--- a/servlet/src/digilib/servlet/DigilibImageWorker.java	Tue Oct 12 20:42:58 2010 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,274 +0,0 @@
-/* DigilibImageWorker.java -- worker for image operations
- * 
- * Digital Image Library servlet components
- * 
- * Copyright (C) 2004 Robert Casties (robcast@mail.berlios.de)
- * 
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- * 
- * Please read license.txt for the full details. A copy of the GPL may be found
- * at http://www.gnu.org/copyleft/lgpl.html
- * 
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place, Suite 330, Boston, MA 02111-1307 USA
- *  
- * Created on 19.10.2004
- */
-
-package digilib.servlet;
-
-import java.awt.Rectangle;
-import java.awt.geom.Rectangle2D;
-import java.io.IOException;
-import java.io.OutputStream;
-
-import digilib.image.DocuImage;
-import digilib.image.ImageOpException;
-import digilib.image.ImageOps;
-import digilib.io.FileOpException;
-import digilib.io.ImageFile;
-
-/**
- * worker for image operations.
- * 
- * @author casties
- * 
- */
-public class DigilibImageWorker extends DigilibWorker {
-
-	private DigilibConfiguration dlConfig;
-
-	//HttpServletResponse response;
-
-	OutputStream outstream;
-	
-	long startTime;
-
-	String mimeType;
-
-	int scaleQual;
-
-	//DigilibRequest dlRequest;
-
-	//ImageJobInformation ijd;
-	
-	float paramROT;
-
-	float paramCONT;
-
-	float paramBRGT;
-
-	float[] paramRGBM;
-
-	float[] paramRGBA;
-
-	ImageFile fileToLoad;
-
-	float areaXoff;
-
-	float areaYoff;
-
-	float areaWidth;
-
-	float areaHeight;
-
-	float scaleXY;
-
-	Rectangle2D outerUserImgArea;
-
-	Rectangle2D innerUserImgArea;
-
-	float minSubsample;
-
-	boolean wholeRotArea;
-
-	boolean vmir;
-	boolean hmir;
-	
-	int forceType;
-
-
-	public DigilibImageWorker(DigilibConfiguration dlConfig, OutputStream outstream, ImageJobInformation jobinfo) {
-		super();
-		
-		this.dlConfig = dlConfig;
-		this.outstream = outstream;
-		this.mimeType = jobinfo.get_mimeType();
-		this.scaleQual = jobinfo.get_scaleQual();
-		this.paramROT = jobinfo.getAsFloat("rot");
-		this.paramCONT = jobinfo.getAsFloat("cont");
-		this.paramBRGT = jobinfo.getAsFloat("brgt");
-		this.paramRGBM = jobinfo.get_paramRGBM();
-		this.paramRGBA = jobinfo.get_paramRGBA();
-		try {
-			this.fileToLoad = jobinfo.get_fileToLoad();
-			this.scaleXY = jobinfo.get_scaleXY();
-			this.outerUserImgArea = jobinfo.get_outerUserImgArea();
-			this.innerUserImgArea = jobinfo.get_innerUserImgArea();
-		} catch (IOException e) {
-			// TODO Auto-generated catch block
-			e.printStackTrace();
-		} catch (ImageOpException e) {
-			// TODO Auto-generated catch block
-			e.printStackTrace();
-		}
-		
-		this.minSubsample = dlConfig.getAsFloat("subsample-minimum");
-		this.wholeRotArea = jobinfo.get_wholeRotArea();
-		this.forceType = jobinfo.get_forceType();
-		this.hmir = jobinfo.get_hmir();
-		this.vmir = jobinfo.get_vmir();
-	}
-
-	/*
-	 * do the work
-	 */
-	public DocuImage render() throws FileOpException, IOException, ImageOpException {
-		
-		logger.debug("image worker " + this.getName() + " working");
-		startTime = System.currentTimeMillis();
-
-		/* crop and scale image */
-
-		// new DocuImage instance
-		DocuImage docuImage = dlConfig.getDocuImageInstance();
-		if (docuImage == null) {
-			throw new ImageOpException("Unable to load DocuImage class!");
-		}
-
-		// set interpolation quality
-		docuImage.setQuality(scaleQual);
-
-		Rectangle loadRect = outerUserImgArea.getBounds();
-		// use subimage loading if possible
