protected virtual AcquiredJobs AcquireJobs(JobAcquisitionContext context, IJobAcquisitionStrategy acquisitionStrategy, ProcessEngineImpl currentProcessEngine)
{
ICommandExecutor commandExecutor = ((ProcessEngineConfigurationImpl)currentProcessEngine.ProcessEngineConfiguration).CommandExecutorTxRequired;
var numJobsToAcquire = acquisitionStrategy.GetNumJobsToAcquire(currentProcessEngine.Name);
AcquiredJobs acquiredJobs = null;
if (numJobsToAcquire > 0)
{
JobExecutor.LogAcquisitionAttempt(currentProcessEngine);
acquiredJobs = commandExecutor.Execute(JobExecutor.GetAcquireJobsCmd(numJobsToAcquire));
}
else
{
acquiredJobs = new AcquiredJobs(numJobsToAcquire);
}
context.SubmitAcquiredJobs(currentProcessEngine.Name, acquiredJobs);
JobExecutor.LogAcquiredJobs(currentProcessEngine, acquiredJobs.Size());
JobExecutor.LogAcquisitionFailureJobs(currentProcessEngine, acquiredJobs.NumberOfJobsFailedToLock);
Log.AcquiredJobs(currentProcessEngine.Name, acquiredJobs);
return(acquiredJobs);
}
public ProcessEngineImpl(ProcessEngineConfigurationImpl processEngineConfiguration)
{
this.processEngineConfiguration = processEngineConfiguration;
Name = processEngineConfiguration.ProcessEngineName;
RepositoryService = processEngineConfiguration.RepositoryService;
RuntimeService = processEngineConfiguration.RuntimeService;
HistoryService = processEngineConfiguration.HistoryService;
IdentityService = processEngineConfiguration.IdentityService;
TaskService = processEngineConfiguration.TaskService;
FormService = processEngineConfiguration.FormService;
ManagementService = processEngineConfiguration.ManagementService;
AuthorizationService = processEngineConfiguration.AuthorizationService;
//this.caseService = processEngineConfiguration.CaseService;
FilterService = processEngineConfiguration.FilterService;
ExternalTaskService = processEngineConfiguration.ExternalTaskService;
DecisionService = processEngineConfiguration.DecisionService;
DatabaseSchemaUpdate = processEngineConfiguration.DatabaseSchemaUpdate;
JobExecutor = processEngineConfiguration.JobExecutor;
commandExecutor = processEngineConfiguration.CommandExecutorTxRequired;
CommandExecutorSchemaOperations = processEngineConfiguration.CommandExecutorSchemaOperations;
//SessionFactories = processEngineConfiguration.SessionFactories;
HistoryLevel = processEngineConfiguration.HistoryLevel;
TransactionContextFactory = processEngineConfiguration.TransactionContextFactory;
Log.LogDebug("使用的TransactionContextFactory:", TransactionContextFactory.GetType().Name.ToString());
//TODO 数据库初始化入口
//ExecuteSchemaOperations();
if (ReferenceEquals(Name, null))
{
Name = ProcessEngines.NameDefault;
Log.ProcessEngineCreated(ProcessEngines.NameDefault);
}
else
{
Log.ProcessEngineCreated(Name);
}
ProcessEngines.RegisterProcessEngine(this);
if (JobExecutor != null)
{
JobExecutor.RegisterProcessEngine(this);
}
if (processEngineConfiguration.MetricsEnabled)
{
var reporterId = processEngineConfiguration.MetricsReporterIdProvider.ProvideId(this);
var dbMetricsReporter = processEngineConfiguration.DbMetricsReporter;
dbMetricsReporter.ReporterId = reporterId;
if (processEngineConfiguration.DbMetricsReporterActivate)
{
dbMetricsReporter.Start();
}
}
}
public override void Run()
{
lock (this)
{
Log.StartingToAcquireJobs(JobExecutor.Name);
var acquisitionStrategy = InitializeAcquisitionStrategy();
while (!IsInterrupted)
{
AcquisitionContext.Reset();
AcquisitionContext.AcquisitionTime = (DateTime.Now.Ticks / 10000000);//DateTime.Now.Millisecond;
var engineIterator = JobExecutor.EngineIterator();
try
{
while (engineIterator.MoveNext())
{
var currentProcessEngine = engineIterator.Current;
if (!JobExecutor.HasRegisteredEngine(currentProcessEngine))
{
continue;
}
var acquiredJobs = AcquireJobs(AcquisitionContext, acquisitionStrategy, currentProcessEngine);
ExecuteJobs(AcquisitionContext, currentProcessEngine, acquiredJobs);
}
}
catch (System.Exception e)
{
Log.ExceptionDuringJobAcquisition(e);
AcquisitionContext.AcquisitionException = e;
}
AcquisitionContext.JobAdded = IsJobAdded;
ConfigureNextAcquisitionCycle(AcquisitionContext, acquisitionStrategy);
//The clear had to be done after the configuration, since a hint can be
//appear in the suspend and the flag shouldn't be cleaned in this case.
