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The C# Code
Let's now have a look at the main Lsp class in Listing 7.
Listing 7 The Lsp Class
namespace LspEvents
{
// The callback interface.
public interface ILspStatus
{
void GettingCongested(string msg);
void FullyCongested(string msg);
void CannotForwardData(string msg);
}
public class Lsp
{
// The set of connected sinks.
ArrayList clientSinks = new ArrayList();
// Attach to the event source.
public void Attach(ILspStatus sink)
{ clientSinks.Add(sink); }
// Detach from the event source.
public void Detach(ILspStatus sink)
{ clientSinks.Remove(sink); }
#region Internal state data
#endregion
public Lsp()
{
}
public Lsp(string lspName, int sourceNode, int destinationNode,
string path, int requiredBandwidth, int maximumBandwidth)
{
#region Constructor
#endregion
}
public void ForwardSomeData(int requiredBandwidth)
{
#region Use the LSP
#endregion
}
}
}
The Lsp class in Listing 7 includes the definition of the following:
- The callback interface with three domain-specific events
- Event sink attachment and detachment logic
- State data that describes the internal state of the LSP
- C# properties for describing the required bandwidth
- Two constructors
- A service method for forwarding data
Let's now put all the code fragments together.