Skip to main content
summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat (limited to 'jetty-monitor/src/main/java/org/eclipse/jetty/monitor/triggers/RangeAttrEventTrigger.java')
-rw-r--r--jetty-monitor/src/main/java/org/eclipse/jetty/monitor/triggers/RangeAttrEventTrigger.java100
1 files changed, 100 insertions, 0 deletions
diff --git a/jetty-monitor/src/main/java/org/eclipse/jetty/monitor/triggers/RangeAttrEventTrigger.java b/jetty-monitor/src/main/java/org/eclipse/jetty/monitor/triggers/RangeAttrEventTrigger.java
new file mode 100644
index 0000000000..7810c0fe3b
--- /dev/null
+++ b/jetty-monitor/src/main/java/org/eclipse/jetty/monitor/triggers/RangeAttrEventTrigger.java
@@ -0,0 +1,100 @@
+//
+// ========================================================================
+// Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
+// ------------------------------------------------------------------------
+// All rights reserved. This program and the accompanying materials
+// are made available under the terms of the Eclipse Public License v1.0
+// and Apache License v2.0 which accompanies this distribution.
+//
+// The Eclipse Public License is available at
+// http://www.eclipse.org/legal/epl-v10.html
+//
+// The Apache License v2.0 is available at
+// http://www.opensource.org/licenses/apache2.0.php
+//
+// You may elect to redistribute this code under either of these licenses.
+// ========================================================================
+//
+
+package org.eclipse.jetty.monitor.triggers;
+
+import javax.management.MalformedObjectNameException;
+
+
+/* ------------------------------------------------------------ */
+/**
+ * RangeAttrEventTrigger
+ *
+ * Event trigger that polls a value of an MXBean attribute and
+ * checks if it is in a range from specified min value to
+ * specified max value.
+ */
+public class RangeAttrEventTrigger<TYPE extends Comparable<TYPE>> extends AttrEventTrigger<TYPE>
+{
+ protected final TYPE _min;
+ protected final TYPE _max;
+
+ /* ------------------------------------------------------------ */
+ /**
+ * Construct event trigger and specify the MXBean attribute
+ * that will be polled by this event trigger as well as min
+ * and max value of the attribute.
+ *
+ * @param objectName object name of an MBean to be polled
+ * @param attributeName name of an MBean attribute to be polled
+ * @param min minimum value of the attribute
+ * @param max maximum value of the attribute
+ *
+ * @throws MalformedObjectNameException
+ * @throws IllegalArgumentException
+ */
+ public RangeAttrEventTrigger(String objectName, String attributeName,TYPE min, TYPE max)
+ throws MalformedObjectNameException, IllegalArgumentException
+ {
+ super(objectName,attributeName);
+
+ if (min == null)
+ throw new IllegalArgumentException("Value cannot be null");
+ if (max == null)
+ throw new IllegalArgumentException("Value cannot be null");
+
+ _min = min;
+ _max = max;
+ }
+
+ /* ------------------------------------------------------------ */
+ /**
+ * Compare the value of the MXBean attribute being polling
+ * to check if it is in a range from specified min value to
+ * specified max value.
+ *
+ * @see org.eclipse.jetty.monitor.triggers.AttrEventTrigger#match(java.lang.Comparable)
+ */
+ @Override
+ public boolean match(Comparable<TYPE> value)
+ {
+ return (value.compareTo(_min) > 0) &&(value.compareTo(_max) < 0);
+ }
+
+ /* ------------------------------------------------------------ */
+ /**
+ * Returns the string representation of this event trigger
+ * in the format "min<name<max".
+ *
+ * @return string representation of the event trigger
+ *
+ * @see java.lang.Object#toString()
+ */
+ public String toString()
+ {
+ StringBuilder result = new StringBuilder();
+
+ result.append(_min);
+ result.append("<");
+ result.append(getNameString());
+ result.append("<");
+ result.append(_max);
+
+ return result.toString();
+ }
+}

Back to the top