Author: xor
Date: 2008-10-24 12:05:51 +0000 (Fri, 24 Oct 2008)
New Revision: 23068
Added:
trunk/freenet/src/freenet/node/BandwidthUsageHistory.java
Log:
Add a class for implementing a bandwidth usage graph - I will do that.
Added: trunk/freenet/src/freenet/node/BandwidthUsageHistory.java
===================================================================
--- trunk/freenet/src/freenet/node/BandwidthUsageHistory.java
(rev 0)
+++ trunk/freenet/src/freenet/node/BandwidthUsageHistory.java 2008-10-24
12:05:51 UTC (rev 23068)
@@ -0,0 +1,77 @@
+package freenet.node;
+
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.Date;
+
+/**
+ * A fixed-size list of bandwidth usage measurements. Storing a measurement
+ * automatically stores the time when it was added.
+ *
+ * @author xor
+ *
+ */
+public class BandwidthUsageHistory implements
Iterable<BandwidthUsageHistory.BandwidthUsageSample> {
+
+ public class BandwidthUsageSample {
+ private float value;
+ private long time;
+
+ public BandwidthUsageSample() {
+ value = 0.0f;
+ time = System.currentTimeMillis();
+ }
+
+ public float getValue() {
+ return (value);
+ }
+
+ public float setValue(float newValue) {
+ time = System.currentTimeMillis();
+ return (value = newValue);
+ }
+
+ public long getTime() {
+ return time;
+ }
+ }
+
+ protected final BandwidthUsageSample[] data;
+ protected int slot;
+
+ public BandwidthUsageHistory(int numberOfSamples) {
+ data = new BandwidthUsageSample[numberOfSamples];
+ for(int idx = 0; idx < numberOfSamples; ++idx) {
+ data[idx] = new BandwidthUsageSample();
+ }
+ slot = 0;
+ }
+
+ public void putValue(float value) {
+ slot = (slot+1) % data.length;
+
+ data[slot].setValue(value);
+ }
+
+ public Iterator<BandwidthUsageSample> iterator() {
+ return new Iterator<BandwidthUsageSample>() {
+ int idx = (slot - data.length) % data.length;
+
+ public boolean hasNext() {
+ // TODO Auto-generated method stub
+ return false;
+ }
+
+ public BandwidthUsageSample next() {
+ // TODO Auto-generated method stub
+ return null;
+ }
+
+ public void remove() {
+ // TODO Auto-generated method stub
+
+ }
+
+ };
+ }
+}
