Online Property Modifier

Context

When working with AS Java services, you may want to use the command line, a UNIX script, or a Windows batch file to perform some operations, such as modifying online modifiable properties, getting/setting attributes, or invoking operations of JMX MBean objects.

For such use cases, a command line tool is created, called Online Property Modifier (OPM). This tool is located in folder /usr/sap/[SID]/[IID]/j2ee/configtool.

Starting the OPM Tool

You can use the following files to start the OPM tool, depending on your operating system (OS):

• opm.bat - a batch file for Microsoft Windows OS
• opm.sh - a bash script for UNIX-based OS
• opm.csh - a csh script for UNIX-based OS

Activities

Use the OPM tool to:

• Modify online modifiable service properties on an instance level;
• Read service properties defined on an instance level;
• Set and get attributes of JMX MBean objects;
• Invoke operations of JMX MBean objects.

JMX MBean objects can be specified either by their object name, or by their J2EE type and name.

Limitations

• OPM cannot perform operations on instances that are not running on the local host.
• OPM cannot execute MBean operations on MBeans that have more than one operation with the same name and number of arguments.
• OPM supports only the following data types:
  • java.lang.String
  • [Ljava.lang.String; (a directional array of java.lang.String)
  • short
  • int
  • long
  • byte
  • char
  • float
  • double
  • java.util.Date with format dd-MM-yyyy hh:mm:ss
  • boolean
  • java.util.Properties
  • java.lang.Object
  • javax.management.ObjectName
• OPM can display only the following data types:
  • [Ljava.lang.String;
  • [[Ljava.lang.String;
  • [Ljavax.management.ObjectName;
  • [Ljava.util.Properties;
  • [Lshort;