// This could mess with any readers or reverse readers that are open, or anything that might try
// to do a log lookup.
// This should only be used to roll back buffered updates, not actually applied updates.
public void rollback(long pos) throws IOException {
synchronized (this) {
assert snapshot_size == pos;
fos.flush();
raf.setLength(pos);
fos.setWritten(pos);
assert fos.size() == pos;
numRecords = snapshot_numRecords;
}
}
TransactionLog(File tlogFile, Collection<String> globalStrings, boolean openExisting) {
boolean success = false;
try {
if (debug) {
log.debug(
"New TransactionLog file="
+ tlogFile
+ ", exists="
+ tlogFile.exists()
+ ", size="
+ tlogFile.length()
+ ", openExisting="
+ openExisting);
}
this.tlogFile = tlogFile;
raf = new RandomAccessFile(this.tlogFile, "rw");
long start = raf.length();
channel = raf.getChannel();
os = Channels.newOutputStream(channel);
fos = new FastOutputStream(os, new byte[65536], 0);
// fos = FastOutputStream.wrap(os);
if (openExisting) {
if (start > 0) {
readHeader(null);
raf.seek(start);
assert channel.position() == start;
fos.setWritten(start); // reflect that we aren't starting at the beginning
assert fos.size() == channel.size();
} else {
addGlobalStrings(globalStrings);
}
} else {
if (start > 0) {
log.warn("New transaction log already exists:" + tlogFile + " size=" + raf.length());
return;
}
if (start > 0) {
raf.setLength(0);
}
addGlobalStrings(globalStrings);
}
success = true;
assert ObjectReleaseTracker.track(this);
} catch (IOException e) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, e);
} finally {
if (!success && raf != null) {
try {
raf.close();
} catch (Exception e) {
log.error("Error closing tlog file (after error opening)", e);
}
}
}
}