-		if (docuImage.isSubimageSupported()) {
-			logger.debug("Subimage: scale " + scaleXY + " = " + (1 / scaleXY));
-			float subf = 1f;
-			float subsamp = 1f;
-			if (scaleXY < 1) {
-				subf = 1 / scaleXY;
-				// for higher quality reduce subsample factor by
-				// minSubsample
-				if (scaleQual > 0) {
-					subsamp = (float) Math.max(Math.floor(subf / minSubsample),
-							1d);
-				} else {
-					subsamp = (float) Math.floor(subf);
-				}
-				scaleXY = subsamp / subf;
-				logger.debug("Using subsampling: " + subsamp + " rest "
-						+ scaleXY);
-			}
-
-			docuImage.loadSubimage(fileToLoad, loadRect, (int) subsamp);
-
-			logger.debug("SUBSAMP: " + subsamp + " -> " + docuImage.getWidth()
-					+ "x" + docuImage.getHeight());
-
-			docuImage.scale(scaleXY, scaleXY);
-
-		} else {
-			// else load and crop the whole file
-			docuImage.loadImage(fileToLoad);
-			docuImage.crop((int) loadRect.getX(), (int) loadRect.getY(),
-					(int) loadRect.getWidth(), (int) loadRect.getHeight());
-
-			docuImage.scale(scaleXY, scaleXY);
-		}
-
-		// mirror image
-		// operation mode: "hmir": mirror horizontally, "vmir": mirror
-		// vertically
-		if (hmir) {
-			docuImage.mirror(0);
-		}
-		if (vmir) {
-			docuImage.mirror(90);
-		}
-
-		// rotate image
-		if (paramROT != 0d) {
-			docuImage.rotate(paramROT);
-			if (wholeRotArea) {
-				// crop to the inner bounding box
-				float xcrop = (float) (docuImage.getWidth() - innerUserImgArea
-						.getWidth()
-						* scaleXY);
-				float ycrop = (float) (docuImage.getHeight() - innerUserImgArea
-						.getHeight()
-						* scaleXY);
-				if ((xcrop > 0) || (ycrop > 0)) {
-					// only crop smaller
-					xcrop = (xcrop > 0) ? xcrop : 0;
-					ycrop = (ycrop > 0) ? ycrop : 0;
-					// crop image
-					docuImage.crop((int) (xcrop / 2), (int) (ycrop / 2),
-							(int) (docuImage.getWidth() - xcrop),
-							(int) (docuImage.getHeight() - ycrop));
-				}
-			}
-
-		}
-
-		// color modification
-		if ((paramRGBM != null) || (paramRGBA != null)) {
-			// make shure we actually have two arrays
-			if (paramRGBM == null) {
-				paramRGBM = new float[3];
-			}
-			if (paramRGBA == null) {
-				paramRGBA = new float[3];
-			}
-			// calculate "contrast" values (c=2^x)
-			float[] mult = new float[3];
-			for (int i = 0; i < 3; i++) {
-				mult[i] = (float) Math.pow(2, (float) paramRGBM[i]);
-			}
-			docuImage.enhanceRGB(mult, paramRGBA);
-		}
-
-		// contrast and brightness enhancement
-		if ((paramCONT != 0f) || (paramBRGT != 0f)) {
-			float mult = (float) Math.pow(2, paramCONT);
-			docuImage.enhance(mult, paramBRGT);
-		}
-
-		logger.debug("rendered in " + (System.currentTimeMillis() - startTime) + "ms");
-
-		return docuImage;
-	}
-
-	public void write(DocuImage img) throws FileOpException, IOException {
-		/* write the resulting image */
-
-		// setup output -- if output type is forced use that otherwise
-		// if source is JPG then dest will be JPG else it's PNG
-		if (forceType != ImageOps.TYPE_AUTO) {
-			if (forceType == ImageOps.TYPE_JPEG) {
-				mimeType = "image/jpeg";
-			}
-			if (forceType == ImageOps.TYPE_PNG) {
-				mimeType = "image/png";
-			}
-		} else if ((mimeType.equals("image/jpeg")
-				|| mimeType.equals("image/jp2") || mimeType.equals("image/fpx"))) {
-			mimeType = "image/jpeg";
-		} else {
-			mimeType = "image/png";
-		}
-
-		// write the image
-		img.writeImage(mimeType, outstream);
-		outstream.flush();
-		
-		
-		logger.info("image worker " + this.getName() + " done in "
-				+ (System.currentTimeMillis() - startTime));
