Hi all,
I have a custom "tracing" Java launch type that is a wrapper around a JDT local
Java launch. At the start of this launch I want to do the equivalent of the
following:
lttng create -o /path/to/session/dir mySession123
lttng enable-event -a -u --session mySession123
lttng start mySession123
then let the launch of the app run to termination (and it has a tracer that
leverages UST to log a subset of Java function entry/exits). Then I:
lttng stop mySession123
lttng destroy mySession123
I started rolling up my sleeves and using ProcessBuilder to spawn this, but
then realized that was probably a bad idea since then it would not work for
remote Java app tracing (which I would like to enable eventually)
Then I actually looked through the ControlView code that Bernd Huffman wrote,
and it would appear that a better approach would be to use the
LTTngControlServiceFactory class to create an instance of ILttngControlService
since you guys already thought this through? I guess given that I use RSE
already (which we do) it would look something like this (omitting some details
...):
void startMySession( IHost host ) {
IRemoteSystemProxy proxy = new RemoteSystemProxy(host);
proxy.connect(...) // ??
ILttngControlService controlService =
LTTngControlServiceFactory.getInstance().getLttngControlService(
proxy.createCommandShell() );
// then after this I can create a session:
ISessionInfo sessionInfo =
controlService.createSession("mySession123","/path/to/session/dir",monitor);
//enable all events
controlService.enableEvents("mySession123",null, new
ArrayList<String>(),false,null,monitor);
//start the session
controlService.startSession("mySession123",monitor);
}
void stopMySesstion() {
controlService.stopSession("mySession123",monitor);
controlService.destroySession("mySession123");
}
Can I do this from some other plugin? Is it more sensible to open and then
actually programmatically drive the ControlView? (I guess then it would
actually have entries for my tracing, which might be useful. Maybe.)
any comments/better ideas are most welcome.
Aaron Spear
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