How to organise cache structure in distributed and fault tolerant way?

Suppose I have two caches - cacheA that contains objects of type A and cacheB containing objects of type B; caches are distributed across several physical servers.
B-objects should listen to updates of objects in cacheA.
How should the objects be implemented? In particular - how to organize subscription? For example, if in JVM1 I create Object B and subscribe to ObjectA, then launch JVM2 in the same cluster, then shut down JVM1, ObjectB will be available in CacheB on JVM 2 but will not receive any updates about ObjectA anymore.
How can this problem be solved?

That does not answer my question unfortunately. Let's say that I have something that listens to all updates to all objects in the cache that is distributed across several physical servers. The requirements are
- whenever an object in the cache is changed the change is handled somehow
- the code that handles the update should have read/write access to the cache
- there must be one and only one notification of that kind
- network traffic is minimized, i.e. there is no single dedicated JVM that listens to all updates, ideally each node in a cluster serves updates for its local data
I'm thinking about setting up a listener to backing map, but not so sure

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UOO sequencing along with WLS high availability cluster and fault tolerance

Hi WebLogic gurus.
My customer is currently using the following Oracle products to integrate Siebel Order Mgmt to Oracle BRM:
* WebLogic Server 10.3.1
* Oracle OSB 11g
They use path service feature of a WebLogic clustered environment.
They have configured EAI to use the UOO(Unit Of Order) Weblogic 10.3.1 feature to preserve the natural order of subsequent modifications on the same entity.
They are going to apply UOO to a distributed queue for high availability.
They have the following questions:
1) When during the processing of messages having the same UOO, the end point becomes unavailable, and another node is available in order to migrate, there is a chance the UOO messages exist in the failed endpoint.
2) During the migration of the initial endpoint, are these messages persisted?
By persisted we mean that when other messages arrive with the same UOO in the migrated endpoint this migrated resource contains also the messages that existed before the migration?
3) During the migration of endpoints is the client receiving error messages or not?
I've found an entry on the WLS cluster documentation regarding fault tolerance of such solution.
Special Considerations For Targeting a Path Service
When the path service for a cluster is targeted to a migratable target, as a best practice, the path
service and its custom store should be the only users of that migratable target.
When a path service is targeted to a migratable target its provides enhanced storage of message
unit-of-order (UOO) information for JMS distributed destinations, since the UOO information
will be based on the entire migratable target instead of being based only on the server instance
hosting the distributed destinations member.
Do you have any feedback to that?
My customer is worry about loosing UOO sequencing during migration of endpoints !!
best regards & thanks,
Marco

First, if using a distributed queue the Forward Delay attribute controls the number of seconds WebLogic JMS will wait before trying to forward the messages. By default, the value is set to −1, which means that forwarding is disabled. Setting a Forward Delay is incompatible with strictly ordered message processing, including the Unit-of-Order feature.
When using unit-of-order with distributed destinations, you should always send the messages to the distributed destination rather than to one of its members. If you are not careful, sending messages directly to a member destination may result in messages for the same unit-of-order going to more than one member destination and cause you to lose your message ordering.
When unit-of-order messages are processed, they will be processed in strict order. While the current unit-of-order message is being processed by a message consumer, the next message in the unit-of-order will not be delivered unless it is to the same transaction or session. If no message associated with a particular unit-of-order is processing, then a message associated with that unit-of-order may go to any session that’s consuming from the message’s destination. This guarantees that all messages will be processed one at a time and in order, and any rollback or recover will not prevent ordered processing of the messages.
The path service uses a persistent store to save the state of which member destination a particular unit-of-order is currently using. When a Path Service receives the first message for a particular unit-of-order bound for a distributed destination, it uses the normal JMS load balancing heuristics to select which member destination will handle the unit and writes that information into its persistent store. The Path Service ensures that a new UOO, or an old UOO that has no messages currently on any destination, can be enqueued anywhere in the cluster. Adding and removing member destinations will not disrupt any existing unit-of-order because the routing decision is made dynamically and those decisions are persistent.
If the Path Service is unavailable, any requests to create new units-of-order will throw the JMSOrderException until the Path Service is available. Information about existing units-of-order are cached in the connection factory and destination servers so the Path Service availability typically will not prevent existing unit-of-order messages from being sent or processed.
Hope this helps.

