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/*-
* ============LICENSE_START=======================================================
* onap
* ================================================================================
* Copyright (C) 2016 - 2017 ONAP
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.onap.ccsdk.sli.core.dblib.pm;
import java.util.Iterator;
import java.util.Properties;
import java.util.Set;
import java.util.Timer;
import java.util.TimerTask;
import java.util.TreeSet;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.atomic.AtomicLong;
public class PollingWorker implements Runnable {
private Logger LOGGER = LoggerFactory.getLogger(PollingWorker.class);
private static PollingWorker self = null;
private LinkedBlockingQueue tasks = new LinkedBlockingQueue(100);
private long interval = 1000L;
private Thread worker = null;
private AtomicLong[] counters = null;
private int[] bucketUnit = null;
private static boolean enabled = false;
private Timer timer = null;
public static void post(long starttime){
PollingWorker temp = self;
if(temp != null && enabled) {
temp.register(new TestSample(starttime));
}
}
public static void createInistance(Properties props){
self = new PollingWorker(props);
}
private PollingWorker(Properties ctxprops){
if(ctxprops==null || ctxprops.getProperty("org.onap.ccsdk.dblib.pm") == null){
enabled = false;
} else {
if("true".equalsIgnoreCase((String)ctxprops.getProperty("org.onap.ccsdk.dblib.pm"))){
enabled = true;
} else {
enabled = false;
}
}
interval = Long.parseLong(( ctxprops == null || ctxprops.getProperty("org.onap.ccsdk.dblib.pm.interval") == null) ? "60" : (String)ctxprops.getProperty("org.onap.ccsdk.dblib.pm.interval"));
// '0' bucket is to count exceptions
String sampling[] = ((ctxprops == null || ctxprops.getProperty("org.onap.ccsdk.dblib.pm.sampling")==null) ? "0,2,5,10,20,50,100" : (String)ctxprops.getProperty("org.onap.ccsdk.dblib.pm.sampling")).split(",");
if(enabled){
bucketUnit = new int[sampling.length];
for(int i=0, max = bucketUnit.length; i<max; i++){
bucketUnit[i] = Integer.parseInt(sampling[i].trim());
}
counters = new AtomicLong[bucketUnit.length+1];
for(int i=0, max = counters.length; i<max; i++){
counters[i] = new AtomicLong();
}
worker = new Thread(this);
worker.setDaemon(true);
worker.start();
timer = new Timer(true);
timer.schedule(new MyTimerTask(), interval*1000L, interval*1000L);
}
}
private void register(TestSample object){
try {
tasks.add(object);
} catch(Throwable exc) {
// if cannot add an object to the queue, do nothing
}
}
private void deRegister(TestSample object){
tasks.remove(object);
}
@Override
public void run() {
for(;;){
Set data = new TreeSet();
tasks.drainTo(data);
for(Iterator it = data.iterator(); it.hasNext(); ){
Object next = it.next();
if(next instanceof TestSample){
consume((TestSample)next);
} else {
System.out.println(next.getClass().getName());
}
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public void clearReqister(){
AtomicLong[] tmp = new AtomicLong[counters.length];
for(int i=0, max = tmp.length; i<max; i++){
tmp[i] = new AtomicLong();
}
AtomicLong[] tmp2 = counters;
synchronized(tmp2){
counters = tmp;
}
StringBuffer sb = new StringBuffer("CPM: ");
for(int i=0, max = tmp2.length; i < max; i++){
if(i==0 && bucketUnit[0]==0){
sb.append("[Exc]=");
} else {
sb.append("[");
if(i==bucketUnit.length){
sb.append("Other]=");
} else {
sb.append(bucketUnit[i]).append(" ms]=");
}
}
sb.append(tmp2[i].get()).append("\t");
}
LOGGER.info(sb.toString());
}
class MyTimerTask extends TimerTask{
@Override
public void run() {
clearReqister();
}
}
private void consume(TestSample probe) {
AtomicLong[] tmp = counters;
synchronized(tmp){
counters[getBucket(probe.getDuration())].incrementAndGet();
}
}
/*
* This method is used to find the offset of the bucket in
* counters. 'counters' array is 1 size longer than bucketUnit,
* hence by default it returns 'bucketUnit.length'
*/
private int getBucket(long difftime){
for(int i=0; i<bucketUnit.length; i++){
if(difftime < bucketUnit[i]){
return i;
}
}
return bucketUnit.length;
}
private static boolean isEnabled() {
return enabled;
}
/**
* @author Rich Tabedzki
* A helper class to pass measured parameter to the counter.
*/
static class TestSample implements Comparable{
private long starttime;
private long endtime;
public TestSample(long starttime) {
this.endtime = System.currentTimeMillis();
this.starttime = starttime;
}
public long getDuration(){
return endtime - starttime;
}
@Override
public int compareTo(Object o) {
if(o instanceof TestSample){
TestSample x = (TestSample)o;
if(starttime < x.starttime)
return 1;
if(endtime < x.endtime)
return 1;
if(starttime > x.starttime)
return -1;
if(endtime > x.endtime)
return -1;
return 0;
}
return 1;
}
}
}
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