public long writeCommit(CommitUpdateCommand cmd, int flags) {
LogCodec codec = new LogCodec(resolver);
synchronized (this) {
try {
long pos = fos.size(); // if we had flushed, this should be equal to channel.position()
if (pos == 0) {
writeLogHeader(codec);
pos = fos.size();
}
codec.init(fos);
codec.writeTag(JavaBinCodec.ARR, 3);
codec.writeInt(UpdateLog.COMMIT | flags); // should just take one byte
codec.writeLong(cmd.getVersion());
codec.writeStr(END_MESSAGE); // ensure these bytes are (almost) last in the file
endRecord(pos);
fos.flush(); // flush since this will be the last record in a log fill
assert fos.size() == channel.size();
return pos;
} catch (IOException e) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, e);
}
}
}
public static void writeVLong(long i, FastOutputStream out) throws IOException {
while ((i & ~0x7F) != 0) {
out.writeByte((byte) ((i & 0x7f) | 0x80));
i >>>= 7;
}
out.writeByte((byte) i);
}
protected void close() {
try {
if (debug) {
log.debug("Closing tlog" + this);
}
synchronized (this) {
fos.flush();
fos.close();
}
if (deleteOnClose) {
try {
Files.deleteIfExists(tlogFile.toPath());
} catch (IOException e) {
// TODO: should this class care if a file couldnt be deleted?
// this just emulates previous behavior, where only SecurityException would be handled.
}
}
} catch (IOException e) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, e);
} finally {
assert ObjectReleaseTracker.release(this);
}
}
// 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;
}
}
public void marshal(Object nl, OutputStream os) throws IOException {
assert !alreadyMarshalled;
init(FastOutputStream.wrap(os));
try {
daos.writeByte(VERSION);
writeVal(nl);
} finally {
daos.flushBuffer();
alreadyMarshalled = true;
}
}
public void writeTag(byte tag, int size) throws IOException {
if ((tag & 0xe0) != 0) {
if (size < 0x1f) {
daos.writeByte(tag | size);
} else {
daos.writeByte(tag | 0x1f);
writeVInt(size - 0x1f, daos);
}
} else {
daos.writeByte(tag);
writeVInt(size, daos);
}
}
private void checkWriteHeader(LogCodec codec, SolrInputDocument optional) throws IOException {
// Unsynchronized access. We can get away with an unsynchronized access here
// since we will never get a false non-zero when the position is in fact 0.
// rollback() is the only function that can reset to zero, and it blocks updates.
if (fos.size() != 0) return;
synchronized (this) {
if (fos.size() != 0) return; // check again while synchronized
if (optional != null) {
addGlobalStrings(optional.getFieldNames());
}
writeLogHeader(codec);
}
}
public void writeLong(long val) throws IOException {
if ((val & 0xff00000000000000L) == 0) {
int b = SLONG | ((int) val & 0x0f);
if (val >= 0x0f) {
b |= 0x10;
daos.writeByte(b);
writeVLong(val >>> 4, daos);
} else {
daos.writeByte(b);
}
} else {
daos.writeByte(LONG);
daos.writeLong(val);
}
}
public long writeDelete(DeleteUpdateCommand cmd, int flags) {
LogCodec codec = new LogCodec(resolver);
try {
checkWriteHeader(codec, null);
BytesRef br = cmd.getIndexedId();
MemOutputStream out = new MemOutputStream(new byte[20 + br.length]);
codec.init(out);
codec.writeTag(JavaBinCodec.ARR, 3);
codec.writeInt(UpdateLog.DELETE | flags); // should just take one byte
codec.writeLong(cmd.getVersion());
codec.writeByteArray(br.bytes, br.offset, br.length);
synchronized (this) {
long pos = fos.size(); // if we had flushed, this should be equal to channel.position()
assert pos != 0;
out.writeAll(fos);
endRecord(pos);
// fos.flushBuffer(); // flush later
return pos;
}
} catch (IOException e) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, e);
}
}
/**
* takes a snapshot of the current position and number of records for later possible rollback, and
* returns the position
*/
public long snapshot() {
synchronized (this) {
snapshot_size = fos.size();
snapshot_numRecords = numRecords;
return snapshot_size;
}
}
/* This method is thread safe */
public Object lookup(long pos) {
// A negative position can result from a log replay (which does not re-log, but does
// update the version map. This is OK since the node won't be ACTIVE when this happens.
