ETLBox
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Multicast
This article contains example code that shows the usage of the Multicast component.
Broadcast data
This example shows how a Multicast can be used to broadcast data into multiple outputs.
public class MyRow
{
public int Id { get; set; }
public string Value { get; set; }
}
public void SimpleMulticast() {
var source = new MemorySource<MyRow>();
source.DataAsList.Add(new MyRow() { Id = 1, Value = "A" });
source.DataAsList.Add(new MyRow() { Id = 2, Value = "B" });
var dest1 = new MemoryDestination<MyRow>();
var dest2 = new MemoryDestination<MyRow>();
var multicast = new Multicast<MyRow>();
source.LinkTo(multicast);
multicast.LinkTo(dest1);
multicast.LinkTo(dest2);
Network.Execute(source);
Console.WriteLine($"Destination 1");
foreach (var row in dest1.Data)
Console.WriteLine($"{row.Id}{row.Value}");
Console.WriteLine($"Destination 2");
foreach (var row in dest2.Data)
Console.WriteLine($"{row.Id}{row.Value}");
//Outputs
//Destination 1
//1A
//2B
//Destination 2
//1A
//2B
}Splitting data without Multicast
The following example shows how data can be split up in dataflow. There is no need to use a Multicast when send rows into different parts of a dataflow.
Note
Make sure when using predicates that always all rows arrive at any kind of destination. Use a
VoidDestination for records that you don't want to keep, or use the third parameter of the LinkTo method.public class MyRow
{
public int Id { get; set; }
public string Value { get; set; }
}
public void SplittingData() {
var source = new MemorySource<MyRow>();
source.DataAsList.Add(new MyRow() { Id = 1, Value = "A" });
source.DataAsList.Add(new MyRow() { Id = 2, Value = "B" });
var dest1 = new MemoryDestination<MyRow>();
var dest2 = new MemoryDestination<MyRow>();
source.LinkTo(dest1, row => row.Id <= 1);
source.LinkTo(dest2, row => row.Id >= 2);
Network.Execute(source);
Console.WriteLine($"Destination 1");
foreach (var row in dest1.Data)
Console.WriteLine($"{row.Id}{row.Value}");
Console.WriteLine($"Destination 2");
foreach (var row in dest2.Data)
Console.WriteLine($"{row.Id}{row.Value}");
//Outputs
//Destination 1
//1A
//Destination 2
//2B
}