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File size: 9,933 Bytes
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package net.minecraft.util.eventlog;
import com.mojang.logging.LogUtils;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;
import java.nio.channels.ReadableByteChannel;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.Objects;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
import javax.annotation.Nullable;
import org.slf4j.Logger;
public class EventLogDirectory {
static final Logger LOGGER = LogUtils.getLogger();
private static final int COMPRESS_BUFFER_SIZE = 4096;
private static final String COMPRESSED_EXTENSION = ".gz";
private final Path root;
private final String extension;
private EventLogDirectory(Path p_261546_, String p_261467_) {
this.root = p_261546_;
this.extension = p_261467_;
}
public static EventLogDirectory open(Path p_261743_, String p_261659_) throws IOException {
Files.createDirectories(p_261743_);
return new EventLogDirectory(p_261743_, p_261659_);
}
public EventLogDirectory.FileList listFiles() throws IOException {
EventLogDirectory.FileList eventlogdirectory$filelist;
try (Stream<Path> stream = Files.list(this.root)) {
eventlogdirectory$filelist = new EventLogDirectory.FileList(
stream.filter(p_262170_ -> Files.isRegularFile(p_262170_)).map(this::parseFile).filter(Objects::nonNull).toList()
);
}
return eventlogdirectory$filelist;
}
@Nullable
private EventLogDirectory.File parseFile(Path p_261985_) {
String s = p_261985_.getFileName().toString();
int i = s.indexOf(46);
if (i == -1) {
return null;
} else {
EventLogDirectory.FileId eventlogdirectory$fileid = EventLogDirectory.FileId.parse(s.substring(0, i));
if (eventlogdirectory$fileid != null) {
String s1 = s.substring(i);
if (s1.equals(this.extension)) {
return new EventLogDirectory.RawFile(p_261985_, eventlogdirectory$fileid);
}
if (s1.equals(this.extension + ".gz")) {
return new EventLogDirectory.CompressedFile(p_261985_, eventlogdirectory$fileid);
}
}
return null;
}
}
static void tryCompress(Path p_261741_, Path p_262101_) throws IOException {
if (Files.exists(p_262101_)) {
throw new IOException("Compressed target file already exists: " + p_262101_);
} else {
try (FileChannel filechannel = FileChannel.open(p_261741_, StandardOpenOption.WRITE, StandardOpenOption.READ)) {
FileLock filelock = filechannel.tryLock();
if (filelock == null) {
throw new IOException("Raw log file is already locked, cannot compress: " + p_261741_);
}
writeCompressed(filechannel, p_262101_);
filechannel.truncate(0L);
}
Files.delete(p_261741_);
}
}
private static void writeCompressed(ReadableByteChannel p_262066_, Path p_262054_) throws IOException {
try (OutputStream outputstream = new GZIPOutputStream(Files.newOutputStream(p_262054_))) {
byte[] abyte = new byte[4096];
ByteBuffer bytebuffer = ByteBuffer.wrap(abyte);
while (p_262066_.read(bytebuffer) >= 0) {
bytebuffer.flip();
outputstream.write(abyte, 0, bytebuffer.limit());
bytebuffer.clear();
}
}
}
public EventLogDirectory.RawFile createNewFile(LocalDate p_261865_) throws IOException {
int i = 1;
Set<EventLogDirectory.FileId> set = this.listFiles().ids();
EventLogDirectory.FileId eventlogdirectory$fileid;
do {
eventlogdirectory$fileid = new EventLogDirectory.FileId(p_261865_, i++);
} while (set.contains(eventlogdirectory$fileid));
EventLogDirectory.RawFile eventlogdirectory$rawfile = new EventLogDirectory.RawFile(
this.root.resolve(eventlogdirectory$fileid.toFileName(this.extension)), eventlogdirectory$fileid
);
Files.createFile(eventlogdirectory$rawfile.path());
return eventlogdirectory$rawfile;
}
public static record CompressedFile(Path path, EventLogDirectory.FileId id) implements EventLogDirectory.File {
