LongDelta.java
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package se.lil.om;
import java.sql.ResultSet;
import java.sql.Timestamp;
class LongDelta {
public String name = null;
public Long curValue = null;
public Long lastValue = null;
public Timestamp lastFetch = null;
public Timestamp curFetch = null;
boolean urProt = false; // Under-run protection
boolean lastUpdCausedUR = false;
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();
long newval = rset.getLong(pos);
if(convert) newval = newval/1000;
if(urProt) {
if(this.curValue != null && this.curValue > newval) {
//This would be a negative delta. Ignore this data
//System.out.println("Underrunprotection on " + name + " New Val: " + newval + " Old Val: " + this.curValue);
lastUpdCausedUR = true;
if(close) rset.close();
return;
}
}
this.lastFetch = this.curFetch;
this.curFetch = rset.getTimestamp(1);
this.lastValue = this.curValue;
this.curValue = newval;
lastUpdCausedUR = false;
if(close) rset.close();
}
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 - this.lastValue;
double perMilli = delta/numMilliSeconds;
return perMilli * 1000;
} else {
return 0;
}
}
public long getCurrentValue() throws Throwable {
if(this.curValue != null) return this.curValue;
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 - this.lastValue;
}
return 0;
}
}