-
-		img.dispose();
-	}
-}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/servlet/src/digilib/servlet/DigilibImageWorker1.java	Wed Oct 13 18:40:54 2010 +0200
@@ -0,0 +1,274 @@
+/* DigilibImageWorker.java -- worker for image operations
+ * 
+ * Digital Image Library servlet components
+ * 
+ * Copyright (C) 2004 Robert Casties (robcast@mail.berlios.de)
+ * 
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ * 
+ * Please read license.txt for the full details. A copy of the GPL may be found
+ * at http://www.gnu.org/copyleft/lgpl.html
+ * 
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA 02111-1307 USA
+ *  
+ * Created on 19.10.2004
+ */
+
+package digilib.servlet;
+
+import java.awt.Rectangle;
+import java.awt.geom.Rectangle2D;
+import java.io.IOException;
+import java.io.OutputStream;
+
+import digilib.image.DocuImage;
+import digilib.image.ImageOpException;
+import digilib.image.ImageOps;
+import digilib.io.FileOpException;
+import digilib.io.ImageFile;
+
+/**
+ * worker for image operations.
+ * 
+ * @author casties
+ * 
+ */
+public class DigilibImageWorker1 extends DigilibWorker1 {
+
+	private DigilibConfiguration dlConfig;
+
+	//HttpServletResponse response;
+
+	OutputStream outstream;
+	
+	long startTime;
+
+	String mimeType;
+
+	int scaleQual;
+
+	//DigilibRequest dlRequest;
+
+	//ImageJobInformation ijd;
+	
+	float paramROT;
+
+	float paramCONT;
+
+	float paramBRGT;
+
+	float[] paramRGBM;
+
+	float[] paramRGBA;
+
+	ImageFile fileToLoad;
+
+	float areaXoff;
+
+	float areaYoff;
+
+	float areaWidth;
+
+	float areaHeight;
+
+	float scaleXY;
+
+	Rectangle2D outerUserImgArea;
+
+	Rectangle2D innerUserImgArea;
+
+	float minSubsample;
+
+	boolean wholeRotArea;
+
+	boolean vmir;
+	boolean hmir;
+	
+	int forceType;
+
+
+	public DigilibImageWorker1(DigilibConfiguration dlConfig, OutputStream outstream, ImageJobInformation jobinfo) {
+		super();
+		
+		this.dlConfig = dlConfig;
+		this.outstream = outstream;
+		this.mimeType = jobinfo.get_mimeType();
+		this.scaleQual = jobinfo.get_scaleQual();
+		this.paramROT = jobinfo.getAsFloat("rot");
+		this.paramCONT = jobinfo.getAsFloat("cont");
+		this.paramBRGT = jobinfo.getAsFloat("brgt");
+		this.paramRGBM = jobinfo.get_paramRGBM();
+		this.paramRGBA = jobinfo.get_paramRGBA();
+		try {
+			this.fileToLoad = jobinfo.get_fileToLoad();
+			this.scaleXY = jobinfo.get_scaleXY();
+			this.outerUserImgArea = jobinfo.get_outerUserImgArea();
+			this.innerUserImgArea = jobinfo.get_innerUserImgArea();
+		} catch (IOException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		} catch (ImageOpException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+		
+		this.minSubsample = dlConfig.getAsFloat("subsample-minimum");
+		this.wholeRotArea = jobinfo.get_wholeRotArea();
+		this.forceType = jobinfo.get_forceType();
+		this.hmir = jobinfo.get_hmir();
+		this.vmir = jobinfo.get_vmir();
+	}
+
+	/*
+	 * do the work
+	 */
+	public DocuImage render() throws FileOpException, IOException, ImageOpException {
+		
+		logger.debug("image worker " + this.getName() + " working");
+		startTime = System.currentTimeMillis();
+
+		/* crop and scale image */
+
+		// new DocuImage instance
+		DocuImage docuImage = dlConfig.getDocuImageInstance();
+		if (docuImage == null) {
+			throw new ImageOpException("Unable to load DocuImage class!");
+		}
+
+		// set interpolation quality
+		docuImage.setQuality(scaleQual);
+
+		Rectangle loadRect = outerUserImgArea.getBounds();
+		// use subimage loading if possible
+		if (docuImage.isSubimageSupported()) {
