java itext pdf remove text

java itext pdf remove text

java itext pdf remove text

Earlier, we talked about stateful and stateless session beans However, we have so far avoided the real differences between them This grouping of bean types centers on the concept of the conversational state A particular business process may involve more than one session bean method call During these method calls, the session bean may or may not maintain a conversational state This terminology will make more sense if you think of each session bean method call as a conversation, or exchange of information, between the client and the bean A bean that maintains conversational state remembers the results of previous exchanges, and is a stateful session bean In Java terms, this means that the bean will store data from a method call into instance variables and use the cached data to process the next method call Stateless session beans don t maintain any state.

DynamicLinkLibrary (DLL) that allows you to create Behaviors. In the Solution Explorer right-click the References folder and left-click Add Reference, as in Figure 7-25.

In general, stateful session beans tend to model multistep workflows, while stateless session beans tend to model generalpurpose, utility services used by the client The classic example of maintaining conversational state is the e-commerce website shopping cart When the client adds, removes, modifies, or checks out items from the shopping cart, the shopping cart is expected to store all the items that were put into it while the client was shopping As you can imagine, except for the most complex business processes in an application, most session bean interactions don t require a conversational state Putting in a bid at ActionBazaar, leaving buyer or seller feedback, and viewing a particular item for bid are all examples of stateless business processes As you ll soon see, however, this does not mean that stateless session beans cannot have instance variables.

To add a view, navigate to Structure Views, and click the Add new view link at the top of the page, as shown in Figure 7-8. The View name setting is the machine-readable name, used when theming the site. The View description setting is a short description that appears on the views administration UI. The View tag is also used on the administration UI to sort views; any value entered here will appear in the Tag drop-down, as shown in Figure 7-7. View type was discussed in the previous section; your selection here determines the fields available on the next page; click Nex t to continue.

Even before we explore any code, common sense should tell us that session beans must cache some resources, like database connections, for performance reasons The critical distinction here is client expectations As long as the client does not need to depend on the fact that a session bean uses instance variables to maintain conversational state, there is no need to use a stateful session bean..

C:\Program Files (x86)\Microsoft SDKs\Expression\Blend\Silverlight\v4.0\Libraries\, or wherever you installed Blend on your computer. When you find it select it and click OK, as I am doing in Figure 7-26.

A session bean has a lifecycle. This mean that beans go through a predefined set of state transitions. If you ve used Spring or EJB 2, this should come as no surprise. If you haven t, the concept can be a little tricky to grasp.