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Make incremental update zoom processing more disk I/O efficient

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This commit is contained in:
Mike Primm 2011-07-21 18:33:04 -05:00
parent da566cdecc
commit 8c134edce3
1 changed files with 60 additions and 18 deletions
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50
src/main/java/org/dynmap/DynmapWorld.java
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@ -85,6 +85,14 @@ public class DynmapWorld {
}
}
private String[] peekQueuedUpdates(int level) {
if(level >= zoomoutupdates.length)
return new String[0];
synchronized(lock) {
return zoomoutupdates[level].toArray(new String[zoomoutupdates[level].size()]);
}
}
private static class DirFilter implements FilenameFilter {
public boolean accept(File f, String n) {
if(!n.equals("..") && !n.equals(".")) {
@ -142,6 +150,7 @@ public class DynmapWorld {
return true;
HashMap<String, PrefixData> maptab = buildPrefixData(zoomlevel);
if(checkts) { /* If doing timestamp based scan (initial) */
DirFilter df = new DirFilter();
for(String pfx : maptab.keySet()) { /* Walk through prefixes */
PrefixData pd = maptab.get(pfx);
@ -160,6 +169,38 @@ public class DynmapWorld {
}
}
Debug.debug("freshenZoomOutFiles(" + world.getName() + "," + zoomlevel + ") - done (" + cnt + " updated files)");
}
else { /* Else, only process updates */
String[] paths = peekQueuedUpdates(zoomlevel); /* Get pending updates */
HashMap<String, ProcessTileRec> toprocess = new HashMap<String, ProcessTileRec>();
/* Accumulate zoomed tiles to be processed (combine triggering subtiles) */
for(String p : paths) {
File f = new File(p); /* Make file */
/* Find matching prefix */
for(PrefixData pd : maptab.values()) { /* Walk through prefixes */
ProcessTileRec tr = null;
/* If big map and matches name pattern */
if(pd.isbigmap && f.getName().startsWith(pd.fnprefix) &&
f.getParentFile().getParentFile().getName().equals(pd.baseprefix)) {
tr = processZoomFile(f, pd);
}
/* If not big map and matches name pattern */
else if((!pd.isbigmap) && f.getName().startsWith(pd.fnprefix)) {
tr = processZoomFile(f, pd);
}
if(tr != null) {
String zfpath = tr.zf.getPath();
if(!toprocess.containsKey(zfpath)) {
toprocess.put(zfpath, tr);
}
}
}
}
/* Do processing */
for(ProcessTileRec s : toprocess.values()) {
processZoomTile(s.pd, s.zf, s.zfname, s.x, s.y);
}
}
/* Return true when we have none left at the level */
return (maptab.size() == 0);
}
@ -226,6 +267,7 @@ public class DynmapWorld {
File zf;
String zfname;
int x, y;
PrefixData pd;
}
private String makeFilePath(PrefixData pd, int x, int y, boolean zoomed) {
@ -253,7 +295,7 @@ public class DynmapWorld {
int cnt = 0;
/* Do processing */
for(ProcessTileRec s : toprocess.values()) {
processZoomTile(pd, dir, s.zf, s.zfname, s.x, s.y);
processZoomTile(s.pd, s.zf, s.zfname, s.x, s.y);
cnt++;
}
Debug.debug("processZoomDirectory(" + dir.getPath() + "," + pd.baseprefix + ") - done (" + cnt + " files)");
@ -310,12 +352,13 @@ public class DynmapWorld {
rec.x = x;
rec.y = y;
rec.zfname = zfname;
rec.pd = pd;
Debug.debug("Process " + zf.getPath() + " due to " + f.getPath());
return rec;
}
private void processZoomTile(PrefixData pd, File dir, File zf, String zfname, int tx, int ty) {
Debug.debug("processZoomFile(" + pd.baseprefix + "," + dir.getPath() + "," + zf.getPath() + "," + tx + "," + ty + ")");
private void processZoomTile(PrefixData pd, File zf, String zfname, int tx, int ty) {
Debug.debug("processZoomFile(" + pd.baseprefix + "," + zf.getPath() + "," + tx + "," + ty + ")");
int width = 128, height = 128;
BufferedImage zIm = null;
KzedBufferedImage kzIm = null;
@ -347,7 +390,6 @@ public class DynmapWorld {
im.getRGB(0, 0, width, height, argb, 0, width); /* Read data */
im.flush();
/* Do binlinear scale to 64x64 */
Color c1 = new Color();
int off = 0;
for(int y = 0; y < height; y += 2) {
off = y*width;