Seeing the exception when I call the GET method in RestTemplate com.fasterxml.jackson.databind.JsonMappingException: N/A at [Source: (StringReader); line: 1, column: 13700] (through reference chain: com.homedepot.merch.meter.model.ResultSet[“issues”]->java.util.ArrayList[0]->com.homedepot.me…
Tag: java
startActivity() in BroadcastReceiver
I am trying to create an application that calls the sender of an SMS as soon as the smartphone receives an SMS. This is my code: But it dials and calls the sender only when the application is in foreground, while I’d like it to work always. Using the debugger, the execution flows, but it is unable to st…
Why VSCode shows strange “@number” (like int[10]@9) for arrays when debugging?
This was a simple binary search code and while I was debugging it for my better understanding, I got this remark a = int[10]@9 in the debugging panel – what does it mean (especially “@9” part after the type)? Answer By default, the debugger shows the toString() value of an object. As arrays …
Java spring hibernate JPA @ManyToAll findAll() slow on large data, many subqueries created
I have 2 classes, Aircraft and Operator, with a one to many relationship from Operator to Aircraft. A findAll() call on the Operator table, which has around 10k rows, from the JPA Repository runs quickly, in just a few seconds, but the findAll() call on the Aircraft table, which has around 65k rows, sometimes…
Flyway Repeatable Script Throwing Table Does Not Exist Error
I am currently trying to trim down my versioned scripts into one baseline script (we don’t pay for flyway so is a pain). So I deleted my schema and attempted to run my one big script that contains everything I had. I exported the DDL out of my DBeaver client. However when starting my applications I am g…
Why filtering does not work with Spring Boot and MongoDB
Why filtering by import_created_at does not work? I have a Spring Boot Application and MongoDB as database. I have Mongo collection items and 2 documents there: I have entity classes for items: and and and and and And I have repository class: When I call the repo method findAllByFilters without filters (only …
Is there a way to get HTTP request parameter using wildcard?
We have a service that get values from formData in http requests. Some parameters are packaging1_1 or packaging1_2 or packaging1_3 etc We are using the following code to get the parameter value from HttpServletRequest request Is there any way to use the code with wildcard in the last number? e.g. Answer No, y…
How to write common pojo deserializer for json attribute which can be an object and an array both?
Background: I am getting mismatchedInputException, when parsing json. com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize value of type java.util.ArrayList<Data> from Object value (token JsonToken.START_OBJECT) Problem: nodes is a json-array which contains data, which can be …
SHA1 signature created in Java not being verified in PHP
I am creating an RSA signature in Java and sending it in the Auth header to a PHP server which is then verifying it. The problem is that although the signature is being verified in Java, it is failing in PHP. How do I fix this? My PHP code where I’m verifying the sign: Update: I am now signing like
Jetty Websocket Authentication
I play the Jetty Websocket use example here : https://github.com/jetty-project/embedded-jetty-websocket-examples (i use native-jetty-websocket-example) I just move from websocketpp (C++) to Java Jetty Websocket and i just wonder is there any way for me to authen the connection before the connection move to th…