• Product Name: VisiBroker
• Product Version: All
• Product Componet; VisiNotify
• Platform/OS Version: all
• JDK/Compiler Version: all

Is there a way to set the maximum number of consumers and the maximum number of suppliers?

The MaxConsumers and MaxSuppliers admin properties can be set to limit the maximum number of consumers and suppliers.

The admin properties are defined by the org.omg.CosNotification.AdminPropertiesAdmin interface. Below is the list of valid properties and their default values:

The above properties can be changed programmatically.

org.omg.CosNotifyChannelAdmin.EventChannel inherits org.omg.CosNotification.AdminPropertiesAdmin and can therefore access these properties through set_admin() method. Inversely, the get_admin() method retrieves these properties.

To set these properties, refer to the explanation below:

1. Define the Property's.
   Property maxConsumers = new Property( "MaxConsumers", maxConsumersValue );
   Property maxSuppliers = new Property( "MaxSuppliers", maxSuppliersValue );
   // and so on...
   // (The "maxConsumersValue" and "maxSuppliersValue" should be of type org.omg.CORBA.Any)
2. Set Property Array
   
   Property[] adminProps = new Property[] { maxConsumers, 
                                            maxSuppliers, 
                                            // and so on... 
                                          }; 
3. set it through channel's Admin
   
   channel.set_admin( adminProps ); 

Note 1: One may set only one property and only the value of that property will be changed. The other properties will maintain their previous values. If no previous values were explicitly set, the default values will be kept.

Note 2: To prevent typographical errors, instead of spelling out "MaxConsumers", one may import and use org.omg.CosNotification.MaxConsumers. Its value attribute contains the string MaxConsumers. This also applies for "MaxSuppliers", "MaxQueueLength", "RejectNewEvents", "VBPersistentStorageSize".