make an Apache Velocity. Template engine is the Apache velocity’s central component. Heavily adopted template engine is the Apache Velocity in Java industry. It is used widely by the Programmers. Template engine’s overview would be discussed in this post. A model is transformed to a resultant artifact by template engine, by using instructions which are referred as a template. Major components present are: 1. Model ...
Clients of Apache POI API are index builders, content management system, web spiders and many other text extraction applications. Apache POI is used by these applications excessively so that to do the manipulation of their operations. Question arises that why one shall use POIFS, XSSF and HSSF? Answers to these questions are as following. You can use POIFS in case your documents have been written in format OLE2. It makes you read the documents that ...
Apache POI project consist of the following components. Poor Obfuscation Implementation File System (POIFS): It is involved in writing and reading the format of the MS OLE 2 Compound document. All MS Office files are basically OLE files and this component is POI element’s basic building block. POIFS assist to read variety of files.Horrible SpreadSheet Format (HSSF): Microsoft Excel (XLS) format file are read and written by it. Files could be read by it which is being written ...
Apache POI is apache project which provides the access of MS format files to Java APIs. POI means Poor Obfuscation Implementation. It is a great API for MS document format access. Java programmers find it to be a best solution. APIs are present in POI to manipulate different formats of files which are based at the MS OLE 2 Compound Document, using pure Java. By using Java, you can write/read MS Excel files. A spreadsheet could also be created through Cocoon serializer. HSSF is the pure Java ...
In market, various application servers are present. To make a choice b/w them is a tough task. B/w them, Tomcat is one of the best choice. Tomcat offers these features which make it different from other competing solutions. Light and Fast: Tomcat is a highly optimized and light weighted servlet container. While it servers JSPs, everything is outperformed which includes open source based projects like JBoss and Geronimo.Scalable and Flexible - Tomcat is preferred by the developers ...
Apache Tomcat is considered to be open sourced “software implementation” of the JavaServer Pages technologies & Java Servlet. Java community process is involved in development of JavaServer Pages & Java Servlets. Apache Tomcat gets developed in open participatory environment. This is released in Apache License version 2. Best of breed developers worldwide are collaborated to create it. You can take an active part in this development project. Mission critical ...
Usually it has been seen that user don’t stay bound to follow the rules. Therefore it is general rule to deal, with exceptions. Different exceptions would be discussed in this post which are based upon those boundaries which are crossed by them. External Boundaries /Expected Exceptions: Example of this exception is FileNotFoundException. API boundries are crossed by it and gets exposed to users. Such kind of exceptions are enlisted in clause “throws”.They shall be handled with proper ...
Levels and priorities for the messages are supported by logging. Content severity shall be made sure. Use these guidelines to describe the messages severity. fatal – Severe kind of errors which would result into premature termination. Expect them to be visible instantly at the status console. Internationalization shall also be seen.error - Other unexpected conditions or runtime errors. Expect them to be visible immediately at the status console.warn - Depreciated APIs usage, ...
Standard distribution includes these jars. commons-logging.jar: Following are included in the commons-logging.jar o Java commons logging API o For Log4J, thin wrapper Log implementations o LogFactory implementations commons-logging-api.jar: Java Commons Logging API, built-in Log simpleLog implementations & LogFactory implementation are included. Commons-logging-adapters.jar: Adapters are included in it to 3rd part log ...
To a logger, all messages get logged. Such messages logging is dependent at the methods which correspond to the priority. The interface org.apache.commons.logging.Log details these methods to be used for writing log. Java Code: log.fatal(Object message); log.fatal(Object message, Throwable t); log.error(Object message); log.error(Object message, Throwable t); log.warn(Object message); log.warn(Object message, Throwable t); ...
log.fatal(Object message); log.fatal(Object message, Throwable t); log.error(Object message); log.error(Object message, Throwable t); log.warn(Object message); log.warn(Object message, Throwable t);
For using the Java Common Logging SPI, use these import statements in Java class file. Java Code: import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; It shall be noted that few components which use JCL might extend the Log or may be able to give “component specific” LogFactory implementation. Initialize & declare log attributes for each class definition, as following: Java Code: public class CLASS { private ...
import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory;
public class CLASS { private
Log4J is considered to be the most frequently used library, for logging. Log4J present in your application has integration details which will be discussed in this section. A property file and system properties are used to configure Log4J. log4j.configuration=log4j.properties This system property is used for specification of the Log4J configuration file naming. Default configuration file would be log4j.properties, in case it is not specified. log4j.rootCategory=priority ...
Java Commons Logging SPI shall be configured for using logging toolkits. A bridge is provided by the Commons Logging to write log messages. Message logging is only supported by it and no API configuration is supported for the logging system. Java Commons Logging configuration is dependent upon logging toolkit. Java Commons Logging doesn’t hold responsibility for: Underlying library initialization.Underlying library configuration.Underlying library shutdown. ...
Java Commons Logging uses these base abstractions. • Log- the basic logger • LogFactory i.e. How a Log instances is created A specific log implemenatation specification is quite useful. LogFactory implementation is specified by the advanced users. These discovery processes are used by the default LogFactory implementations. • The org.apache.commons.logging.Log attribute shall be looked for. Java code can be used for setting these attributes. Properties ...
Logging information is very important while a library is written. Numbers of logging implementations are there in market. A specified logging library usage cant be imposed by a library at the application. Logging package is considered to be an ultra thing bridge among various logging implementations. Library using common logging APIs might be used along with some logging implementations, at the run time. Commons logging provides support for different logging implementations. For others, ...
To do communication with non-trusted web applications or websites, extra care shall be taken while using the default credentials. Activation of the preemptive authentication is done, or for a specific authentication when credentials have not been given explicitly and default credentials would be used by the host HttpClient so that to get authentication with the targeted site. To avoid giving the critical & sensitive credentials to some non-trustable website, you shall ...
Within HttpClient, preemptive authentication can be enabled. HttpClient sends the response of basic authentication before unauthorized is given by server, in preemptive authentication mode. This will be reducing overhead for connection making. To enable it, use this code. Java Code: client.getParams().setAuthenticationPreemptive(true); For preemptive authentication, default credentials are required to be set for proxy host or target. Preemptive authentication will ...
client.getParams().setAuthenticationPreemptive(true);
Exception types which might be encountered to a HttpClient when HTTP methods are executed, are as following: 1. protocol exceptions 2. transport exceptions In regular use of the HttpClient, all these exceptions would not propagate to user. Internally handled exceptions by HttpClient have been marked as internal. I. Transport exceptions II. HTTP transport safety III. Protocol exceptions IV. Custom exception handler V. ...
Video Sponsor Sponsor 
Java Software News 
Sponsor Recent Forum Threads Sponsor 
Recent Comments
PDF to TIFF Conversion & Control...
Today, 11:39 AM in Java Software