@Nullable
@Override
public Reader openReader() throws IOException {
return !Files.exists(this.path) ? null : new BufferedReader(new InputStreamReader(new GZIPInputStream(Files.newInputStream(this.path))));
}
@Override
public EventLogDirectory.CompressedFile compress() {
return this;
}
@Override
public Path path() {
return this.path;
}
@Override
public EventLogDirectory.FileId id() {
return this.id;
}
}
public interface File {
Path path();
EventLogDirectory.FileId id();
@Nullable
Reader openReader() throws IOException;
EventLogDirectory.CompressedFile compress() throws IOException;
}
public static record FileId(LocalDate date, int index) {
private static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.BASIC_ISO_DATE;
@Nullable
public static EventLogDirectory.FileId parse(String p_261762_) {
int i = p_261762_.indexOf("-");
if (i == -1) {
return null;
} else {
String s = p_261762_.substring(0, i);
String s1 = p_261762_.substring(i + 1);
try {
return new EventLogDirectory.FileId(LocalDate.parse(s, DATE_FORMATTER), Integer.parseInt(s1));
} catch (DateTimeParseException | NumberFormatException numberformatexception) {
return null;
}
}
}
@Override
public String toString() {
return DATE_FORMATTER.format(this.date) + "-" + this.index;
}
public String toFileName(String p_261982_) {
return this + p_261982_;
}
}
public static class FileList implements Iterable<EventLogDirectory.File> {
private final List<EventLogDirectory.File> files;
FileList(List<EventLogDirectory.File> p_261941_) {
this.files = new ArrayList<>(p_261941_);
}
public EventLogDirectory.FileList prune(LocalDate p_261825_, int p_261918_) {
this.files.removeIf(p_261494_ -> {
EventLogDirectory.FileId eventlogdirectory$fileid = p_261494_.id();
LocalDate localdate = eventlogdirectory$fileid.date().plusDays((long)p_261918_);
if (!p_261825_.isBefore(localdate)) {
try {
Files.delete(p_261494_.path());
return true;
} catch (IOException ioexception) {
EventLogDirectory.LOGGER.warn("Failed to delete expired event log file: {}", p_261494_.path(), ioexception);
}
}
return false;
});
return this;
}
public EventLogDirectory.FileList compressAll() {
ListIterator<EventLogDirectory.File> listiterator = this.files.listIterator();
while (listiterator.hasNext()) {
EventLogDirectory.File eventlogdirectory$file = listiterator.next();
try {
listiterator.set(eventlogdirectory$file.compress());
} catch (IOException ioexception) {
EventLogDirectory.LOGGER.warn("Failed to compress event log file: {}", eventlogdirectory$file.path(), ioexception);
}
}
return this;
}
@Override
public Iterator<EventLogDirectory.File> iterator() {
return this.files.iterator();
}
public Stream<EventLogDirectory.File> stream() {
return this.files.stream();
}
public Set<EventLogDirectory.FileId> ids() {
return this.files.stream().map(EventLogDirectory.File::id).collect(Collectors.toSet());
}
}
public static record RawFile(Path path, EventLogDirectory.FileId id) implements EventLogDirectory.File {
public FileChannel openChannel() throws IOException {
return FileChannel.open(this.path, StandardOpenOption.WRITE, StandardOpenOption.READ);
}
@Nullable
@Override
public Reader openReader() throws IOException {
return Files.exists(this.path) ? Files.newBufferedReader(this.path) : null;
}
@Override
public EventLogDirectory.CompressedFile compress() throws IOException {
Path path = this.path.resolveSibling(this.path.getFileName().toString() + ".gz");
EventLogDirectory.tryCompress(this.path, path);
return new EventLogDirectory.CompressedFile(path, this.id);
}
@Override
public Path path() {
return this.path;
}
@Override
public EventLogDirectory.FileId id() {
return this.id;
}
}
} |