if (pos < 0) return null;
try {
// make sure any unflushed buffer has been flushed
synchronized (this) {
// TODO: optimize this by keeping track of what we have flushed up to
fos.flushBuffer();
/**
* * System.out.println("###flushBuffer to " + fos.size() + " raf.length()=" + raf.length()
* + " pos="+pos); if (fos.size() != raf.length() || pos >= fos.size() ) { throw new
* RuntimeException("ERROR" + "###flushBuffer to " + fos.size() + " raf.length()=" +
* raf.length() + " pos="+pos); } *
*/
}
ChannelFastInputStream fis = new ChannelFastInputStream(channel, pos);
LogCodec codec = new LogCodec(resolver);
return codec.readVal(fis);
} catch (IOException e) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, e);
}
}
public void writeInt(int val) throws IOException {
if (val > 0) {
int b = SINT | (val & 0x0f);
if (val >= 0x0f) {
b |= 0x10;
daos.writeByte(b);
writeVInt(val >>> 4, daos);
} else {
daos.writeByte(b);
}
} else {
daos.writeByte(INT);
daos.writeInt(val);
}
}
public boolean endsWithCommit() throws IOException {
long size;
synchronized (this) {
fos.flush();
size = fos.size();
}
// the end of the file should have the end message (added during a commit) plus a 4 byte size
byte[] buf = new byte[END_MESSAGE.length()];
long pos = size - END_MESSAGE.length() - 4;
if (pos < 0) return false;
ChannelFastInputStream is = new ChannelFastInputStream(channel, pos);
is.read(buf);
for (int i = 0; i < buf.length; i++) {
if (buf[i] != END_MESSAGE.charAt(i)) return false;
}
return true;
}
protected void writeLogHeader(LogCodec codec) throws IOException {
long pos = fos.size();
assert pos == 0;
Map header = new LinkedHashMap<String, Object>();
header.put("SOLR_TLOG", 1); // a magic string + version number
header.put("strings", globalStringList);
codec.marshal(header, fos);
endRecord(pos);
}
public long writeData(Object o) {
LogCodec codec = new LogCodec(resolver);
try {
long pos = fos.size(); // if we had flushed, this should be equal to channel.position()
codec.init(fos);
codec.writeVal(o);
return pos;
} catch (IOException e) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, e);
}
}
@Test
public void testgzip() throws Exception {
ByteArrayOutputStream b = new ByteArrayOutputStream();
FastOutputStream fos = new FastOutputStream(b);
GZIPOutputStream gzos = new GZIPOutputStream(fos);
String ss = "Helloooooooooooooooooooo";
writeChars(gzos, ss, 0, ss.length());
gzos.close();
JavaBinCodec.writeVInt(10, fos);
fos.flushBuffer();
GZIPInputStream gzis =
new GZIPInputStream(new ByteArrayInputStream(b.toByteArray(), 0, b.size()));
char[] cbuf = new char[ss.length()];
readChars(gzis, cbuf, 0, ss.length());
assertEquals(new String(cbuf), ss);
// System.out.println("passes w/o FastInputStream");
ByteArrayInputStream bis = new ByteArrayInputStream(b.toByteArray(), 0, b.size());
gzis = new GZIPInputStream(new FastInputStream(bis));
cbuf = new char[ss.length()];
readChars(gzis, cbuf, 0, ss.length());
assertEquals(new String(cbuf), ss);
// System.out.println("passes w FastInputStream");
}
public void finish(UpdateLog.SyncLevel syncLevel) {
if (syncLevel == UpdateLog.SyncLevel.NONE) return;
try {
synchronized (this) {
fos.flushBuffer();
}
if (syncLevel == UpdateLog.SyncLevel.FSYNC) {
// Since fsync is outside of synchronized block, we can end up with a partial
// last record on power failure (which is OK, and does not represent an error...
// we just need to be aware of it when reading).
