How do i use Connection pool in JSP pages

Hey everyone,
I am using a connection pool in my web application. I am using DbConnectionBroker from Javaexchange.com. It has a class that creates a connection pool available for the servlets. I am trying to figure out that how to use connection pool within the JSP pages if I want to connect to the database. In the servlets i am using DBConnectionBroker pool = (DbConnectionBroker) getServletContext().getAttribute("dbPool") to get database connection. How Can i use this in JSP page to get a db connection.
Thanks

If the reference to the connection pool is already stored as an ServletContex attribute, try:
<jsp:useBean id="dbPool" scope="application" class="com.javaexchange.dbConnectionBroker" />
<%
Connection con = dbPool.getConnection();
%>

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How to use connection pooling in jsp?

I'm new to world of JSP. I'm developing web application using Oracle 8i and JSP to implement it. I'm using jakarta-tomcat server for this purpose.
I'll frequently access the database. so I want to use the connection pooling.
Can anybody explain the simple procedure to use it
thanx

Hello syyuen,
Please help me, here iam sending u my server.xml , web.xml and servlet
application. I put classes12.jar in tomcat/common/lib. and above servlet
class application under tomcat/webapps/root/web-inf/classes
and this is a simple servlet program for getting connection from the
connection pool of tomcat using tyrex..
my oracle database name is "myuser" and password is "mypass"
either u check my server.xml or tell me where under which tag should i
place <Resource...> tag in server.xml and should i need to modify any
other places..??
server.xml
<Server port="8005" shutdown="SHUTDOWN" debug="0">
          
<Service name="Tomcat-Standalone">
     
<Connector className="org.apache.catalina.connector.http.HttpConnector"
port="8080" minProcessors="5" maxProcessors="75"
enableLookups="true" redirectPort="8443"
acceptCount="10" debug="0" connectionTimeout="60000"/>
          
<Connector className="org.apache.ajp.tomcat4.Ajp13Connector"
port="8009" minProcessors="5" maxProcessors="75"
acceptCount="10" debug="0"/>
          
<Engine name="Standalone" defaultHost="localhost" debug="0">
     
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="catalina_log." suffix=".txt"
timestamp="true"/>
     
               
               
<Realm className="org.apache.catalina.realm.JDBCRealm" debug="99"
          driverName="oracle.jdbc.driver.OracleDriver"
               connectionURL="jdbc:oracle:thin:@oracle:1521:ORCL"
connectionName = "mail"
connectionPassword = "mail"
          userTable="users" userNameCol="user_name" userCredCol="user_pass"
               userRoleTable="user_roles" roleNameCol="role_name" />
                    
               
<Host name="localhost" debug="1" appBase="webapps" unpackWARs="true">
     <Valve className="org.apache.catalina.valves.AccessLogValve"
     directory="logs" prefix="localhost_access_log." suffix=".txt"
     pattern="common"/>
<Logger className="org.apache.catalina.logger.FileLogger"
directory="logs" prefix="localhost_log." suffix=".txt"
     timestamp="true"/>
               
               
               
<Context path="/manager" docBase="manager" debug="0" privileged="true"/>

     <Context path="/localhost" docBase="localhost" debug="0" reloadable="false" override="true">
          <Resource name="jdbc/myConnection" auth="SERVLET" type="javax.sql.DataSource"/>
          <ResourceParams name="jdbc/myConnection">
               <parameter><name>user</name><value>myuser</value></parameter>
               <parameter><name>password</name><value>mypass</value></parameter>
               <parameter><name>driverClassName</name><value>oracle.jdbc.driver.OracleDriver</value></parameter>
               <parameter>
                    <name>url</name>
                    <value>jdbc:oracle:thin:@oracle:1521:ORCL</value>
               </parameter>
               <parameter>
                    <name>maxActive</name>
                    <value>32</value>
               </parameter>
               <parameter>
                    <name>maxIdle</name>
                    <value>10</value>
               </parameter>
          </ResourceParams>




</Context>
</Host>
</Engine>
</Service>
     
<Service name="Tomcat-Apache">
<Connector className="org.apache.catalina.connector.warp.WarpConnector"
port="8008" minProcessors="5" maxProcessors="75"
enableLookups="true" appBase="webapps"
acceptCount="10" debug="0"/>
               
<Engine className="org.apache.catalina.connector.warp.WarpEngine"
name="Apache" debug="0">
               
