Batch Updates with Toplink/JPA

Hi All,
I am new to JPA/Toplink and I wonder is there a way that we can do the batch updates/insertions using the JPA? If yes please help me how to do it?
My requirement is this, I need to fetch the n number of records from database and compare with the records from a file and insert/update/delete as required.
I don't wanted to do it one by one record but as a batch. Is there a way that I can do batch updates/inserts/deletes?
Any suggestion would be appreciated.
Thank you.

Hello,
I'm not sure how you are going to do the comparison as a batch and not record by record. A JPA query will give you objects back which you can use to compare and make changes to as neccessary. When you commit, the JPA provider will commit those changes to the database for you. TopLink/EclipseLink has options to efficiently comit those changes, even combining them into batches where possible. See http://wiki.eclipse.org/Optimizing_the_EclipseLink_Application_(ELUG)#How_to_Use_Batch_Writing_for_Optimization for details on using batch writing in EclipseLink.
Best Regards,
Chris

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hi JavaCrazyLover
u got why u getting the error i ma getting similar error its running fine in 8.1 but in web9.1 it is giving errors in some jsp pages may be due to versions or name spacing ie we write in top of the page DTD schema am not sure but i think , there is no jars to add on as such web 9.1 is upgraded one and it supports all files some where there will be conflicts between versions example JDK 1.5and 1.4 enum is a keyword in 9.1 but in normal in 8.1 if u get the solution for this error please mail me to [email protected]
rgds
Mohammed Mansoor

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null

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BEA Support
"frank" <[email protected]> wrote in message
news:3f01921a$[email protected]..
>
I'm using JRockit 7.0 sp2rp1
"frank" <[email protected]> wrote:
I'm trying to use a batch update with a PreparedStatement, but when my
code executes
I receive an error stating The JDBC 2.0 method is not implemented, when
the code
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there
is a Weblogic specific class that will accomplish this, but I would
rather
not
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>
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Oracle Coherence Version 3.4.2/411
Grid Edition: Development mode
Copyright (c) 2000-2009 Oracle. All rights reserved.
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null
Eventhough the method is called correctly, it does not return the value. Is there any other setup that has to be done?
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Hi Raji,
You mentioned:
>
-Dtangosol.coherence.cacheconfig=D:/JDEV_11g/jdeveloper/jdev/mywork/CoherenceApp/CoherenceProject/src/META-INF/coherence-cache-config.xml
>
and
>
Persistence.xml and coherence-cache-config.xml are palced inside the jar file.
>
It appears that these are conflicting; as the system property indicates that the config should be read from a file, whereas the file is actually deployed in a jar.
That being said, I would suggest double checking that the system property is actually being set in the JVM. In my testing, if I specify a cache config that does not exist, an exception will be thrown:
java -Dtangosol.coherence.cacheconfig=foo.xml com.tangosol.net.CacheFactory
Oracle Coherence Version 3.4.2/411p3
Grid Edition: Development mode
Copyright (c) 2000-2009 Oracle. All rights reserved.
Map (?): cache test
2009-04-22 15:33:15.310/6.917 Oracle Coherence GE 3.4.2/411p3 <Error> (thread=main, member=1):
(Wrapped: Failed to load the factory) java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
        at com.tangosol.util.ClassHelper.newInstance(ClassHelper.java:662)
        at com.tangosol.net.CacheFactory.getConfigurableCacheFactory(CacheFactory.java:602)
        at com.tangosol.coherence.component.application.console.Coherence.doCache(Coherence.CDB:9)
        at com.tangosol.coherence.component.application.console.Coherence.processCommand(Coherence.CDB:209)
        at com.tangosol.coherence.component.application.console.Coherence.run(Coherence.CDB:39)
        at com.tangosol.coherence.component.application.console.Coherence.main(Coherence.CDB:3)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at com.tangosol.net.CacheFactory.main(CacheFactory.java:1308)
Caused by: (Wrapped: Failed to load configuration resource: foo.xml) java.io.IOException: Configuration is missing: "foo.xml", loader=null
        at com.tangosol.net.DefaultConfigurableCacheFactory.loadConfigAsResource(DefaultConfigurableCacheFactory.java:386)
        at com.tangosol.net.DefaultConfigurableCacheFactory.loadConfig(DefaultConfigurableCacheFactory.java:337)
        at com.tangosol.net.DefaultConfigurableCacheFactory.loadConfig(DefaultConfigurableCacheFactory.java:309)
        at com.tangosol.net.DefaultConfigurableCacheFactory.<init>(DefaultConfigurableCacheFactory.java:137)
        ... 15 moreThanks,
Patrick

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