/// <summary>
/// Tries to create a new instance of IJob for the given JobDescriptor.
/// </summary>
/// <param name="descriptor">
/// The JobDescriptor to create an instance of IJob for.
/// </param>
/// <returns>
/// An instance of IJob that was created for the given JobDescriptor.
/// </returns>
public IJob CreateJob(JobDescriptor descriptor)
{
if (null == descriptor)
{
throw new ArgumentNullException("descriptor");
}
JobSpec spec;
if (!nameToSpecMap.TryGetValue(descriptor.Job, out spec))
{
throw new UnknownJobException(descriptor.QueueMessageId, descriptor.Job);
}
try
{
IJob job = spec.CreateAndBind(descriptor.Properties);
return(job);
}
catch (Exception ex)
{
throw new MessageFormatException(descriptor.QueueMessageId, ex);
}
}
/// <summary>
/// Applies the FailedJobHandling behavior from the current ConsumerSettings.
/// </summary>
/// <param name="job">
/// The IJob for which execution failed.
/// </param>
/// <param name="jobDesc">
/// The JobDescriptor that describes the failed job.
/// </param>
/// <param name="exception">
/// The Exception which was raised, or null if no exception was raised.
/// </param>
private void ApplyFailedJobHandling(IJob job, JobDescriptor jobDesc, Exception exception)
{
Debug.Assert(null != job, "The job must not be null.");
Debug.Assert(null != jobDesc, "The job descriptor must not be null.");
switch (consumerSettings.FailedJobHandling)
{
case FailedJobHandling.Requeue:
case FailedJobHandling.RequeueThenDeleteAfterThreshold:
case FailedJobHandling.Delete:
ApplyFailedJobHandling(consumerSettings.FailedJobHandling);
break;
case FailedJobHandling.DecidePerJob:
if (null == consumerSettings.FailedJobHandlingProvider)
{
throw new InvalidOperationException("The FailedJobHandlingProvider must not be null when 'DecidePerJob' is used.");
}
ApplyFailedJobHandling(consumerSettings.FailedJobHandlingProvider(job, jobDesc, exception));
break;
default:
throw new NotSupportedException("Unsupported FailedJobHandling: " + consumerSettings.FailedJobHandling);
}
}
/// <summary>
/// Creates a JobDescriptor object for the given job.
/// </summary>
/// <param name="job">
/// The IJob to create the JobDescriptor for.
/// </param>
/// <returns>
/// An instance of JobDescriptor that describes the job.
/// </returns>
public JobDescriptor Describe(IJob job)
{
Debug.Assert(null != job, "The job must not be null.");
JobDescriptor descriptor = new JobDescriptor();
descriptor.Job = Name;
Debug.Assert(null != Properties, "The properties dictionary must not be null.");
if (0 < Properties.Count)
{
descriptor.Properties = new Dictionary <string, JToken>(Properties.Count);
foreach (KeyValuePair <string, PropertyInfo> prop in Properties)
{
object val = prop.Value.GetValue(job);
JToken token;
if (null == val)
{
token = JValue.CreateNull();
}
else
{
token = JToken.FromObject(val);
}
descriptor.Properties.Add(prop.Key, token);
}
}
return(descriptor);
}
/// <summary>
/// Produces one message for the given job descriptor and adds it to the queue.
/// </summary>
/// <param name="descriptor">
/// The JobDescriptor which describes the job to produce.
/// </param>
/// <param name="initialVisibilityDelay">
/// A TimeSpan value specifying the interval of time from now during which the message will be invisible. If
/// null then the message will be visible immediately.
/// </param>
public void One(JobDescriptor descriptor, TimeSpan?initialVisibilityDelay)
{
if (null == descriptor)
{
throw new ArgumentNullException("descriptor");
}
else if (String.IsNullOrWhiteSpace(descriptor.Job))
{
throw new ArgumentException("The JobDescriptor must have a non-null and non-blank Job property.");
}
string body = JsonConvert.SerializeObject(descriptor);
CloudQueueMessage msg = new CloudQueueMessage(body);
queue.AddMessageAsync(msg, /* timeToLive */ null, initialVisibilityDelay, null, null).GetAwaiter().GetResult();
}
/// <summary>
/// Tries to create a JobDescriptor for the given job.
/// </summary>
/// <param name="job">
/// The IJob object to create a descriptor for.
/// </param>
/// <returns>
/// An instance of JobDescriptor that describes the job.
