/*
* 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
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* 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 java.util.HashMap;
import java.util.LinkedList;
import org.smallmind.instrument.Metric;
public class MetricSupplier {
private static final ThreadLocal<HashMap<String, LinkedList<Metric>>> METRIC_MAP_LOCAL = new ThreadLocal<HashMap<String, LinkedList<Metric>>>() {
@Override
protected HashMap<String, LinkedList<Metric>> initialValue () {
return new HashMap<String, LinkedList<Metric>>();
}
};
public static void push (String key, Metric metric) {
HashMap<String, LinkedList<Metric>> metricMap = METRIC_MAP_LOCAL.get();
LinkedList<Metric> metricList;
if ((metricList = metricMap.get(key)) == null) {
metricMap.put(key, metricList = new LinkedList<Metric>());
}
metricList.push(metric);
}
public static void pop (String key) {
METRIC_MAP_LOCAL.get().get(key).pop();
}
public static <M extends Metric<M>> M get (String key, Class<M> metricClass) {
LinkedList<Metric> metricList;
if (((metricList = METRIC_MAP_LOCAL.get().get(key)) == null) || metricList.isEmpty()) {
throw new MissingMetricException("The metric(%s) is not locally defined", (key == null) ? "null" : key);
}
return metricClass.cast(metricList.peek());
}
}