How to use connection pooling in portlet?

RE: How to use connection pooling in portlet?

2013-05-20T11:28:23Z

Thanks this is what I was looking for.
But there is a problem, Whenever I deploy my code the {my-portlet}/META-INF/context.xml is blank after deployment, with just the following code in it

<context antiJARLocking="true" antiResourceLocking="true" />

becoz of which i get nullPointerexception because there is no entry.

If I replace this file manually in the server, then it works fine.

RE: How to use connection pooling in portlet?

2013-05-17T15:07:24Z

Priyanka Dhingra:

Thanks for the link..
but it will be great if someone can share a solution that can do connection pooling using ext-spring.xml

Are you using the approach mentioned in here?: http://www.liferay.com/web/sten.martinez/blog/-/blogs/using-a-legacy-db-with-service-builder

If yes, then you should have a jndi name for your "legacy db" in ext-spring.xml similar to this:


<bean id="trainingDataSourceTarget" class="com.liferay.portal.spring.jndi.JndiObjectFactoryBean" lazy-init="true">
    <property name="jndiName">
        <value>jdbc/legacyDB</value>
    </property>
</bean>

And in ${your.portlet.name}/docroot/META-INF/context.xml, you can define your jndiName. When you define your jndi name you will be configuring your connection pool:


<context antijarlocking="true" antiresourcelocking="true">
    <resource name="jdbc/legacyDB" auth="Container" type="javax.sql.DataSource" maxActive="100" maxIdle="30" maxWait="10000" username="" password="" driverClassName="net.sourceforge.jtds.jdbc.Driver" url="jdbc:jtds:sqlserver://servername/databasename;domain=domainname" />
</context>

Don't forget, in your ${your.portlet.name}/docroot/WEB-INF/web.xml, you need to reference your jndiName:


<resource-ref>
    <res-ref-name>jdbc/legacyDB</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Container</res-auth>
</resource-ref>

RE: How to use connection pooling in portlet?

2013-05-17T10:17:33Z

Thanks for the link..
but it will be great if someone can share a solution that can do connection pooling using ext-spring.xml

RE: How to use connection pooling in portlet?

2013-05-17T09:27:43Z

See if this thread can help you ..!!

RE: How to use connection pooling in portlet?

2013-05-17T09:07:28Z

I have a requirement where my portlet uses a different database and liferay tables are ata different database. So, I configured the database for my portlet by adding ext-spring.xml and then putting the data-source name in my service builder..

Now I have to implement connection pooling for the database referred by the portlet. So, What should be done?

RE: How to use connection pooling in portlet?

2013-05-17T06:39:56Z

Liferay by default comes with c3po as default provider . But you can change it to DBCP or other check below properties in portal-ext.

 #
    # Liferay can use C3PO, DBCP, or Tomcat for connection pooling. See
    # com.liferay.portal.dao.jdbc.util.DataSourceFactoryBean for the actual
    # implementation. It is important to understand the strengths and weaknesses
    # of each provider so that you can choose the best one that fits your
    # deployment scenario. Provider specific properties can also be passed along
    # directly to the provider. For example, the property
    # "jdbc.default.acquireIncrement" is read by C3PO, and the property
    # "jdbc.default.maxActive" is read by DBCP.
    #
    # The default provider is C3PO.
    #

    jdbc.default.liferay.pool.provider=c3po
    #jdbc.default.liferay.pool.provider=dbcp
    #jdbc.default.liferay.pool.provider=tomcat

Default pool size and other details you can get it from below properties


 #
    # The following properties will be read by C3PO if Liferay is configured to
    # use C3PO in the property "jdbc.default.liferay.pool.provider". See
    # http://www.mchange.com/projects/c3p0/index.html#configuration for a list
    # of additional fields used by C3PO for configuring database connections.
    #
    jdbc.default.acquireIncrement=5
    jdbc.default.acquireRetryAttempts=3
    jdbc.default.acquireRetryDelay=1000
    jdbc.default.connectionCustomizerClassName=com.liferay.portal.dao.jdbc.pool.c3p0.PortalConnectionCustomizer
    jdbc.default.idleConnectionTestPeriod=60
    jdbc.default.maxIdleTime=3600
    jdbc.default.maxPoolSize=100
    jdbc.default.minPoolSize=10
    jdbc.default.numHelperThreads=10
    #jdbc.default.transactionIsolation=1

Note : This is for entire portal not specific to any portlet

RE: How to use connection pooling in portlet?

2013-05-17T04:52:23Z

How can we then increase or decrease the pool size?
or any other modifications, if required?

RE: How to use connection pooling in portlet?

2013-05-16T18:34:50Z

By default it uses Liferay's connection pool. You don't need to do anything special for that to work.

How to use connection pooling in portlet?

2013-05-16T10:30:54Z

How does liferay service builder supports connection pooling?
If it does not, How can we define for the custom portlet.