Reg - How to remind previous view state?

Hi,
I have the following requirement:
In mobile application, the home view screen has a text input and button controls. Text input will contain a service URL (value provided at run time), on click of the button, the given URL (specified in text box) will be executed using HTTPService component. The resultant value will be bound to a List component. On select of the list item, next view (details view) will be launched with the selectedItem value. The details view has 'Back' button, on press of back button the home view will be launched. On launch of Home view from the details view i need to maintain the previous state (resultant value) as it is. How can i implement this?
Note: I don't want to allow user to give input and fire a service on each time return back from 'Details view'
I just tried and can able to pass and return the URL value using 'navigator.poppedViewReturnedObject' but it requires need to fire a HTTPservice again on launch of 'Home view' from 'Details view'. How i overcome this? or am i understood wrongly?
Can you help me with your knowledge and experince?
Thanks and Regards,
Manikandan

Hi Mani,
You can use persistence manager.
If I have understood you correct.These two links can help you achive what you want.
http://help.adobe.com/en_US/flex/mobileapps/WSb0a29bf92525419c-54dd253312afbec3ecb-8000.ht ml
http://cookbooks.adobe.com/post_Simple_data_persistence_in_a_Flex_4_5_mobile_appli-18856.h tml
hope this helps
cheers

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 handleFault(error);
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 horizontalAlign="center"
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<?xml version="1.0" encoding="utf-8"?>
<mx:Module
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 layout="absolute"
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 horizontalAlign="center"
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 import mx.events.ListEvent;
 import mx.controls.Alert;
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 import mx.controls.Image;
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 borderColor="#636363"
 backgroundColor="#FCF4DA"
 width="900"
 horizontalCenter="true"
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 columnWidth="260"
 maxColumns="2"
 rowHeight="150"
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 width="520"
 horizontalScrollPolicy="off"
 horizontalCenter="0"
 backgroundAlpha="0.0"
 borderStyle="none"
 creationComplete="mod_init()"
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CompanyTileList component:
<?xml version="1.0" encoding="utf-8"?>
<mx:VBox
 xmlns:mx="http://www.adobe.com/2006/mxml"
 verticalScrollPolicy="off"
 horizontalScrollPolicy="off"
 horizontalCenter="0"
 width="260"
 paddingLeft="5"
 paddingRight="5"
 paddingTop="0"
 paddingBottom="0"
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 <mx:Script>
 <![CDATA[
 import com.brassworks.ValueObjects.CompanyVO;
 import mx.utils.Base64Decoder;
 import flash.utils.ByteArray;
 [Bindable]
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 [Bindable]
 private var _company_logo:ByteArray;
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 public var _company:CompanyVO;
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 _company = data as CompanyVO;
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 _decoder.decode(_company.logo);
 _company_logo = _decoder.toByteArray();
 ]]>
 </mx:Script>
 <mx:Image
 source="{_company_logo}"
 width="250"
 height="100"
 />
 <mx:Label
 text="{_company_name}"
 creationComplete="tile_list_init()"
 width="100%"
 left="0"
 right="0"
 textAlign="center"
 />
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We have web application based on SharePoint. We have a list view to display data based on Search Criteria. We have total of around 16000 data. When we try to export all data to excel it gives an error. The cause of the issue is:
View State is used to save the state of page i.e. the previous state. When the export to excel link is clicked, the data present in the grid is actually saved in view state so that the overhead of again generating
the data(as per the selection criteria) can be avoided. Now, this View state has a limitation of storage of these records. When we put in some selection criteria, the no. of records is less hence no problem in actually storing the view state. But when there
is no selection criteria, 16306 records are too much to be stored in view state. Hence the error occurs.
We tried to solve this issue by creating a compressor class and overriding two methods:
LoadPageStateFromPersistenceMedium
SavePageStateToPersistenceMedium
This has resolved the issue with Export to Excel. However, there is now some issue in the paging of the list view. The list view has a column with hyperlink which opens related data in a form. While we click on the link in 2nd
page of the list view, it displays data for the link in the 1st page at same row.
Please suggest how to resolve this issue or any workaround for this

