big ol' memory, cpu usage, and shutdown handling update. main changes include:

* rather than have all jobs created hooked into the clock for offset updates, have the jobQueue stay hooked up and update any active jobs accordingly (killing a memory leak of a JobTiming objects - one per job)
* dont go totally insane during shutdown and log like mad (though the clientApp things still log like mad, since they don't know the router is going down)
* adjust memory buffer sizes based on real world values so we don't have to expand/contract a lot
* dont display things that are completely useless (who cares what the first 32 bytes of a public key are?)
* reduce temporary object creation
* use more efficient collections at times
* on shutdown, log some state information (ready/timed jobs, pending messages, etc)
* explicit GC every 10 jobs.  yeah, not efficient, but just for now we'll keep 'er in there
* only reread the router config file if it changes (duh)

core/java/src/net/i2p/stat/Rate.java

@@ -350,7 +350,7 @@ public class Rate {
     }
 
     public void store(OutputStream out, String prefix) throws IOException {
-        StringBuffer buf = new StringBuffer(2048);
+        StringBuffer buf = new StringBuffer(16*1048);
         PersistenceHelper.add(buf, prefix, ".period", "Number of milliseconds in the period", _period);
         PersistenceHelper.add(buf, prefix, ".creationDate",
                               "When was this rate created?  (milliseconds since the epoch, GMT)", _creationDate);

core/java/src/net/i2p/stat/RateStat.java

@@ -76,7 +76,7 @@ public class RateStat {
     private final static String NL = System.getProperty("line.separator");
 
     public String toString() {
-        StringBuffer buf = new StringBuffer(512);
+        StringBuffer buf = new StringBuffer(4096);
         buf.append(getGroupName()).append('.').append(getName()).append(": ").append(getDescription()).append('\n');
         long periods[] = getPeriods();
         Arrays.sort(periods);
@@ -103,7 +103,7 @@ public class RateStat {
     }
 
     public void store(OutputStream out, String prefix) throws IOException {
-        StringBuffer buf = new StringBuffer(128);
+        StringBuffer buf = new StringBuffer(1024);
         buf.append(NL);
         buf.append("################################################################################").append(NL);
         buf.append("# Rate: ").append(_groupName).append(": ").append(_statName).append(NL);
@@ -112,7 +112,7 @@ public class RateStat {
         out.write(buf.toString().getBytes());
         buf = null;
         for (int i = 0; i < _rates.length; i++) {
-            StringBuffer rbuf = new StringBuffer(256);
+            StringBuffer rbuf = new StringBuffer(1024);
             rbuf.append("#######").append(NL);
             rbuf.append("# Period : ").append(DataHelper.formatDuration(_rates[i].getPeriod())).append(" for rate ")
                 .append(_groupName).append(" - ").append(_statName).append(NL);

core/java/src/net/i2p/stat/StatManager.java

@@ -80,18 +80,20 @@ public class StatManager {
     }
 
     public void coallesceStats() {
-        for (Iterator iter = getFrequencyNames().iterator(); iter.hasNext();) {
-            String name = (String) iter.next();
-            FrequencyStat stat = getFrequency(name);
-            if (stat != null) {
-                stat.coallesceStats();
+        synchronized (_frequencyStats) {
+            for (Iterator iter = _frequencyStats.values().iterator(); iter.hasNext();) {
+                FrequencyStat stat = (FrequencyStat)iter.next();
+                if (stat != null) {
+                    stat.coallesceStats();
+                }
             }
         }
-        for (Iterator iter = getRateNames().iterator(); iter.hasNext();) {
-            String name = (String) iter.next();
-            RateStat stat = getRate(name);
-            if (stat != null) {
-                stat.coallesceStats();
+        synchronized (_rateStats) {
+            for (Iterator iter = _rateStats.values().iterator(); iter.hasNext();) {
+                RateStat stat = (RateStat)iter.next();
+                if (stat != null) {
+                    stat.coallesceStats();
+                }
             }
         }
     }
@@ -105,11 +107,11 @@ public class StatManager {
     }
 
     public Set getFrequencyNames() {
-        return Collections.unmodifiableSet(new HashSet(_frequencyStats.keySet()));
+        return new HashSet(_frequencyStats.keySet());
     }
 
     public Set getRateNames() {
-        return Collections.unmodifiableSet(new HashSet(_rateStats.keySet()));
+        return new HashSet(_rateStats.keySet());
     }
 
     /** is the given stat a monitored rate? */