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="apache_log." suffix=".txt"
timestamp="true"/>
               
<Realm className="org.apache.catalina.realm.MemoryRealm" />
</Engine>
</Service>
</Server>
web.xml
<web-app>
<servlet>
<servlet-name>conServlet</servlet-name>
<servlet-class>conServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>conServlet</servlet-name>
<url-pattern> /conServlet </url-pattern>
</servlet-mapping>
<resource-ref>
<description> Resource reference to java.sql.Connection
factory defined in server.xml
</description>
<res-ref-name>jdbc/myConnection</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
servlet application
DataSource ds = (DataSource) new InitialContext().lookup("java:comp/env/jdbc/myConnection");
conn = ds.getConnection();
out.println("conn : " + conn);

How to use connection pool in jsp/servlet ?

I found I can "lookup" it in either java beans/servlets/JSP using JNDI. why?
what is the best practice to use it in a jsp/servlet web app considering JNDI lookuping expensive?
Thanks!
Bo
Edited by: BobXu on Nov 17, 2008 2:27 PM
Edited by: BobXu on Nov 17, 2008 2:32 PM

Huh?
You can lookup a JNDI resource from anywhere in java code you want to. As long as you have a repository set up to search on :-)
Of course whether that resource is available or not is a different matter. If you let the server set up the JNDI resource for you, then you can't run it standalone outside the server without something else setting the same thing up :-)
So its not so much a limitation of beans, but just the environment you run the code in.
Best practice? Don't write sql queries in JSP pages :-)
For the rest you might consider the DAO pattern. Or ignore SQL altogether and let hibernate do the work there for you.
Cheers,
evnafets

How can i use connection pool within the sqlj?

hello
i am a beginner to sqlj,i find all of the sample code from the oracle DON'T use connectionpool,they only write the database url to "connection.properties" file,but i think in the production environment we should use the connectionpool to optimise the querying,i usually use the weblogic connection pool.
how can i use the connection pool within the sqlj?
thank you very much!

Im not sure if I understand. :)
English is not my best language...
Looking up the connection again? Do you mean I have to create new DataSource object and bind it again to ServletContext?

How to use connection pools in jsp

hi
i am new to jsp
i want to connect to database from my jsp
i did it with using java.sql.DriverManager
now how can i modify that with a connection pool

Search the forum. This is answered several times in the past.

How to access database from applet using connection pooling.

Hi,
I am using tomcat 4.1, JRE 1.4.2_10, MySQL 5.0, and IE 6.0. I can access the database using connection pooling from JSP without problems. But, if I try to acess from the applet, I get the following exception (related to JNDI.):
javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.lookup(Unknown Source)
I know what this acception means, but I don't know how to fix it. I set up connection pooling in my Tomcat 4.1 that talks to MySQL 5.0. As I said, when I access from jsp, JNDI works. But, applet complains. Please help. In my applet, the following code accesses the database:
ArrayList toolTipData =
      access.getToolTipData (projectName,interfac);This is the snipet of my Access class:
public ArrayList getToolTipData (String projectName, String interfac) {
    System.out.println("In getToolTipData");
    ArrayList toolTipData = new ArrayList();
   try{
    Context ctx = new InitialContext();
    if(ctx == null )
        throw new Exception("No Context");
    DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/interfacesDB");
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      Connection conn = ds.getConnection();
      if(conn != null) {
          Statement s = conn.createStatement();
          //For some reason paramtized queries don't work, so I am forced
          //to this in slighly less eficient way.
          ResultSet rst = s.executeQuery("select * from interfaces");
          while (rst.next()) {
             if (rst.getString("Project_Name").equals(projectName) &&
                 rst.getString("Interface").equals(interfac)) {
               System.out.println("getToolTipData: ITG #" + rst.getString("ITG"));
               toolTipData.add("ITG #: " + rst.getString("ITG"));
               toolTipData.add("SPNE Prime Name: " +
                               rst.getString("SPNE_Prime_Name"));
               toolTipData.add("PD Prime Name: " +
                               rst.getString("PD_Prime_Name"));
               toolTipData.add("IT Prime Name: " +
                               rst.getString("IT_Prime_Name"));
               toolTipData.add("MLC Priority: " +
                               rst.getString("MLC_Priority"));
               toolTipData.add("Gary's Prime: " + rst.getString("Garys_Prime"));
               toolTipData.add("QA Prime: " + rst.getString("QA_Prime"));
               toolTipData.add("Brief Description: " +
                               rst.getString("Brief_Description"));
               toolTipData.add("Project_Status: " +
                               rst.getString("Project_Status"));
          conn.close();
}catch(Exception e) {
    e.printStackTrace();
return toolTipData;
....

