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How should I unit test threaded code?
...thods in the callers' thread of control) that expose a synchronized public API -- instantiate multiple mock threads that exercise the API. Construct scenarios that exercise internal conditions of the passive object. Include one longer running test that basically beats the heck out of it from multi...
Hibernate SessionFactory vs. JPA EntityManagerFactory
... @MickaelMarrache the use of the JPA is to be preferred over the Hibernate API, because it is a Java Enterprise standard. Using JPA (and restricting yourself to it, without using Hibernate-specific features) improves application portability, i.e. you have the option to switch to a different persiste...
Latest jQuery version on Google's CDN
...vertent web breakage and no longer updates the file at
http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.js. That file
will stay locked at version 1.11.1 as well.
The following, now moot, answer is preserved here for historical reasons.
Don't do this. Seriously, don't.
Linking to major ...
Django REST Framework: adding additional field to ModelSerializer
...fields = ('id', 'name', 'my_field')
http://www.django-rest-framework.org/api-guide/fields/#serializermethodfield
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What is the maximum amount of RAM an app can use?
...tedThumbCacheInstance().addBitmap(thumbUri, thumbBytes);
My app targets API 19+ so devices are not old and these portions of available RAM are good enough for cache in my case (1% and 3%).
Fun fact: Android does not have any APIs or other hacks to get the amount of memory allocated to your app, ...
How to ignore SSL certificate errors in Apache HttpClient 4.0
...since 4.4 so here's the snippet that works for me and uses the most recent API:
final SSLContext sslContext = new SSLContextBuilder()
.loadTrustMaterial(null, (x509CertChain, authType) -> true)
.build();
return HttpClientBuilder.create()
.setSSLContext(sslContext)
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How to tell Jackson to ignore a field during serialization if its value is null?
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The API changed a bit with the 2.0 release.
– Programmer Bruce
Mar 11 '13 at 16:55
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If REST applications are supposed to be stateless, how do you manage sessions?
... think that facebook does a "database access" on every request of its REST API? Or Google for that matter? hint: no
– user177800
May 31 '14 at 15:56
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Java: recommended solution for deep cloning/copying an instance
... the classpath.
I deliberately omitted the "do-it-yourself" option - the API's above provide a good control over what to and what not to clone (for example using transient, or String[] ignoreProperties), so reinventing the wheel isn't preferred.
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Understanding Canvas and Surface concepts
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That is how drawing happens Canvas is the 2d drawing API. If you are going to draw o to a surface, you need to make a Canvas that points to its buffer to use the Canvas 2d drawing API to draw in to it.
– hackbod
Oct 13 '11 at 3:15
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