+			logger.debug("Subimage: scale " + scaleXY + " = " + (1 / scaleXY));
+			float subf = 1f;
+			float subsamp = 1f;
+			if (scaleXY < 1) {
+				subf = 1 / scaleXY;
+				// for higher quality reduce subsample factor by
+				// minSubsample
+				if (scaleQual > 0) {
+					subsamp = (float) Math.max(Math.floor(subf / minSubsample),
+							1d);
+				} else {
+					subsamp = (float) Math.floor(subf);
+				}
+				scaleXY = subsamp / subf;
+				logger.debug("Using subsampling: " + subsamp + " rest "
+						+ scaleXY);
+			}
+
+			docuImage.loadSubimage(fileToLoad, loadRect, (int) subsamp);
+
+			logger.debug("SUBSAMP: " + subsamp + " -> " + docuImage.getWidth()
+					+ "x" + docuImage.getHeight());
+
+			docuImage.scale(scaleXY, scaleXY);
+
+		} else {
+			// else load and crop the whole file
+			docuImage.loadImage(fileToLoad);
+			docuImage.crop((int) loadRect.getX(), (int) loadRect.getY(),
+					(int) loadRect.getWidth(), (int) loadRect.getHeight());
+
+			docuImage.scale(scaleXY, scaleXY);
+		}
+
+		// mirror image
+		// operation mode: "hmir": mirror horizontally, "vmir": mirror
+		// vertically
+		if (hmir) {
+			docuImage.mirror(0);
+		}
+		if (vmir) {
+			docuImage.mirror(90);
+		}
+
+		// rotate image
+		if (paramROT != 0d) {
+			docuImage.rotate(paramROT);
+			if (wholeRotArea) {
+				// crop to the inner bounding box
+				float xcrop = (float) (docuImage.getWidth() - innerUserImgArea
+						.getWidth()
+						* scaleXY);
+				float ycrop = (float) (docuImage.getHeight() - innerUserImgArea
+						.getHeight()
+						* scaleXY);
+				if ((xcrop > 0) || (ycrop > 0)) {
+					// only crop smaller
+					xcrop = (xcrop > 0) ? xcrop : 0;
+					ycrop = (ycrop > 0) ? ycrop : 0;
+					// crop image
+					docuImage.crop((int) (xcrop / 2), (int) (ycrop / 2),
+							(int) (docuImage.getWidth() - xcrop),
+							(int) (docuImage.getHeight() - ycrop));
+				}
+			}
+
+		}
+
+		// color modification
+		if ((paramRGBM != null) || (paramRGBA != null)) {
+			// make shure we actually have two arrays
+			if (paramRGBM == null) {
+				paramRGBM = new float[3];
+			}
+			if (paramRGBA == null) {
+				paramRGBA = new float[3];
+			}
+			// calculate "contrast" values (c=2^x)
+			float[] mult = new float[3];
+			for (int i = 0; i < 3; i++) {
+				mult[i] = (float) Math.pow(2, (float) paramRGBM[i]);
+			}
+			docuImage.enhanceRGB(mult, paramRGBA);
+		}
+
+		// contrast and brightness enhancement
+		if ((paramCONT != 0f) || (paramBRGT != 0f)) {
+			float mult = (float) Math.pow(2, paramCONT);
+			docuImage.enhance(mult, paramBRGT);
+		}
+
+		logger.debug("rendered in " + (System.currentTimeMillis() - startTime) + "ms");
+
+		return docuImage;
+	}
+
+	public void write(DocuImage img) throws FileOpException, IOException {
+		/* write the resulting image */
+
+		// setup output -- if output type is forced use that otherwise
+		// if source is JPG then dest will be JPG else it's PNG
+		if (forceType != ImageOps.TYPE_AUTO) {
+			if (forceType == ImageOps.TYPE_JPEG) {
+				mimeType = "image/jpeg";
+			}
+			if (forceType == ImageOps.TYPE_PNG) {
+				mimeType = "image/png";
+			}
+		} else if ((mimeType.equals("image/jpeg")
+				|| mimeType.equals("image/jp2") || mimeType.equals("image/fpx"))) {
+			mimeType = "image/jpeg";
+		} else {
+			mimeType = "image/png";
+		}
+
+		// write the image
+		img.writeImage(mimeType, outstream);
+		outstream.flush();
+		
+		
+		logger.info("image worker " + this.getName() + " done in "
+				+ (System.currentTimeMillis() - startTime));
+
+		img.dispose();
+	}
+}

