Velocity Analytics Broadcast Server Input Adapter

Name: Use this required field to specify or change the name of this instance of this component, which must be unique in the current EventFlow module. The name must contain only alphabetic characters, numbers, and underscores, and no hyphens or other special characters. The first character must be alphabetic or an underscore.

Adapter: A read-only field that shows the formal name of the adapter.

Class name: Shows the fully qualified class name that implements the functionality of this adapter. If you need to reference this class name elsewhere in your application, you can right-click this field and select Copy from the context menu to place the full class name in the system clipboard.

Start with application: If this field is set to Yes (default) or to a module parameter that evaluates to true, this instance of this adapter starts as part of the JVM engine that runs this EventFlow module. If this field is set to No or to a module parameter that evaluates to false, the adapter instance is loaded with the engine, but does not start until you send an sbadmin resume command, or until you start the component with StreamBase Manager.

Enable Error Output Port: Select this check box to add an Error Port to this component. In the EventFlow canvas, the Error Port shows as a red output port, always the last port for the component. See Using Error Ports to learn about Error Ports.

Description: Optionally enter text to briefly describe the component's purpose and function. In the EventFlow canvas, you can see the description by pressing Ctrl while the component's tooltip is displayed.

This section describes the properties on the Advanced Properties tab in the Properties view for the Velocity Analytics Broadcast Server Input adapter.

This section describes the Port Management tab in the Properties view for the Velocity Analytics Broadcast Server Input adapter.

Use this tab to specify the mapping of output ports to flex record definitions. Flex records are defined in the flex record definition file corresponding to the flex records multicast from the Velocity Analytics Broadcast Server you are using. You must import the XML file that defines these record definitions into the Studio project that includes this adapter, and specify that file's name in the Flex Record XML File property. An example flex record definition file is provided as VhayuRecordDefinitions.xml in the Velocity Adapters Sample.

The Port Management tab takes the form of a Port to Flex Record Mapping grid where you enter one port#=FRDef entry per line, with each line corresponding to an output port for this adapter instance. The FRDef value must correspond to the name attribute of an <FRDef> entry in the flex record definition file; examples are Trade, Quote, FRCanCor, Depth, and so on.

The port# value is zero-based. Thus: port0, then port1, then port2, and so on.

Each record mapping line in the grid can be in one of two forms:

For this adapter, it is recommended to keep Multiplicity set at single.

Use the Concurrency tab to specify parallel regions for this instance of this component, or multiplicity options, or both. The Concurrency tab settings are described in Concurrency Options, and dispatch styles are described in Dispatch Styles.

The Velocity Analytics Broadcast Server Input adapter's ports are used as follows:

Add an instance of the adapter to a new EventFlow application as follows:

The adapter uses the logging facility provided by StreamBase, which provides built-in support for standard loggers such as Log4J and Logback. See Using StreamBase Logging in the Administration Guide.

Logging is controlled through the XML configuration file, logback.xml. Using this configuration file, you can customize logging based on your needs. For example, you can change the log message format, include or remove timestamps, and so on. The logging level for the individual adapter messages can be set through the Log Level drop-down control in the Adapter Properties section of the Properties view.