In the program of uploading files to a server location, instead of using absolute location for saving file to that path, relative path needs to be used. Program was working correctly for absolute path.
In the maven project with the following directory structure , I created a resources folder in the Read more…
Issue: I had deployed latest war file of my Java project into tomcat’s webapps folder but I could not see any changes reflected while running my project.
What I tried?
It looked like war file must not have been uploaded properly. So, I stopped the tomcat server Read more…
Password hashing is the new recommended way to store the password using hashing method (PHP 5 >= PHP 5.5, PHP7). Password hashing is used to encrypt the password similar to the way md5, sha1, sha256 etc do. But this method follows stronger hashing algorithm comparatively. There are two methods Read more…
Interceptors are components that intercept requests before passing to controller and responses before rendering the view. Interceptors can intercept request and response in our web application. With the help of interceptor we can check whether a user has the authority to execute a transaction on a particular object in the Read more…
Description: In one project we were invoking methods of a Moodle plugin from outside in the web app with the help of curl post requests. At the Moodle’s end, we have created a custom plugin and defined our methods in that. We are returning back json_encoded string Read more…
Document frequency and Term frequency are the terms that are generally used for finding relevance of the documents to the search query. When user types some word, then the number of documents containing the word returned in the result set is known as document frequency. Similarly, the number of times Read more…
1. Log in to your mandrill account with your credentials, you will see below screen after successful login:
Fig 1: Logged In user Screen
2. Click on the outbound tab in the left pane of the above screenshot:
Fig 2: Outbound tab view
3. In the top of Menu bar Read more…
Whenever a cron job is executed, one can get email notification of cron job execution if the cron job doesn’t run successfully or there is a bug in cronjob file.
These are the steps in Terminal
1.crontab -e
2.MAILTO = xyz@gmail.com
3.Write cronjob.
Below is Read more…
Blackboard LMS allows us to change the “course entry point” for Blackboard.
We can set up Blackboard so that user always go to the specific section of Course page when they enter the course. The default course entry page is termed as Home Page for the course.
STEPS :
1. Go Read more…
Problem 1: ERROR: org.apache.hadoop.hbase.ipc.ServerNotRunningYetException: Server is not running yet
While running the hbase shell sometimes we receive Server is Not Running Yet error while our hbase master server is running properly.
Solution: This problem occurs when we fetch the data from the hdfs for hbase Read more…
The syntax of main method in java is:
public static void main(String[] args) {
}
There are three keywords used in main: public, static, void
public: public keyword is the access modifier in Java which gives its access to the outside world. As class execution begins from main method Read more…
How to add Google Map in your project and show markers and InfoWindows for various locations using HTML and Javascript.
Google Map API is one of the most used APIs in websites and projects. We can use the API to show maps on a webpage. The API is Read more…
I am assuming you are working on code from branch A (it may be trunk as well) and have already made some changes locally. Now you find you can’t commit your changes to SVN because they are not stable yet.
First of all, you should have started working on Read more…
Introduction to DataBase Isolation Levels
Transaction specifies an isolation level that defines the degree to which one transaction must be isolated from resource or data modifications made by other transactions. Isolation Levels are described in terms of side-effects of concurrent access or modification by number of users at a Read more…
What are secure SSL Certificate?
Secure SSL certificate is used by most of the websites to prevent private and secure information of their users so that no third party could access them. When an SSL certificate is used, it encrypts the confidential information of users which becomes unreadable and inaccessible Read more…
2 ways that I know to get the full path of a process in linux:
1. /proc/ /exe is a symlink to the actual exe. Here’s what I get for a program eclipse running on my machine under pid 4825 with this command:
localhost:/home/Office # ls Read more…
First we should know what is overflow and underflow.
Overflow is a condition where value crosses the maximum prescribed size of a data type.
Underflow is a condition where value reaches the minimum prescribed size of a data type.
With Overflow and Underflow condition, either the program crashes, or an Read more…
During testing a website with Selenium, function given below can take screenshot that can help us in cases like when testcase fails and we need the screenshot to see what happened on UI.
Here is function to take screenshot:
public void screenshot(WebDriver driver, String fileName) {
try {
File src = ((TakesScreenshot Read more…
Cast means converting one data type to another data type.
Automatic Type Conversion
Automatic type conversion means programmer doesn’t need to write code for the cast. In Automatic Type Conversion, narrower data type is converted to broader data type automatically by Java. Automatic Type Conversion is also called Widening Read more…
Explain with an example which variables should become instance variables and which others should become static. Also when to use final with static and final without static? (JAVA)
INSTANCE VARIABLES: Variables that belong to the object of the class and each object can have its own value for Read more…