raf.getFD().sync();
}
} catch (IOException e) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, e);
}
}
/** write the string as tag+length, with length being the number of UTF-8 bytes */
public void writeStr(String s) throws IOException {
if (s == null) {
writeTag(NULL);
return;
}
int end = s.length();
int maxSize = end * ByteUtils.MAX_UTF8_BYTES_PER_CHAR;
if (maxSize <= MAX_UTF8_SIZE_FOR_ARRAY_GROW_STRATEGY) {
if (bytes == null || bytes.length < maxSize) bytes = new byte[maxSize];
int sz = ByteUtils.UTF16toUTF8(s, 0, end, bytes, 0);
writeTag(STR, sz);
daos.write(bytes, 0, sz);
} else {
// double pass logic for large strings, see SOLR-7971
int sz = ByteUtils.calcUTF16toUTF8Length(s, 0, end);
writeTag(STR, sz);
if (bytes == null || bytes.length < 8192) bytes = new byte[8192];
ByteUtils.writeUTF16toUTF8(s, 0, end, daos, bytes);
}
}
public long write(AddUpdateCommand cmd, int flags) {
LogCodec codec = new LogCodec(resolver);
SolrInputDocument sdoc = cmd.getSolrInputDocument();
try {
checkWriteHeader(codec, sdoc);
// adaptive buffer sizing
int bufSize = lastAddSize; // unsynchronized access of lastAddSize should be fine
bufSize = Math.min(1024 * 1024, bufSize + (bufSize >> 3) + 256);
MemOutputStream out = new MemOutputStream(new byte[bufSize]);
codec.init(out);
codec.writeTag(JavaBinCodec.ARR, 3);
codec.writeInt(UpdateLog.ADD | flags); // should just take one byte
codec.writeLong(cmd.getVersion());
codec.writeSolrInputDocument(cmd.getSolrInputDocument());
lastAddSize = (int) out.size();
synchronized (this) {
long pos = fos.size(); // if we had flushed, this should be equal to channel.position()
assert pos != 0;
/**
* * System.out.println("###writing at " + pos + " fos.size()=" + fos.size() + "
* raf.length()=" + raf.length()); if (pos != fos.size()) { throw new
* RuntimeException("ERROR" + "###writing at " + pos + " fos.size()=" + fos.size() + "
* raf.length()=" + raf.length()); } *
*/
out.writeAll(fos);
endRecord(pos);
// fos.flushBuffer(); // flush later
return pos;
}
} catch (IOException e) {
// TODO: reset our file pointer back to "pos", the start of this record.
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "Error logging add", e);
}
}
public long writeDeleteByQuery(DeleteUpdateCommand cmd, int flags) {
LogCodec codec = new LogCodec(resolver);
try {
checkWriteHeader(codec, null);
MemOutputStream out = new MemOutputStream(new byte[20 + (cmd.query.length())]);
codec.init(out);
codec.writeTag(JavaBinCodec.ARR, 3);
codec.writeInt(UpdateLog.DELETE_BY_QUERY | flags); // should just take one byte
codec.writeLong(cmd.getVersion());
codec.writeStr(cmd.query);
synchronized (this) {
long pos = fos.size(); // if we had flushed, this should be equal to channel.position()
out.writeAll(fos);
endRecord(pos);
// fos.flushBuffer(); // flush later
return pos;
}
} catch (IOException e) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, e);
}
}
public boolean writePrimitive(Object val) throws IOException {
if (val == null) {
daos.writeByte(NULL);
return true;
} else if (val instanceof String) {
writeStr((String) val);
return true;
} else if (val instanceof Number) {
if (val instanceof Integer) {
writeInt(((Integer) val).intValue());
return true;
} else if (val instanceof Long) {
writeLong(((Long) val).longValue());
return true;
} else if (val instanceof Float) {
writeFloat(((Float) val).floatValue());
return true;
} else if (val instanceof Double) {
daos.writeByte(DOUBLE);
daos.writeDouble(((Double) val).doubleValue());
return true;
} else if (val instanceof Byte) {
daos.writeByte(BYTE);
daos.writeByte(((Byte) val).intValue());
return true;
} else if (val instanceof Short) {
daos.writeByte(SHORT);
daos.writeShort(((Short) val).intValue());
return true;
}
return false;
} else if (val instanceof Date) {
daos.writeByte(DATE);
daos.writeLong(((Date) val).getTime());
return true;
} else if (val instanceof Boolean) {
if ((Boolean) val) daos.writeByte(BOOL_TRUE);
else daos.writeByte(BOOL_FALSE);
return true;
} else if (val instanceof byte[]) {
writeByteArray((byte[]) val, 0, ((byte[]) val).length);
return true;
} else if (val instanceof ByteBuffer) {
ByteBuffer buf = (ByteBuffer) val;
writeByteArray(buf.array(), buf.position(), buf.limit() - buf.position());
return true;
} else if (val == END_OBJ) {
writeTag(END);
return true;
}
return false;
}
public void writeFloat(float val) throws IOException {
daos.writeByte(FLOAT);
daos.writeFloat(val);
}
protected void endRecord(long startRecordPosition) throws IOException {
fos.writeInt((int) (fos.size() - startRecordPosition));
numRecords++;
}
public void writeByteArray(byte[] arr, int offset, int len) throws IOException {
writeTag(BYTEARR, len);
daos.write(arr, offset, len);
}
public void writeTag(byte tag) throws IOException {
daos.writeByte(tag);
}
/** returns the current position in the log file */
public long position() {
synchronized (this) {
return fos.size();
}
}
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);
}
}
}
}
