J2ME and database connectivity

We are currently looking at ways to connect a pda to a server on a local Intranet. I have been told that the J2ME Wireless Toolkit does not include JDBC for database connectivity (I have not verified this). Does anybody have any ideas?

yeah, of course you have to send the sql statement to the servlet. The servlet then connects to the DB, exeutes the statement and puts the result in some format, you can transfer to the phone since you cant serialize the java.sql.ResultSet directly. Maybe you would transform this to a String, each field delimited by a special character, each row delimited by another. make sure these characters wont appear in the fields ;-)
The more correct way would be creating some XML structure from the DB result and transfer this but this can get very large and XML processing on mobiles is not recommended for large XML information.
hth
Kay

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Performance with MySQL and Database connectivity toolbox

Hi!
I'm having quite some problems with the performance of MySQL and Database connectivity toolbox. However, I'm very happy with the ease of using database connectivity toolbox. The background is:
I have 61 variables (ints and floats) which I would like to save in the MySQL-database. This is no problem, however, the loop time increases from 8ms to 50ms when using the database. I have concluded that it has to do with the DB Tools Insert Data.vi and I think that I have some kind of performance issue with this VI. The CPU never reach more the 15% of its maximum performance. I use a default setup and connect through ODBC.
My questions are:
1. I would like to save 61 variables each 8-10ms, is this impossible using this solution?
2. Is there any way of increasing the performance of the DB Tools Insert Data.vi or use any other VI?
3. Is there any way of adjusting the MySQL setup to achieve better performance?
Thank you very much for your time.
Regards,
Mattias

First of all, thank you very much for your time. All of you have been really good support to me.
>> Is your database on a different computer? Does your loop execute 61 times?
Database is on the same computer as the MySQL server.
The loop saves 61 values at once to the database, in one SQL-statement.
I have now added the front panel and block diagram for my test-VI. I have implemented the queue system and separate loops for producer and consumer. However, since the queue is building up faster then the consumer loop consumes values, the queue is building up quite fast and the disc starts working.
The test database table that I add data to is created by a simple:
create table test(aa int, bb char(15));
...I'm sure that this can be improved in some way.
I always open and close the connection to the database "outside the loop". However, it still takes some 40-50 ms to save the data to the database table - so, unfortunatly no progress to far. I currently just want to save the data.
Any more advise will be gratefully accepted.
Regards,
Mattias
Message Edited by mattias@hv on 10-23-2007 07:50 AM
Attachments:
front panel 2.JPG ‏101 KB
block diagram.JPG ‏135 KB

I run Dev 6i on Windows 2008 R2 64-bit,the forms are working fine after connection to the database but the reports continue to request for username, password and database connection string every time i try to open a report.

I receive REP-0501: Unable to connect to specified database. I run developer 6i application on windows 2008 r2. I have applied the nn60.dll and nnb60.dll files to the \BIN directory. The forms are working fine. The reports will only display after the correct user id (username, password and database connection string) is supplied. This is happening to all attempts to open already complied form. Pls, help.

If you are connecting to an Oracle 11g database, remember that by default the passwords are case sensitive. To disable that, run
ALTER SYSTEM SET SEC_CASE_SENSITIVE_LOGON = FALSE;

Enabling Usage Rights for Web Service and Database connectivity

We are looking for code that allows us to enable web service and database connectivity rights into a form. We are using LiveCycle Forms 7.2 to render the XDP and merge data. Because we are merging data into the form, it has to be reader enabled through the code everytime it is presented to the user in our application.
usageRights[0] = com.adobe.document.pdf.DOCUMENT_SAVE.value;
usageRights[1] = com.adobe.document.pdf.FORM_FILL_IN.value;
usageRights[2] = com.adobe.document.pdf.FORM_EXPORT.value;
usageRights[3] = com.adobe.document.pdf.FORM_IMPORT.value;
usageRights[4] = com.adobe.document.pdf.FORM_ONLINE.value;
Anyone's help would be greatly appreciated

This topic was cross posted. See responses here:
http://forums.adobe.com/message/2111421#2111421

(IMP)Application module and database connection

Hi,
How application module pooling and database connection pooling is working ?
Currently i m facing a problem like if i am creating 10 browser session then it doesn't mean that i'll have only 10 db sessions. While closing the browser session of application module time out respective db session is not removed.
In this case, invalid db session are created in bulk which is crashing database sometime. We have writter script to kill those session periodically but in this case if application module is accessing such dbconnection then we are getting session killed error or not logged in error.
To over come we need to bounce the server (middle tier).
Is there any proper way to solve this or am i doing something wrong ?
Please let me know if you need any more details.
Thanks in advance
Devang

