LongDelta.java
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package se.lil.om;
import java.math.BigDecimal;
import java.sql.ResultSet;
import java.sql.Timestamp;
class LongDelta {
public String name = null;
public BigDecimal curValue = null;
public BigDecimal lastValue = null;
public Timestamp lastFetch = null;
public Timestamp curFetch = null;
boolean urProt = false; // Under-run protection
boolean lastUpdCausedUR = false;
public static BigDecimal bd1000 = new BigDecimal(1000);
public LongDelta() {};
public LongDelta(boolean UnderrunProtection) { this.urProt = UnderrunProtection; }
public void update(ResultSet rset) throws Throwable{
update(rset, 2, false, true);
}
public void update(ResultSet rset, boolean convert) throws Throwable{
update(rset, 2, convert, true);
}
public void update(ResultSet rset, int pos, boolean convert) throws Throwable{
update(rset, pos, convert, true);
}
public void update(ResultSet rset, int pos, boolean convert, boolean close) throws Throwable{
rset.next();
update(rset.getBigDecimal(pos), rset.getTimestamp(1), convert);
if(close) rset.close();
}
public void update(BigDecimal value, Timestamp timestamp) {
update(value, timestamp, false);
}
public void update(BigDecimal value, Timestamp timestamp, boolean convert) {
if(convert) value = value.divide(bd1000, BigDecimal.ROUND_HALF_UP);
if(urProt) {
if(this.curValue != null && this.curValue.compareTo(value) > 0) {
//This would be a negative delta. Ignore this data
//System.out.println("Underrunprotection on " + name + " New Val: " + newval + " Old Val: " + this.curValue);
lastUpdCausedUR = true;
return;
}
}
this.lastFetch = this.curFetch;
this.curFetch = timestamp;
this.lastValue = this.curValue;
this.curValue = value;
lastUpdCausedUR = false;
}
public boolean didLastUnderRun() {
return lastUpdCausedUR;
}
public double getPerSecondValue() throws Throwable {
if(this.curValue != null && this.lastValue != null && this.lastFetch != null && this.curFetch != null) {
// We have values, calculate the number of gets per second
double numMilliSeconds = this.curFetch.getTime() - this.lastFetch.getTime();
double delta = this.curValue.subtract(this.lastValue).doubleValue();
double perMilli = delta/numMilliSeconds;
return perMilli * 1000;
} else {
return 0;
}
}
public long getCurrentValue() throws Throwable {
if(this.curValue != null) return this.curValue.longValue();
else return 0;
}
public double getSeconds() throws Throwable {
if(this.lastFetch != null && this.curFetch != null) {
double numSeconds = this.curFetch.getTime() - this.lastFetch.getTime();
return numSeconds/1000;
}
return 0;
}
public long getMilliSeconds() throws Throwable {
if(this.lastFetch != null && this.curFetch != null) {
return this.curFetch.getTime() - this.lastFetch.getTime();
}
return 0;
}
public long getDelta() throws Throwable {
if(this.lastValue != null && this.curValue != null) {
return this.curValue.subtract(this.lastValue).longValue();
}
return 0;
}
}