New dev bookmarks added in the 6th week of 2018. Hot topics include:
New codingmarks added in the 5th week of 2018
New dev bookmarks added in the 5th week of 2018. Hot topics include:
A Java cache example with Guava
Last week I showed you how to increase the performance of multiple java calls by making them asynchronous and parallel. This week we take a look at another potential performance booster, you should always keep in mind - caching.
Let’s imagine a scenario where you call a REST service and you know the returned values don’t change very often. In this case you really need to consider caching the response. We will use Guava’s provided caching capabilities to implement such a cache for this example.
New codingmarks added in the 4th calendar week of 2018
New dev bookmarks added in the 4th calendar week of 2018. Hot topics this week:
How to make parallel calls in Java with CompletableFuture example
Some time ago I wrote how elegant and rapid is to make parallel calls in NodeJS with async-await and Promise.all capabilities. Well, it turns out in Java is just as elegant and succinct with the help of CompletableFuture which was introduced in Java 8. To demonstrate that let’s imagine that you need to retrieve a list of ToDos from a REST service, given their Ids. Of course you could iterate through the list of Ids and sequentially call the web service, but it’s much more performant to do it in parallel with asynchronous calls.