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First of all, by selecting the queue you wish to
snoop in the namespace tree, the Enterprise Manager
will display a number of panels in a tabbed pane. One
of these tabs is labelled 'Snoop'. Selecting the snoop
tab will display a panel like the one shown in the image
below.
The snoop panel is split up into a number of different
sections. Firstly, the 3 text fields at the top of the
panel allow you enter an event id range to and from,
and a selector string that will be used to filter events
being snooped on the channel. For queues, the event
id ranges are disabled. Clicking the 'Start' button
will begin the queue snoop, and start displaying any
events that are published onto the queue using whatever
values you have input into the text fields.
When events are published, they are added to the main
table below the text field input. This main table shows
4 columns of basic information about each event: the
event id, event tag, time to live, and whether the event
is persistent. By clicking on any event shown as a row
in the main table, more information on the event is
shown in the bottom 3 panels. As shown in the image
below.
The top 2 remaining panels show a Hexidecimal view
of the event data and an ASCII representation of the
same event data. The panel below that shows the contents
of the event
properties (if one exists for the event) listed
within a table. Each property is displayed as a row
in the table. The table columns show the name of the
property, the type, and the value.
The button labelled 'Pause' will temporarily suspend
receipt of any new message being received into the snoop
panel for the selected queue. The 'Stop' button will
stop snooping events and clear all the panels and tables.
Channels
can also be snooped using the snoop panel. |
