/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project 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
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
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*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.instrument.aop;
import org.aspectj.lang.ProceedingJoinPoint;
import org.smallmind.instrument.InstrumentationManager;
import org.smallmind.instrument.Metric;
import org.smallmind.instrument.MetricProperty;
import org.smallmind.instrument.MetricRegistry;
import org.smallmind.instrument.Metrics;
import org.smallmind.nutsnbolts.reflection.aop.AOPUtility;
public abstract class MetricAspect {
private static final MetricRegistry METRIC_REGISTRY;
static {
if ((METRIC_REGISTRY = InstrumentationManager.getMetricRegistry()) == null) {
throw new ExceptionInInitializerError("No MetricRegistry instance has been registered with the MetricRegistryFactory");
}
}
public Object engage (ProceedingJoinPoint thisJoinPoint, JMX jmx, String alias, Metrics.MetricBuilder<?> metricBuilder)
throws Throwable {
Metric metric;
MetricProperty[] properties;
String supplierKey;
properties = new MetricProperty[jmx.properties().length];
for (int index = 0; index < properties.length; index++) {
properties[index] = new MetricProperty(jmx.properties()[index].key(), jmx.properties()[index].constant() ? jmx.properties()[index].value() : AOPUtility.getParameterValue(thisJoinPoint, jmx.properties()[index].value(), false).toString());
}
metric = METRIC_REGISTRY.instrument(metricBuilder, jmx.domain(), properties);
MetricSupplier.push(supplierKey = (alias.length() == 0) ? null : alias, metric);
try {
return thisJoinPoint.proceed();
}
finally {
MetricSupplier.pop(supplierKey);
}
}
}