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charlessolar avatar charlessolar commented on May 26, 2024

I added a small extension IMessageHandleContext.LocalSaga to help with sending a series of commands from message handlers.

Usage is like so:

public void Handle(Commands.DoSomethingComplicated command, IMessageHandlerContext ctx) {
   var complicated = await ctx.For<Complicated>().Get(command.ComplicatedId);
   await ctx.LocalSaga(async bus => {
       var reply = await bus.Request<bool>(new Commands.StartSomething{ ComplicatedId = complicated.Id });
       complicated.Success = reply;
   });
}

awaiting ctx.LocalSaga will pause the command processing until the saga function is complete.

from aggregates.net.

charlessolar avatar charlessolar commented on May 26, 2024

Working on the feature - syntax is going to be

var saga = ctx.Saga("blah")
.Command<Commands.Allocate>(x => {
  x.Id = "blah"
})
.Command<Commands.SetName>(x => {
  x.Id= "blah";
  x.Name = "Test";
})
.Command<Commands.Activate>(x => {
  x.Id = "blah";
})
.OnAbort<Commands.SetException>(x => {
  x.Id = "blah";
});
await saga.Start();

Under the covers we'll be running a normal NSB saga which will keep track of the commands already sent and accepted. If any command is rejected the abort commands will be run in order and the originating message will be sent to the error queue

from aggregates.net.

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