Hi all,
I'm trying to understand using actors with the routing DSL. How do I
complete using the routing DSL given an actor that I'm asking and may
return different responses? Here's the code:
*object RestApiJsonProtocols extends DefaultJsonProtocol with
SprayJsonSupport {*
* implicit val jfAmount = jsonFormat1(Amount)*
* implicit val jfOpenAccount = jsonFormat2(OpenAccount)*
* implicit val jfDeposit = jsonFormat2(Deposit)*
* implicit val jfWithdraw = jsonFormat2(Withdraw)*
* implicit val jfGetBalance = jsonFormat1(GetBalance)*
* implicit val jfTransfer = jsonFormat3(Transfer)*
* implicit val jfGetAccounts = jsonFormat0(GetAccounts)*
* implicit val jfBalance = jsonFormat2(Balance)*
* implicit val jfAccounts = jsonFormat1(Accounts)*
* implicit val jfTransferResult = jsonFormat4(TransferResult)*
* implicit val jfNoSuchAccount = jsonFormat2(NoSuchAccount)*
* implicit val jfAccountAlreadyExists = jsonFormat2(AccountAlreadyExists)*
* implicit val jfInsufficientFunds = jsonFormat3(InsufficientFunds)*
*}*
* import RestApiJsonProtocols._*
* val myRoute =*
* path("accounts") {*
* post {*
* entity(as[OpenAccount]) { oa =>*
* complete {*
* (bank ? oa) onSuccess { **// "bank" is an Actor*
* case b: Balance => b // WRONG*
* case x: AccountAlreadyExists => x // WRONG*
* }*
* }*
* } ~*
* entity(as[Transfer]) { t =>*
* complete {*
* (bank ? t) onSuccess { **// "bank" is an Actor*
* case tr: TransferResult => tr // WRONG*
* case nsax: NoSuchAccount => nsax** // WRONG*
* case ifx: InsufficientFunds => ifx** // WRONG*
* }*
* }*
* }*
* } ~*
* get {*
* complete((bank ? GetAccounts()).mapTo[Accounts]) // RIGHT!*
* }*
* }*
I don't know what the right magical incantation is but here are my current
compilation errors.
*> compile*
*[info] Compiling 3 Scala sources to
/Users/matthew/Documents/github/payment-flow/solution/target/scala-2.11/classes...*
*[error]
/Users/matthew/Documents/github/payment-flow/solution/src/main/scala/com/demo/akka/http/Rest.scala:53:
could not find implicit value for parameter um:
akka.http.scaladsl.unmarshalling.FromRequestUnmarshaller[com.demo.akka.http.BankCommands.OpenAccount]*
*[error] entity(as[OpenAccount]) { oa =>*
*[error] ^*
*[error]
/Users/matthew/Documents/github/payment-flow/solution/src/main/scala/com/demo/akka/http/Rest.scala:55:
type mismatch;*
*[error] found : Unit*
*[error] required: akka.http.scaladsl.marshalling.ToResponseMarshallable*
*[error] (bank ? oa) onSuccess {*
*[error] ^*
*[error]
/Users/matthew/Documents/github/payment-flow/solution/src/main/scala/com/demo/akka/http/Rest.scala:61:
could not find implicit value for parameter um:
akka.http.scaladsl.unmarshalling.FromRequestUnmarshaller[com.demo.akka.http.BankCommands.Transfer]*
*[error] entity(as[Transfer]) { t =>*
*[error] ^*
*[error]
/Users/matthew/Documents/github/payment-flow/solution/src/main/scala/com/demo/akka/http/Rest.scala:63:
type mismatch;*
*[error] found : Unit*
*[error] required: akka.http.scaladsl.marshalling.ToResponseMarshallable*
*[error] (bank ? t) onSuccess {*
*[error] ^*
*[error] four errors found*
*[error] (compile:compile) Compilation failed*
*[error] Total time: 1 s, completed Sep 9, 2015 6:30:19 PM*
As you can see from the route, if an OpenAccount message is POSTed to
/accounts I use ask to send the actor (bank) the OpenAccount message. It
responds with either a Balance or AccountAlreadyExists message. If a
Transfer message is POSTed to /accounts, I use ask to send the actor the
Transfer message, which responds with either TransferResult, NoSuchAccount,
or InsufficientFunds message. In either case, I want to send the message
that the actor responds with back to the client as JSON.
The GET directive's content shows no errors (in Scala IDE or IntelliJ) and
is inspired by https://groups.google.com/forum/#!topic/akka-dev/ei-0OzzgKd0
which I felt lucky to find.
I'm kind of on the clock on this one and could use some help.
Thanks,
Matthew
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