This tutorial shows you how to use the Oracle WebLogic Server 12c Additional tutorials extend this cluster's capabilities to support load balancing and failover of Java Platform, Enterprise Edition applications. The data source has a collection of database connections called a connection pool.
An application can request a connection from the data source, use the connection to access the database, and then close the connection. Rather than actually close the connection, however, the data source places it back in the connection pool to be used again.
Data sources can be created as part of the configuration of an instance of WebLogic Server. When that server comes up, or the data source is deployed , the server creates database connections to fill the connection pool of its data source.
Dynamic clusters consist of server instances that can be dynamically scaled up to meet the resource needs of your application. A dynamic cluster uses a single server template to define configuration for a specified number of generated dynamic server instances. When you create a dynamic cluster, the dynamic servers are preconfigured and automatically generated for you, enabling you to easily scale up the number of server instances in your dynamic cluster when you need additional server capacity.
You can simply start the dynamic servers without having to first manually configure and add them to the cluster. If you need additional server instances on top of the number you originally specified, you can increase the maximum number of servers instances dynamic in the dynamic cluster configuration or manually add configured server instances to the dynamic cluster.
A dynamic cluster that contains both dynamic and configured server instances is called a mixed cluster. Using the WLDF Policies and Actions component, you can write policy expressions that will automatically scale up or scale down a dynamic cluster. These policies will monitor one or more resources, such as memory, idle threads, and CPU. When the configured threshold is met, the scaling action is triggered.
Oracle WebLogic Server 12c Web application archives use the. This tutorial covers using the Oracle WebLogic Server 12c You learn how to start and run the application, redeploy an updated version of the application, and undeploy the application. Duration: 60 minutes Oracle WebLogic Server 12c You can also save groups of commands in files so that you can reliably perform the same tasks many times. This tutorial introduces you to WLST.
It gives you a chance to practice basic commands and to change server attributes from the command line. Duration: 60 minutes Oracle Weblogic Server 12c Duration: 45 minutes Oracle WebLogic Server 12c Advaced Java Notes by Mr. Nataraj from Ameerpeta. Hibernate Notes by Mr. Nataraj from Sathya Technologies. Core Java notes by Mr. Ratan from Durgasoft. Back to Top. Friends Links javac. If you do not, the following warning message is displayed:.
Warning: An insecure protocol was used to connect to the server. To ensure on-the-wire security, the SSL port or Admin port should be used instead.
For detailed information about the connect command, see connect. Follow these rules when entering WLST commands. For example:. WLST incorporates two Jython functions that support running scripts: java weblogic.
WLST filePath. To run the script examples in this guide, copy and save the commands in a text file with a. Use the text file with the commands for running scripts that are listed below.
There are sample scripts that you can use as a template when creating a script. To prevent exiting WLST, use the -i flag. WLST -i filePath.
Use the following command to execute the specified script after invoking WLST. The main steps include converting WLST definitions and method declarations to a. The Jython package manager processes the JAR files in your classpath. The Jython prompt appears:. To display information about WLST commands and variables, enter the help command. If you specify the help command without arguments, WLST summarizes the command categories. To display information about a particular command, variable, or command category, specify its name as an argument to the help command.
To list a summary of all online or offline commands from the command line using the following commands, respectively:. For example, to display information about the disconnect command, enter the following command:. Description: Disconnect from a weblogic server instance. You must specify the file pathname for storing WLST commands when you enter the startRecording command. You can also optionally specify whether or not you want to capture all user interactions, or just the WLST commands; the recordAll argument defaults to false.
For example, to record WLST commands in the record. For more information, see startRecording and stopRecording. You must specify the pathname of the file to which you want to redirect WLST output. You can also optionally specify whether you want WLST output to be sent to stdout ; the toStdOut argument defaults to true.
For more information, see redirect and stopRedirect. To convert an existing server configuration config directory to an executable WLST script, enter:.
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