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package org.glassfish.external.statistics.impl;
import org.glassfish.external.statistics.CountStatistic;
import java.util.Map;
import java.lang.reflect.*;
/**
* @author Sreenivas Munnangi
*/
public final class CountStatisticImpl extends StatisticImpl
implements CountStatistic, InvocationHandler {
private long count = 0L;
private final long initCount;
private final CountStatistic cs =
(CountStatistic) Proxy.newProxyInstance(
CountStatistic.class.getClassLoader(),
new Class[] { CountStatistic.class },
this);
public CountStatisticImpl(long countVal, String name, String unit,
String desc, long sampleTime, long startTime) {
super(name, unit, desc, startTime, sampleTime);
count = countVal;
initCount = countVal;
}
public CountStatisticImpl(String name, String unit, String desc) {
this(0L, name, unit, desc, -1L, System.currentTimeMillis());
}
public synchronized CountStatistic getStatistic() {
return cs;
}
public synchronized Map getStaticAsMap() {
Map m = super.getStaticAsMap();
m.put("count", getCount());
return m;
}
public synchronized String toString() {
return super.toString() + NEWLINE + "Count: " + getCount();
}
public synchronized long getCount() {
return count;
}
public synchronized void setCount(long countVal) {
count = countVal;
sampleTime = System.currentTimeMillis();
}
public synchronized void increment() {
count++;
sampleTime = System.currentTimeMillis();
}
public synchronized void increment(long delta) {
count = count + delta;
sampleTime = System.currentTimeMillis();
}
public synchronized void decrement() {
count--;
sampleTime = System.currentTimeMillis();
}
@Override
public synchronized void reset() {
super.reset();
count = initCount;
sampleTime = -1L;
}
// todo: equals implementation
public Object invoke(Object proxy, Method m, Object[] args) throws Throwable {
checkMethod(m);
Object result;
try {
result = m.invoke(this, args);
} catch (InvocationTargetException e) {
throw e.getTargetException();
} catch (Exception e) {
throw new RuntimeException("unexpected invocation exception: " +
e.getMessage());
}
return result;
}
}