--- a/servlet/src/digilib/servlet/DigilibPDFWorker.java	Tue Oct 12 20:42:58 2010 +0200
+++ b/servlet/src/digilib/servlet/DigilibPDFWorker.java	Wed Oct 13 18:40:54 2010 +0200
@@ -43,7 +43,7 @@
  * @author cmielack
  * 
  */
-public class DigilibPDFWorker extends DigilibWorker {
+public class DigilibPDFWorker extends DigilibWorker1 {
 
 	private DigilibConfiguration dlConfig = null;
 
@@ -165,7 +165,7 @@
 		ImageJobInformation iji = job_info.getImageJobInformation();
 		iji.setValue("pn", pn);
 		// create image worker
-		DigilibImageWorker image_worker = new DigilibImageWorker(dlConfig, null, iji);
+		DigilibImageWorker1 image_worker = new DigilibImageWorker1(dlConfig, null, iji);
 		try {
 			DocuImage img = image_worker.render();
 

--- a/servlet/src/digilib/servlet/DigilibWorker.java	Tue Oct 12 20:42:58 2010 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,195 +0,0 @@
-/* DigilibWorker.java -- image operation worker
- * 
- * Digital Image Library servlet components
- * 
- * Copyright (C) 2004 Robert Casties (robcast@mail.berlios.de)
- * 
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- * 
- * Please read license.txt for the full details. A copy of the GPL may be found
- * at http://www.gnu.org/copyleft/lgpl.html
- * 
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place, Suite 330, Boston, MA 02111-1307 USA
- *  
- * Created on 18.10.2004
- */
-package digilib.servlet;
-
-import java.util.concurrent.Semaphore;
-
-import org.apache.log4j.Logger;
-
-import digilib.image.DocuImage;
-
-/**
- * image operation worker.
- * 
- * @author casties
- */
-public abstract class DigilibWorker {
-
-	protected static Logger logger = Logger.getLogger(DigilibWorker.class);
-
-	private static int maxRunningThreads = 0;
-
-	private static int runningThreads = 0;
-
-	private static int waitingThreads = 0;
-
-	private static int maxWaitingThreads = 0;
-
-	public static Semaphore sem = new Semaphore(2, true);
-
-	protected Throwable error;
-
-	/**
-	 * @param job
-	 */
-	public DigilibWorker() {
-		super();
-		error = null;
-	}
-
-	public abstract DocuImage render() throws Exception;
-
-	public abstract void write(DocuImage img) throws Exception;
-
-	/**
-	 * Do the work.
-	 */
-	public void run() {
-		logger.debug((++waitingThreads) + " waiting threads");
-		DocuImage img = null;
-		try {
-			sem.acquire();
-			waitingThreads--;
-		} catch (InterruptedException e) {
-			error = e;
-			waitingThreads--;
-			// should we reinterrupt?
-			return;
-		}
-		logger.debug((++runningThreads) + " running threads");
-		try {
-			/* 
-			 * do rendering under the semaphore 
-			 */
-			img = render();
-		} catch (Throwable e) {
-			error = e;
-			logger.error(e);
-		} finally {
-			runningThreads--;
-			sem.release();
-		}
-		/* 
-		 * write the result without semaphore
-		 */
-		if (!hasError()) {
-			try{
-				write(img);
-			} catch (Throwable e) {
-				error = e;
-				logger.error(e);
-			}
-		}
-	}
-
-	/**
-	 * Returns the name of this thread.
-	 * 
