static public void Execute()
{
try {
/*
* 1. Create RBroker instance using RBrokerFactory.
*
* This example creates a DiscreteTaskBroker.
*/
DiscreteBrokerConfig brokerConfig = new DiscreteBrokerConfig(Program.DEPLOYR_ENDPOINT);
RBroker rBroker = RBrokerFactory.discreteTaskBroker(brokerConfig);
/*
* 2. Register RTaskListener for asynchronous
* notifications on RTask completion.
*/
SampleTaskBrokerListener sampleListeners = new SampleTaskBrokerListener(rBroker);
rBroker.addTaskListener(sampleListeners);
rBroker.addBrokerListener(sampleListeners);
/*
* 3. Define RTask
*
* This example creates a DiscreteTask that will
* execute an R script, /testuser/tutorial-rbroker/5SecondNoOp.
*/
RTask rTask = RTaskFactory.discreteTask(Program.TUTORIAL_NOOP_SCRIPT,
Program.TUTORIAL_REPO_DIRECTORY,
Program.TUTORIAL_REPO_OWNER,
"",
null);
/*
* 4. Submit RTask to RBroker for execution.
*
* The RTaskToken is returned immediately. You can
* use the token to track the progress of RTask
* and/or block while waiting for a result.
*
* However, in this example we are going to allow
* the RTaskListener handle the result so
* there is nothing further for us to do here after
* we submit the RTask.
*/
RTaskToken rTaskToken = rBroker.submit(rTask);
Console.WriteLine("DiscreteProfiling: submitted " + rTask +
" for execution on RBroker.");
}
catch (Exception tex)
{
Console.WriteLine("DiscreteProfiling: ex=" + tex.ToString());
}
}
/*
* RTaskAppSimulator method.
*/
public void simulateApp(RBroker rBroker)
{
/*
* 1. Prepare RTask(s) for simulation.
*
* In the example we will simply simulate the execution
* a fixed number of RTask.
*
* Note, this is a somewhat artificial demo as we are
* executing the same RTask SIMULATE_TOTAL_TASK_COUNT
* times. You can experiment by modifying the
* implementation to execute a range of RTask of
* your own choosing.
*/
RTask rTask = RTaskFactory.discreteTask(Program.TUTORIAL_NOOP_SCRIPT,
Program.TUTORIAL_REPO_DIRECTORY,
Program.TUTORIAL_REPO_OWNER,
"",
null);
/*
* 2. Loop submitting SIMULATE_TOTAL_TASK_COUNT
* task(s) to RBroker for execution.
*/
simulationStartTime = System.Environment.TickCount;
for (int tasksPushedToBroker = 0;
tasksPushedToBroker < SIMULATE_TOTAL_TASK_COUNT;
tasksPushedToBroker++)
{
try
{
RTaskToken taskToken = rBroker.submit(rTask);
Console.WriteLine("simulateApp: submitted task " +
rTask + " for execution on RBroker.");
}
catch (Exception ex)
{
Console.WriteLine("simulateApp: ex=" + ex.ToString());
}
}
}
static public void Execute()
{
RBroker rBroker = null;
try
{
/*
* 1. Create RBroker instance using RBrokerFactory.
*
* This example creates a DiscreteTaskBroker.
*/
DiscreteBrokerConfig brokerConfig = new DiscreteBrokerConfig(Program.DEPLOYR_ENDPOINT);
rBroker = RBrokerFactory.discreteTaskBroker(brokerConfig);
/*
* 2. Define RTask
*
* This example creates a DiscreteTask that will
* execute an R script, /testuser/tutorial-rbroker/5SecondNoOp.
*/
RTask rTask = RTaskFactory.discreteTask(Program.TUTORIAL_NOOP_SCRIPT,
Program.TUTORIAL_REPO_DIRECTORY,
Program.TUTORIAL_REPO_OWNER,
"",
null);
/*
* 3. Submit RTask to RBroker for execution.
*
* Note, unlike an RClient.executeScript call or
* an RProject.executeScript call the RBroker.submit
* call is non-blocking.
*
* The RTaskToken is returned immediately. You can
* use the token to track the progress of RTask
* and/or block while waiting for a result.
*/
RTaskToken rTaskToken = rBroker.submit(rTask);
Console.WriteLine("DiscreteBlocking: submitted " + rTask + " for execution on RBroker.");
/*
* 4. Demonstrate blocking for an RTask result.
*
* The call to getResult() will either return
* an RTaskResult or raise an Exception. An Exception
* indicates the RTask failed to complete and why.
*/
RTaskResult rTaskResult = rTaskToken.getResult();
Console.WriteLine("DiscreteBlocking: " + rTask + " completed, result=" + rTaskResult.getTimeOnCall());
} catch (Exception tex)
{
Console.WriteLine("DiscreteBlocking: error=" + tex.ToString());
}
finally
{
/*
* Final Step: Shutdown RBroker to release
* all associated resources, connections.
*/
if (rBroker != null)
{
rBroker.shutdown();
Console.WriteLine("DiscreteBlocking: rBroker has been shutdown.");
}
}
}