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Hi,
***** Note I have put my question on Bold to make it easier****
I am trying to Implement this solution on our systems and need help on how to set it up ?
Pasted from
http://technet.microsoft.com/en-us/library/cc281307.aspx?lc=1033
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1.
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Copy Code
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2.
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3.
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4.
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5.
Verify that all Web.Config files in the \Reporting Services\Report Manager folders contain identical <machineKey> elements in the <system.web>
Does the key generate using above generates the key with same element ?
Any help on this would be appreciated .
Thank you !
Thanks

Hi SQL_Help:
Per my understanding that you have some question with the steps descript about "How to Configure View State Validation", you don't know how to generate Validation key and also not clear if all the Web.Config files will add the same
code, right?
We have many method to generate the validation key,details information below for your reference:
Generate either from the machineKey generator utility from
http://aspnetresources.com/tools/keycreator.aspx or your very own utility or from this link: http://www.eggheadcafe.com/articles/GenerateMachineKey/GenerateMachineKey.aspx
We can add some code to generate the key, details steps and sample code in article below for your reference:
How to create keys by using Visual C# .NET for use in Forms authentication
We should add the same code which include the generated key in all the web.config file in each server node.
More Details information you can reference to the rticle below:
https://msdn.microsoft.com/en-us/library/ff649308.aspx
If you still have any problem, please feel free to ask.
Regards,
Vicky Liu
Vicky Liu
TechNet Community Support

SSRS 2008 R2 Problem understanding View State Validation steps

Hi,
Sorry, but I have some problem understanding this steps. Please help me to understand this.
Pasted from
http://technet.microsoft.com/en-us/library/cc281307.aspx?lc=1033
How to Configure View State Validation
To run a scale-out deployment on an NLB cluster, you must configure view state validation so that users can view interactive HTML reports. You must do this for the report server and for Report Manager.
View state validation is controlled by the ASP.NET. By default, view state validation is enabled and uses the identity of the Web service to perform the validation. However, in an NLB cluster scenario, there are multiple service instances
and web service identities that run on different computers. Because the service identity varies for each node, you cannot rely on a single process identity to perform the validation.
To work around this issue, you can generate an arbitrary validation key to support view state validation, and then manually configure each report server node to use the same key. You can use any randomly generated hexadecimal sequence.
The validation algorithm (such as SHA1) determines how long the hexadecimal sequence must be.
Generate a validation key and decryption key by using the autogenerate functionality provided by the .NET Framework.
(Well, how to generate Validation key using .Net Framework?) In the end, you must have a single <machineKey> entry that you can
paste into the Web.config file for each Report Manager instance in the scale-out deployment.
The following example provides an illustration of the value you must obtain. Do not copy the example into your configuration files; the key values are not valid.
Copy Code
<machineKey validationKey="123455555" decryptionKey="678999999" validation="SHA1" decryption="AES"/>
Open the Web.config file for Report Manager, and in the <system.web> section paste the <machineKey> element that you generated. By default, the Report Manager
Web.config file is located in \Program Files\Microsoft SQL Server\MSRS10_50.MSSQLSERVER\Reporting Services\ReportManager\Web.config.
Save the file.
Repeat the previous step for each report server in the scale-out deployment.
(Do I need to repeat all 3 previous steps?)
Verify that all Web.Config files in the \Reporting Services\Report Manager folders contain identical <machineKey> elements in the <system.web> section.
Thanks

Jerry,
Thanks for the reply.
From the above View State Validation Steps,
For 1st step , how to generate validation key using .Net Framework?
for 4th step, Do I need to repeate all 3 previous steps?
Thanks
Kp

Shoudn't Managed Bean be part of view state?

