@Override
protected ApacheLogEntry prefetch() throws Exception {
while (sortedBuffer.size() < maxSortedBufferSize) {
if (itEntry == null) {
if (itFile.hasNext()) {
itEntry = new ApacheLogEntryIterator(LogDirectory.open(itFile.next().getValue()), true);
} else {
break;
}
}
if (!itEntry.hasNext()) {
itEntry = null;
continue;
}
ApacheLogEntry entry = itEntry.next();
if (low != null) {
int d = entry.getDate().compareTo(low);
if (d < 0 || (d == 0 && !lowInclusive)) {
continue;
}
}
sortedBuffer.put(entry.getDate(), entry);
}
if (!sortedBuffer.isEmpty()) {
ApacheLogEntry entry = sortedBuffer.pollFirstEntry().getValue();
if (sanityCheckMonotonictyDate != null) {
if (sanityCheckMonotonictyDate.compareTo(entry.getDate()) > 0) {
throw new RuntimeException("Dates are not monoton");
}
}
sanityCheckMonotonictyDate = entry.getDate();
if (high != null) {
int d = high.compareTo(entry.getDate());
if (d < 0 || (d == 0 && !highInclusive)) {
return finish();
}
}
return entry;
}
return finish();
}
public LogDirectory(File dir, Pattern pattern) throws IOException {
if (!dir.isDirectory()) {
throw new IllegalArgumentException("Argument must be a directory, got: " + dir);
}
// Read the date from the first line of each file, and sort the files
// accordingly
for (File file : dir.listFiles(new PatternFilenameFilter(pattern))) {
ApacheLogEntryIterator it = new ApacheLogEntryIterator(open(file), true);
while (it.hasNext()) {
Date date = it.next().getDate();
// logger.debug("Found log file " + file.getAbsolutePath() + " with date " + date);
dateToFile.put(date, file);
it.close();
break;
}
}
logger.debug("Found log files: " + dateToFile);
}
@Override
public void close() {
if (itEntry != null) {
itEntry.close();
}
}