Thanks for your prompt reply Ricky.
I just found out that in some of the JSP pages in application
<jbo:ReleasePageResources/> is not written. Should this problem arise because of this?
could you please tell me how can I release page resources in UIX pages ?
Datasources.xml file content
<data-source class="com.evermind.sql.DriverManagerDataSource"
name="AITDS"
location="jdbc/AITCoreDS"
pooled-location="jdbc/pooled/AITPDS"
xa-location="jdbc/xa/AITXADS"
ejb-location="jdbc/AITDS"
connection-driver="oracle.jdbc.driver.OracleDriver"
username=<USERNAME>
password=<PASSWORD>
url=<URL>
inactivity-timeout="30"
/>
bc4j.xcfg file
<BC4JConfig>
<AppModuleConfigBag>
<AppModuleConfig name="GsaServerModuleLocal">
<DeployPlatform>LOCAL</DeployPlatform>
<JDBCDataSource>jdbc/AITCoreDS</JDBCDataSource>
<jbo.project>gsa</jbo.project>
<AppModuleJndiName>oracle.appsit.gsa.server.GsaServerModule</AppModuleJndiName>
<java.naming.factory.initial>oracle.jbo.common.JboInitialContextFactory</java.naming.factory.initial>
<ApplicationName>oracle.appsit.gsa.server.GsaServerModule</ApplicationName>
</AppModuleConfig>
</AppModuleConfigBag>
</BC4JConfig>
Let me know if you need any more detail.
Thanks in advance
Devang

How to use sql request with Jdev and database connection

Hello,
I have a login page with simple username and password inputsecret text and a button validate! I would like, when the user click on the validate button, to check in the database that the user and password matches. I've done the "Method BIndind..." with the commandButton_action and the database connection works fine.
How can I use an already existing procedure, say authenticate, wich is stored in the database to authenticate my user ?
Do I have to create a jdbc connection in java even if I've done the connection with the "create new database connection" wizard ?
String s1 = "jdbc:oracle:thin:@address:1521:ORCL";
System.out.println( "Connecting with: " );
System.out.println( s1 );
DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
this.conn = DriverManager.getConnection( s1,"user","pass");
thanks for your help

Creating a connection to the DB in JDeveloper doesn't mean that your application is now connected to the DB - so yes you do need to create a connection to the database using JDBC.
One note - if you are trying to do a database user authentication the following is probably the better way to go about it:
http://www.oracle.com/technology/products/jdev/howtos/1013/oc4jjaas/oc4j_jaas_login_module.htm

Oracle 64-bit and database connectivity toolkit

Hello- I am attempting to connect to an Oracle database by interfacing the databse connectivity toolkit with the Oracle 10.2.0.3 64-bit that my customer uses. I am running LV13 32-bit on their machine. I am unable to connect to the database. Are there any known issues with this type of setup?

There's some discussion about an unsupported method to use the Database Connectivity Toolkit with 64-bit Windows here: http://forums.ni.com/t5/LabVIEW-Idea-Exchange/64-bit-Database-Toolkit/idi-p/2170088
That may help with the problem you're seeing. Something else to consider is the manual (page 1-2):
The Microsoft ODBC driver for Oracle and the Microsoft OLE DB
Provider for Oracle do not support BLOB (binary) data types. You
cannot use Oracle with the Database Connectivity Toolkit for binary
data with these drivers. Instead, use the OLE DB Provider and ODBC
driver that Oracle provides. Refer to the Oracle Web site at
www.oracle.com for more information about the OLE DB Provider
and the ODBC driver that Oracle provides
Jeff B.
Applications Engineer
National Instruments

LabView 5.1 and Database Connectivity Toolkit Compatibility?

I am looking to serve some data from a LabView 5.1 application up to an Oracle 8i database. I have looked at the current Database Connectivity Toolkit (which uses ADO technology), but am not sure if this will be compatible with LabView 5.1... is it? If not, what are my alternatives? Are older versions of this toolkit available?
Thanks!

Also, could someone touch on how forward compatible LabView applications are? In this scenario, I have the same 5.1 application which now requires some database connectivity. Since the SQL Toolkit is no longer supported, I would be left with upgrading LabView to 7.0 and using the Database Connectivity Toolkit. How well (in general) do earlier LabView applications convert to newer versions?
Thanks again!

OLE Objects and Database Connectivity Toolkit

I am trying to insert and image (jpg) that is created in Labview into an Access database as an OLE object. How do I go about making this conversion, or are there any other suggestions?

Hello -
Have you tried any of the shipping examples for the database connectivity tookit? You can find them by navigating Help >> Find Examples >> Toolsets and Modules >> Database Connectivity. The Insert Example.vi may help you get started. Click here to access database examples posted on the Developer Zone.
Please let me know if any of these examples helped. If not, can you provide more information about the version of LabVIEW and Access you are using? Thanks! Have a great day!
Becky B.
Applications Engineer
National Instruments
Becky Linton
National Instruments
Field Engineer
Office: 734-464-2463
Cell: 248-709-2822
Email: [email protected]

AIR application and database connectivity (using JAVA)

Hi
I am creating AIR application and I want to connect with the database using java database connectivity (JDBC).
Can any body give me the some suggestion on how to how to do that.
Please give me any reference for creating AIR application for database connectivity with mysql/access.
Thanks
Sameer

lots of serching on the google and found that For AIR applications either you use Webservices(JAVA/PHP/.Net) or you can use SQLLite.
Not found any method for direct connectivity with the database using JDBC.
If any one found direct connecivity withe database using JAVA then please reply.
Thanks