Hello,
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Hello,
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view state? After all it is beans which provide the
data (model) for components in view. Isn't data part
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beans - in fact there are enough reasons to question
why JSF allowed 'request' scope in first place. Request scope is very useful for certain things. I think a "pageScope" is missing, which is why I added it to JSFTemplating (https://jsftemplating.dev.java.net). Request scope is not appropriate for all cases.
1. Choice of request scope saves storage, but
requires the developers to save the bean data in
session and restore that data everytime when the bean
is reconstructed on subsequent POST backs.
2. Failure to store or restore the bean's previous
data results in NullPointerExceptions during
APPLY_REQUEST_VALUES phase, when JSF tries to compare
old values with new submitted values to broadcast
events.
3. This essentially mean beans are required (with old
data) right at the APPLY_REQUEST_VALUES phase, same
as the view state.Both managed beans and the request scope map itself can make this happen transparently.
4. Any storing of data in session creates overhead of
cleaning it without fail. Failure to clean results in
too big session storage affecting performance.I agree.
5. Restoring bean state sometimes also means database
calls as early as APPLY_REQUEST_VALUES phase - which
is not the right phase for such business logic.Depends on how you write your beans / application.
JSF spec should at least provide a way for developers
to configure the bean to be saved in view state.You don't have to use beans let alone use "managed" beans. If you feel your application would be better off storing data w/ the view state... get the UIViewRoot, call setAttribute("key", yourData).
Good luck!
Ken Paulsen
https://jsftemplating.dev.java.net

How to wrap a view in oracle

Does any one know how to wrap a view in Oracle, I know it is not possible, yet. Are there any third party software to wrap the logic in the view.
Thanks,
Sanjay

