public CommandHandlingSettings(
[NotNull] ICommandHandlerResolver handlerResolver,
[NotNull] ResolveCommandType resolveCommandType)
{
Condition.Requires(handlerResolver, "handlerResolver").IsNotNull();
Condition.Requires(resolveCommandType, "ResolveCommandType").IsNotNull();
_handlerResolver = handlerResolver;
_resolveCommandType = resolveCommandType;
}
public CommandHandlingSettings(
[NotNull] ICommandHandlerResolver handlerResolver,
[NotNull] ResolveCommandType resolveCommandType)
{
Ensure.That(handlerResolver, "handlerResolver").IsNotNull();
Ensure.That(resolveCommandType, "ResolveCommandType").IsNotNull();
_handlerResolver = handlerResolver;
_resolveCommandType = resolveCommandType;
_deserializeCommand = CatchDeserializationExceptions(
(commandReader, type) =>
{
var body = commandReader.ReadToEnd(); // Will cause LOH problems if command json > 85KB
return(SimpleJson.DeserializeObject(body, type, CommandClient.JsonSerializerStrategy));
});
}
public CommandHandlingSettings(
[NotNull] ICommandHandlerResolver handlerResolver,
[NotNull] ResolveCommandType resolveCommandType)
{
Ensure.That(handlerResolver, "handlerResolver").IsNotNull();
Ensure.That(resolveCommandType, "ResolveCommandType").IsNotNull();
_handlerResolver = handlerResolver;
_resolveCommandType = resolveCommandType;
_deserializeCommand = CatchDeserializationExceptions(
(commandReader, type) =>
{
var body = commandReader.ReadToEnd(); // Will cause LOH problems if command json > 85KB
return SimpleJson.DeserializeObject(body, type, CommandClient.JsonSerializerStrategy);
});
}
static void Main()
{
var resolver = new CommandHandlerResolver(new CommandModule());
// 1. Create a map to resolve types from a key.
// This could of course be done with reflection + conventions.
// For the sake of example, we're going to be explict.
var commandMap = new[]
{
typeof(CommandVersioning.V1.Command),
typeof(CommandVersioning.V2.Command),
}.ToDictionary(t => t.Name.ToLowerInvariant(), t => t);
var resolveCommandType = new ResolveCommandType((typeName, version) =>
{
// 2. In this example, we're not handling unversioned commands. You
// may of course handle them.
if (version == null)
{
return(null); // 3. Return null if the command type can't be resolved.
}
// 4. Here we're just converting the typeName to a key that matches our
// convetion.
var typeNameSegments = typeName.Split('.').ToList(); // my.type.name -> { my, type, name }
typeNameSegments.Insert(typeNameSegments.Count - 1, "v" + version); // { my, type, name } -> { my, type, vX, name }
typeName = string.Join(".", typeNameSegments); // { my, type, vX, name } -> my.type.vX.name
Type commandType;
commandMap.TryGetValue(typeName, out commandType);
return(commandType);
});
// 5. CommandHandlingSettings has a contructor overload to pass in the command type resolver.
var settings = new CommandHandlingSettings(resolver, resolveCommandType);
}
