/**
* Given a file and a source this will start a worker-less file downloading.
*
* @param nF
* @param bestSource
*/
private void startFileDownloading(DownloadFile nF, DownloadSource bestSource) {
// first ensure that the file is not already complete on disk:
if (downloadFileCompleteOnDisk(nF)) {
Logger.warn("Complete download: " + nF + " was in the queue. Issueing completion.");
nF.downloadComplete(); // issue completion
wereCompleteItemsInQueue = true;
return;
}
// Create a new info container for the file (if it has never been started before, or if for some
// reason there are no chunks in it (corrupt for some reason? broken code in the past probably))
if (nF.active == null) {
if (nF.getSize() == 0) {
// zero byte files do not need downloading. (and indeed they will fail to dispatch correctly
// as they will never have any incomplete chunks)
try {
nF.getFile().createNewFile();
nF.downloadComplete();
wereCompleteItemsInQueue = true;
return;
} catch (IOException e) {
Logger.severe(
"Empty file: " + nF.getFile().getPath() + " couldn't be created on disk: " + e);
}
}
nF.active = new DownloadInfo(nF);
} else {
if (nF.active.isComplete()) {
Logger.warn("Complete download: " + nF + " was in the queue. Issueing completion.");
nF.downloadComplete();
wereCompleteItemsInQueue = true;
return;
} else if (nF.active.chunks.size() == 0) {
Logger.warn(
"Active download '"
+ nF
+ "' in queue with no chunks. Restarting download from the beginning.");
nF.active = new DownloadInfo(nF);
}
}
try {
// Create the new worker:
DownloadWorker w = DownloadWorker.getDownloadWorker(this, nF.active);
nF.active.worker = w;
workers.add(w);
// Start one of the download chunks present in the info:
for (DownloadChunk c : w.getIncompleteInactiveChunks()) {
w.downloadChunk(c, bestSource, downloadThreadPool);
break;
}
} catch (IOException e) {
Logger.severe("Unable to dispatch a download: " + e);
Logger.log(e);
}
}
private void dispatchLoop() {
while (true) {
long lastIteration = System.currentTimeMillis();
try {
// Logger.log("dispatch: "+lastIteration);
if (mustShutdown) return;
// 1) kill downloads over the limits
clipDownloadCount();
if (mustShutdown) return;
int canQueue = maxActiveSlots - getActiveSlotCount();
// only consider dispatching another if there are free slots:
while (canQueue > 0) {
// 2) dispatch another file: (this means we prefer to give slots to new files rather than
// split existing chunks)
if (!dispatchFile()) break; // stop iterating if the queue is empty.
if (mustShutdown) return;
canQueue--;
}
if (mustShutdown) return;
if (canQueue > 0) { // if there are potentially still slots:
// 3) find chunks ripe for splitting and split and dispatch them:
chunkWorkers();
}
if (mustShutdown) return;
} catch (Exception e) {
Logger.warn("Dispatch iteration failed: " + e);
Logger.log(e);
}
// Throttle this loop so that it does not spin exceedinly fast if there is nothing to do.
long now = System.currentTimeMillis();
long remaining =
(lastIteration + FS2Constants.CLIENT_DOWNLOAD_DISPATCH_ITERATION_THROTTLE) - now;
try {
if (remaining > 0 && !wereCompleteItemsInQueue) {
synchronized (this) {
this.wait(remaining);
}
}
wereCompleteItemsInQueue = false;
} catch (InterruptedException e) {
if (mustShutdown) return;
}
}
}
/**
* Checks if the downloadFile specified has been completed already. This returns true iff: ) file
* exists ) is expected size ) hashes to the same fs2 hash.
*
* @param f
* @return
*/
private boolean downloadFileCompleteOnDisk(DownloadFile f) {
try {
File onDisk = f.getFile();
if (!onDisk.isFile()) return false;
if (onDisk.length() != f.size) return false;
if (!ThrottledFileDigester.fs2DigestFile(onDisk, null).equals(f.hash)) return false;
} catch (Exception e) {
Logger.warn("Couldn't test for file completion on disk: " + e);
Logger.log(e);
return false;
}
return true; // it's already complete!