/// </returns>
public JobDescriptor CreateDescriptor(IJob job)
{
if (null == job)
{
throw new ArgumentNullException("job");
}
JobSpec spec;
if (!typeToSpecMap.TryGetValue(job.GetType(), out spec))
{
throw new UnknownJobException(null, job.GetType().Name);
}
JobDescriptor descriptor = spec.Describe(job);
return(descriptor);
}
/// <summary>
/// Tries to create a new instance of IJob for the given JobDescriptor.
/// </summary>
/// <param name="descriptor">
/// The JobDescriptor to create an instance of IJob for.
/// </param>
/// <returns>
/// An instance of IJob that was created for the given JobDescriptor.
/// </returns>
public IJob CreateJob(JobDescriptor descriptor)
{
if (null == descriptor)
{
throw new ArgumentNullException("descriptor");
}
JobSpec spec;
if (!nameToSpecMap.TryGetValue(descriptor.Job, out spec))
{
throw new UnknownJobException(descriptor.QueueMessageId, descriptor.Job);
}
IJob job = spec.CreateAndBind(descriptor.Properties);
return job;
}
/// <summary>
/// Produces one message for the given job descriptor and adds it to the queue.
/// </summary>
/// <param name="descriptor">
/// The JobDescriptor which describes the job to produce.
/// </param>
public void One(JobDescriptor descriptor)
{
One(descriptor, null);
}
/// <summary>
/// Produces one message for the given job descriptor and adds it to the queue.
/// </summary>
/// <param name="descriptor">
/// The JobDescriptor which describes the job to produce.
/// </param>
/// <param name="initialVisibilityDelay">
/// A TimeSpan value specifying the interval of time from now during which the message will be invisible. If
/// null then the message will be visible immediately.
/// </param>
public void One(JobDescriptor descriptor, TimeSpan? initialVisibilityDelay)
{
if (null == descriptor)
{
throw new ArgumentNullException("descriptor");
}
else if (String.IsNullOrWhiteSpace(descriptor.Job))
{
throw new ArgumentException("The JobDescriptor must have a non-null and non-blank Job property.");
}
string body = JsonConvert.SerializeObject(descriptor);
CloudQueueMessage msg = new CloudQueueMessage(body);
queue.AddMessage(msg, /* timeToLive */ null, initialVisibilityDelay);
}
/// <summary>
/// Produces one message for the given job descriptor and adds it to the queue.
/// </summary>
/// <param name="descriptor">
/// The JobDescriptor which describes the job to produce.
/// </param>
public void One(JobDescriptor descriptor)
{
One(descriptor, null);
}
/// <summary>
/// Creates a JobDescriptor object for the given job.
/// </summary>
/// <param name="job">
/// The IJob to create the JobDescriptor for.
/// </param>
/// <returns>
/// An instance of JobDescriptor that describes the job.
/// </returns>
public JobDescriptor Describe(IJob job)
{
Debug.Assert(null != job, "The job must not be null.");
JobDescriptor descriptor = new JobDescriptor();
descriptor.Job = Name;
Debug.Assert(null != Properties, "The properties dictionary must not be null.");
if (0 < Properties.Count)
{
descriptor.Properties = new Dictionary<string, JToken>(Properties.Count);
foreach (KeyValuePair<string, PropertyInfo> prop in Properties)
{
object val = prop.Value.GetValue(job);
JToken token;
if (null == val)
{
token = JValue.CreateNull();
}
else
{
token = JToken.FromObject(val);
}
descriptor.Properties.Add(prop.Key, token);
}
}
return descriptor;
}
/// <summary>
/// Applies the UnknownJobHandling behavior from the current ConsumerSettings.
/// </summary>
/// <param name="jobDesc">
/// The JobDescriptor that describes the unknown job.
/// </param>
private void ApplyUnknownJobHandling(JobDescriptor jobDesc)
{
Debug.Assert(null != jobDesc, "The job descriptor must not be null.");
switch (consumerSettings.UnknownJobHandling)
{
case UnknownJobHandling.Requeue:
case UnknownJobHandling.Delete:
ApplyUnknownJobHandling(consumerSettings.UnknownJobHandling);
break;
case UnknownJobHandling.DedicePerJob:
if (null == consumerSettings.UnknownJobHandlingProvider)
{
throw new InvalidOperationException("The UnknownJobHandlingProvider must not be null when 'DedicePerJob' is used.");
}
ApplyUnknownJobHandling(consumerSettings.UnknownJobHandlingProvider(jobDesc));
break;
default:
throw new NotSupportedException("Unsupported UnknownJobHandling: " + consumerSettings.UnknownJobHandling);
}
}