-	 * @return
-	 */
-	public String getName() {
-		return Thread.currentThread().getName();
-	}
-
-	/** Returns if the worker could run (i.e. is not overloaded).
-	 * 
-	 * @return
-	 */
-	public static boolean canRun() {
-		return ((DigilibWorker.maxWaitingThreads == 0) || (DigilibWorker.getNumWaiting() <= DigilibWorker.maxWaitingThreads));
-	}
-
-	/**
-	 * returns if an error occurred.
-	 * 
-	 * @return
-	 */
-	public boolean hasError() {
-		return (error != null);
-	}
-
-	/**
-	 * @return Returns the error.
-	 */
-	public Throwable getError() {
-		return error;
-	}
-
-	/**
-	 * @return Returns the semaphore.
-	 */
-	public static Semaphore getSemaphore() {
-		return sem;
-	}
-
-	/**
-	 * @param sem
-	 *            The semaphore to set.
-	 */
-	public static void setSemaphore(Semaphore sem) {
-		DigilibWorker.sem = sem;
-	}
-
-	public static void setSemaphore(int maxrun, boolean fair) {
-		sem = new Semaphore(maxrun, fair);
-		maxRunningThreads = maxrun;
-	}
-
-	/**
-	 * The number of currently running threads (approximate).
-	 * 
-	 * @return
-	 */
-	public static int getNumRunning() {
-		return (maxRunningThreads - sem.availablePermits());
-	}
-
-	/**
-	 * The number of currently waiting threads (approximate).
-	 * 
-	 * @return
-	 */
-	public static int getNumWaiting() {
-		return sem.getQueueLength();
-	}
-
-	/**
-	 * @return Returns the maxWaitingThreads.
-	 */
-	public static int getMaxWaitingThreads() {
-		return maxWaitingThreads;
-	}
-
-	/**
-	 * @param maxWaitingThreads The maxWaitingThreads to set.
-	 */
-	public static void setMaxWaitingThreads(int maxWaitingThreads) {
-		DigilibWorker.maxWaitingThreads = maxWaitingThreads;
-	}
-
-	public static int getMaxRunningThreads() {
-		return maxRunningThreads;
-	}
-
-	public static void setMaxRunningThreads(int maxRunningThreads) {
-		DigilibWorker.maxRunningThreads = maxRunningThreads;
-	}
-}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/servlet/src/digilib/servlet/DigilibWorker1.java	Wed Oct 13 18:40:54 2010 +0200
@@ -0,0 +1,195 @@
+/* DigilibWorker.java -- image operation worker
+ * 
+ * Digital Image Library servlet components
+ * 
+ * Copyright (C) 2004 Robert Casties (robcast@mail.berlios.de)
+ * 
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ * 
+ * Please read license.txt for the full details. A copy of the GPL may be found
+ * at http://www.gnu.org/copyleft/lgpl.html
+ * 
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA 02111-1307 USA
+ *  
+ * Created on 18.10.2004
+ */
+package digilib.servlet;
+
+import java.util.concurrent.Semaphore;
+
+import org.apache.log4j.Logger;
+
+import digilib.image.DocuImage;
+
+/**
+ * image operation worker.
+ * 
+ * @author casties
+ */
+public abstract class DigilibWorker1 {
+
+	protected static Logger logger = Logger.getLogger(DigilibWorker1.class);
+
+	private static int maxRunningThreads = 0;
+
+	private static int runningThreads = 0;
+
+	private static int waitingThreads = 0;
+
+	private static int maxWaitingThreads = 0;
+
