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How to choose the id generation strategy when using JPA and Hibernate
...n with not much concurrent users, you can go for increment, identity, hilo etc.. These are simple to configure and did not need much coding inside the db.
You should choose sequence or guid depending on your database. These are safe and better because the id generation will happen inside the databas...
Is there an equivalent of CSS max-width that works in HTML emails?
...gt; elements is necessary, or else the <td> with the content will stretch to fill the entire <tr>. But this is definitely the best solution of the ones offered.
– Chris Strickland
Jan 22 '15 at 0:54
...
LinkedBlockingQueue vs ConcurrentLinkedQueue
... call poll(), wait a bit if you hadn't found anything, and then poll again etc... leading to delays when a new item comes in, and inefficiencies when it's empty (due to waking up unnecessarily from sleeps).
From the docs for BlockingQueue:
BlockingQueue implementations are designed to be used p...
How can I avoid Java code in JSP files, using JSP 2?
...e);
}
}
Or just adopt an MVC framework like JSF, Spring MVC, Wicket, etc so that you end up with just a JSP/Facelets page and a JavaBean class without the need for a custom servlet.
If you want to invoke some Java code to control the flow inside a JSP page, then you need to grab an (existing...
Default value of a type at Runtime [duplicate]
...s and new myType() for value types (which corresponds to 0 for int, float, etc) So you really only need to account for two cases:
object GetDefaultValue(Type t)
{
if (t.IsValueType)
return Activator.CreateInstance(t);
return null;
}
(Because value types always have a default cons...
How can HTML5 “replace” Flash? [closed]
...n ANY way. It's not vector-animated, it's not easy to use for an ANIMATOR, etc. Until there's a good authoring tool that makes flash-quality animations in SVG, CSS, HTML and some JS, it will not replace Flash for the animators. In terms of videos, the html5 video tag is what should be prevalent.
...
What is the difference between public, private, and protected?
...me why someone would use these? You have explained perfectly how they work etc.. I just would like to know the benefits of use for each of these. Thank you
– JamesG
Mar 18 '17 at 11:12
...
Why does this Java program terminate despite that apparently it shouldn't (and didn't)?
...as occurred - gets 0. Compare evals to true. Writes become visible to T... etc.
It reads currentpos.y first, before the y write has occurred (0), then reads currentpos.x after the x write, evals to true. etc.
and so on... There are a number of data races here.
I suspect the flawed assumption here...
When is TCP option SO_LINGER (0) required?
...nt of your server application misbehaves (times out, returns invalid data, etc.) an abortive close makes sense to avoid being stuck in CLOSE_WAIT or ending up in the TIME_WAIT state.
If you must restart your server application which currently has thousands of client connections you might consider se...
Understanding dispatch_async
... executing tasks such as background downloading, compression, computation, etc.
Note that the order of execution is FIFO on a per-queue basis. So if you send 1000 dispatch_async() tasks to the four different concurrent queues, evenly splitting them and sending them to BACKGROUND, LOW, DEFAULT and H...