The jsp runs on the server, whereas the applet runs on the client so
you must package with your applet any jndi implementation specific classes
and
Properties props = new Properties();
props.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory" );
props.setProperty("java.naming.provider.url", "url:1099");
Context ctx = new InitialContext(props);
Object ref = ctx.lookup("...");

How to create a connection pooling in Netbeans 6.0 using the oracle driver

hi all,
I am using Netbeans 6.0. Apache Tomcat 6.0.14 server, oracle 9i.
I tried to create a connection pooling using tomcat web server.
I have included the following code in context.xml and web.xml.
CONTEXT.XML:
<?xml version="1.0" encoding="UTF-8"?>
<Context path="/network1">
<Resource name="jdbc/myoracle"
auth="Container"
type="javax.sql.DataSource"
username="scott"
password="tiger"
factory="BasicDataSourceFactory"
driverClassName="oracle.jdbc.OracleDriver"
url="jdbc:odbc:thin:@127.0.0.1:1521:mydb"
maxActive="20"
maxIdle="10"
maxwait="-1"/>
</Context>
WEB.XML:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
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<session-timeout>
30
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<welcome-file-list>
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</welcome-file-list>
<resource-ref>
<description>Oracle Datasource example</description>
<res-ref-name>jdbc/myoracle</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
After that i have included the following JDBC driver's jar files in the $Catalina_Home/lib folder.
classes 111.jar,
classes 111_g.jar
classes12.jar
classes 12_g.jar
classes12dms.jar
classes12dms_g.jar
nls_charset11.jar
nls_charset12.jar
ocrs12.jar
ojdbc14.jar
ojdbc14_g.jar
Then i stop the tomcat web server and start it again.
In jsp page i have included the following code:
Context ctx=new InitialContext();
Context envctx=(Context)ctx.lookup("java:comp:env");
DataSource ds=(DataSource)envctx.lookup("jdbc/myoracle");
Connection con=ds.getConnection(); ----->(In this line an error occured that Connection class cannot be found.)
please help me how to create a connection pooling and rectify the error in conneciton.
Thanks in advance

Please refer
http://www.netbeans.org/kb/60/web/customer-book.html

How to setup and use connection pool in Web AS 7.0?

Hello SDN!
I'm developing a Web Dynpro Java application on SAP Web AS 7.0 My app using a couple of DAO classes as model instead of EJBs. These classes perform direct requests to database using JDBC drivers.
I've read that many of web-servers use their own connection pools. So I want to know:
1) how I can setup connection pool in SAP Web AS ?
2) how I can call this pool in my application?
Could you please give me some examples?
Regards, Lev.

hi lev,
check this document for jco pools
http://www.winfobase.de/lehre/lv_materialien.nsf/intern01/FB09D79A41930E34C125709F0046180C/$FILE/Tips&Tricks_JCo_Programming.pdf
ravindra

How to use Connection Pool in ADF ear file creaion from jDev 10.1.3

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We are developing big application in ADF with 10 different modules. We are creating ear file with data source setting.
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Thanks

User,
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How to dynamically validate users at run time using connection pools ?

Hi Folks
We are facing a peculiar situation . We have established connection to our
oracle 8i database using Oracle Thin driver using conenction pooling at the weblogic
server . We set up connection pools at the console to set up connections to thge
oracle 8i database. However the user name and password is always static when
we create the connection pool at the console .
How do i dynamically validate other users using the same connection pool ??
Eg - The connection pool at design time in the console uses user A and password
- passA . Now at run time lets say I prompt the user for a login screen and want
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props.put("connectionPoolID", "Oracle_Thin_Driver_Pool");
props.put("user" , userId );
props.put("password",userPass);
myDriver = (Driver) Class.forName("weblogic.jdbc.pool.Driver").newInstance();
conn = myDriver.connect("jdbc:weblogic:pool", props);
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console while creating the connection pool . So how i get the connection pool
to validate my current userid and password entered through the login screen ??
Thanks in advance
Keith