Load balancing and fault tolerance in BPEL PM

BPEL documentation talks about the ability of clustering processes in BPEL PM Server for fault tolerance and Load balancing. Can anybody tell me how is it done?
Thanks

Have you seen these links?
http://www.oracle.com/technology/products/ias/hi_av/BPEL_HA_Paper.pdf
http://download-uk.oracle.com/docs/cd/B31017_01/integrate.1013/b28980/clusteringsoa.htm#CHDCGIEJ

How to implement hierarchical structure of managers and reportees using jdeveloper adf

I want to display hierarchical structure(which can be expanded and compressed) with 3 columns(Employeeid, fist Name,lastname) of managers and his reportees on selecting a top level manager.
In this i'm going to use programmatic view objects.
I have employees table.
Here is my detailed requirement:
On selecting a user from drop down list, i want to display the list of users reporting to him.
From the displayed list on selecting a manager, list of users reporting to him has to be displayed in a tree format with the correspoding just being listed below the current selected manager
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Output(a table as mentioned below):
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Will be waiting for the inputs.
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Obviously, you can only display one picture. So then the question becomes which picture to show. Therefore, you will have to create some sort of preference of one pattern over another.
I would use a FOR loop so that you can loop through your available patters and their possible results. Use the Conditional Terminal on the FOR loop so that you can stop the loop on the first match. Then you just wire up the selected value for the ring outside of the loop.
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Dual ADSL Load Balancing and Fault tolerance

Just wonder if this is doable with for example 2 WIC-1ADSL cards on say a 2800 series platform. The application would be simple internet access. If so could someone provide a sample config? Just a note...this application would include two static ip ADSL services. Thanks, Shawn

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ip cef
interface atm1/0.32
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oam-pvc manage
interface atm2/0.32
ip address 255.255.255.252
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oam-pvc manage
interface GigabitEthernet0/0
ip address 10.1.1.1 255.255.255.0
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ip nat inside source route-map ISP1-map interface atm1/0.32
ip nat inside source route-map ISP2-map interface atm2/0.32
route-map ISP11-map permit 10
match interface atm1/0.32
route-map ISP12-map permit 10
match interface atm2/0.32
Explanation:
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- the NAT config will dynamically choose the NAT'ed address depending on which interface CEF has chosen to send the packet out of...
Hope that helps - pls rate the post if it does.
Regards,
Paresh

NonBlocking invoke and fault tolerance behavior

If I have an operation of a partnerlink being invoked synchronously, and I am utilizing the nonBlockingInvoke for that invocation, what is the expected behavior if my server goes down during that synchronous call before the web service can return (more specifically, I have initiated the nonBlocking invocation, see that invocation in the audit trail, then the server goes down before the synchrounous response comes back to the bpel process)?
Will that process instance perform that synchronous invocation again? Or does something else happen?
Thx...
Cheers,
-Dustin

Hi Veeru
I had checked that link. My question was basically to know where should I include ora-terminate action in Fault policy file to make this work.
If you see my fault policy file I am calling aia-ora-java incase of retryFailureAction so that it can send out the error notification email once the retry limit is exceeded.
<Action id="ora-retry">
<retry>
<retryCount>3</retryCount>
<retryInterval>2</retryInterval>
<exponentialBackoff/>
<retryFailureAction ref="aia-ora-java"/>
</retry>
</Action>
Also under aia-ora-java the defaultAction is ora-rethrow-fault so that once the error email has been sent by oracle.apps.aia.core.eh.CompositeJavaAction class, it will rethrow the fault back to the BPEL.
<Action id="aia-ora-java">
<javaAction className="oracle.apps.aia.core.eh.CompositeJavaAction" defaultAction="ora-rethrow-fault">
<returnValue value="REPLAY" ref="ora-terminate"/>
<returnValue value="RETHROW" ref="ora-rethrow-fault"/>
<returnValue value="ABORT" ref="ora-terminate"/>
<returnValue value="RETRY" ref="aia-ora-retry"/>
<returnValue value="MANUAL" ref="ora-human-intervention"/>
</javaAction>
</Action>
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Regards
Subhankar

How can I prevent a PDF file from being copied, printed or downloaded? Students should only be able to view the text and and not distribute it in any way.

