Read Only Entity Bean will not cache

I'm using the Sun Java Application Server version 8.2. I've created a read only entity bean with a 900 second refresh. This bean has a findAll() method that I've created. The table it is reading from has only 22 rows of data that doesn't change (well, maybe 2 or 3 times a year).
As stated I've set the read-only property to true and the refresh to 900 seconds. I've also set the caching settings, which I guess i don't really need to mess with from the defaults.
I do not seem to be achieving any caching at all. My check for this is very simple. I simply load a drop down in the client application with these 22 values. After the intial load I add another row in the database. The newley added row always shows up in the drop down in real time. If i'm caching correctly I shouldn't see this value until the refresh time of 900 seconds. Is there something I am missing? I'm using NetBeans 5.0 to set the values of the entity beans and such.
Thanks for the help!
ryan

Hi Ryan,
The 8.2 read-only bean implementation still executes non-findByPrimaryKey queries within the database.
If your application calls findByPrimaryKey or accesses a business method on one of the
read-only beans returned from a query, that will not result in a database access (unless a refresh
period boundary is crossed).
We have added the additional optimization of caching specific result sets of non-findByPrimaryKey
read-only bean finders in the latest development version of Glassfish (V2).
https://glassfish.dev.java.net/public/downloadsindex.html#Official_supported_builds
It will also be available in our Application Server release 9.1. There are no plans to backport this
optimization to the 8.2 codebase.
--ken

Similar Messages

Load balancing not happending but fail over is for Read only Entity beans

          The following are the configuration.
          Two NT servers with WL5.1 sp9 having only EJBs(Read only entity beans)
          One Client with WL5.1 sp9 having servlet/java application as
          EJB client.
          I am trying to make a call like findbyprimarykey in one of the
          entity bean. I could see the request is being directed only to the one of the
          server always. When I bring that server, fail over is happening to the other server.
          Here are the settings I have in the ejb-jar.xml :
                    <entity>
                         <ejb-name>device.StartHome</ejb-name>
                         <home>com.wl.api.device.StartHome</home>
                         <remote>com.wl.api.device.StartRemote</remote>
                         <ejb-class>com.wl.server.device.StartImpl</ejb-class>
                         <persistence-type>Bean</persistence-type>
                         <prim-key-class>java.lang.Long</prim-key-class>
                         <reentrant>False</reentrant>
                         <resource-ref>
                              <res-ref-name>jdbc/wlPool</res-ref-name>
                              <res-type>javax.sql.DataSource</res-type>
                              <res-auth>Container</res-auth>
                         </resource-ref>
                    </entity>
          Here are the settings I have in the weblogic-ejb-jar.xml.
          <weblogic-enterprise-bean>
                    <ejb-name>device.StartHome</ejb-name>
                    <caching-descriptor>
                         <max-beans-in-cache>50</max-beans-in-cache>
                         <cache-strategy>Read-Only</cache-strategy>
                         <read-timeout-seconds>900</read-timeout-seconds>
                    </caching-descriptor>
                    <reference-descriptor>
                         <resource-description>
                              <res-ref-name>jdbc/wlPool</res-ref-name>
                              <jndi-name>weblogic.jdbc.pool.wlPool</jndi-name>
                         </resource-description>
                    </reference-descriptor>
                    <enable-call-by-reference>False</enable-call-by-reference>
                    <jndi-name>device.StartHome</jndi-name>
               </weblogic-enterprise-bean>
          Am I doin any mistake in this?
          Any one's help is appreciated.
          Thanks
          Suresh


