Spring Archives - Bilal Kaun

Java

JDK 17 and ‘illegal reflective access’

As Java moves towards adopting security best practices – whether that’s JPMS or sealed classes – it’s evident that the best recourse is to pay down the tech debt and update the code to adopt these policies into your own code. Or if not your own code (in the case of external dependencies), then use updated libraries or different libraries that follow Java 9+ security best practices.

In the enterprise world that’s not always possible, so we discussed here resolution to one particular problem which occurs when migrating to JDK 16+ from JDK 11. These temporary fixes can buy you some time while allowing you to upgrade to a more modern versions of Java

By Bilal Kaun, 3 months3 months ago

Java

Spring JPA & Hibernate: Importing data before your beans are initialized

The problem At times, it may make sense to load system settings for an application from the database at ‘start time’. Sometimes this means attempting to query for such data early in a bean’s lifecycle, such as at construction time or slightly afterwards (e.g. ‘afterPropertiesSet()’ or init-method/@PostConstruct). This may work Read more…

By Bilal Kaun, 5 months5 months ago

Java

Why consecutive slashes in resource path fail in Jar files

Resource paths with consecutive slashes seem to work in the IDE (STS and IntelliJ) but fail to load when the application is deployed as a Jar file. Let’s see why. tldr; To speed lookup of resources and classes, Java’s Zip implementation uses hashes to match filenames initially rather than a Read more…

By Bilal Kaun, 2 years5 months ago

Java

Session JDBC Effect on Scheduling Thread Pool

When @EnabledScheduling annotation is visible in the context, Spring Boot’s Autoconfigurers usually create two Thread Pools ThreadPoolTaskExecutor ThreadPoolTaskScheduler As their names imply, the Task Executor is used for executing tasks, while the Task Scheduler is used to run scheduled tasks – such as those annotated with @Scheduled. The size of Read more…

By Bilal Kaun, 3 years3 years ago

Java

Controlling JDBCSession Timeout

You might have noticed that Spring Boot’s server.session.timeout does not apply if JDBCSession library is autoconfigured. Which means, the standard way to set default session timeout no longer applies. The appropriate way to set the timeout in this case is through the @EnableJdbcHttpSession annotation’s maxInactiveIntervalInSeconds like so. This is fine Read more…

By Bilal Kaun, 3 years ago

Java

Preventing Session Timeout Extension in JdbcSession

Among other things, Sessions are an important aspect of application security and establish a realm of trust between the end user and the application. I won’t be going into the details of JSesson here, nor the background of how Spring manages sessions. More information on Spring Session can be found Read more…

By Bilal Kaun, 3 years3 years ago