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“VisiBroker frequently Asked Questions by expert members with experience in VisiBroker. So get preparation for the VisiBroker job interview”



27 VisiBroker Questions And Answers

2⟩ Explain VisiBroker features?

In addition to providing the features defined in the CORBA specification, VisiBroker offers enhancements that increase application performance and reliability.

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3⟩ What is VisiBroker?

VisiBroker is an ORB that offers a complete implementation of the CORBA specification. VisiBroker makes it easy for you to develop distributed, object-based client applications and servers. VisiBroker offers these important features.

Support for the C++ programming language.

Object naming.

The ability to distribute objects across a network.

Support for persistent objects.

Support for dynamic object creation

Interoperability with other ORB implementations.

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4⟩ What is the default value of "vbroker.rmi.supportRTSC" property?

The default value of "vbroker.rmi.supportRTSC" property is false.

This property enables or disables the exchange of SendingContextRuntime service contexts between clients and servers when the two are using different (evolved) versions of a class. If the client and server are on different versions of a JDK, the application should make sure that this property is set to true. This value should also be used for cases where VBJ is talking to a foreign ORB. This ensures that the codebase data is exchanged and marshaling/demarshaling of evolved classes can succeed without exceptions.

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12⟩ What is the default value of "broker.agent.port" property?

The default value of "broker.agent.port" property is "14000".

Specifies the port number that defines a domain within your network. VisiBroker applications and the Smart Agent work together when they have the same port number. This is the same property as the OSAGENT_PORT environment variable.

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14⟩ What is the default value of "vbroker.agent.retryDelay" property?

The default value of "vbroker.agent.retryDelay" property is "0 (zero)".

The duration in seconds that the process will pause before trying to reconnect to the Smart Agent in the event of disconnection from the Smart Agent. If the value is -1, the process will exit upon disconnection from the Smart Agent. The default value of 0 (zero) means that reconnection will be made without any pause.

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15⟩ What is the default value of "vbroker.agent.addr" property?

The default value of "vbroker.agent.addr" property is "null".

Specifies the IP address or host name of a host running a Smart Agent. The default value, null, instructs VisiBroker applications to use the value from the OSAGENT_ADDR environment variable. If this OSAGENT_ADDR variable is not set, then it is assumed that the Smart Agent is running on a local host.

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16⟩ What is the default value of "javax.rmi.CORBA.PortableRemoteObjectClass" property?

The default value of "javax.rmi.CORBA.PortableRemoteObjectClass" property is "com.inprise.vbroker.rmi.CORBA.PortableRemoteObjectImpl".

Specifies that the RMI-IIOP server implementation objects may inherit from javax.rmi.PortableRemoteObject or simply implement an RMI-IIOP remote interface and then use the exportObject method to register themselves as a server object.

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17⟩ What is the default value of "vbroker.agent.keepAliveTimer" property?

The default value of "vbroker.agent.keepAliveTimer" property is "120 seconds".

Smart agent will wake up after this timeout and based on the vbroker.agent.keepAliveThreshold value, will compute whether to do client verification. The logic is if the last received heart beat value is less than current time - (keepAliveTimer + keepAliveThreshold), then do client verification. The value of this property should be greater than 1 second and less than 120 seconds. The number of times the client verification is tried can be controlled by vbroker.agent.maxRetries property.

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