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-;; JMX client APIs for 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)
-
-; TODO: needs an integration test
-; TODO: why full package needed for JMXConnectorFactory?
-(defmacro with-connection
- "Execute body with JMX connection specified by opts (:port)."
- [opts & body]
- `(with-open [connector# (javax.management.remote.JMXConnectorFactory/connect
- (JMXServiceURL. (jmx-url ~opts)) {})]
- (binding [*connection* (.getMBeanServerConnection connector#)]
- ~@body)))
-
-(defn mbean-info [n]
- (.getMBeanInfo *connection* (as-object-name n)))
-
-(defn raw-read
- "Read an mbean property. Returns low-level Java object model for composites, tabulars, etc.
- Most callers should use read."
- [n attr]
- (.getAttribute *connection* (as-object-name n) (as-str attr)))
-
-(defvar read
- (comp jmx->clj raw-read)
- "Read an mbean property.")
-
-(defvar read-exceptions
- [UnsupportedOperationException
- InternalError
- java.io.NotSerializableException
- java.lang.ClassNotFoundException
- javax.management.AttributeNotFoundException]
- "Exceptions that might be thrown if you try to read an unsupported attribute.
- by testing agains jconsole and Tomcat. This is dreadful and ad-hoc but I did not
- want to swallow all exceptions.")
-
-(defn read-supported
- "Calls read to read an mbean property, *returning* unsupported operation exceptions instead of throwing them.
- Used to keep mbean from blowing up. Note that some terribly-behaved mbeans use java.lang.InternalError to
- indicate an unsupported operation!"
- [n attr]
- (try
- (read n attr)
- (catch Throwable t
- (let [cause (root-cause t)]
- (if (some #(instance? % cause) read-exceptions)
- cause
- (throw t))))))
-
-(defn write! [n attr value]
- (.setAttribute
- *connection*
- (as-object-name n)
- (Attribute. (as-str attr) value)))
-
-(defn attribute-info
- "Get the MBeanAttributeInfo for an attribute"
- [object-name attr-name]
- (filter #(= (as-str attr-name) (.getName %))
- (.getAttributes (mbean-info object-name))))
-
-(defn readable?
- "Is attribute readable?"
- [n attr]
- (.isReadable () (mbean-info n)))
-
-(defn operations
- "All oeprations available on an MBean."
- [n]
- (.getOperations (mbean-info n)))
-
-(defn operation
- "The MBeanOperationInfo for operation op on mbean n. Used for invoke."
- [n op]
- (first (filter #(= (-> % .getName keyword) op) (operations n))))
-
-(defn op-param-types
- "The parameter types (as class name strings) for operation op on n. Used for invoke."
- [n op]
- (map #(-> % .getType) (.getSignature (operation n op))))
-
-