Devices are managed by the communication between the plug-in (a servlet) that resides on the device Manager server and the device agent on the Windows client system.
Job parameters are stored in a hashtable and are passed to the device class plug-in code when the job is executed. Create a job object for setting job definition attributes as shown below.
作业参数存储在哈希表中，并当作业执行时将其发送到设备类的插件代码中。
3
In our present situation, the v4l2src plug-in is the video4linux2 source; its default behavior is to find the first supported video device known to the kernel and stream video off it.