}
/**
* Check all the merged cells for borders. If the merge record has borders, then we need to rejig
* the cell formats to take account of this. This is called by the write method of the
* WritableWorkbookImpl, so that any new XFRecords that are created may be written out with the
* others
*/
void checkMergedBorders() {
Range[] mcells = mergedCells.getMergedCells();
ArrayList borderFormats = new ArrayList();
for (int mci = 0; mci < mcells.length; mci++) {
Range range = mcells[mci];
Cell topLeft = range.getTopLeft();
XFRecord tlformat = (XFRecord) topLeft.getCellFormat();
if (tlformat != null && tlformat.hasBorders() == true && !tlformat.isRead()) {
try {
CellXFRecord cf1 = new CellXFRecord(tlformat);
Cell bottomRight = range.getBottomRight();
cf1.setBorder(Border.ALL, BorderLineStyle.NONE, Colour.BLACK);
cf1.setBorder(
Border.LEFT,
tlformat.getBorderLine(Border.LEFT),
tlformat.getBorderColour(Border.LEFT));
cf1.setBorder(
Border.TOP, tlformat.getBorderLine(Border.TOP), tlformat.getBorderColour(Border.TOP));
if (topLeft.getRow() == bottomRight.getRow()) {
cf1.setBorder(
Border.BOTTOM,
tlformat.getBorderLine(Border.BOTTOM),
tlformat.getBorderColour(Border.BOTTOM));
}
if (topLeft.getColumn() == bottomRight.getColumn()) {
cf1.setBorder(
Border.RIGHT,
tlformat.getBorderLine(Border.RIGHT),
tlformat.getBorderColour(Border.RIGHT));
}
int index = borderFormats.indexOf(cf1);
if (index != -1) {
cf1 = (CellXFRecord) borderFormats.get(index);
} else {
borderFormats.add(cf1);
}
((WritableCell) topLeft).setCellFormat(cf1);
// Handle the bottom left corner
if (bottomRight.getRow() > topLeft.getRow()) {
// Handle the corner cell
if (bottomRight.getColumn() != topLeft.getColumn()) {
CellXFRecord cf2 = new CellXFRecord(tlformat);
cf2.setBorder(Border.ALL, BorderLineStyle.NONE, Colour.BLACK);
cf2.setBorder(
Border.LEFT,
tlformat.getBorderLine(Border.LEFT),
tlformat.getBorderColour(Border.LEFT));
cf2.setBorder(
Border.BOTTOM,
tlformat.getBorderLine(Border.BOTTOM),
tlformat.getBorderColour(Border.BOTTOM));
index = borderFormats.indexOf(cf2);
if (index != -1) {
cf2 = (CellXFRecord) borderFormats.get(index);
} else {
borderFormats.add(cf2);
}
sheet.addCell(new Blank(topLeft.getColumn(), bottomRight.getRow(), cf2));
}
// Handle the cells down the left hand side (and along the
// right too, if necessary)
for (int i = topLeft.getRow() + 1; i < bottomRight.getRow(); i++) {
CellXFRecord cf3 = new CellXFRecord(tlformat);
cf3.setBorder(Border.ALL, BorderLineStyle.NONE, Colour.BLACK);
cf3.setBorder(
Border.LEFT,
tlformat.getBorderLine(Border.LEFT),
tlformat.getBorderColour(Border.LEFT));
if (topLeft.getColumn() == bottomRight.getColumn()) {
cf3.setBorder(
Border.RIGHT,
tlformat.getBorderLine(Border.RIGHT),
tlformat.getBorderColour(Border.RIGHT));
}
index = borderFormats.indexOf(cf3);
if (index != -1) {
cf3 = (CellXFRecord) borderFormats.get(index);
} else {
borderFormats.add(cf3);
}
sheet.addCell(new Blank(topLeft.getColumn(), i, cf3));
}
}
// Handle the top right corner
if (bottomRight.getColumn() > topLeft.getColumn()) {
if (bottomRight.getRow() != topLeft.getRow()) {
// Handle the corner cell
CellXFRecord cf6 = new CellXFRecord(tlformat);
cf6.setBorder(Border.ALL, BorderLineStyle.NONE, Colour.BLACK);
cf6.setBorder(
Border.RIGHT,
tlformat.getBorderLine(Border.RIGHT),
tlformat.getBorderColour(Border.RIGHT));
cf6.setBorder(
Border.TOP,
tlformat.getBorderLine(Border.TOP),
tlformat.getBorderColour(Border.TOP));
index = borderFormats.indexOf(cf6);
if (index != -1) {
cf6 = (CellXFRecord) borderFormats.get(index);
} else {
borderFormats.add(cf6);
}
sheet.addCell(new Blank(bottomRight.getColumn(), topLeft.getRow(), cf6));
}
// Handle the cells along the right
for (int i = topLeft.getRow() + 1; i < bottomRight.getRow(); i++) {
CellXFRecord cf7 = new CellXFRecord(tlformat);
cf7.setBorder(Border.ALL, BorderLineStyle.NONE, Colour.BLACK);
cf7.setBorder(
Border.RIGHT,
tlformat.getBorderLine(Border.RIGHT),
tlformat.getBorderColour(Border.RIGHT));
index = borderFormats.indexOf(cf7);
if (index != -1) {
cf7 = (CellXFRecord) borderFormats.get(index);
} else {
borderFormats.add(cf7);
}
sheet.addCell(new Blank(bottomRight.getColumn(), i, cf7));
}
// Handle the cells along the top, and along the bottom too
for (int i = topLeft.getColumn() + 1; i < bottomRight.getColumn(); i++) {
CellXFRecord cf8 = new CellXFRecord(tlformat);
cf8.setBorder(Border.ALL, BorderLineStyle.NONE, Colour.BLACK);
cf8.setBorder(
Border.TOP,
tlformat.getBorderLine(Border.TOP),
tlformat.getBorderColour(Border.TOP));
if (topLeft.getRow() == bottomRight.getRow()) {
cf8.setBorder(
Border.BOTTOM,
tlformat.getBorderLine(Border.BOTTOM),
tlformat.getBorderColour(Border.BOTTOM));
}
index = borderFormats.indexOf(cf8);
if (index != -1) {
cf8 = (CellXFRecord) borderFormats.get(index);
} else {
borderFormats.add(cf8);
}
sheet.addCell(new Blank(i, topLeft.getRow(), cf8));
}
}
// Handle the bottom right corner
if (bottomRight.getColumn() > topLeft.getColumn()
|| bottomRight.getRow() > topLeft.getRow()) {
// Handle the corner cell
CellXFRecord cf4 = new CellXFRecord(tlformat);
cf4.setBorder(Border.ALL, BorderLineStyle.NONE, Colour.BLACK);
cf4.setBorder(
Border.RIGHT,
tlformat.getBorderLine(Border.RIGHT),
tlformat.getBorderColour(Border.RIGHT));
cf4.setBorder(
Border.BOTTOM,
tlformat.getBorderLine(Border.BOTTOM),
tlformat.getBorderColour(Border.BOTTOM));
if (bottomRight.getRow() == topLeft.getRow()) {
cf4.setBorder(
Border.TOP,
tlformat.getBorderLine(Border.TOP),
tlformat.getBorderColour(Border.TOP));
}
if (bottomRight.getColumn() == topLeft.getColumn()) {
cf4.setBorder(
Border.LEFT,
tlformat.getBorderLine(Border.LEFT),
tlformat.getBorderColour(Border.LEFT));
}
index = borderFormats.indexOf(cf4);
if (index != -1) {
cf4 = (CellXFRecord) borderFormats.get(index);
} else {
borderFormats.add(cf4);
}
sheet.addCell(new Blank(bottomRight.getColumn(), bottomRight.getRow(), cf4));
// Handle the cells along the bottom (and along the top
// as well, if appropriate)
for (int i = topLeft.getColumn() + 1; i < bottomRight.getColumn(); i++) {
CellXFRecord cf5 = new CellXFRecord(tlformat);
cf5.setBorder(Border.ALL, BorderLineStyle.NONE, Colour.BLACK);
cf5.setBorder(
Border.BOTTOM,
tlformat.getBorderLine(Border.BOTTOM),
tlformat.getBorderColour(Border.BOTTOM));
if (topLeft.getRow() == bottomRight.getRow()) {
cf5.setBorder(
Border.TOP,
tlformat.getBorderLine(Border.TOP),
tlformat.getBorderColour(Border.TOP));
}
index = borderFormats.indexOf(cf5);
if (index != -1) {
cf5 = (CellXFRecord) borderFormats.get(index);
} else {
borderFormats.add(cf5);
}
sheet.addCell(new Blank(i, bottomRight.getRow(), cf5));
}
}
} catch (WriteException e) {
// just log e.toString(), not the whole stack trace
logger.warn(e.toString());
}
}
}
}