//The loop will restart after suspend with the isJobAdded flag and
//reconfigure with this flag
ClearJobAddedNotification();
var waitTime = acquisitionStrategy.WaitTime;
// wait the requested wait time minus the time that acquisition itself took
// this makes the intervals of job acquisition more constant and therefore predictable
waitTime = Math.Max(0, (AcquisitionContext.AcquisitionTime + waitTime) - (DateTime.Now.Ticks / 10000000));
SuspendAcquisition(waitTime);
}
Log.StoppedJobAcquisition(JobExecutor.Name);
}
}
public BackoffJobAcquisitionStrategy(JobExecutor jobExecutor)
: this(jobExecutor.WaitTimeInMillis,
jobExecutor.WaitIncreaseFactor,
jobExecutor.MaxWait,
jobExecutor.BackoffTimeInMillis,
jobExecutor.WaitIncreaseFactor,
jobExecutor.MaxBackoff,
jobExecutor.BackoffDecreaseThreshold,
jobExecutor.MaxJobsPerAcquisition)
{
}
public virtual void run()
{
try
{
ESS.FW.Bpm.Engine.Impl.JobExecutor.JobExecutor jobExecutor = outerInstance.processEngineConfiguration.JobExecutor;
jobs = outerInstance.processEngineConfiguration.CommandExecutorTxRequired.Execute(new ControlledCommand <AcquiredJobs>(activeThread, new AcquireJobsCmd(jobExecutor)));
}
catch (OptimisticLockingException e)
{
this.exception = e;
}
Debug.WriteLine(TestContext.CurrentContext.Test.Name + " ends");
}
protected internal virtual void ExecuteJobs(JobAcquisitionContext context, ProcessEngineImpl currentProcessEngine, AcquiredJobs acquiredJobs)
{
// submit those jobs that were acquired in previous cycles but could not be scheduled for execution
var additionalJobs = context.AdditionalJobBatchesByEngine.GetValueOrNull(currentProcessEngine.Name);
if (additionalJobs != null)
{
foreach (var jobBatch in additionalJobs)
{
Log.ExecuteJobs(currentProcessEngine.Name, jobBatch);
JobExecutor.ExecuteJobs(jobBatch, currentProcessEngine);
}
}
// submit those jobs that were acquired in the current cycle
foreach (var jobIds in acquiredJobs.JobIdBatches)
{
Log.ExecuteJobs(currentProcessEngine.Name, jobIds);
JobExecutor.ExecuteJobs(jobIds, currentProcessEngine);
}
}
////////// helper methods ////////////////////////////
public virtual void WaitForJobExecutorToProcessAllJobs(long maxMillisToWait, int intervalMillis,
ESS.FW.Bpm.Engine.Impl.JobExecutor.JobExecutor jobExecutor, IRuntimeService runtimeService, bool shutdown)
{
try
{
InteruptTask task = new InteruptTask(Thread.CurrentThread);
System.Threading.Timer timer = new Timer(task.Run, null, maxMillisToWait, 0);
bool areJobsAvailable = true;
try
{
while (areJobsAvailable && !task.TimeLimitExceeded)
{
Thread.Sleep(intervalMillis);
areJobsAvailable = AreJobsAvailable(runtimeService);
}
}
catch (ThreadInterruptedException e)
{
}
finally
{
timer.Change(-1, 0);
}
if (areJobsAvailable)
{
throw new ProcessEngineException("time limit of " + maxMillisToWait + " was exceeded");
}
}
finally
{
if (shutdown)
{
jobExecutor.Shutdown();
}
}
}
protected internal void setUp()
{
//base.SetUp();
jobExecutor = processEngineConfiguration.JobExecutor;
}
public SequentialJobAcquisitionRunnable(JobExecutor jobExecutor) : base(jobExecutor)
{
AcquisitionContext = InitializeAcquisitionContext();
}
public ExecuteJobsRunnable(IList <string> jobIds, ProcessEngineImpl processEngine)
{
_jobIds = jobIds;
_processEngine = processEngine;
_jobExecutor = ((ProcessEngineConfigurationImpl)processEngine.ProcessEngineConfiguration).JobExecutor;
}
private AcquiredJobs GetExecutableJobs(ESS.FW.Bpm.Engine.Impl.JobExecutor.JobExecutor jobExecutor)
{
return(processEngineConfiguration.CommandExecutorTxRequired.Execute(new AcquireJobsCmd(jobExecutor)));
}
public virtual void JobsRejected(IList <string> jobIds, ProcessEngineImpl processEngine, JobExecutor jobExecutor)
{
var acquireJobsRunnable = jobExecutor.AcquireJobsRunnable;
if (acquireJobsRunnable is SequentialJobAcquisitionRunnable)
{
var context = ((SequentialJobAcquisitionRunnable)acquireJobsRunnable).AcquisitionContext;
context.SubmitRejectedBatch(processEngine.Name, jobIds);
}
else
{
jobExecutor.GetExecuteJobsRunnable(jobIds, processEngine).Run(null);
}
}
public AcquireJobsRunnable(JobExecutor jobExecutor)
{
this.JobExecutor = jobExecutor;
}
public DefaultAcquireJobsCommandFactory(JobExecutor jobExecutor)
{
this.JobExecutor = jobExecutor;
}
public virtual void JobsRejected(IList <string> jobIds, ProcessEngineImpl processEngine, JobExecutor jobExecutor)
{
jobExecutor.GetExecuteJobsRunnable(jobIds, processEngine).Run(null);
}
public MessageAddedNotification(JobExecutor jobExecutor)
{
this.JobExecutor = jobExecutor;
}
