Use of the static keyword in this context?

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• How to use the referential cursor in this context

  Hello everyone I want to create a procedure and I am able to create it, but it does not work as I want it to be
  Please suggest the best way.

  CREATE OR REPLACE PROCEDURE UPDATE_COMMAND(V_TABLE_NAME VARCHAR2, V_COLUMN_NAME VARCHAR2)
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  first of all I don't know how to refer to this v_coluimn_name which I use just after the fetch command.
  
  When I run the procedure it gives error
  
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  ORA-06550: line 1, column 7:
  PL/SQL: Statement ignored

  Prost wrote:
  I want the update command to be stored in a clob variable so that I can insert this variable in a column of a fictitious table, and then I'll get update of this table scripts manually.

  Well, what I gave just you out individual lines, so just adapt it to concatenate these lines in a CLOB variable for the loop process and then store you CLOB when finished. You should be able to handle that yourself.

  Still don't know why you want to do it right. Looks like a bad way to do something.

• Unusual use of the static getInstance factory class definition interface

  This question is prompted by a recent new to Java forum question asking about the differences between Interfaces and abstract classes. Of course, one of the standard things mentioned is that interfaces can't actually implement a method.
  
  One of my former clients, the 500 group, using interfaces as class factories. The interface defines a static class of the pubis with a static method public, getInstance, who is called to generate instances of a class that implements the interface.
  
  This architecture was very object oriented, made good use of polymorphism and worked very well. But I have not seen this used anywhere architecture elsewhere, and it seemed a bit convoluted.
  
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              return (abc) FactoryGenerator(new abcImpl(), abc.class);
          }
      }
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  1. each major functional area ('abc' in the above) has its own factory of interface
  2. each major functional area has its own implementation of this interface class
  3. There is a generator (FactoryGenerator) that uses the interface class ("abc.class") to determine the implementation to instantiate classes and return. The generator class can be configured at startup to control the actual class of return for a given interface.
  
  I should mention that the people who designed this whole architecture were not novices. They wrote very sophisticated multi-threaded code that rarely had problems, was high performance and was easy to extend to add new features (interfaces and classes of application) - pretty much plug-n-play with little, if any, side effects affecting existing modules.
  
  It is a process of best practices of factory design classes and methods? Please provide feedback about the use of an architecture like that.

  The way he explained to me at the time is that the interface uses standard naming conventions and acts as a template to make it easy to clone new modules: just change 'abc' to 'def' in three places and write a new class of "defImpl" which extends the interface and the new interface and the class can simply 'plug in' to the framework.

  There are in your pseudo code code in the interface to build a new abcImpl(). This deployment of a new plant means a change of this interface. If this is what is meant, it is poor. See java.util.ServiceLoader for an example of the right way to do it, with the implementation classes named in an external file.

  The generator class might use the information, if provided, to provide a new version of the class which would extend this default class.

  I hope so, but who is not exposed by your pseudocode.

  I never saw any 'Java' pattern that looks like this or any model where a contained interface a class.

  There are several examples in the JDK. Unfortunately I can't think of them right now. ;-)

  It seemed really complicated for me

  Me too.

  and it looks like the "versioning" aspect could be accomplished in a much simpler way.

  Indeed, he can see java.util.ServiceLoader.

• Is the responsibility of the private sector in this context error

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  Case studies of promotional Marketing and service APTCOWEB Articles - news

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  2014

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  Hi all

  I use Jdeveloper 12 c

  I do app with a jsf page (man.jsf) contains the static region (xxx.jsff)

  the static region contains a dynamic region and I define the scope in the tent (adfc-config) (backingbean extended, scope of the request, see scope)

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• use of the server for executable files VI

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  I tried to find a good explanation and example usage of VIserver to launch executables on client PC (XP) via a LAN to a PC (Win7) process controller. Basically, what I found for the controller is specified in this code snippet:

  

  The following was placed in the .ini file of the target at the time of construction to allow VIserver using an executable file (?):

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  lb

  Ben OK,

  Your messages made me a technique to load with distance and running an exe file, built in LV8.5:

  1. to load: the controller emits a "tasklist" command to a target. The objective produces an output file of tasklist which is read by the controller. If it concludes that the target is already loaded, the controller will execute it with an invoke command node 'run a VI '.

