Recent Posts by Stephen Felts

The latest WebLogic Server release 12.2.1.3.0 is now available as of August 30, 2017 and you can download it at http://www.oracle.com/technetwork/middleware/fusion-middleware/downloads/index.html .  See https://blogs.oracle.com/weblogicserver/weblogic-server-12213-is-available for more information on the new release.  Java SE 9 became available on September 21, 2017 and it’s available at www.oracle.com/javadownload.  Details about the features included in this release can...

A recent question was raised by a customer on how to create an Active GridLink (AGL) data source using the RESTFUL API's in WebLogic Server (WLS).  First, you can't do it with the API's provided in WLS release 12.1.3.  New API's were provided starting in WLS 12.2.1 that provide much more complete functionality.  These API's  mirror the MBeans and are more like using WLST. The following shell script creates an Active GridLink data source using minimal parameters.  You can add...

It's finally available - you can download the Oracle 12.2 database!  Integration of WebLogic Server (WLS) with Oracle 12.2 has been in progress for two years. This article provides information on how Oracle 12.2 database features are supported in WebLogic Server releases. Using Older Drivers with the 12.2 Database Server The simplest integration of WebLogic Server with a 12.2 database is to use the Oracle driver jar files included in your WebLogic Server installation. There are...

There are well known error codes on JDBC operations that can always be interpreted as the database shutting down, already down, or a configuration problem.  In this case, we don’t want to keep the connection around because we know that subsequent operations will fail and they might hang or take a long time to complete. These error codes can be configured in the datasource configuration using the "fatal-error-codes"value on the Connection Pool Parameters. The value is a...

The Oracle driver has the ability to have an @alias string in the connection string URL so that the information like the host, port, and service name can be in an external tnsnames.ora file that is shared across many datasources. My perception is that this has grown in popularity in recent years to make management of the connection information easier (one place per computer).  In an effort to centralize the information further, it's possible to use an @LDAP format in the URL...

In October 2014, we delivered Oracle WebLogic Server 12.2.1 as part of the overall Oracle Fusion Middleware 12.2.1 Release and October 2015 we delivered the first patch set release 12.2.1.1. This week, the second patch set 12.2.1.2 is available.   New WebLogic Server 12.2.1.2 installers are now posted on the Oracle Technology Network and Oracle Software Delivery Cloud, and new documentation has been made available. There are a couple of newdatasource features hidden there....

WebLogic Server 12.2.1.1 is now available. You can see the blog article announcing it at Oracle WebLogic Server 12.2.1.1 is Now Available. One of the WLS datasource features that appeared quite a while ago but not mentioned much is the ability to define a callback that is called during connection initialization.  The original intent of this callback was to provide a mechanism that is used with the Application Continuity (AC) feature.  It allows for the application to ensure...

When I first wrote an article about changing Oracle concrete classes to interfaces to work with Application Continuity (AC) (https://blogs.oracle.com/WebLogicServer/entry/using_oracle_jdbc_type_interfaces), I left out one type. oracle.sql.OPAQUE is replaced with oracle.jdbc.OracleOpaque. There isn’t a lot that you can do with this opaque type. While the original class had a lot ofconversion methods, the new Oracle type interfaces have only methods that are considered...

Introduction Oracle Notification Service (ONS) is installed and configured as part of the Oracle Clusterware installation. All nodes participating in the cluster are automatically registered with the ONS during Oracle Clusterware installation. The configuration file is located on each node in $ORACLE_HOME/opmn/conf/ons.config. See the Oracle documentation for further information. This article focuses on the client side. Oracle RAC Fast Application Notification (FAN) events...