we are using 5.1
          "Gene Chuang" <[email protected]> wrote in message
          news:[email protected]...
          > Colocation optimization occurs if your client resides in the same
          container (and also in the same
          > EAR for 6.0) as your ejbs.
          >
          > Gene
          >
          > "Suresh" <[email protected]> wrote in message
          news:[email protected]...
          > > Ok....the ejb-call-by-reference set to true is making the call to one
          server
          > > only. i am not sure why it is. I removed the property name and it
          works.
          > > Also I have one question, in our prduct environment, when i cache the
          ejb
          > > home it is not doing the load balancing. can any one help me for that.
          > > thanks
          > >
          > > Mike,
          > > From the sample pgm I sent, even from single client calls get load
          > > balanced.
          > >
          > > Suresh
          > >
          > >
          > > "Gene Chuang" <[email protected]> wrote in message
          > > news:[email protected]...
          > > > In WL, LoadBalancing will ONLY WORK if you reuse your EJBHome! Take
          your
          > > StartEndPointHome lookup
          > > > out of your for loop and see if this fixes your problem.
          > > >
          > > > I've seen this discussion in ejb-interest, and some other vendor
          (Borland,
          > > I believe it is), brings
          > > > up an interesting point: Clustering and LoadBalance is not in the
          J2EE
          > > specs, hence implementation
          > > > is totally up to the vendor. Weblogic loadbalances from the remote
          > > interfaces (EJBObject, EJBHome,
          > > > etc..), while Borland loadbalances from JNDI Context lookup.
          > > >
          > > > Let me suggest a third implmentation: loadbalance from BOTH Context
          > > lookup as well as stub method
          > > > invocation! Or create a smart replica-aware list manager which
          persists
          > > on the client thread
          > > > (ThreadLocal) and is aware of lookup/evocation history. Hence if I do
          the
          > > following in a client
          > > > hitting a 3 node cluster, I'll still get perfect round-robining
          regardless
          > > of what I do on the
          > > > client side:
          > > >
          > > > InitialContext ctxt = new InitialContext();
          > > > EJBHome myHome = ctxt.lookup(MY_BEAN);
          > > > myHome.findByPrimaryKey(pk); <== hits Node #1
          > > > myHome = ctxt.lookup(MY_BEAN);
          > > > myHome.findByPrimaryKey(pk); <== hits Node #2
          > > > myHome.findByPrimaryKey(pk); <== hits Node #3
          > > > myHome = ctxt.lookup(MY_BEAN);
          > > > myHome.findByPrimaryKey(pk); <== hits Node #1
          > > > ...
          > > >
          > > >
          > > > Gene
          > > >
          > > > "Suresh" <[email protected]> wrote in message
          > > news:[email protected]...
          > > > > Mike ,
          > > > >
          > > > > Do you have any reasons for the total number of machines to be 10.
          > > > >
          > > > > I tried with 7 machines.
          > > > >
          > > > >
          > > > > Here is my sample client java application running individual in the
          > > seven
          > > > > machines.
          > > > >
          > > > > StartEndPointHome =
          > > > > (StartEndPointHome)ctx.lookup("dev.StartEndPointHome");
          > > > > for(;;)
          > > > > {
          > > > > // logMsg(" --in loop "+currentTime);
          > > > > if (currentTime > nextRefereshTime)
          > > > > {
          > > > > logMsg("****- going to call");
          > > > > currentTime=getSystemTime();
          > > > > nextRefereshTime=currentTime+timeInterval;
          > > > > StartEndPointHome =
          > > > > (StartEndPointHome)ctx.lookup("dev.StartEndPointHome");
          > > > > long rndno=(long)(Math.random()*10)+range;
          > > > > logMsg(" going to call remotestub"+rndno);
          > > > > retVal =
          > > > >
          > >
          ((StartEndPointHome)getStartHome()).findByNumber("pe"+rndno+"_mportal_dsk36.
          > > > > mportal.com");
          > > > >
          > > > > logMsg("**++- called stub");
          > > > > }
          > > > >
          > > > >
          > > > >
          > > > > The range value is different for each of the machines in the
          cluster.
          > > > >
          > > > > If the first request starts at srv1, all request starts hitting the
          same
          > > > > server.
          > > > > If the first request starts at srv2, all request starts hitting the
          same
          > > > > server.
          > > > >
          > > > > I have the following for the url , user and pwd values for the
          context
          > > .
          > > > >
          > > > > public static String url="t3://10.11.12.14,10.11.12.117:8000";
          > > > > public static String user="guest";
          > > > > public static String password="guest";
          > > > >
          > > > >
          > > > >
          > > > > It would be great if you could help me.
          > > > >
          > > > > Thanks
          > > > > suresh
          > > > >
          > > > >
          > > > > "Mike Reiche" <[email protected]> wrote in message
          > > > > news:[email protected]...
          > > > > >
          > > > > > If you have only one client don't be surprised if you only hit one
          > > server.
          > > > > Try
          > > > > > running ten different clients and see if the hit the same server.
          > > > > >
          > > > > > Mike
          > > > > >
          > > > > >
          > > > > > "suresh" <[email protected]> wrote:
          > > > > > >
          > > > > > >The following are the configuration.
          > > > > > >
          > > > > > > Two NT servers with WL5.1 sp9 having only EJBs(Read only entity
          > > beans)
          > > > > > >
          > > > > > > One Client with WL5.1 sp9 having servlet/java application as
          > > > > > > EJB client.
          > > > > > >
          > > > > > >
          > > > > > >I am trying to make a call like findbyprimarykey in one of the
          > > > > > >entity bean. I could see the request is being directed only to
          the
          > > one
          > > > > > >of the
          > > > > > >server always. When I bring that server, fail over is happening
          to
          > > the
          > > > > > >other server.
          > > > > > >
          > > > > > >
          > > > > > >Here are the settings I have in the ejb-jar.xml :
          > > > > > > <entity>
          > > > > > > <ejb-name>device.StartHome</ejb-name>
          > > > > > > <home>com.wl.api.device.StartHome</home>
          > > > > > > <remote>com.wl.api.device.StartRemote</remote>
          > > > > > > <ejb-class>com.wl.server.device.StartImpl</ejb-class>
          > > > > > > <persistence-type>Bean</persistence-type>
          > > > > > > <prim-key-class>java.lang.Long</prim-key-class>
          > > > > > > <reentrant>False</reentrant>
          > > > > > > <resource-ref>
          > > > > > > <res-ref-name>jdbc/wlPool</res-ref-name>
          > > > > > > <res-type>javax.sql.DataSource</res-type>
          > > > > > > <res-auth>Container</res-auth>
          > > > > > > </resource-ref>
          > > > > > > </entity>
          > > > > > >
          > > > > > >
          > > > > > >Here are the settings I have in the weblogic-ejb-jar.xml.
          > > > > > >
          > > > > > ><weblogic-enterprise-bean>
          > > > > > > <ejb-name>device.StartHome</ejb-name>
          > > > > > >
          > > > > > > <caching-descriptor>
          > > > > > > <max-beans-in-cache>50</max-beans-in-cache>
          > > > > > > <cache-strategy>Read-Only</cache-strategy>
          > > > > > > <read-timeout-seconds>900</read-timeout-seconds>
          > > > > > > </caching-descriptor>
          > > > > > >
          > > > > > > <reference-descriptor>
          > > > > > > <resource-description>
          > > > > > > <res-ref-name>jdbc/wlPool</res-ref-name>
          > > > > > > <jndi-name>weblogic.jdbc.pool.wlPool</jndi-name>
          > > > > > > </resource-description>
          > > > > > > </reference-descriptor>
          > > > > > > <enable-call-by-reference>False</enable-call-by-reference>
          > > > > > > <jndi-name>device.StartHome</jndi-name>
          > > > > > > </weblogic-enterprise-bean>
          > > > > > >
          > > > > > >
          > > > > > >Am I doin any mistake in this?
          > > > > > >
          > > > > > >Any one's help is appreciated.
          > > > > > >Thanks
          > > > > > >Suresh
          > > > > >
          > > > >
          > > > >
          > > >
          > > >
          > >
          > >
          >
          >