How can I prevent a PDF file from being copied, printed or downloaded? Students should only be able to view the text and and not distribute it in any way.

You can prevent it from being printed by applying a security policy to it
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How to retreive data from a table and a structure

Hi experts,
I have a requirement to create an ALV report. I have to include fields from two tables 'PA0001' and 'CATSDB' and from one structure 'CATSAPPR'. I am able to retrieve data from tables using INNERJOIN. But i have no idea how to deal with Structure.
I know that structure does not contain any data.
But i am not able to find any transparent table which has field 'ORDERTEXT' . I found field 'ORDERTEXT' only in structure 'CATSAPPR'.
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Please help me,
Thanks in advance
Anu

check this
Table-Fields                     Short descriptn
AUFK- KTEXT          Order master data
COCH- KTXT              Process Management: Control Recipe Header
COCHP- KTXT             PI sheet: Control Recipe Header
COMPHDR- KTEXT    OCM: Comparison results, indiv. records for order headers
HIKO- KTEXT              Order master data history
MAAVC_MDO- KTEXT      MPO: Individual Master Data for Orders
MCHPVS- AUFTEXT                           Batch Record: Shadow Table for Link to Archive
OCMHOMO_ARCH- KFELD          Backup Table of Homogeneity List in Case of Archiving
PSJHIEDATA- KTEXT                       Hierarchy data to test LDB PSJ
TEWOCODEST- DESCRIPTION                      Order Codes (Texts)
TEWOCODET- KTEXT           Allocation of Message Codes to Order
VLCSMORDER- KTEXT                                                   VELO : Service Order
VSAUFK_CN- KTEXT               Version: Order master data
Yogesh N

How to define the Structure and FCC parameters for EDI file format.

Hi All,
I have a EDI file(FTP)-->XI-->IDOC
the source file content is as follows
PR H01PHUPS
FH   SHP 0.0.5
H1   S0022323
W6   7752508853                     D
PT   1Z58R7070341111111
PT   1Z58R7070342222222
PT   1Z58R7070353333333
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N3ST 8827 D OLD
N4ST MARCY
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N3WH 401 QUALITY
N4WH HARRIS
DTENT20111206
DTSHP201112061754
N9LL BN20700033333333
N9NT
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IT026
P1GD    VN A1111
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QTORD000000000000010CA
QTSHP000000000000010CA
AM U 000000000000000000M
AM X 000000000000000000
LTLT 1112811111
AM G 000000000000000000
AM N 000000000000000000
AM TAX000000000000000000
AM SVC000000000000000000
AM COD000000000000000000
ST   00000000100000000010000000000000000000000000008500LB
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The first two characters in each record is constant , so this would be the keyfields right?
ex:- PR,FH,H1,W6,PT,AM,N1,N3,N4......
In Comm channel the FCC parameters
i need to go for fieldFixedLengths?
Thanks&Regards
Sai_SHA

Hi.
if you need to convert an EDI to XML you need to use an Adapter specific (e.g Seeburger) because PI doesn't support EDI files.
Also if you use a FCC , this configuration is for two level Header and Detail.
Check this.
http://help.sap.com/saphelp_nw04/helpdata/en/bc/bb79d6061007419a081e58cbeaaf28/frameset.htm
Regards
Luis Ortiz

How to copy a dir structure with files and subdir's in to another dir

Hi there.
How can i copy a dir structure with files and subdirs to another dir structure
ie., all files and dirs in side the dir c:\aDir to c:\copyDir so i should get like c:\copyDir\aDir(all the files and subdirs of adir here)
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Muthu

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[email protected]

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Settings > Safari > Clear Cache/Cookies

How to organise cache structure in distributed and fault tolerant way?

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