clojure.lang.LazySeq不能被转换为clojure.lang.IFn
我是Riemann和Clojure的新手。我只想在某项服务的TTL过期时向三个电子邮件组发送电子邮件通知。 我创建了某种配置文件,在其中存储电子邮件列表:clojure.lang.LazySeq不能被转换为clojure.lang.IFn,clojure,riemann,Clojure,Riemann,我是Riemann和Clojure的新手。我只想在某项服务的TTL过期时向三个电子邮件组发送电子邮件通知。 我创建了某种配置文件,在其中存储电子邮件列表: { :email_group_1 ( "first@example.com" "second@example.ru" ) :email_group_2 ( "third@example.com"
{
:email_group_1 (
"first@example.com"
"second@example.ru"
)
:email_group_2 (
"third@example.com"
)
}
我的riemann配置如下所示:
(logging/init {:console true})
(import org.apache.log4j.Level)
(logging/set-level Level/DEBUG)
(require '[clojure.java.io :as io])
(import '[java.io PushbackReader])
(let [host "0.0.0.0"]
(tcp-server {:host host :port 60001})
(udp-server {:host host})
(ws-server {:host host :port 60003}))
(repl-server {:host "127.0.0.1"})
(def cwd (System/getProperty "user.dir"))
(def emails
(with-open [r (io/reader (str cwd "/etc/emails.clj"))]
(read (PushbackReader. r))))
(periodically-expire 5)
(def email (mailer))
(defn notify [& egroups]
(for [egroup egroups]
(rollup 1 60 (apply email (emails egroup)))))
(let [index (index)]
(streams
(default :ttl 60
index
(expired
(where (service "service_connect_active")
#(info "expired" %)
(notify :email_group_1 :email_group_2))))))
代码看起来不错(对我来说),但当此服务过期时,我会出现以下错误:
09:45:39 riemann.1 | INFO [2015-05-08 10:45:39,313] Thread-5 - riemann.config - expired {:ttl 60, :time 357766884827/250, :state expired, :service service_connect_active, :host ava.local}
09:45:39 riemann.1 | WARN [2015-05-08 10:45:39,319] Thread-5 - riemann.config - clojure.lang.LazySeq@841649b8 threw
09:45:39 riemann.1 | java.lang.ClassCastException: clojure.lang.LazySeq cannot be cast to clojure.lang.IFn
09:45:39 riemann.1 | at riemann.config$eval66$stream__70$fn__75.invoke(riemann.development.config:34)
09:45:39 riemann.1 | at riemann.config$eval66$stream__70.invoke(riemann.development.config:45)
09:45:39 riemann.1 | at riemann.streams$match$stream__3514$fn__3525.invoke(streams.clj:1209)
09:45:39 riemann.1 | at riemann.streams$match$stream__3514.invoke(streams.clj:1209)
09:45:39 riemann.1 | at riemann.streams$default$stream__3731$fn__3742.invoke(streams.clj:1328)
09:45:39 riemann.1 | at riemann.streams$default$stream__3731.invoke(streams.clj:1328)
09:45:39 riemann.1 | at riemann.core$stream_BANG_$fn__4415.invoke(core.clj:19)
09:45:39 riemann.1 | at riemann.core$stream_BANG_.invoke(core.clj:18)
09:45:39 riemann.1 | at riemann.core$reaper$worker__4529$fn__4539.invoke(core.clj:303)
09:45:39 riemann.1 | at riemann.core$reaper$worker__4529.invoke(core.clj:297)
09:45:39 riemann.1 | at riemann.service.ThreadService$thread_service_runner__1973$fn__1974.invoke(service.clj:71)
09:45:39 riemann.1 | at riemann.service.ThreadService$thread_service_runner__1973.invoke(service.clj:70)
09:45:39 riemann.1 | at clojure.lang.AFn.run(AFn.java:22)
09:45:39 riemann.1 | at java.lang.Thread.run(Thread.java:745)
谁能帮帮我吗?谢谢。错误“无法转换为clojure.lang.IFn”总是指向某个期望函数被赋予的对象,而该对象不能被视为
(defn notify [& egroups]
(for [egroup egroups]
(rollup 1 60 (apply email (emails egroup)))))
这将返回生成的汇总流LazySeq的值,而不是实际流(在Riemann中,流是IFn)。所以当Riemann试图调用流作为IFn时,您的错误就会发生
比如说:
(defn notify [& egroups]
(rollup 1 60 (apply email (mapcat emails egroups))))
在这里,我们只是先将群组列表转换为电子邮件列表,然后继续我们的生活
或者,如果确实需要多个流(例如,避免共享到:行),则将它们应用于汇总
(defn notify [& egroups]
(apply rollup 1 60 (map email (map emails groups))))
希望这有帮助,我显然没有复制您的整个配置。您的Riemann配置的mailer函数来自哪里?@tnoda mailer是Riemann的公共变量。更多信息在这里我很抱歉:)我从来没有在StackOverflow问过问题,所以我不知道一些规则。由于我的网站声誉太小,我不能投票给你的答案:(但我真的很感谢你的帮助!