/**
* Copyright 2005-2016 Red Hat, Inc.
*
* Red Hat licenses this file to you under the Apache License, version
* 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package io.fabric8.apmagent.metrics;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
public class MonitoredMethodMetrics {
protected final ApmAgentContext apmAgentContext;
private int monitorSize;
private final List<MethodMetricsProxy> proxyList = new CopyOnWriteArrayList<>();
MonitoredMethodMetrics(ApmAgentContext apmAgentContext) {
this.apmAgentContext = apmAgentContext;
}
public int getMonitorSize() {
return monitorSize;
}
public synchronized void setMonitorSize(int monitorSize) {
this.monitorSize = monitorSize;
//if we've downsized, remove
while (proxyList.size() > monitorSize) {
MethodMetricsProxy methodMetricsProxy = proxyList.get(proxyList.size() - 1);
proxyList.remove(proxyList.size() - 1);
apmAgentContext.unregisterMethodMetricsMBean(methodMetricsProxy);
}
}
public void calculateMethodMetrics(List<? extends MethodMetrics> methodMetricsList) {
if (methodMetricsList.size() < proxyList.size()) {
setMonitorSize(methodMetricsList.size());
}
if (methodMetricsList.size() > proxyList.size() && proxyList.size() < monitorSize) {
int extra = monitorSize - proxyList.size();
if (extra > 0) {
for (int i = 0; i < extra; i++) {
proxyList.add(createProxy(proxyList.size()));
}
}
}
for (int i = 0; i < methodMetricsList.size() && i < proxyList.size(); i++) {
MethodMetricsProxy methodMetricsProxy = proxyList.get(i);
if (methodMetricsProxy != null) {
methodMetricsProxy.setMethodMetrics(methodMetricsList.get(i));
}
}
}
protected MethodMetricsProxy createProxy(int rank) {
MethodMetricsProxy result = new MethodMetricsProxy();
apmAgentContext.registerMethodMetricsMBean(rank, result);
return result;
}
protected void destroy() {
for (MethodMetricsProxy methodMetricsProxy : proxyList) {
apmAgentContext.unregisterMethodMetricsMBean(methodMetricsProxy);
}
proxyList.clear();
}
}