ConstantWriter

ConstantWriter is a writer that always writes the same value or reference.

// Create constant writer
IWriterBase<Avalanche.Void, string> constantWriter =
    (IWriterBase<Avalanche.Void, string>)
    ConstantWriter.Create(typeof(Avalanche.Void), typeof(string), "Hello");
// Read constant
string str = constantWriter.Read();
// Print
WriteLine(str);

ConstantWriterRequest(fromType, toType, value) is request for ConstantWriter.

// Create request
IRequest request = new ConstantWriterRequest(typeof(Avalanche.Void), typeof(string), "Hello");
// Create constant writer
IWriterBase<Avalanche.Void, string> constantWriter =
    Services.Create(Avalanche.Accessor.Dto.Module.Instance, CachePolicies.Default).GetRequired<IRequest, IWriterBase<Avalanche.Void, string>>(request);
// Read constant
string str = constantWriter.Read();
// Print
WriteLine(str);

Full Example

Full example

using Avalanche.Accessor;
using Avalanche.Service;
using Avalanche.Writer;
using static System.Console;

class constantwriter
{
    public static void Run()
    {
        {
            // <01>
            // Create constant writer
            IWriterBase<Avalanche.Void, string> constantWriter =
                (IWriterBase<Avalanche.Void, string>)
                ConstantWriter.Create(typeof(Avalanche.Void), typeof(string), "Hello");
            // Read constant
            string str = constantWriter.Read();
            // Print
            WriteLine(str);
            // </01>
        }

        {
            // <02>
            // Create request
            IRequest request = new ConstantWriterRequest(typeof(Avalanche.Void), typeof(string), "Hello");
            // Create constant writer
            IWriterBase<Avalanche.Void, string> constantWriter =
                Services.Create(Avalanche.Accessor.Dto.Module.Instance, CachePolicies.Default).GetRequired<IRequest, IWriterBase<Avalanche.Void, string>>(request);
            // Read constant
            string str = constantWriter.Read();
            // Print
            WriteLine(str);
            // </02>
        }

        {
            // <03>
            // Create request
            IRequest request = new ConstantWriterRequest(typeof(Avalanche.Void), typeof(string), "Hello");
            // Create constant writer
            IWriterBase<Avalanche.Void, string> constantWriter =
                Services.Create(Avalanche.Accessor.Dto.Module.Instance, CachePolicies.Default).GetRequired<IRequest, IWriterBase<Avalanche.Void, string>>(request);
            // Read constant
            string str = constantWriter.Read();
            // Print
            WriteLine(str);
            // </03>
        }
        {
            // <04>
            // Create request
            IRequest request = new ConstantWriterRequest(typeof(Avalanche.Void), typeof(object), null);
            // Create constant writer
            IWriterBase<Avalanche.Void, object> constantWriter =
                Services.Create(Avalanche.Accessor.Dto.Module.Instance, CachePolicies.Default).GetRequired<IRequest, IWriterBase<Avalanche.Void, object>>(request);
            // Read constant
            object str = constantWriter.Read();
            // Print
            WriteLine(str);
            // </04>
        }

        {
            // <05>
            // Create request
            IRequest request = new ConstantWriterRequest(typeof(Avalanche.Void), typeof(string), null);
            // Create constant writer
            IWriterBase<Avalanche.Void, string> constantWriter =
                Services.Create(Avalanche.Accessor.Dto.Module.Instance, CachePolicies.Default).GetRequired<IRequest, IWriterBase<Avalanche.Void, string>>(request);
            // Read constant
            string str = constantWriter.Read();
            // Print
            WriteLine(str);
            // </05>
        }
    }
}