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#aws
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2019-05-11
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kari.marttila17:05:50

A question regarding Cognitect AWS library ( https://github.com/cognitect-labs/aws-api ): This deps.edn works:

{ :deps    {org.clojure/clojure         {:mvn/version "1.10.0"}
            org.clojure/core.async      {:mvn/version "0.4.490"}
            org.clojure/data.json       {:mvn/version "0.2.6"}
            com.cognitect.aws/api       {:mvn/version "0.8.305"}
            com.cognitect.aws/endpoints {:mvn/version "1.1.11.549"}
            com.cognitect.aws/dynamodb  {:mvn/version "697.2.391.0"}
            ring/ring-core                  {:mvn/version "1.7.1"}
;;            ring/ring-jetty-adapter         {:mvn/version "1.7.1"}
            ring-cors/ring-cors             {:mvn/version "0.1.13"}
            ring/ring-json                  {:mvn/version "0.4.0"}
            ring/ring-defaults              {:mvn/version "0.3.2"}
           }
 }
But if I remove the comment away and use ring/ring-jetty-adapter dependency I get an exception:
(do (require '[clojure.core.async :as a] '[ :as io] '[clojure.data.json :as json] '[cognitect.aws.client.api :as aws] '[cognitect.aws.client.api.async :as aws.async]) (def ddb (aws/client {:api :dynamodb})) (aws/invoke ddb {:op :ListTables}) )
=>
{:cognitect.anomalies/category :cognitect.anomalies/fault, :cognitect.anomalies/message "org.eclipse.jetty.io.SelectorManager.connect(Ljava/nio/channels/SocketChannel;Ljava/lang/Object;)V", :cognitect.http-client/throwable #error {
 :cause "org.eclipse.jetty.io.SelectorManager.connect(Ljava/nio/channels/SocketChannel;Ljava/lang/Object;)V"
 :via
 [{:type java.lang.NoSuchMethodError
   :message "org.eclipse.jetty.io.SelectorManager.connect(Ljava/nio/channels/SocketChannel;Ljava/lang/Object;)V"
   :at [org.eclipse.jetty.client.AbstractHttpClientTransport connect "AbstractHttpClientTransport.java" 118]}]
 :trace
 [[org.eclipse.jetty.client.AbstractHttpClientTransport connect "AbstractHttpClientTransport.java" 118]
  [org.eclipse.jetty.client.HttpClient$1 connect "HttpClient.java" 580]
  [org.eclipse.jetty.client.HttpClient$1 succeeded "HttpClient.java" 551]
  [org.eclipse.jetty.client.HttpClient$1 succeeded "HttpClient.java" 545]
  [org.eclipse.jetty.util.SocketAddressResolver$Async lambda$resolve$1 "SocketAddressResolver.java" 181]
  [org.eclipse.jetty.util.thread.QueuedThreadPool runJob "QueuedThreadPool.java" 765]
  [org.eclipse.jetty.util.thread.QueuedThreadPool$2 run "QueuedThreadPool.java" 683]
  [java.lang.Thread run "Thread.java" 834]]}}

Sadly, this is a bit showstopper since I'm using Ring in my web app. Is it possible to use Ring together with Cognitect's AWS library? If yes, what dependencies should I use?

kari.marttila17:05:10

@seancorfield kindly told me to check the jetty versions of Cognitect's AWS library and Ring. I used clj -Stree:

com.cognitect.aws/api 0.8.305
...
  com.cognitect/http-client 0.1.87
    org.eclipse.jetty/jetty-client 9.3.7.v20160115
...
ring/ring-jetty-adapter 1.7.1
  ring/ring-servlet 1.7.1
  org.eclipse.jetty/jetty-server 9.4.12.v20180830
...
I'm just wondering how am I able to resolve this? I'm using deps.edn.

thegeez18:05:05

@kari.marttila having the same version for jetty-client and jetty-server might work:

com.cognitect.aws/api       {:mvn/version "0.8.305" :exclusions [org.eclipse.jetty/jetty-client]}
            org.eclipse.jetty/jetty-client {:mvn/version "9.4.12.v20180830"}

kari.marttila20:05:29

Ok. That's the way to do it. Thanks @thegeez ! I'll try it tomorrow!