I am trying to mask an xml document where some specific tags are present. I have created a java app which contains saxon9he as dependency. I have multiple use case, some are straight forward but some are conditional. Assuming the below given <Prsn> tag is present at multiple different locations: Input x…
Tag: java
Java mmap MappedByteBuffer
Let’s say I’ve mapped a memory region [0, 1000] and now I have MappedByteBuffer. Can I read and write to this buffer from multiple threads at the same time without locking, assuming that each thread accesses different part of the buffer for exp. T1 [0, 500), T2 [500, 1000]? If the above is true, is it possibl…
SortedSet + Hibernate’s @SortNatural + Comparable not sorting elements when fetch from DB
I know similar questions have been asked before, I looked through them but still can’t figure out why in particulary this case sorting is not working. I have 2 Entities – Category and Transaction with relations OneToMany. Inside one category there can be many transactions and One transaction belon…
Spring AOP and AspectJ on same method
I have a question about using aspectJ and spring aop method intercepting. I created 2 annotations: @AJTest and @SAOPTest. registered it and other and register it and added it to my method in controller Application class but when i call it by http://localhost:8080/test?firstParam=test&secondParam=2 i can&#…
Apache Ignite: What is best practice to fire/emit user defined events in Java?
I want to emit a user defined Ignite event but haven’t found any examples or implementations other than the Ignite sources, which uses non-API methods. Can someone explain how to do this? TIA Answer After re-reading the docs i found a useful hint. The brief description of recordLocal(Event evt): After b…
I want to store Zk4500 fingerprint reader template in k50 biometric attendance machine both are from zktecho
I want to store Zk4500 fingerprint template in k50 biometric attendance machine . I am using java for zk4000 scanner and python for communicating with attendance machine(k 50). I am trying to store this template in fingerPrintTemplateForDB1 = FingerprintSensorEx.BlobToBase64(template, templateLen[0]); I think…
@RequestScoped + new thread
We use javaEE RequestScoped with OpenLiberty and new threads via EJB @Asynchronous. I am just curious what the actual value comes from when we inject RequestScoped bean inside a new thread? Will the RequestScoped bean be freshly initialized? Or will it be pulled from the latest request? Answer In OpenLiberty,…
JavaFX no TouchEvents
On my (Windows) Surface Go 2 tablet I’m not able to retrieve any (multitouch) TouchEvents. I tried it with several Java/FX versions. Even with JavaFX 17 (and older versions) no TouchEvents events are generated only mouse events. Is there some sort of configuration parameter needed? Answer I get TouchEve…
Way to scan contents of a singular array index?
There is an array in my code that includes the names to random items delimited by a /n (i think). the splitLines[] array is an organizational method that collects strings and integers separated by a delimiter in a file. The file is formatted as <<Prize’s Name 0>>t<<Prize’s Price 0>>n &…
Application build is successful but getting error: ‘no main manifest attribute, in app.jar’ while running the image
I am trying to deploy my spring boot application on a docker. I have created a docker file as follows. The docker file builds fine but when I run the image it throws the following error: Please note that my application runs on JDK 11, maven build and already added dependency for spring-boot-maven-plugin. I co…