Creating the Counter Desks Table Monitor

Procedure

1. BankMBean:

   public Serializable[][] getDesks();

1. Bank:

   public Serializable[][] getDesks() {
      return BankProperties.getDesks();
   }

1. Modify the monitor-configuration.xml:
   1. Define the monitor-semantics:

      <table-configuration-group name="CounterDesks">
         <description ID="Counter desks">Name of the cashier, number of the desk, floor</description>
         <data-collection>
            <polled-by-monitor period="1" unit="MINUTE"/>
         </data-collection>
         <columns>
            <column>Name</column>
            <column>Desk number</column>
            <column>Floor</column>
         </columns>
      </table-configuration-group>

1. Define the monitor-tree:

   <table-monitor name="Counter desks" filename="Bank.CounterDesks" configuration-group="CounterDesks">
      <monitored-resource name="BankMBean" type="APPLICATION"/>
      <table-attribute-mapping>
         <table-entries-attribute>
            <observed-resource-attribute name="Desks"/>
         </table-entries-attribute>
      </table-attribute-mapping>
   </table-monitor>

The monitoring framework expects a Serializable[][] value for the table monitors, that is why the return value of the getDesks() method is Serializable[][] . This method is declared in the BankMBean interface and it is implemented in the class Bank . In the monitor-semantics part of the monitor-configuration.xml a table-configuration-group is declared with name CounterDesks, which is used for creating the node in the monitor tree (the monitor-tree part in the XML). The ID in the Counter desksdescription is the name of the monitor shown in the tree. The table has 3 columns: Name, Desk number, and Floor, declared in monitor-semantics under the <columns> tag.

Result

The Counter Desksmonitor appears in the monitoring tree under Applications → Bank Information → General Information.