Problem with Read-Only Entity Bean

Hi All,
I have an Read-Only BMP that just read data from 20 tables and stores them in a Collection. In a 'Read-Only' Entity bean, the ejbLoad() is supposed to called periodically as defined by 'read-timeout-seconds' parameter in 'weblogic-ejb-jar.xml'. But this doesn't happen. Every time I invoke the EJB, ejbCreate() and ejbLoad() get called. Any suggestions will be highly appreciated.
Here is the content of my 'weblogic-ejb-jar.xml' file.
<?xml version="1.0"?>
<!DOCTYPE weblogic-ejb-jar PUBLIC
'-//BEA Systems, Inc.//DTD WebLogic 6.0.0 EJB//EN'
'http://www.bea.com/servers/wls600/dtd/weblogic-ejb-jar.dtd'>
<weblogic-ejb-jar>
<weblogic-enterprise-bean>
<ejb-name>beanManaged</ejb-name>
     <entity-descriptor>
          <entity-cache>
               <max-beans-in-cache>1</max-beans-in-cache>
               <read-timeout-seconds>5</read-timeout-seconds>
               <concurrency-strategy>ReadOnly</concurrency-strategy>
          </entity-cache>
     </entity-descriptor>
<jndi-name>beanManaged</jndi-name>
</weblogic-enterprise-bean>
</weblogic-ejb-jar>
Thanks,
Prem

