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()
{
try
{
/*
* 1. Create RBroker instance using RBrokerFactory.
*
* This example creates a BackgroundTaskBroker.
*/
RAuthentication rAuth = new RBasicAuthentication(Program.AUTH_USER_NAME, Program.AUTH_PASSWORD);
BackgroundBrokerConfig brokerConfig = new BackgroundBrokerConfig(Program.DEPLOYR_ENDPOINT, rAuth);
RBroker rBroker = RBrokerFactory.backgroundTaskBroker(brokerConfig);
/*
* 2. Register RTaskListener for asynchronous
* notifications on RTask completion.
*/
BackgroundTaskListener myTaskListener = new BackgroundTaskListener(rBroker);
rBroker.addTaskListener(myTaskListener);
/*
* 3. Define RTask
*
* This example creates a BackgroundTask that will
* execute an artibrary block of R code.
*/
String rCode = "x <- rnorm(100)";
RTask rTask = RTaskFactory.backgroundTask("Example Background RTask",
"Example background RTask.",
rCode,
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("Submitted " + rTask + " for execution on RBroker.");
/*
* 4. Block until all tasks are complete, and shutdown has been called
*/
rBroker.waitUntilShutdown();
}
catch (Exception tex)
{
Console.WriteLine("Runtime exception=" + tex.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.");
}
}
}
private void RBrokerListenerManager()
{
while (Interlocked.Read(ref m_taskBrokerIsActive) == 1)
{
int tasksHandledOnLoop = 0;
try
{
while (m_liveTaskTokens.Count() == 0 && Interlocked.Read(ref m_taskBrokerIsActive) == 1)
{
Thread.Sleep(LIVE_TASK_TOKEN_PEEK_INTERVAL);
}
foreach (RTaskToken rTaskToken in m_liveTaskTokens)
{
Boolean repeatTaskFound = false;
if (rTaskToken.isDone())
{
RTaskResult result = null;
try
{
// Extract task result.
result = (RTaskResult)rTaskToken.getResult();
if (m_taskListener != null)
{
if (((RTaskResultImpl)result).repeatTask)
{
repeatTaskFound = true;
}
else
{
try
{
m_taskListener.onTaskCompleted(rTaskToken.getTask(), result);
}
catch
{
/*
* RBrokerEngine onTaskCompleted
* is calling back into client
* application code. That code
* could erroneously throw an
* Exception back into
* RBrokerEngine. If so, swallow
* it.
*/
}
}
}
}
catch (Exception ex)
{
if (m_taskListener != null)
{
m_taskListener.onTaskError(rTaskToken.getTask(), ex.ToString());
}
}
RTaskToken tempTaskToken = null;
m_liveTaskTokens.TryTake(out tempTaskToken);
if (!repeatTaskFound)
{
tasksHandledOnLoop++;
updateBrokerStats(result);
}
}
}
}
catch (Exception ex)
{
if (m_brokerListener != null)
{
m_brokerListener.onRuntimeError(ex.ToString());
}
}
if (tasksHandledOnLoop > 0)
{
if (m_brokerListener != null)
{
m_brokerListener.onRuntimeStats(buildStats(), (int)maxConcurrency());
}
}
} // while taskBrokerIsActive
}
/*
* RTaskAppSimulator method.
*/
public void simulateApp(RBroker rBroker)
{
/*
* 2. Submit task(s) to RBroker for execution.
*/
Console.WriteLine("About to simulate " +
SIMULATE_TOTAL_TASK_COUNT + " tasks at a rate of " +
SIMULATE_TASK_RATE_PER_MINUTE + " tasks per minutes.");
simulationStartTime = System.Environment.TickCount;
for (int tasksPushedToBroker = 0;
tasksPushedToBroker < SIMULATE_TOTAL_TASK_COUNT;
tasksPushedToBroker++)
{
try {
/*
* 1. Prepare RTask for real-time scoring.
*
* In this example, we pass along a unique
* customer ID with each RTask. In a real-world
* application the input parameters on each RTask
* will vary depending on need, such as customer
* database record keys and supplimentary parameter
* data to facilitate the scoring.
*/
PooledTaskOptions taskOptions = new PooledTaskOptions();
taskOptions.routputs.Add("score");
taskOptions.rinputs.Add(RDataFactory.createNumeric("customerid", tasksPushedToBroker));
RTask rTask = RTaskFactory.pooledTask(Program.TUTORIAL_RTSCORE_SCRIPT,
Program.TUTORIAL_REPO_DIRECTORY,
Program.TUTORIAL_REPO_OWNER,
null, taskOptions);
RTaskToken taskToken = rBroker.submit(rTask);
Console.WriteLine("Submitted task " + rTask + "\n");
/*
* If further tasks need to be pushed to broker
* then delay for staggeredLoadInterval to simulate
* control of task flow rate.
*/
if (tasksPushedToBroker < (SIMULATE_TOTAL_TASK_COUNT - 1))
{
try {
if (SIMULATE_TASK_RATE_PER_MINUTE != 0L)
{
int staggerLoadInterval = 60 / SIMULATE_TASK_RATE_PER_MINUTE;
Thread.Sleep(staggerLoadInterval * 1000);
}
}
catch (Exception iex)
{
Console.WriteLine("Runtime exception=" + iex.ToString());
}
}
}
catch (Exception ex)
{
Console.WriteLine("Runtime exception=" + ex.ToString());
}
}
}
