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-;; Conversions between JMX data structures and idiomatic Clojure
-;; docs in clojure/contrib/jmx.clj!!
-
-;; by Stuart Halloway
-
-;; Copyright (c) Stuart Halloway, 2009. All rights reserved. The use
-;; and distribution terms for this software are covered by the Eclipse
-;; Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
-;; which can be found in the file epl-v10.html at the root of this
-;; distribution. By using this software in any fashion, you are
-;; agreeing to be bound by the terms of this license. You must not
-;; remove this notice, or any other, from this software.
-
-
-(in-ns 'clojure.contrib.jmx)
-
-(declare jmx->clj)
-
-(defn jmx-url
- "Build a JMX URL from options."
- ([] (jmx-url {}))
- ([overrides]
- (let [opts (merge {:host "localhost", :port "3000"} overrides)]
- (format "service:jmx:rmi:///jndi/rmi://%s:%s/jmxrmi" (opts :host) (opts :port)))))
-
-(defmulti as-object-name
- "Interpret an object as a JMX ObjectName."
- { :arglists '([string-or-name]) }
- class)
-(defmethod as-object-name String [n] (ObjectName. n))
-(defmethod as-object-name ObjectName [n] n)
-
-(defn composite-data->map [cd]
- (into {}
- (map (fn [attr] [(keyword attr) (jmx->clj (.get cd attr))])
- (.. cd getCompositeType keySet))))
-
-(defn maybe-keywordize
- "Convert a string key to a keyword, leaving other types alone. Used to
- simplify keys in the tabular data API."
- [s]
- (if (string? s) (keyword s) s))
-
-(defn maybe-atomize
- "Convert a list of length 1 into its contents, leaving other things alone.
- Used to simplify keys in the tabular data API."
- [k]
- (if (and (instance? java.util.List k)
- (= 1 (count k)))
- (first k)
- k))
-
-(defvar simplify-tabular-data-key
- (comp maybe-keywordize maybe-atomize))
-
-(defn tabular-data->map [td]
- (into {}
- ; the need for into-array here was a surprise, and may not
- ; work for all examples. Are keys always arrays?
- (map (fn [k]
- [(simplify-tabular-data-key k) (jmx->clj (.get td (into-array k)))])
- (.keySet td))))
-
-(defmulti jmx->clj
- "Coerce JMX data structures into Clojure data.
- Handles CompositeData, TabularData, maps, and atoms."
- { :argslists '([jmx-data-structure]) }
- (fn [x]
- (cond
- (instance? javax.management.openmbean.CompositeData x) :composite
- (instance? javax.management.openmbean.TabularData x) :tabular
- (instance? clojure.lang.Associative x) :map
- :default :default)))
-(defmethod jmx->clj :composite [c] (composite-data->map c))
-(defmethod jmx->clj :tabular [t] (tabular-data->map t))
-(defmethod jmx->clj :map [m] (into {} (zipmap (keys m) (map jmx->clj (vals m)))))
-(defmethod jmx->clj :default [obj] obj)
-
-(def guess-attribute-map
- {"java.lang.Integer" "int"
- "java.lang.Boolean" "boolean"
- "java.lang.Long" "long"
- })
-
-(defn guess-attribute-typename
- "Guess the attribute typename for MBeanAttributeInfo based on the attribute value."
- [value]
- (let [classname (.getName (class value))]
- (get guess-attribute-map classname classname)))
-
-(defn build-attribute-info
- "Construct an MBeanAttributeInfo. Normally called with a key/value pair from a Clojure map."
- ([attr-name attr-value]
- (build-attribute-info
- (as-str attr-name)
- (guess-attribute-typename attr-value)
- (as-str attr-name) true false false))
- ([name type desc readable? writable? is?] (MBeanAttributeInfo. name type desc readable? writable? is? )))
-
-(defn map->attribute-infos
- "Construct an MBeanAttributeInfo[] from a Clojure associative."
- [attr-map]
- (into-array (map (fn [[attr-name value]] (build-attribute-info attr-name value))
- attr-map)))