I have below three code snippets all doing the same thing: creating in-memory authentication. So how it impacts defining it in different method names? registerGlobal configure configureGlobal …
Simple calculator program in Java
I am a newbie coder in Java and I am trying to make this calculator in java where a user can enter two numbers and select the operation to be done on those numbers. However when the code comes to selecting the operator it skips the user input and the if statement and directly implements the else statement. Answer Add
Confirmation of HTTP endpoint for SNS Subscribers
When I create a SNS topic using cloud formation and at the same time configure a HTTP endpoint it is possible that the HTTP endpoint might not be functional at that time. So is it possible to set the …
Scheduler not running in Spring Boot
I have created a Spring Boot application. I have configured my class that contains the scheduler method startService(). Below is my code : Service Class : package com.mk.service; import org….
Mapping a stream of tokens to a stream of n-grams in Java 8
I think this is a fairly basic question concerning Java 8 streams, but I have a difficult time thinking of the right search terms. So I am asking it here. I am just getting into Java 8, so bear with me. I was wondering how I could map a stream of tokens to a stream of n-grams (represented as arrays
Trying to learn Spring: BeanCreationException: Error creating bean with name
Started to learn “Spring in Action” and got a trouble on the very first chapter. I have simple Spring application, built with Maven: pom.xml <project …
IndexNotFoundException[no such index]
I was running my first elasticsearch test case, I am using Java as the solution perspective to do elasticsearch experiment. it works perfectly fine in eclipse Debug Mode, the debug mode result: {…
Substituting parameters in log message and add a Throwable in Log4j 2
I am trying to log an exception, and would like to include another variable’s value in the log message. Is there a Logger API that does this? Answer Have you tried looking at ParameterizedMessage? From the docs Parameters: messagePattern – The message “format” string. This will be a String containing “{}” placeholders where parameters should be substituted. objectArgs – The
How to get response body in Zuul post filter?
How it is possible to read a response body while using Zuul as a proxy in post filter? I am trying to call the code like this: Answer I’ve managed to overcome this. The solution consists of 4 steps: Read ctx.getResponseDataStream() into a ByteArrayOutputStream Copy OutputStream to 2 InputStreams. Use one of it for your custom purposes. Use the second
how to get Indian Time Standard from in java?
I want to know date and time in Indian standard time and I don’t want to use my system time and date. I have never used Network Transfer Protocol (NTP) but by browsing through internet i think ntp can …