Jsp and database connection using bean

* I want create a bean to handle database connectivity.The
          <jsp:usebean> tag uses
          no argument constructor ..so I cannot pass the userid and password to
          the constructor.
          So how can I create a database connection when the user_id and password
          will be a part of parameter ?
          * Now I'm opening database connection in the jsp scriplets. Everytime I
          refresh the
          jsp page a new connection is created ? Is it not going to choke the
          database ? I cannot use connection pool because every user logs in with
          different userid.
          Thanks


You can pass your arguments in this way:
          <jsp:usebean id="myBean" scope="page"/>
          <jsp:setProperty name="myBean" property="userId", value=<%= user_id%>/>
          <jsp:setProperty name="myBean" property="password", value=<%=
          user_password%>/>
          of course, in your bean class, you should create two setter methods,
          setUserId and setPassword.
          Hopefully, this will help you.
          sonia WEN
          Chiranjib Misra wrote:
          > * I want create a bean to handle database connectivity.The
          > <jsp:usebean> tag uses
          > no argument constructor ..so I cannot pass the userid and password to
          > the constructor.
          > So how can I create a database connection when the user_id and password
          > will be a part of parameter ?
          >
          > * Now I'm opening database connection in the jsp scriplets. Everytime I
          > refresh the
          > jsp page a new connection is created ? Is it not going to choke the
          > database ? I cannot use connection pool because every user logs in with
          > different userid.
          >
          > Thanks

Oc4j and database connections issue (way too many created)

I seem to be experiencing a serious issue every time someone connects to my application. New connections are made to the database instead of using existing connections (i.e. pooling doesn't seem to work). In my data-sources.xml, the pools are set to have a max-connections of 3, yet when I query the v$sessions view, there are additional sessions created every time the application is hit which has sent it way over the max-connections parameter in the data-sources.xml file. If oc4j is pooling the connections how can this happen? Is there any way of tracking where this is occurring or what could be causing this? (SQLNET.EXPIRE_TIME has been set, database is 10g, oc4j is 101202 and oc4j on linux platform)
Thanks
Paul

Paul,
According to the documentation for OC4J 10.1.2, if you use the value of the "ejb-location" attribute (from the "data-sources.xml" file) when doing a JNDI lookup of your datasource, then you should be using connection pooling.
It's probably also an idea to not define a "pooled-location" attribute in your "data-sources.xml" file.
Also, you can get database connection information via the "Spy" [Web] application. Use the following URL:
http://oc4jHost:oc4jPort/dmsoc4j/Spy
Of-course you need to replace "oc4jHost" and "oc4jPort" with the appropriate values. For example if you open your Web browser on the same machine that OC4J is running on, and if you are using the default port, then the URL will be:
http://localhost:8888/dmsoc4j/Spy
Good Luck,
Avi.

File connection and database connection as a parameter

hi
i am using ssis 2012, now i want all my connection ,database and file connection as a parameter.
how to do it

Hi coool_sweet,
If I understand correctly, you want to use a parameter to control the connection string of flat file or database.
If in this scenario, we can add two parameters in the package with appropriate values, like the connection string of flat file and the connection string of database. Then use an expression with the parameter value to control the ConnectionString property
of Flat File Connection Manager and the ConnectionString property of OLE DB Connection Manger. The following screenshot is for your reference:
Besides, as Arthur said above, if you want to change the ConnectionString property of Flat File Connection Manager and the ConnectionString property of OLE DB Connection Manger via changing parameter values after deploying the package to SSISDB, there is no
need to do this. Because we can also change the connection manager properties in the Configure dialog box as below:
Thanks,
Katherine Xiong
Katherine Xiong
TechNet Community Support

Query regarding Singletons and Database connection pool

Hi there,
I am trying to understand the Singleton pattern in relation to a pool of database connections.
Frankly,I have not fully understood this.
If my pool of database connections is set to 10, how can a singleton design come into this?
In what way is this beneficial?
Please can someone explain this?
No offence meant

bhuru_luthria wrote:
Hi there,
I am trying to understand the Singleton pattern in relation to a pool of database connections.They are related like a hiccup is related to a wiffle ball.

Crystal reports and vb6.0 and database connectivity

Hello,
We have installed crystal report 2008 trial version in our system and after installation we are unable to view the crystal report component ocx crystl32.ocx and add the same into a vb form and create a connectivity between access database.
Please help on the above query.
Mobile:+91 9880553553.
Thanks,
Ram.

Hello Ram,
The OCX (Crystl32.ocx) was retired after CR8.5. It will not work with CR2008 reports. Additionally, there are no other COM components that ship with CR2008 to work with VB6.
With CR2008 you'll have to migrate to use Visual Studios and the Crystal Reports .NET SDK.
You can search on the Crystal Reports .NET forum for additional information on getting started with VS.NET and Crystal Reports 2008.
Sincerely,
Dan Kelleher

J2ME and database connectivity

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