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Use Commanded to build your own Elixir applications following the CQRS/ES pattern.
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Files
test/commands/support/consistency/eventually_consistent_event_handler.ex
defmodule Commanded.Commands.EventuallyConsistentEventHandler do
use Commanded.Event.Handler,
name: "EventuallyConsistentEventHandler",
consistency: :eventual
alias Commanded.Commands.{
ConsistencyAggregateRoot,
ConsistencyRouter,
}
alias ConsistencyAggregateRoot.{
ConsistencyCommand,
ConsistencyEvent,
DispatchRequestedEvent,
}
def handle(%ConsistencyEvent{}, _metadata) do
:timer.sleep(:infinity) # simulate slow event handler
:ok
end
# handle event by dispatching a command
def handle(%DispatchRequestedEvent{uuid: uuid, delay: delay}, _metadata) do
ConsistencyRouter.dispatch(%ConsistencyCommand{uuid: uuid, delay: delay})
end
end