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// $Id$
//
// = FILENAME
// NavWeapDataHandler.java
//
// = AUTHOR
// Michael Kircher (mk1@cs.wustl.edu)
//
// = DESCRIPTION
// This is an implementation of the interface Data Handler,
// it handles Navigation and Weapons data, where statistic data is
// part of it. Several Observables are declared, they can be accessed by
// any number of Observers, which could reside in a Java Bean for example.
//
// ============================================================================
import org.omg.CORBA.*;
public class NavWeapDataHandler implements DataHandler {
java.util.Hashtable ObservablesTable;
int received_events_;
// Observable for Navigation data
class NavigationObservable extends DemoObservable {
// to ask which kind of viewer is needed to display data
public int getProperty () {
return Properties.NAVIGATION;
}
public void updateNavigation (Navigation navigation) {
setChanged ();
notifyObservers (navigation);
}
}
class WeaponsObservable extends DemoObservable {
// to ask which kind of viewer is needed to display data
public int getProperty () {
return Properties.WEAPONS;
}
public void updateWeapons (Weapons weapons) {
setChanged ();
notifyObservers (weapons);
}
}
class Cpu_UsageObservable extends DemoObservable {
public int getProperty () {
return Properties.DOUBLE;
}
public void updateCpu_Usage (double utilization) {
setChanged ();
Double temp_ = new Double (utilization);
notifyObservers (temp_);
}
}
class OverheadObservable extends DemoObservable {
public int getProperty () {
return Properties.DOUBLE;
}
public void updateOverhead (double overhead) {
setChanged ();
Double temp_ = new Double (overhead);
notifyObservers (temp_);
}
}
class JitterObservable extends DemoObservable {
double latency = 0.0;
double last_latency = 0.0;
public int getProperty () {
return Properties.DOUBLE;
}
public void updateJitter (int completion_time,
int computation_time,
int arrival_time ) {
last_latency = latency;
latency = (double)(completion_time
- computation_time
- arrival_time);
latency = latency > 0 ? latency : 0;
double jitter_ = (double)Math.abs(latency - last_latency);
setChanged ();
Double temp_ = new Double (jitter_);
notifyObservers (temp_);
}
}
class DeadlinesObservable extends DemoObservable {
public int getProperty () {
return Properties.DOUBLE;
}
public void updateDeadlines (int deadline_time,
int completion_time) {
double missed_ = (double) ((deadline_time
< completion_time)
? 1.0 : 0.0);
Double temp_ = new Double (missed_);
setChanged ();
notifyObservers (temp_);
}
}
class LatencyObservable extends DemoObservable {
double latency = 0.0;
double last_latency = 0.0;
public int getProperty () {
return Properties.DOUBLE;
}
public void updateLatency (int completion_time,
int computation_time,
int arrival_time ) {
last_latency = latency;
latency = (double)(completion_time
- computation_time
- arrival_time);
latency = latency > 0 ? latency : 0;
setChanged ();
Double temp_ = new Double(latency);
notifyObservers (temp_);
}
}
public void update (Any any_value) {
if (any_value.type().equal (NavigationHelper.type()))
{
Navigation navigation_ = NavigationHelper.extract (any_value);
NavigationObservable nobs = (NavigationObservable)ObservablesTable.get ("NavigationObservable");
nobs.updateNavigation (navigation_);
Cpu_UsageObservable cobs = (Cpu_UsageObservable)ObservablesTable.get ("Cpu_UsageObservable");
cobs.updateCpu_Usage (navigation_.utilization);
OverheadObservable oobs = (OverheadObservable)ObservablesTable.get ("OverheadObservable");
oobs.updateOverhead (navigation_.overhead);
JitterObservable jobs = (JitterObservable)ObservablesTable.get ("JitterObservable");
jobs.updateJitter (navigation_.completion_time,
navigation_.computation_time,
navigation_.arrival_time);
DeadlinesObservable dobs = (DeadlinesObservable)ObservablesTable.get ("DeadlinesObservable");
dobs.updateDeadlines (navigation_.deadline_time,
navigation_.completion_time);
LatencyObservable lobs = (LatencyObservable)ObservablesTable.get ("LatencyObservable");
lobs.updateLatency (navigation_.completion_time,
navigation_.computation_time,
navigation_.arrival_time);
received_events_++;
}
else if (any_value.type().equal (WeaponsHelper.type()))
{
Weapons weapons_ = WeaponsHelper.extract (any_value);
WeaponsObservable wobs = (WeaponsObservable)ObservablesTable.get ("WeaponsObservable");;
wobs.updateWeapons (weapons_);
Cpu_UsageObservable cobs = (Cpu_UsageObservable)ObservablesTable.get ("Cpu_UsageObservable");
cobs.updateCpu_Usage (weapons_.utilization);
OverheadObservable oobs = (OverheadObservable)ObservablesTable.get ("OverheadObservable");
oobs.updateOverhead (weapons_.overhead);
JitterObservable jobs = (JitterObservable)ObservablesTable.get ("JitterObservable");
jobs.updateJitter (weapons_.completion_time,
weapons_.computation_time,
weapons_.arrival_time);
DeadlinesObservable dobs = (DeadlinesObservable)ObservablesTable.get ("DeadlinesObservable");
dobs.updateDeadlines (weapons_.deadline_time,
weapons_.completion_time);
LatencyObservable lobs = (LatencyObservable)ObservablesTable.get ("LatencyObservable");
lobs.updateLatency (weapons_.completion_time,
weapons_.computation_time,
weapons_.arrival_time);
received_events_++;
}
else
System.out.println ("Received wrong type information"+any_value.type());
}
NavWeapDataHandler () {
ObservablesTable = new java.util.Hashtable();
ObservablesTable.put ("NavigationObservable", new NavigationObservable());
ObservablesTable.put ("WeaponsObservable", new WeaponsObservable());
ObservablesTable.put ("Cpu_UsageObservable", new Cpu_UsageObservable());
ObservablesTable.put ("OverheadObservable", new OverheadObservable());
ObservablesTable.put ("JitterObservable", new JitterObservable());
ObservablesTable.put ("DeadlinesObservable", new DeadlinesObservable());
ObservablesTable.put ("LatencyObservable", new LatencyObservable());
}
public java.util.Enumeration getObservablesList () {
return ObservablesTable.keys ();
}
public DemoObservable getObservable(String name) {
return (DemoObservable)ObservablesTable.get (name);
}
public int getObservableProperty (String name) {
DemoObservable obs = (DemoObservable)ObservablesTable.get (name);
return obs.getProperty ();
}
}
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