Yes, it calls ejbLoad() at intervals defined by read-timeout-seconds, but only when bean
is requested by the client, and the cached copy is old. If bean just sits in the cache
unused no ejbLoad()'s will be called.
Prem Raghupathy <[email protected]> wrote:
The weblogic document on 'Setting Entity EJBs to Read-Only' says "WebLogic Server
never calls ejbStore() for a read-only entity EJB. ejbLoad() is called initially
when the EJB is created; afterwards, WebLogic Server calls ejbLoad() only at intervals
defined by the read-timeout-seconds deployment parameter.". Here is the link to
the document
http://edocs.bea.com/wls/docs61/ejb/EJB_environment.html#1074846
Dimitri Rakitine <[email protected]> wrote:
WebLogic doesn't reload Read-Only entity beans periodically. It loads
bean instance only when client requests it, and instance is not in the
cache, or cached instance is older than read-timeout-seconds.
Prem Raghupathy <[email protected]> wrote:
This is a multi-part message in MIME format.
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Content-Type: text/plain
Content-Transfer-Encoding: 7bit
Rajesh,
Thanks for your reply. I’m using WL6.1 sp1. When I log the methodcalls,
this is what I see on the server console.
SetEntityContext()
ejbCreate()
ejbPostCreate()
ejbLoad()
As you see, the ejbLoad() doesn’t get called every 5 sec, eventhough I
set the ‘read-timeout-seconds=5’ in the weblogic-ejb-jar.xml,
Do you have a working example for Read-Only BMP on WL6.1? The examplesdirectory
in weblogic 6.1 doesn’t have one.
Also find attached all the files. Any suggestions will be highly appreciated.
Thanks,
Prem.
Rajesh Mirchandani <[email protected]> wrote:
What version of the Server and Service pack are you using? Turn on
JDBC
logging and see if every ejbLoad() hits the DB.
prem wrote:
Hi All,
I have an Read-Only BMP that just read data from 20 tables and storesthem in a Collection. In a 'Read-Only' Entity bean, the ejbLoad() is
supposed to called periodically as defined by 'read-timeout-seconds'
parameter in 'weblogic-ejb-jar.xml'. But this doesn't happen. Every
time I invoke the EJB, ejbCreate() and ejbLoad() get called. Any suggestions
will be highly appreciated.
Here is the content of my 'weblogic-ejb-jar.xml' file.
<?xml version="1.0"?>
<!DOCTYPE weblogic-ejb-jar PUBLIC
'-//BEA Systems, Inc.//DTD WebLogic 6.0.0 EJB//EN'
'http://www.bea.com/servers/wls600/dtd/weblogic-ejb-jar.dtd'>
<weblogic-ejb-jar>
<weblogic-enterprise-bean>
<ejb-name>beanManaged</ejb-name>
<entity-descriptor>
<entity-cache>
<max-beans-in-cache>1</max-beans-in-cache>
<read-timeout-seconds>5</read-timeout-seconds>
<concurrency-strategy>ReadOnly</concurrency-strategy>
</entity-cache>
</entity-descriptor>
<jndi-name>beanManaged</jndi-name>
</weblogic-enterprise-bean>
</weblogic-ejb-jar>
Thanks,
Prem--
Rajesh Mirchandani
Developer Relations Engineer
BEA Support
---=_newsgroups3c21148f
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---=_newsgroups3c21148f----
Dimitri
Dimitri

Read Only entity beans and Finders

Hi,
We are using Read Only entity beans with WLS 7.0 SP1 for some entities that represent Reference Data that will never change. What I would like to know is whether WLS needs to hit the database when a finder on these beans is run or does WLS cache the results of the Finder also?
Thanks.
Santosh

Hi,
we use read only entity beans. It is beneficial if have findByPrimaryKey finders. but we also have finders on non primary key coloumn also. is there a way to cache such local references returned by such non primary key finders also.