Your best bet is to write a view that queries the source tables and contains any necessary business logic
CREATE VIEW VBASE AS SELECT A.COLUMN_A FROM TABLE_1 A, TABLE_2 B, TABLE_3 C WHERE A.ID = B.ID AND B.ID = C.ID;
create a view for exposure to the user that queries the base view.
CREATE VIEW VSECURE AS SELECT COLUMN_B FROM VBASE;
and grant privileges to VSECURE.
GRANT SELECT ON VSECURE TO SECURE_USER;
This will allow the user to see, query, and describe VSECURE without seeing the definition for VBASE.
The advantage of the this approach is that the query engine can still push predicates down into the base view to optimize the performance or the query where as this is limited with the pipeline function and can become a tuning headache.
eg.
SQL> -----------------------------------------
SQL> -- create some tables
SQL> -----------------------------------------
SQL> CREATE TABLE table_1(ID NUMBER, MESSAGE VARCHAR2(100))
Table created.
SQL> CREATE TABLE table_2(ID NUMBER, message2 VARCHAR2(100))
Table created.
SQL> CREATE TABLE table_3(ID NUMBER, message3 VARCHAR2(100))
Table created.
SQL> -----------------------------------------
SQL> -- populate tables with some data
SQL> -----------------------------------------
SQL> INSERT INTO table_1
SELECT ROWNUM,
CASE
WHEN MOD ( ROWNUM, 50 ) = 0 THEN 'HELLO there joe'
ELSE 'goodbye joe'
END
FROM DUAL
CONNECT BY LEVEL < 1000000
999999 rows created.
SQL> INSERT INTO table_2
SELECT ROWNUM,
CASE
WHEN MOD ( ROWNUM, 50 ) = 0 THEN 'how are you joe'
ELSE 'good to see you joe'
END
FROM DUAL
CONNECT BY LEVEL < 1000000
999999 rows created.
SQL> INSERT INTO table_3
SELECT ROWNUM,
CASE
WHEN MOD ( ROWNUM, 50 ) = 0 THEN 'just some data'
ELSE 'other stuff'
END
FROM DUAL
CONNECT BY LEVEL < 1000000
999999 rows created.
SQL> -----------------------------------------
SQL> --create base view
SQL> -----------------------------------------
SQL> CREATE OR REPLACE VIEW vbase AS
SELECT a.MESSAGE,
c.message3
FROM table_1 a,
table_2 b,
table_3 c
WHERE a.ID = b.ID
AND b.ID = c.ID
View created.
SQL> -----------------------------------------
SQL> --create secure view using base view
SQL> -----------------------------------------
SQL> CREATE OR REPLACE VIEW vsecure AS
SELECT MESSAGE,
message3
FROM vbase
View created.
SQL> -----------------------------------------
SQL> -- create row type for pipeline function
SQL> -----------------------------------------
SQL> CREATE OR REPLACE TYPE vbase_row
AS OBJECT
message varchar2(100),
message3 varchar2(100)
Type created.
SQL> -----------------------------------------
SQL> -- create table type for pipeline function
SQL> -----------------------------------------
SQL> CREATE OR REPLACE TYPE vbase_table
AS TABLE OF vbase_row;
Type created.
SQL> -----------------------------------------
SQL> -- create package
SQL> -----------------------------------------
SQL> CREATE OR REPLACE PACKAGE pkg_getdata AS
FUNCTION f_get_vbase
RETURN vbase_table PIPELINED;
END;
Package created.
SQL> -----------------------------------------
SQL> -- create package body with pipeline function using same query as vbase
SQL> -----------------------------------------
SQL> CREATE OR REPLACE PACKAGE BODY pkg_getdata AS
FUNCTION f_get_vbase
RETURN vbase_table PIPELINED IS
CURSOR cur IS
SELECT a.MESSAGE,
c.message3
FROM table_1 a,
table_2 b,
table_3 c
WHERE a.ID = b.ID
AND b.ID = c.ID;
BEGIN
FOR rec IN cur
LOOP
PIPE ROW ( vbase_row ( rec.MESSAGE, rec.message3 ) );
END LOOP;
END;
END pkg_getdata;
Package body created.
SQL> -----------------------------------------
SQL> -- create secure view using pipeline function
SQL> -----------------------------------------
SQL> CREATE or replace VIEW vsecure_with_pipe AS
SELECT *
FROM TABLE ( pkg_getdata.f_get_vbase ( ) )
View created.
SQL> -----------------------------------------
SQL> -- this would grant select on the 2 views, one with nested view, one with nested pipeline function
SQL> -----------------------------------------
SQL> GRANT SELECT ON vsecure TO test_user
Grant complete.
SQL> GRANT SELECT ON vsecure_with_pipe TO test_user
Grant complete.
SQL> explain plan for
SELECT *
FROM vsecure
WHERE MESSAGE LIKE 'HELLO%'
Explain complete.
SQL> SELECT *
FROM TABLE ( DBMS_XPLAN.display ( ) )
PLAN_TABLE_OUTPUT
Plan hash value: 3905984671
| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 16939 | 2365K| | 3098 (3)| 00:00:54 |
|* 1 | HASH JOIN | | 16939 | 2365K| 2120K| 3098 (3)| 00:00:54 |
|* 2 | HASH JOIN | | 24103 | 1835K| | 993 (5)| 00:00:18 |
|* 3 | TABLE ACCESS FULL| TABLE_1 | 24102 | 1529K| | 426 (5)| 00:00:08 |
| 4 | TABLE ACCESS FULL| TABLE_2 | 1175K| 14M| | 559 (3)| 00:00:10 |
| 5 | TABLE ACCESS FULL | TABLE_3 | 826K| 51M| | 415 (3)| 00:00:08 |
Predicate Information (identified by operation id):
1 - access("B"."ID"="C"."ID")
2 - access("A"."ID"="B"."ID")
3 - filter("A"."MESSAGE" LIKE 'HELLO%')
Note
PLAN_TABLE_OUTPUT
- dynamic sampling used for this statement
23 rows selected.
SQL> -----------------------------------------
SQL> -- note that the explain plan shows the predicate pushed down into the base view.
SQL> -----------------------------------------
SQL> explain plan for
SELECT count(*)
FROM vsecure_with_pipe
WHERE MESSAGE LIKE 'HELLO%'
Explain complete.
SQL> SELECT *
FROM TABLE ( DBMS_XPLAN.display ( ) )
PLAN_TABLE_OUTPUT
Plan hash value: 19045890
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 2 | 15 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 2 | | |
|* 2 | COLLECTION ITERATOR PICKLER FETCH| F_GET_VBASE | | | | |
Predicate Information (identified by operation id):
2 - filter(VALUE(KOKBF$) LIKE 'HELLO%')
14 rows selected.
SQL> -----------------------------------------
SQL> -- note that the filter is applied on the results of the pipeline function
SQL> -----------------------------------------
SQL> set timing on
SQL> SELECT count(*)
FROM vsecure
WHERE MESSAGE LIKE 'HELLO%'
COUNT(*)
19999
1 row selected.
Elapsed: 00:00:01.42
SQL> SELECT count(*)
FROM vsecure_with_pipe
WHERE MESSAGE LIKE 'HELLO%'
COUNT(*)
19999
1 row selected.
Elapsed: 00:00:04.11
SQL> -----------------------------------------
SQL> -- note the difference in the execution times.
SQL> -----------------------------------------

Reg - How to remind previous view state?

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