[jboss-cvs] JBossAS SVN: r77461 - trunk/tomcat/src/main/org/jboss/web/tomcat/service/modcluster/load/metric/impl.

[jboss-cvs-commits at lists.jboss.org]

Author: pferraro
Date: 2008-08-25 19:03:26 -0400 (Mon, 25 Aug 2008)
New Revision: 77461

Added:
   trunk/tomcat/src/main/org/jboss/web/tomcat/service/modcluster/load/metric/impl/MBeanAttributeLoadMetric.java
   trunk/tomcat/src/main/org/jboss/web/tomcat/service/modcluster/load/metric/impl/MBeanAttributeRatioLoadMetric.java
Log:
Base implementations for generic mbean attribute aggregation-based load metrics

Added: trunk/tomcat/src/main/org/jboss/web/tomcat/service/modcluster/load/metric/impl/MBeanAttributeLoadMetric.java
===================================================================
--- trunk/tomcat/src/main/org/jboss/web/tomcat/service/modcluster/load/metric/impl/MBeanAttributeLoadMetric.java	                        (rev 0)
+++ trunk/tomcat/src/main/org/jboss/web/tomcat/service/modcluster/load/metric/impl/MBeanAttributeLoadMetric.java	2008-08-25 23:03:26 UTC (rev 77461)
@@ -0,0 +1,62 @@
+/*
+ * JBoss, Home of Professional Open Source.
+ * Copyright 2008, Red Hat Middleware LLC, and individual contributors
+ * as indicated by the @author tags. See the copyright.txt file in the
+ * distribution for a full listing of individual contributors.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
+package org.jboss.web.tomcat.service.modcluster.load.metric.impl;
+
+import java.util.List;
+
+import javax.management.JMException;
+
+/**
+ * Generic {@link LoadMetric} whose load is the aggregated value of an mbean attribute.
+ * @author Paul Ferraro
+ */
+public class MBeanAttributeLoadMetric extends AbstractLoadMetric
+{
+   private final MBeanQueryLoadMetricSource source;
+   private final String attribute;
+   
+   protected MBeanAttributeLoadMetric(MBeanQueryLoadMetricSource source, String attribute)
+   {
+      this.source = source;
+      this.attribute = attribute;
+      
+      this.source.add(this);
+   }
+   
+   /**
+    * @{inheritDoc}
+    * @see org.jboss.web.tomcat.service.modcluster.load.metric.LoadMetric#getLoad()
+    */
+   public double getLoad() throws JMException
+   {
+      double load = 0;
+      
+      List<Number> results = this.source.getAttributes(this.attribute, Number.class);
+      
+      for (Number result: results)
+      {
+         load += result.doubleValue();
+      }
+      
+      return load;
+   }
+}

Added: trunk/tomcat/src/main/org/jboss/web/tomcat/service/modcluster/load/metric/impl/MBeanAttributeRatioLoadMetric.java
===================================================================
--- trunk/tomcat/src/main/org/jboss/web/tomcat/service/modcluster/load/metric/impl/MBeanAttributeRatioLoadMetric.java	                        (rev 0)
+++ trunk/tomcat/src/main/org/jboss/web/tomcat/service/modcluster/load/metric/impl/MBeanAttributeRatioLoadMetric.java	2008-08-25 23:03:26 UTC (rev 77461)
@@ -0,0 +1,75 @@
+/*
+ * JBoss, Home of Professional Open Source.
+ * Copyright 2008, Red Hat Middleware LLC, and individual contributors
+ * as indicated by the @author tags. See the copyright.txt file in the
+ * distribution for a full listing of individual contributors.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
+package org.jboss.web.tomcat.service.modcluster.load.metric.impl;
+
+import java.util.List;
+
+import javax.management.JMException;
+
+import org.jboss.web.tomcat.service.modcluster.load.metric.LoadMetric;
+
+/**
+ * Generic {@link LoadMetric} whose load is the ratio of 2 aggregated mbean attributes.
+ * @author Paul Ferraro
+ */
+public class MBeanAttributeRatioLoadMetric extends AbstractLoadMetric
+{
+   private final MBeanQueryLoadMetricSource source;
+   private final String dividendAttribute;
+   private final String divisorAttribute;
+   
+   protected MBeanAttributeRatioLoadMetric(MBeanQueryLoadMetricSource source, String currentAttribute, String maxAttribute)
+   {
+      this.source = source;
+      this.dividendAttribute = currentAttribute;
+      this.divisorAttribute = maxAttribute;
+      
+      this.source.add(this);      
+   }
+   
+   /**
+    * @{inheritDoc}
+    * @see org.jboss.web.tomcat.service.modcluster.load.metric.LoadMetric#getLoad()
+    */
+   public double getLoad() throws JMException
+   {
+      double dividend = 0;
+      
+      List<Number> results = this.source.getAttributes(this.dividendAttribute, Number.class);
+      
+      for (Number result: results)
+      {
+         dividend += result.doubleValue();
+      }
+      
+      double divisor = 0;
+      
+      results = this.source.getAttributes(this.divisorAttribute, Number.class);
+      
+      for (Number result: results)
+      {
+         divisor += result.doubleValue();
+      }
+      
+      return dividend / divisor;
+   }
+}