Hey Bob.
So I assume you're -completely- working with built executables? You're not going to work in the editor environment to modify your projects at all?
If this is the case, then having a generic deployment phase at the beginning of the executable (with a "setting up hardware for your app" splash screen) isn't a bad idea -
Check the binary on the target, ensure it matches the binary you have on the host machine (in case you ever decide to update).
If they don't match, FTP the new file down to replace the old one.
FTP the ni-rt.ini file, ensure the startup exe is enabled and is pointing to the correct location.
If it's not enabled or not pointing to the correct startup file, modify the .INI file and FTP back to the target.
If you had to update the INI file, ask target to reboot itself. Wait 30 seconds, and wait for target to become available again.
Connect to the target. If you cannot connect, reboot target. If the target comes back and you still cannot connect to the app, notify user.
That's almost exactly how we handle installation and deployment via MAX.
The big assumption here is that the built executables were all built with the same version of LabVIEW Real-Time. If not, you'd need a system replication step in there to make sure the proper version of LabVIEW is on the target before launching the built .rtexe.
-Danny

How to use connection pool of datasource to make applications run faster?

Hi, erveryone
I prepare to implement a servlet that access database and do sync with client.
When I access database, I would like to configure a datasource in weblogic and use connection pool.
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<The Java EE 6Tutorial> introduce some simple intruduction about connection pool.

1. Use WebLogic Servers Data Source for Database Connections.
2. Open and close the connections where you need it. Dont open it in begin and close in finalise. That is bad practice.
3. Even when you invoke Connection.close () webLogic will not close the connection. it will commit the transaction and return it back to the pool rather than physically closing the DB connection.
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How To Use Connection Pooling in Struts.

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using these packages how can i implement the connection pooling for my web application. If Anybody have some idea plz contect me.
If Somebody have sample code plz send.
Thks in Advance,

Read the documentation...?

How To Use Connection pooling with j2sdkee1.3?

hi!
How to use javax.sql.ConnectionPoolDataSource and
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javax.sql.ConnectionPoolDataSource is not available.
Please Help me to use Connection pooling.
Dhaya.

Vendor implementations usually have a fair amount of optimization. For J2EE apps, my concern would be using your pool in transactional calls. When you make a transactional call across several beans/methods, the vendor's pool makes sure that you get the same connection each time you get a connection from the pool so that if you want to rollback the work (in case an error occurs), you can. Does your current connection pool support this?

How to check if Connection Pooling is used in our application

We have an ASP.NET application designed by developer team.
All the files are .aspx
They are all hosted in an Windows IIS and connect to Oracle database.
I was reading some forums where people are suggesting to use "connection pooling" for better database performance.
Now is there anyway I can check in code of the .aspx files to see if our team is using connection pooling method or not.

Connection pooling is on by default. The easiest way to check is to check the connect string. If "pooling=false" is there, it's been turned off. If "pooling=true" is specified, or if it's not specified at all, it's on.
Hope it helps,
Greg

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Hello there!
I have a WS and i use ibatis to talk iwth a Oracle DB, but i have a requirement to use connection pool by wls and i dont where should i do this to my application.
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private static void initDb() throws IOException, SQLException {
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<sqlMapConfig>
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          maxTransactions="32"/>
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Can u give me an advice to set the connection pool please?
Thanx in advance!
Edited by: mgaldames on 02-jun-2010 10:54

According to a google hit, it looks like you should be able to do something like this:
http://www.j2eegeek.com/blog/2005/01/31/ibatis-where-have-you-been-all-my-life/
First, configure a datasource in the wls console, the example uses:
jdbc/jpetstoreDS
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sqlMapConfig PUBLIC "-//iBATIS.com//DTD SQL Map Config 2.0//EN" "http://www.ibatis.com/dtd/sql-map-config-2.dtd"?>
<sqlmapconfig>
<settings cacheModelsEnabled="false" enhancementEnabled=" true" lazyLoadingEnabled="true"
maxRequests="32" maxSessions="100" maxTransactions="100" useStatementNamespaces="false"/>
<transactionmanager type="JDBC">
<datasource type="JNDI">
<property name="context.java.naming.factory.initial" value="weblogic.jndi.WLInitialContextFactory"/>
<property name="context.java.naming.provider.url" value="t3://localhost:7001"/>
<property name="DataSource" value="jdbc/jpetstoreDS"/>
</datasource>
</transactionmanager>
<sqlmap resource="com/j2eegeek/ibatis/dao/maps/Account.xml"/>
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How do i use Connection pool in JSP pages

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