ADF : JSPX and JSFF onPageLoad display Popup

ADF : JSPX and JSFF onPageLoad display Popup

1. JSPX page load

  a. <f:view> has beforePhase , afterPhase property.
  b. <af: form> -> showPopupBehaviour  - onLoad
       http://andrejusb.blogspot.in/2012/03/open-adf-popup-on-page-load.html
  c. before loading this jspx page -> have method call activity in the taskflow (but by that time page would not have loaded so popup might not display)

2. JSFF page load

       a. <af: Popup> -> below that <af: commandButton visible="false" binding="Bean.myButton">
            in getter method of myButton -> Popup.show()
          [Note : button shoud be below the popup component ]

PUZZLE : Simple puzzle questions : Ans

PUZZLE : Simple puzzle questions : Ans

1. instead of weighing 4 and 4, take 3 and 3.
    In 1st weigh -> if you get any difference, then take all 3 higher one.(Note: if there is no difference, then left out balls will be 2, you can use these 2 for next weight)

2. instead of thinking to cut in different degree angles.
    1st cut   : half
        keep 2 half cakes one on another.
    2nd cut  : quarter
        keep all 4 quarter pieces one on another
    3rd cut   : 8 equal pieces.

3. distribute coins as shown below.

PUZZLE : Simple puzzle questions

PUZZLE : Simple puzzle questions

1. I have 8 balls. among 8 one ball weigh little more. In how many try will you identify the ball which weigh's more.

2. I have a cake, i will give you 3 cut's , you need to make 8 equal pieces in 3 cuts.

3. I have 1000 gold coins and i have 10 sacks, you need to put all 1000 gold coins among 10 sacks.
    If i ask you any number between 1 to 1000, you should be able to give coins in terms of sacks.
    you need think and arrange the coins in each of the sack. (eg: after arranging if i ask you to give 205   coins,    you should be able to give in terms of sacks).

Ans : http://pavanadf.blogspot.in/2015/12/puzzle-simple-puzzle-questions-ans.html

ADF : ViewAccessor(A,B,C) customize ViewAccessor(A,B)

ADF : ViewAccessor(A,B,C) customize ViewAccessor(A,B)

1. If In my drop down getting values from VA(A,B,C) based on viewcriteria
2. If i want to filter again based on my requirement VA(A,B) and remove C

3. If you have requirement that on change of some thing in UI, then VORowImpl will not call by default, in that case we need to call ROImpl methods. either by VO.execute or VO.getCurrentRowImpl.method() as shown below....

ADF : Navigation in Unbounded and Bounded Task Flow

ADF : Navigation in Unbounded and Bounded Task Flow

1-jspx to jspx
2-jspx to bounded task flow(which has jspx)
3-jspx to bounded task flow (which has jsff) 
4-jsff to jsff
5-bounded task flow to bounded task flow

http://adfwithejb.blogspot.in/2012/06/navigation-in-unbounded-and-bounded.html

ADF : Download Image from BLOB column using Servlet.

ADF : Download Image from BLOB column using Servlet.

ADF : Upload Image to BLOB column

ADF : Upload Image to BLOB column

Upload Image ADF

1> af:form -> useUpload -> true (if you are using jsff, then you can add to the parent jspx)
2> AdminBean ->  declare UploadedFile file -> file assign to value of inputFile in UI.
3> AdminBean -> keep it in session scope
3> weblogic.xml -> Enable getRealPath() results for archived web apps -> check this option

https://www.youtube.com/watch?v=cDz9V_mxlPo

JAVA : Algorithms : BinaryTree implementation

JAVA : Algorithms : BinaryTree implementation

Add method

Search method

JAVA : JVM Architecture

JAVA : JVM Architecture

eg : -Doracle.adfm.usemds=true -Xms256m -Xmx1024m -XX:PermSize=96m -XX:MaxPermSize=1024m -XX:CompileThreshold=8000 -Djbo.debugoutput=silent

JAVA : SingleTon correct Implementation

JAVA : SingleTon correct Implementation

As discussed in previous session, there are many ways that singleton can break.
We can over come with those situations by implementing the singleton as shown below.

JAVA : SingleTon Break

JAVA : SingleTon Break

Overcome

Overcome

• Preferred way is not to implement Cloneable interface as why should one wants to create clone() of Singleton 
• And if you still do, then just throw Exception from clone() method as “Can not create clone of Singleton class”.

JAVA : Singleton Implementation

JAVA : Singleton Implementation

• Synchronization is very expensive when we are talking about the performance. 
• We can see that the synchronized method getInstance does not need to be checked for syncronization after the object is initialized

JAVA : HashSet -> Equals and hashCode

JAVA : HashSet -> Equals and hashCode

1. In HashSet(value) -> if we are adding string or int as then no need of equals and hascode override, If we are using object (Eg : Employee) as then we need to override equals and hashcode method.

