This article is intended for readers who are curious to knowhow Java IO operations are mapped at the machine level; and what all things the hardware does all the time when your application is running. I am assuming that you are familiar with basic IO operations such asreading a file, andw...
JavaHashMapis a member of theCollections frameworkand stores key-value pairs. Each key is mapped to a single value, and duplicate keys are not allowed. In this tutorial, we will learnhowHashMapinternally stores the key-value pairs and how it prevents duplicate keys. 1. A Quick Recap ofHas...
Internally, a manager works with another façade: the org.apache.catalina.Session interface. The UML diagram for the session-related types are given in Figure 9.1. Note that for brevity, the org.apache.catalina prefix on Session, StandardSession, and StandardSessionFacade has been omitted. 在...
Internally, a user is represented by the inner class User. The first user has the user name ken and password blackcomb. This user has two roles, manager and programmer. The second user's user name and password are cindy and bamboo, respectively. This user has the programmer role. Then, ...
The persistence context is in JPA theEntityManager, implemented internally using an HibernateSession(when using Hibernate as the persistence provider). The persistence context is just a synchronizer object that tracks the state of a limited set of Java objects and makes sure that changes on those ob...
Some application functionality can be delegated entirely to managed services such as Amazon S3, or created without using any internally developed code. There is no need to test these managed services, but you do need to test the integration with these services. How to test serverless You are...
it uses a façade class StandardSessionFacade in the org.apache.catalina.session package. Internally, a manager works with another façade: the org.apache.catalina.Session interface. The UML diagram for the session-related types are given in Figure 9.1. Note that for brevity, the org.apache...
How Does Script Debugging Work Internally? 發行項 2004/02/15 Every now and then someone will ask me how the behind-the-scenes magic works that allows you to debug scripts. Darned if I know. While the rest of the script team was busy implementing the debugging interfaces, I was working ...
(Recall that in XML, element names are case-sensitive, so this kind of specification works much better in XHTML than it would in plain HTML, because HTML is case-insensitive). In a pattern-matching specification such as XPath, the specification /h1/h2 selects all h2 elements that lie ...
Two other things also happen internally when thenewkeyword is placed before the call toRect. First, the built-in functionObject.create()is called with the object inRect.prototypeas parameter. This call creates a new object, and this object receives the object inRect.prototypeas its prototype....