Primary Key for Read Only Entity Beans In EJB 3.0

Hi,
I have checked the spec for ejb 3.0 which mentions that, there is no common standard for the vendor to implement the Read only Entity Beans.
My question over here is how it is implemented in OC4J??
Do we need to specify a primary key attribute in the read-only entity bean?
w.r.t BC4J(ADF) i remember, we used to create a read-only View Object with out specifying a primary key.
Just want to check is that the way it works in EJB 3.0 (Implemented by OC4J).
Thanks for your help in advance.
Shiva

Hi,
Try using the JBoss embedded container:
http://docs.codehaus.org/display/MAVENUSER/How+to+use+the+JBoss+Embedded+EJB3+Container+for+Unit+testing
/klejs

Re: Read Only Entity Bean

I am trying to convert an entity bean into a read only bean .
I am not sure how it works ? I read the documentation and it said that I had to
set
the following parameters
cache-strategy>Read-Write</cache-strategy>
read-timeout-seconds>100</read-timeout-seconds>
If I set the time out time to 100 seconds will the container call the ejbLoad
method
to reload the bean after every 100 seconds or only when the a request is made
on the
bean
Thanks a lot in advance for your answers.

Kevin,
"Kevin" <[email protected]> wrote in message
news:3ec25923$[email protected]..
I am trying to convert an entity bean into a read only bean .
I am not sure how it works ? I read the documentation and it said that Ihad to
set
the following parameters
cache-strategy>Read-Write</cache-strategy>
read-timeout-seconds>100</read-timeout-seconds>
If I set the time out time to 100 seconds will the container call theejbLoad
method
to reload the bean after every 100 seconds or only when the a request ismade
on the
bean
Thanks a lot in advance for your answers.read-timeout-seconds make sense only for Read-Only
cache strategy and defines cache element expiration time.
For Read-Write strategy data will be loaded from the database
in with every new transaction (if db-is-shared set to true).
Hope this helps.
Regards,
Slava Imeshev

Read only entity beans

Is there any way to mark an entity bean as read only? I'm using glassfish V2.

JPA does not define a read-only concept, but TopLink Essentials (glassfish v2 persistence) does. You can use a DescriptorCustomizer to set your TopLink Descriptor to be read-only (descriptor.setReadOnly()).
TopLink 11g, and EclipseLink (Glassfish v3) also provider a query hint for returning read-only objects at the query level ("eclipselink.return-shared").
-- James : EclipseLink

Rad-only Entity beans are replicated?

Hi. I have just read the document "Failover and Replication in a cluster": http://edocs.bea.com/wls/docs81/cluster/failover.html#1008850
I have no clear if read-only entity beans are replicated?
I understand that replica-aware stub does not mean that stub objects are replicated in all the servers of the cluster. This seems to be only for statefull session beans.
Thx.

Hi,
we use read only entity beans. It is beneficial if have findByPrimaryKey finders. but we also have finders on non primary key coloumn also. is there a way to cache such local references returned by such non primary key finders also.

Help reg. read only CMP bean in the examples!!

