不能使用joplin迁移Cassandra

Question

我正在尝试使用乔普林为我的Cassandra数据库运行迁移。但是，当我运行lein migrate dev时，我会得到以下异常：

Migrating #joplin.cassandra.database.CassandraDatabase{:hosts [127.0.0.1:9042], :keyspace test} 

Exception in thread "main" java.lang.IllegalArgumentException: No matching ctor found for class com.datastax.driver.core.policies.DCAwareRoundRobinPolicy, compiling:(clojurewerkz/cassaforte/policies.clj:38:3)

我认为问题可能在于我的迁移，但我不知道我做错了什么。

project.clj

(defproject app "0.1.0"
:dependencies [[org.clojure/clojure "1.8.0"]
             [clojurewerkz/cassaforte "3.0.0-alpha1"]

             [joplin.core "0.3.10"]
             [joplin.cassandra "0.3.10"]

             [cc.qbits/alia "4.2.3"]
             [cc.qbits/hayt "4.0.2"]
             ]

:main app.cli.core

:source-paths ["src"]

:resource-paths ["resources"]

:test-paths ["test"]

:profiles {:uberjar {:aot :all}}

:aliases {"migrate" ["run" "-m" "joplin.alias/migrate" "config.edn"]
        "seed" ["run" "-m" "joplin.alias/seed" "config.edn"]
        "rollback" ["run" "-m" "joplin.alias/rollback" "config.edn"]
        "reset" ["run" "-m" "joplin.alias/reset" "config.edn"]
        "pending" ["run" "-m" "joplin.alias/pending" "config.edn"]
        "create" ["run" "-m" "joplin.alias/create" "config.edn"]}
)

config.edn

{:migrators    {:cass-mig "resources/migrators"}
:seeds        {:cass-seed "seeds.cass/run"}
:databases    {:cass-dev {:type :cass, :hosts ["127.0.0.1:9042"], 
:keyspace "test"}}
:environments {:dev [{:db :cass-dev, :migrator :cass-mig, :seed :cass-seed}]}}

迁徙者

(ns migrators.20180717174605-test
  (:use [joplin.cassandra.database])
  (:require [clojurewerkz.cassaforte.client :as client]
[clojurewerkz.cassaforte.cql :refer :all]))

(defn up [db]
  (let [conn (client/connect (:hosts db))]
    (create-keyspace conn "test")))

(defn down [db]
  (let [conn (client/connect (:hosts db))]
    (drop-keyspace conn "test")))

Answer 1

对于joplin 0.3.9+，使用alia & hayt代替cassaforte，参见change doc 这里。

Answer 2

问题是cc.qbits/alia依赖于Cassandra驱动程序3.5.0，而版本3.0.0-alpha1 1的cassaforte依赖于较早的版本- 2.1.6。看起来，alia的依赖遮挡了cassaforte，并且找不到DCAware策略的构造函数(在驱动程序3.x中，构建器被使用而不是直接构造函数)。

您可以从存储库中安装cassaforte -它是用于3.x驱动程序的。