  2. If the target is not loaded, then a script file is executed on the target via plink of the controller. This command will also start running.

  3. all the subVIs must reside on the target, as you said, even if (as in my case), the target has no LV Developer Suite installed. I placed Traoré versions of files and folders to exe in the same folder.

  4. the .ini file in the compilation has changed as shown in the first post of this thread. No special settings were used in the compilation.

  This probably isn't the exact technique you had in mind, but it doesn't seem to work... Thanks again for your help.

  lb

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  Thank you!

  Hello

  Simple rules, there no notable performance only difference between Manager rules and filter expression. Please ensure that the indexes are created for the Expression column (they are automatically created for the rule Classes).

  Just to be complete: If you want to use several data structures and to define simple rules on the structures of the individual event, you can set a rule to structure class composite event and not really to define complex rules. For example, a rule configured for the table attributes class two alias, po and if maybe two simple rules that are associated with the simple event matching.

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  Rule condition 2:
      
          
          
  

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• Why not use the static methods - example

  Hello world
  
  I would like to continue the below thread about "why not use static methods.
  Why not use the static methods
  with the concrete example.
  
  In my small application, I need to be able to send keystrokes. (java.awt.Robot class is used for this)
  I created the following class for these "operations" with static methods:
  

  public class KeyboardInput {
  
       private static Robot r;
       static {
            try {
                 r = new Robot();
            } catch (AWTException e) {
                 throw new RuntimeException(e + "Robot couldn't be initialized.");
            }
       }
       
       public static void wait(int millis){
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       }
       
       public static void copy() {
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            r.keyPress(KeyEvent.VK_C);
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       public static void altTab() {
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                 // more methods like  paste(), tab(), shiftTab(), rightArrow()
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  You think it's a good solution? How could it be improved? I saw something Singleton vs somewhere of static methods. Wouldn't be better to use Singleton?
  
  Thanks for your comments in advance.
  lemonboston

  maheshguruswamy wrote:

  lemonboston wrote:

  maheshguruswamy wrote:
  I think a singleton might be a better approach for you. Just kill the public constructor, and provide a getInstance method to provide late initialization.

  Maheshguruswamy thanks for the tips on the steps create a singleton of this class.
  Perhaps you could say also why do you say that it would be preferable to use singleton? What is behind it? Thank you!

  In short, it seems to me that a single instance of your class will be able to coordinate actions across your entire application. If a singleton should be sufficient.

  But who doesn't answer why he expected prefer a singleton instead of a bunch of static methods. Functionally, the two are almost identical. In both cases, there is that a single 'thing' to call methods - either a single instance of the class or the class itself.

  To answer the question, the main reason to use a Singleton on a class of static methods is the same reason readers much of not static vs static decisions: polymorphism.

  If you use a Singleton (and and interface), you can do something like this:

  KeyboardInput kbi = get_some_instance_of_some_class_that_implements_KeyboardInput_somehow_maybe_from_a_factory();
  

  And then everything calling public methods of KBI has to know that there an implementor of this interface, without worrying about what concrete class is, and you can replace some implementation is appropriate in a given context. If you do not need to do, then the approach of the static method is probably enough.

  There are other reasons that may suggest a Singleton - serialization, persistence, use as a JavaBean pop to mind - but they are less frequent and less convincing in my experience.

  And finally, if this thing keeps updated a State between method calls, even if you can manage it with static member variables, it is more in line with the OO paradigm to make them non-static fields of an instance of this class.

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  How we store temporary in oracle result when we make this type of operation (extraction of data in fields and try to load them into a separate table on the fly.?)

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