+	public static Semaphore sem = new Semaphore(2, true);
+
+	protected Throwable error;
+
+	/**
+	 * @param job
+	 */
+	public DigilibWorker1() {
+		super();
+		error = null;
+	}
+
+	public abstract DocuImage render() throws Exception;
+
+	public abstract void write(DocuImage img) throws Exception;
+
+	/**
+	 * Do the work.
+	 */
+	public void run() {
+		logger.debug((++waitingThreads) + " waiting threads");
+		DocuImage img = null;
+		try {
+			sem.acquire();
+			waitingThreads--;
+		} catch (InterruptedException e) {
+			error = e;
+			waitingThreads--;
+			// should we reinterrupt?
+			return;
+		}
+		logger.debug((++runningThreads) + " running threads");
+		try {
+			/* 
+			 * do rendering under the semaphore 
+			 */
+			img = render();
+		} catch (Throwable e) {
+			error = e;
+			logger.error(e);
+		} finally {
+			runningThreads--;
+			sem.release();
+		}
+		/* 
+		 * write the result without semaphore
+		 */
+		if (!hasError()) {
+			try{
+				write(img);
+			} catch (Throwable e) {
+				error = e;
+				logger.error(e);
+			}
+		}
+	}
+
+	/**
+	 * Returns the name of this thread.
+	 * 
+	 * @return
+	 */
+	public String getName() {
+		return Thread.currentThread().getName();
+	}
+
+	/** Returns if the worker could run (i.e. is not overloaded).
+	 * 
+	 * @return
+	 */
+	public static boolean canRun() {
+		return ((DigilibWorker1.maxWaitingThreads == 0) || (DigilibWorker1.getNumWaiting() <= DigilibWorker1.maxWaitingThreads));
+	}
+
+	/**
+	 * returns if an error occurred.
+	 * 
+	 * @return
+	 */
+	public boolean hasError() {
+		return (error != null);
+	}
+
+	/**
+	 * @return Returns the error.
+	 */
+	public Throwable getError() {
+		return error;
+	}
+
+	/**
+	 * @return Returns the semaphore.
+	 */
+	public static Semaphore getSemaphore() {
+		return sem;
+	}
+
+	/**
+	 * @param sem
+	 *            The semaphore to set.
+	 */
+	public static void setSemaphore(Semaphore sem) {
+		DigilibWorker1.sem = sem;
+	}
+
+	public static void setSemaphore(int maxrun, boolean fair) {
+		sem = new Semaphore(maxrun, fair);
+		maxRunningThreads = maxrun;
+	}
+
+	/**
+	 * The number of currently running threads (approximate).
+	 * 
+	 * @return
+	 */
+	public static int getNumRunning() {
+		return (maxRunningThreads - sem.availablePermits());
+	}
+
+	/**
+	 * The number of currently waiting threads (approximate).
+	 * 
+	 * @return
+	 */
+	public static int getNumWaiting() {
+		return sem.getQueueLength();
+	}
+
+	/**
+	 * @return Returns the maxWaitingThreads.
+	 */
+	public static int getMaxWaitingThreads() {
+		return maxWaitingThreads;
+	}
+
+	/**
+	 * @param maxWaitingThreads The maxWaitingThreads to set.
+	 */
+	public static void setMaxWaitingThreads(int maxWaitingThreads) {
+		DigilibWorker1.maxWaitingThreads = maxWaitingThreads;
+	}
+
+	public static int getMaxRunningThreads() {
+		return maxRunningThreads;
+	}
+
+	public static void setMaxRunningThreads(int maxRunningThreads) {
+		DigilibWorker1.maxRunningThreads = maxRunningThreads;
+	}
+}

