package com.suntrust;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.LongAdder;
import java.text.DecimalFormat;
import java.lang.Boolean;
class FlexShipmentIdentificationProcessor{
//static initializer for one time initialization
static{
flexShipmentIdentificationProcessor= new FlexShipmentIdentificationProcessor();
flexTracker = new ConcurrentHashMap<String,FlexCounters>();
myThreadLocalCache = new ThreadLocal<Boolean>();
}
private static final ThreadLocal<Boolean> myThreadLocalCache;
final static FlexShipmentIdentificationProcessor flexShipmentIdentificationProcessor;
final static ConcurrentHashMap<String,FlexCounters> flexTracker;
public static void main(String []args){
String accountKey = "ACCNT1";
boolean flexed;
for(int incomingLetterCount=1;incomingLetterCount<=200;incomingLetterCount++){
flexed = FlexShipmentIdentificationProcessor.process(accountKey);
}
}
public static boolean process(String accountKey){
flexTracker.computeIfAbsent(accountKey,k -> initializeAccountFlexCounter(accountKey));
flexTracker.computeIfPresent(accountKey,(k,V) -> flexShipmentIdentificationProcessor.computePercentageIncrementCounter(accountKey,flexTracker));
boolean toBeflexed = myThreadLocalCache.get().booleanValue();
System.out.println(toBeflexed?"------- Flexed":"----- Not to be Flexed");
return toBeflexed;
}
private static FlexCounters initializeAccountFlexCounter(String accountKey){
System.out.println("Initializing for Account:"+accountKey);
return new FlexCounters();
}
private static FlexCounters computePercentageIncrementCounter(String accountKey, ConcurrentHashMap<String,FlexCounters> flexTracker) {
DecimalFormat df = new DecimalFormat("#.00");
double currentPercentage = 0, currentCount = 0, totalLetter = 0;
double thresholdPercentage = 15.0;
FlexCounters currentAccountFlexCounter = flexTracker.get(accountKey);
currentCount = currentAccountFlexCounter.getCurrentCount()+1;
totalLetter = currentAccountFlexCounter.getTotalCount()+1;
currentPercentage=currentCount/totalLetter*100;
if( currentPercentage<= thresholdPercentage)
{
currentAccountFlexCounter.incrementCurrentAndTotalCount();
//set flex state in threadLocal cache
myThreadLocalCache.set(Boolean.TRUE);
System.out.print("current Percentage " + df.format(currentPercentage));
System.out.print(" currentCount:" + (currentAccountFlexCounter.getCurrentCount()));
System.out.print(" totalLetter:"+(currentAccountFlexCounter.getTotalCount()));
}else{
currentAccountFlexCounter.incrementTotalCount();
//set flex state in threadLocal cache
myThreadLocalCache.set(Boolean.FALSE);
System.out.print("current Percentage " + df.format(currentPercentage));
System.out.print(" currentCount:" + (currentAccountFlexCounter.getCurrentCount()));
System.out.print(" totalLetter:"+ (currentAccountFlexCounter.getTotalCount()));
}
return currentAccountFlexCounter;
}
}
class FlexCounters{
private LongAdder currentCount;
private LongAdder totalCount;
//default contructor populates both LongAdders
public FlexCounters(){
currentCount = new LongAdder();
totalCount = new LongAdder();
}
public FlexCounters(LongAdder currentCount, LongAdder totalCount){
this.currentCount = currentCount;
this.totalCount = totalCount;
}
public int getCurrentCount(){
return currentCount.intValue();
}
public int getTotalCount(){
return totalCount.intValue();
}
public LongAdder getCurrentCountAdder(){
return currentCount;
}
public LongAdder getTotalCountAdder(){
return totalCount;
}
public void incrementTotalCount(){
totalCount.increment();
}
public void incrementCurrentCount(){
currentCount.increment();
}
public void incrementCurrentAndTotalCount(){
currentCount.increment();
totalCount.increment();
}
}
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