How can I add a attribute to the current flow file when developing an Apache NiFi cusom processor. What I want to do is adding a new attribute (or at least update a current attribute) to the current flow file with calculated value. Or is there an already built processor that I can use? Answer NiFi supports se…
insert data stored in array list in excel using java
Its been a while i m trying to create a excel sheet to store the crawled data in a table format in a excel , the data is fetched from a url and stored in a array list , this data is needed to be stored in a array list ` Answer Your code is globally correct it has only
Eclipse – Stuck “processing jax-rs changes”
I have installed Eclipse Mars2 and when I try to save changes I got a message saying “Processing JAX-RS changes… (Waiting)” and Eclipse freezes for a couple of minutes. I’m developing a spring-mvc maven based application using jboss as server (I don’t know whether this is relevan…
Specifying Java version in maven – differences between properties and compiler plugin
I’m not very experienced with Maven and while experimenting with multi-module project I started wondering how can I specify Java version for all my child modules in parent Maven pom. Until today I was using just: …but when researching I found that you can also specify Java version in Maven compile…
Is it possible to change order of attributes when toJson()?
Let’s take this example. I have a pojo class as below. public class MyRecord{ private String name; private String id; //constructors and getters,setters } when I get the toJson(new …
Spark – Divide int with column?
I’m trying to divide a constant with a column. I know I can do but how can I do (90).divide(df.col(“col1”)) (obviously this is incorrect). Thank you! Answer Use o.a.s.sql.functions.lit: or o.a.s.sql.functions.expr:
How to ignore “null” or empty properties in json, globally, using Spring configuration
I’m trying to return only the properties that have values, but the null ones are also being returned. I know that there’s an annotation that does this ( @JsonInclude(Include.NON_NULL) ), but then I need these in every single entity class. So, my question is: Is there a way to configure this global…
How to use RxJava combineLatest operator with more than 9 observables
I’m using RxJava and I want to combine 12 different observables using the operator combineLatest. I saw a function prototype that takes a list of observables and an implementation of FuncN but I’m …
Java Scanner input with if else statement
Hi I’m new to java and trying to make a Quiz to practice. I wanna make a Question where the user has to combine words from to categories to pairs. Like A1 B4 C3 D2. What I did now is using an if else statement to check if the input is the correct answer, but it only works with 1A.
Netflix Feign – Propagate Status and Exception through Microservices
I’m using Netflix Feign to call to one operation of a Microservice A to other other operation of a Microservice B which validates a code using Spring Boot. The operation of Microservice B throws an exception in case of the validation has been bad. Then I handled in the Microservices and return a HttpSta…