Below screen shot, since we are going to use Employee object in HashSet, If we dont override hashCode method how HashSet behaves.

WithOut hashCode override:

With hashCode override:

Ref: https://www.youtube.com/watch?v=IwUwIrz9Ge8

JAVA : HashMap -> Equals and HashCode

JAVA : HashMap -> Equals and HashCode

1. In HashMap (key, value) -> if we are adding string or int as key then no need of equals and hascode override, If we are using object (Eg : Employee) as a key then we need to override equals and hashcode method.

Below screen shot, since we are going to use Employee object as a key in HashMap, If we dont override hashCode method how HashMap behaves.

WithOut hashCode override:

With hashCode override:

Ref : https://www.youtube.com/watch?v=IwUwIrz9Ge8

EXCEL : Check 1st column value in 2nd column, if not there then add 1st column value in 4th column.

EXCEL : Check 1st column value in 2nd column, if not there then add 1st column value in 4th column.

JAVA : HashMap Implementation

JAVA : HashMap Implementation.

Ref : https://www.youtube.com/watch?v=c3RVW3KGIIE

JAVA : Stack implementation using Array.

JAVA : Stack implementation using Array.

Assuming stack size is 3.

JAVA : COLLECTION Tips

1. Check Duplicate in collection.

2. Want to add objects in order

3. SORT HASHTABLE -> JUST CONVERT HASHTABLE TO TREEMAP (Automatically will be sorted)

public static void main (String[] args) {

Hashtable<String, String> ht= new Hashtable<String, String>();

       ht.put("zac", "Chaitanya");

       ht.put("abc", "Ajeet");

       ht.put("yyt", "Test");

       ht.put("ddc", "Demo");

       ht.put("ssa", "Anuj");

    Map<String, String> map = new TreeMap<String, String>(ht);

    for(Map.Entry<String,String> entry : map.entrySet()) {

          String key = entry.getKey();

          String value = entry.getValue();

        

          System.out.println(key + " => " + value);

    }

OR

    Map hm = new TreeMap(ht);

    Set<String> keys = hm.keySet();

        for(String key: keys){

            System.out.println("Value of "+key+" is: "+hm.get(key));

        }

}

ADF: Selectively Required to make partial mandatory in ViewCriteria

ADF: Selectively Required to make partial mandatory in ViewCriteria

ADF : DECODE () -> CheckBox search from ViewCriteria

ADF : DECODE () -> CheckBox search from ViewCriteria


DECODE(a.SEEDED_FLAG,'Y',1,'N',0,0)

ADF : Automatic VA execution when attribute's getter method is called.

ADF : Automatic VA execution when attribute's getter method is called.

ADF : Create Nested AM

Create Nested AM

HistoryDataService AM (Pointing to different DB and in different project)
       | _   CustomerService AM (Pointing to different DB and in different project)

More Info : http://fortunefusionminds.blogspot.in/2013/10/how-to-define-nested-application-module.html

ADF: Autosuggest behaviour for inputComboboxListOfValues component.

ADF: Autosuggest behaviour for inputComboboxListOfValues component.

Please follow the below link to implement Autosuggest for inputComboboxListOfValues.


http://digitalidentitymanagement.blogspot.in/2013/02/implementing-contains-autosuggest.html

ADF: New ViewLink instance to AM

ADF: New ViewLink instance to AM

If we add new viewLink to AM, the backend changes are as follows :

ADF: inputComboboxListOfValues Use

ADF: inputComboboxListOfValues Use

Problem faced in below use case:

Problem : we had Transient attribute in search criteria, and 1st time on click of search button using transient attribute it was not working, after adding any transient attribute from "Add fields" option it was working.

Solution: If you have any transient attribute in search criteria then select "In Memory" option instead of "Database" in ViewCriteria.

JTATransaction: javax.transaction.InvalidTransactionException.

 JTATransaction:  javax.transaction.InvalidTransactionException.

For Weblogic server, for complete domain level we set JTA time out.
If we are facing JTATransaction Time out exceptions, please go and increase the time.
If Application Modules are not commited between this time automatically it will be roll backed and you will get exception.

JAVA : TempFile : How to avoide InputStrem Loss.

TempFile : How to avoide InputStrem Loss.

1. Assume we are getting stream from UCM, and we are going to use that stream in our java code.

If file is huge then we may not handle that stream for long time, It will be lost after some time.

So to avoide that we can get the stream and write it in to tempFile, and then we can use that stream for further coding.

Below is the sample code: