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* better account for large history files

This commit is contained in:
Reinhard Pointner 2013-11-17 19:05:45 +00:00
parent 1c89f8c3ef
commit f4070a4c07
1 changed files with 21 additions and 31 deletions
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52
source/net/sourceforge/filebot/HistorySpooler.java
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@ -1,7 +1,5 @@
package net.sourceforge.filebot;
import static net.sourceforge.filebot.Settings.*;
import java.io.File;
@ -19,35 +17,32 @@ import net.sourceforge.filebot.History.Element;
import net.sourceforge.tuned.ByteBufferInputStream;
import net.sourceforge.tuned.ByteBufferOutputStream;
public final class HistorySpooler {
private static final HistorySpooler instance = new HistorySpooler();
public static HistorySpooler getInstance() {
return instance;
}
private File persistentHistoryFile = new File(getApplicationFolder(), "history.xml");
private int persistentHistoryTotalSize = -1;
private boolean persistentHistoryEnabled = true;
private History sessionHistory = new History();
public synchronized History getCompleteHistory() throws IOException {
if (!persistentHistoryEnabled || persistentHistoryFile.length() <= 0) {
return new History();
}
RandomAccessFile f = new RandomAccessFile(persistentHistoryFile, "rw");
FileChannel channel = f.getChannel();
FileLock lock = channel.lock();
try {
ByteBufferOutputStream data = new ByteBufferOutputStream(f.length());
data.transferFully(channel);
History history = History.importHistory(new ByteBufferInputStream(data.getByteBuffer()));
history.addAll(sessionHistory.sequences());
return history;
@ -57,13 +52,12 @@ public final class HistorySpooler {
f.close();
}
}
public synchronized void commit() {
if (!persistentHistoryEnabled || sessionHistory.sequences().isEmpty()) {
return;
}
try {
if (persistentHistoryFile.length() <= 0) {
persistentHistoryFile.createNewFile();
@ -72,18 +66,18 @@ public final class HistorySpooler {
FileChannel channel = f.getChannel();
FileLock lock = channel.lock();
try {
ByteBufferOutputStream data = new ByteBufferOutputStream(f.length());
ByteBufferOutputStream data = new ByteBufferOutputStream((int) (f.length() > 0 ? f.length() : 1024), 0.2f);
int read = data.transferFully(channel);
History history = read > 0 ? History.importHistory(new ByteBufferInputStream(data.getByteBuffer())) : new History();
history.addAll(sessionHistory.sequences());
data.rewind();
History.exportHistory(history, data);
channel.position(0);
channel.write(data.getByteBuffer());
sessionHistory.clear();
persistentHistoryTotalSize = history.totalSize();
} catch (Exception e) {
@ -97,34 +91,30 @@ public final class HistorySpooler {
Logger.getLogger(getClass().getName()).log(Level.SEVERE, "Failed to write rename history.", e);
}
}
public synchronized void append(Iterable<Entry<File, File>> elements) {
List<Element> sequence = new ArrayList<Element>();
for (Entry<File, File> element : elements) {
sequence.add(new Element(element.getKey().getName(), element.getValue().getPath(), element.getKey().getParentFile()));
}
// append to session history
if (sequence.size() > 0) {
sessionHistory.add(sequence);
}
}
public History getSessionHistory() {
return sessionHistory;
}
public int getPersistentHistoryTotalSize() {
return persistentHistoryTotalSize;
}
public void setPersistentHistoryEnabled(boolean persistentHistoryEnabled) {
this.persistentHistoryEnabled = persistentHistoryEnabled;
}
}