Hi,
I have been working with examples of EJB in WLS 6.1
I used the Access database with CMP.
The basic entity beans, both CMP and BMP worked well.
However when I tried the read-only Stock Bean and write StockWriter Beans... I received the following error... I am not sure what does it say...
==============================================
Beginning readMostly.Client...
Creating a StockWriter for BEAS
There was an exception while creating and using the Beans.
This indicates that there was a problem communicating with the server: java.rmi.RemoteException: EJB Exception:; nested exception is:
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver]Optional feature not implemented
Start server side stack trace:
java.rmi.RemoteException: EJB Exception:; nested exception is:
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver]Optional feature not implemented
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver]Optional feature not implemented
at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6026)
at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:6183)
at sun.jdbc.odbc.JdbcOdbc.SQLBindInParameterFloat(JdbcOdbc.java:852)
at sun.jdbc.odbc.JdbcOdbcPreparedStatement.setLong(JdbcOdbcPreparedStatement.java:575)
at weblogic.jdbc.pool.Statement.setLong(Statement.java:369)
at weblogic.jdbc.rmi.internal.PreparedStatementImpl.setLong(PreparedStatementImpl.java:114)
at weblogic.jdbc.rmi.SerialPreparedStatement.setLong(SerialPreparedStatement.java:147)
at ejb.readMostly.StockWriterBean_u4qwd5__WebLogic_CMP_RDBMS.__WL_create(StockWriterBean_u4qwd5__WebLogic_CMP_RDBMS.java:589)
at ejb.readMostly.StockWriterBean_u4qwd5__WebLogic_CMP_RDBMS.ejbCreate(StockWriterBean_u4qwd5__WebLogic_CMP_RDBMS.java:518)
at java.lang.reflect.Method.invoke(Native Method)
at weblogic.ejb20.manager.DBManager.create(DBManager.java:519)
at weblogic.ejb20.manager.DBManager.remoteCreate(DBManager.java:489)
at weblogic.ejb20.internal.EntityEJBHome.create(EntityEJBHome.java:190)
at ejb.readMostly.StockWriterBean_u4qwd5_HomeImpl.create(StockWriterBean_u4qwd5_HomeImpl.java:78)
at ejb.readMostly.StockWriterBean_u4qwd5_HomeImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:305)
at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:93)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:274)
at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:22)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
End server side stack trace
; nested exception is:
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver]Optional feature not implemented
Start server side stack trace:
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver]Optional feature not implemented
at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6026)
at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:6183)
at sun.jdbc.odbc.JdbcOdbc.SQLBindInParameterFloat(JdbcOdbc.java:852)
at sun.jdbc.odbc.JdbcOdbcPreparedStatement.setLong(JdbcOdbcPreparedStatement.java:575)
at weblogic.jdbc.pool.Statement.setLong(Statement.java:369)
at weblogic.jdbc.rmi.internal.PreparedStatementImpl.setLong(PreparedStatementImpl.java:114)
at weblogic.jdbc.rmi.SerialPreparedStatement.setLong(SerialPreparedStatement.java:147)
at ejb.readMostly.StockWriterBean_u4qwd5__WebLogic_CMP_RDBMS.__WL_create(StockWriterBean_u4qwd5__WebLogic_CMP_RDBMS.java:589)
at ejb.readMostly.StockWriterBean_u4qwd5__WebLogic_CMP_RDBMS.ejbCreate(StockWriterBean_u4qwd5__WebLogic_CMP_RDBMS.java:518)
at java.lang.reflect.Method.invoke(Native Method)
at weblogic.ejb20.manager.DBManager.create(DBManager.java:519)
at weblogic.ejb20.manager.DBManager.remoteCreate(DBManager.java:489)
at weblogic.ejb20.internal.EntityEJBHome.create(EntityEJBHome.java:190)
at ejb.readMostly.StockWriterBean_u4qwd5_HomeImpl.create(StockWriterBean_u4qwd5_HomeImpl.java:78)
at ejb.readMostly.StockWriterBean_u4qwd5_HomeImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:305)
at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:93)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:274)
at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:22)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
End server side stack trace
End readMostly.Client...
==========================================
please help
SP
[att1.html]

<entity-cache>
          <max-beans-in-cache>...</max-beans-in-cache>
          <read-timeout-seconds>...</read-timeout-seconds>
          <concurrency-strategy>ReadOnly</concurrency-strategy>
          </entity-cache>
          I believe this is what you are looking for and this is part of entity-descriptor.
          -- Prasad
          Aruna wrote:
          > Hi
          > I am trying to develop few entity beans which is for only reading the
          > data from the data base, As Read only entity beans are treated like stateless
          > session beans(ie lead balancing at method calls as well auto failover) in the
          > cluster. I want to know how to specify an entity bean as read only entity bean???
          > ie in deployment descriptor so that ejb container treats it as a read only entity
          > bean.
          >
          > Any help on this highly appreciated
          >
          > Thanks and Regards
          > Aruna

Session bean calling read-only entiti bean

I have a session bean that is calling a read-only entity bean. I gets the remote
reference to the bean ok but when I call a method on the entity bean it locks.
After 5 minutes the call executes but then the session bean times out. Is there
any special setting I need to do this? I set both transaction attributes to Required.
Thanks,
Tim

5.1
Seth White <[email protected]> wrote:
>
Hi.
What release are you using?
Seth
Tim wrote:
I have a session bean that is calling a read-only entity bean. I getsthe remote
reference to the bean ok but when I call a method on the entity beanit locks.
After 5 minutes the call executes but then the session bean timesout. Is there
any special setting I need to do this? I set both transaction attributesto Required.
Thanks,
Tim

Clustering read-write entity beans

          reading the WLS 6.1 documentation, it's unclear to me whether read-write entity
          bean
          method calls load-balancing and failover are supported. here's an excerpt from
          "Understanding Object Clustering":
          "When a home finds or creates a read-write entity bean, it obtains an instance
          on
          the local server and returns a stub pinned to that server. Load balancing and
          failover occur only at the home level."
          but here's what i find under "The WebLogic Server EJB Container":
          "read-write entity EJBs supports automatic failover on a safe exception,
          if home-is-clusterable is set to true. For example, failover is automatically
          supported if there is a failure after a method completes, or if the method
          fails to connect to a server."
          anyone know which is true?
          yan


