SqlWorkflowInstanceStore.InstanceEncodingOption Property

Definition

Namespace:

System.Activities.DurableInstancing

Assembly:

System.Activities.DurableInstancing.dll

Specifies a value that indicates whether the instance data must be compressed.

public:
 property System::Activities::DurableInstancing::InstanceEncodingOption InstanceEncodingOption { System::Activities::DurableInstancing::InstanceEncodingOption get(); void set(System::Activities::DurableInstancing::InstanceEncodingOption value); };

public System.Activities.DurableInstancing.InstanceEncodingOption InstanceEncodingOption { get; set; }

member this.InstanceEncodingOption : System.Activities.DurableInstancing.InstanceEncodingOption with get, set

Public Property InstanceEncodingOption As InstanceEncodingOption

Property Value

InstanceEncodingOption

The possible values are "None" and "GZip". The default is "None".

Examples

The following code sample demonstrates using InstanceEncodingOption in a SqlWorkflowInstanceStore.

static void Main(string[] args)
{
    // Create service host.
    WorkflowServiceHost host = new WorkflowServiceHost(new CountingWorkflow(), new Uri(hostBaseAddress));

    // Add service endpoint.
    host.AddServiceEndpoint("ICountingWorkflow", new BasicHttpBinding(), "");

    // Define SqlWorkflowInstanceStoreBehavior:
    //   Set interval to renew instance lock to 5 seconds.
    //   Set interval to check for runnable instances to 2 seconds.
    //   Instance Store does not keep instances after it is completed.
    //   Select exponential back-off algorithm when retrying to load a locked instance.
    //   Instance state information is compressed using the GZip compressing algorithm.
    SqlWorkflowInstanceStoreBehavior instanceStoreBehavior = new SqlWorkflowInstanceStoreBehavior(connectionString);
    instanceStoreBehavior.HostLockRenewalPeriod = new TimeSpan(0, 0, 5);
    instanceStoreBehavior.RunnableInstancesDetectionPeriod = new TimeSpan(0, 0, 2);
    instanceStoreBehavior.InstanceCompletionAction = InstanceCompletionAction.DeleteAll;
    instanceStoreBehavior.InstanceLockedExceptionAction = InstanceLockedExceptionAction.AggressiveRetry;
    instanceStoreBehavior.InstanceEncodingOption = InstanceEncodingOption.GZip;
    host.Description.Behaviors.Add(instanceStoreBehavior);

    // Open service host.
    host.Open();

    // Create a client that sends a message to create an instance of the workflow.
    ICountingWorkflow client = ChannelFactory<ICountingWorkflow>.CreateChannel(new BasicHttpBinding(), new EndpointAddress(hostBaseAddress));
    client.start();

    Console.WriteLine("(Press [Enter] at any time to terminate host)");
    Console.ReadLine();
    host.Close();
}

Remarks

If the value is set to "GZip", the instance data is compressed using the GZip algorithm.