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Use Commanded to build your own Elixir applications following the CQRS/ES pattern.
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Files
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Files
test/example_domain/money_transfer/transfer_money_process_manager.ex
defmodule Commanded.ExampleDomain.TransferMoneyProcessManager do
@behaviour Commanded.ProcessManagers.ProcessManager
defstruct [
transfer_uuid: nil,
debit_account: nil,
credit_account: nil,
amount: nil,
status: nil
]
alias Commanded.ExampleDomain.TransferMoneyProcessManager
alias Commanded.ExampleDomain.MoneyTransfer.Events.{MoneyTransferRequested}
alias Commanded.ExampleDomain.BankAccount.Events.{MoneyDeposited,MoneyWithdrawn}
alias Commanded.ExampleDomain.BankAccount.Commands.{DepositMoney,WithdrawMoney}
def interested?(%MoneyTransferRequested{transfer_uuid: transfer_uuid}), do: {:start, transfer_uuid}
def interested?(%MoneyWithdrawn{transfer_uuid: transfer_uuid}), do: {:continue, transfer_uuid}
def interested?(%MoneyDeposited{transfer_uuid: transfer_uuid}), do: {:continue, transfer_uuid}
def interested?(_event), do: false
def handle(%TransferMoneyProcessManager{}, %MoneyTransferRequested{transfer_uuid: transfer_uuid, debit_account: debit_account, amount: amount}) do
%WithdrawMoney{account_number: debit_account, transfer_uuid: transfer_uuid, amount: amount}
end
def handle(%TransferMoneyProcessManager{transfer_uuid: transfer_uuid, credit_account: credit_account, amount: amount}, %MoneyWithdrawn{}) do
%DepositMoney{account_number: credit_account, transfer_uuid: transfer_uuid, amount: amount}
end
def handle(%TransferMoneyProcessManager{}, %MoneyDeposited{}), do: []
## state mutators
def apply(%TransferMoneyProcessManager{} = transfer, %MoneyTransferRequested{transfer_uuid: transfer_uuid, debit_account: debit_account, credit_account: credit_account, amount: amount}) do
%TransferMoneyProcessManager{transfer |
transfer_uuid: transfer_uuid,
debit_account: debit_account,
credit_account: credit_account,
amount: amount,
status: :withdraw_money_from_debit_account
}
end
def apply(%TransferMoneyProcessManager{} = transfer, %MoneyWithdrawn{}) do
%TransferMoneyProcessManager{transfer |
status: :deposit_money_in_credit_account
}
end
def apply(%TransferMoneyProcessManager{} = transfer, %MoneyDeposited{}) do
%TransferMoneyProcessManager{transfer |
status: :transfer_complete
}
end
end