In WLS 6.1, there is fail-over for entity beans in a cluster. The stub contains a
          special load-balancing algorithm that returns to your original server until it
          fails. Then it will fail-over to a new server. If a server fails during a
          method-call, automatic fail-over only happens on a safe exception. Basically, when
          WLS determines that you have not actually connected to the failed server and have
          not done any work in the current transaction.
          -- Rob
          Yan wrote:
          > reading the WLS 6.1 documentation, it's unclear to me whether read-write entity
          > bean
          > method calls load-balancing and failover are supported. here's an excerpt from
          > "Understanding Object Clustering":
          >
          > "When a home finds or creates a read-write entity bean, it obtains an instance
          > on
          > the local server and returns a stub pinned to that server. Load balancing and
          > failover occur only at the home level."
          >
          > but here's what i find under "The WebLogic Server EJB Container":
          >
          > "read-write entity EJBs supports automatic failover on a safe exception,
          > if home-is-clusterable is set to true. For example, failover is automatically
          > supported if there is a failure after a method completes, or if the method
          >
          > fails to connect to a server."
          >
          > anyone know which is true?
          >
          > yan
          AVAILABLE NOW!: Building J2EE Applications & BEA WebLogic Server
          by Michael Girdley, Rob Woollen, and Sandra Emerson
          http://learnWebLogic.com
          [att1.html]

Adobe Acrobat Reader 8 Pdf files will not open normally

This applies to all Pdf files.
Double click or right click>click "open."
Receive: Adobe Acrobat Reader is required to view the file. Would you like to install Adobe Acrobat Reader now?
I had Adobe Reader 9. Experienced problem described above. Uninstalled and installed version 8. Same problem.
I have three computers with only one with this problem. PC Windows XP SP3.
Please advise.
Robert.

I have opened: https://courses.worldcampus.psu.edu/public/diagnostics/Acrobat.html I click on test page and it downloads Acro_Test.pdf 5..8kb -- psu.edu,then I open the page, the hour glass comes on and goes off without ever opening. The Reader software in my program file.
Don't keep sending the same message. it does'nt work
Paul
From: kglad
To: ps walker
Sent: Monday, April 08, 2013 2:43 PM
Subject: Adobe Acrobat Reader x11.0.02 will not open
Re: Adobe Acrobat Reader x11.0.02 will not open
created by kglad in Downloading, Installing, Setting Up - View the full discussion

Set sharing on system to read only now computer wlll not boot up

set sharing on system to read only now computer wlll not boot up

Hello skiboat2,
Because the permissions have been changed, you will need to put them back to what they were before. One of the ways to do that is to reinstall your OS X to make sure that everything permission wise gets put back to what it needs to be to work properly. Based of to the operating system that you say you have, I have provided the steps for reinstalling Snow Leopard. When doing this, it does not overwrite your personal data; it only touches the operating system.
Mac OS X 10.6: Reinstalling Mac OS X
http://support.apple.com/kb/PH6606
Regards,
-Norm G.

HT4085 Only my email will not rotate, all other applications rotate as expected. How do I fix this?

Only my email will not rotate, all other applications rotate as expected. How do I fix this? This is a recent development for no apparent reason, my email appears to be locked from rotating, all other aspects of my email still work.

Quit the mail app completely and restart the iPad. Go to the home screen first by tapping the home button. Double tap the home button and the task bar will appear with all of your recent/open apps displayed at the bottom. Tap and hold down on any app icon until it begins to wiggle. Tap the minus sign in the upper left corner of the app that you want to close. Tap the home button or anywhere above the task bar. Restart the iPad.
Restart the iPad by holding down on the sleep button until the red slider appears and then slide to shut off. To power up hold the sleep button until the Apple logo appears and let go of the button.
It that doesn't work - try this .... Reset the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons.

HT4623 ios 7 download on iphone 4 stuck at rescue email. Can only go back, will not go on to the next page.

Please help! ios 7 download on iphone 4 stuck at rescue email. Can only go back, will not go on to the next page.

That makes no sense . Can you take a screenshot and show me? hold home button and power for about 2 sec then on computer import the photo (http://support.apple.com/kb/ht4083) and upload it here. Have you restarted the iphone yet?

Read Only Entity Bean will not cache

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