--- a/servlet/src/digilib/servlet/ImageJobInformation.java	Tue Oct 12 20:42:58 2010 +0200
+++ b/servlet/src/digilib/servlet/ImageJobInformation.java	Wed Oct 13 18:40:54 2010 +0200
@@ -636,6 +636,18 @@
 		return hasOption("mo","vmir");
 	}
 	
+    public float getRot(){
+        return getAsFloat("rot");
+    }
+    
+    public float getCont(){
+        return getAsFloat("cont");
+    }
+    
+    public float getBrgt(){
+        return getAsFloat("brgt");
+    }
+    
 	public boolean checkSendAsFile(){
 		return hasOption("mo", "file")
 		|| hasOption("mo", "rawfile");

--- a/servlet/src/digilib/servlet/Initialiser.java	Tue Oct 12 20:42:58 2010 +0200
+++ b/servlet/src/digilib/servlet/Initialiser.java	Wed Oct 13 18:40:54 2010 +0200
@@ -134,9 +134,9 @@
                 ImageOps.setDocuImage(di);
 				// worker threads
 				int nt = dlConfig.getAsInt("worker-threads");
-				DigilibWorker.setSemaphore(nt, true);
+				DigilibWorker1.setSemaphore(nt, true);
 				int mt = dlConfig.getAsInt("max-waiting-threads");
-				DigilibWorker.setMaxWaitingThreads(mt);
+				DigilibWorker1.setMaxWaitingThreads(mt);
 				// set as the servlets main config
 				context.setAttribute("digilib.servlet.configuration", dlConfig);
 

--- a/servlet/src/digilib/servlet/PDFCache.java	Tue Oct 12 20:42:58 2010 +0200
+++ b/servlet/src/digilib/servlet/PDFCache.java	Wed Oct 13 18:40:54 2010 +0200
@@ -125,7 +125,7 @@
             notifyUser(status, docid, request, response);
         } else if (status == STATUS_DONE) {
             try {
-                sendFile(docid, downloadFilename(pdfji), response);
+                sendFile(docid, getDownloadFilename(pdfji), response);
             } catch (IOException e) {
                 e.printStackTrace();
                 logger.error(e.getMessage());
@@ -212,7 +212,7 @@
 	 * @param pdfji
 	 * @return
 	 */
-	public String downloadFilename(PDFJobInformation pdfji){
+	public String getDownloadFilename(PDFJobInformation pdfji){
 		// filename example: digilib_example_pgs1-3.pdf
 		String filename;
 		filename =  "digilib_";

--- a/servlet/src/digilib/servlet/PDFMaker.java	Tue Oct 12 20:42:58 2010 +0200
+++ b/servlet/src/digilib/servlet/PDFMaker.java	Wed Oct 13 18:40:54 2010 +0200
@@ -41,7 +41,7 @@
 		
 	public void run() {
 
-		if (! DigilibWorker.canRun()) {
+		if (! DigilibWorker1.canRun()) {
 			// TODO include the logger
 			logger.error("Servlet overloaded!");			
 			return;

--- a/servlet/src/digilib/servlet/Scaler.java	Tue Oct 12 20:42:58 2010 +0200
+++ b/servlet/src/digilib/servlet/Scaler.java	Wed Oct 13 18:40:54 2010 +0200
@@ -222,7 +222,7 @@
 			logger.error(e1.getMessage());
 		}
 		
-		if (! DigilibWorker.canRun()) {
+		if (! DigilibWorker1.canRun()) {
 			logger.error("Servlet overloaded!");
 			try {
 				response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
@@ -233,7 +233,7 @@
 		}
 
 		
-		DigilibWorker job=null;
+		DigilibWorker1 job=null;
 		try {
 			
 			long startTime = System.currentTimeMillis();
@@ -261,7 +261,7 @@
 			}
 
 			
-			job = new DigilibImageWorker(dlConfig, outputstream , jobdeclaration);
+			job = new DigilibImageWorker1(dlConfig, outputstream , jobdeclaration);
 
 			job.run();