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File size: 10,699 Bytes
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package net.minecraft.data;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableMap.Builder;
import com.google.common.hash.HashCode;
import com.google.common.hash.Hashing;
import com.mojang.logging.LogUtils;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.Map.Entry;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.atomic.AtomicInteger;
import javax.annotation.Nullable;
import net.minecraft.WorldVersion;
import org.apache.commons.lang3.mutable.MutableInt;
import org.slf4j.Logger;
public class HashCache {
static final Logger LOGGER = LogUtils.getLogger();
private static final String HEADER_MARKER = "// ";
private final Path rootDir;
private final Path cacheDir;
private final String versionId;
private final Map<String, HashCache.ProviderCache> caches;
private final Set<String> cachesToWrite = new HashSet<>();
final Set<Path> cachePaths = new HashSet<>();
private final int initialCount;
private int writes;
private Path getProviderCachePath(String p_254395_) {
return this.cacheDir.resolve(Hashing.sha1().hashString(p_254395_, StandardCharsets.UTF_8).toString());
}
public HashCache(Path p_236087_, Collection<String> p_253748_, WorldVersion p_236089_) throws IOException {
this.versionId = p_236089_.getName();
this.rootDir = p_236087_;
this.cacheDir = p_236087_.resolve(".cache");
Files.createDirectories(this.cacheDir);
Map<String, HashCache.ProviderCache> map = new HashMap<>();
int i = 0;
for (String s : p_253748_) {
Path path = this.getProviderCachePath(s);
this.cachePaths.add(path);
HashCache.ProviderCache hashcache$providercache = readCache(p_236087_, path);
map.put(s, hashcache$providercache);
i += hashcache$providercache.count();
}
this.caches = map;
this.initialCount = i;
}
private static HashCache.ProviderCache readCache(Path p_236093_, Path p_236094_) {
if (Files.isReadable(p_236094_)) {
try {
return HashCache.ProviderCache.load(p_236093_, p_236094_);
} catch (Exception exception) {
LOGGER.warn("Failed to parse cache {}, discarding", p_236094_, exception);
}
}
return new HashCache.ProviderCache("unknown", ImmutableMap.of());
}
public boolean shouldRunInThisVersion(String p_254319_) {
HashCache.ProviderCache hashcache$providercache = this.caches.get(p_254319_);
return hashcache$providercache == null || !hashcache$providercache.version.equals(this.versionId);
}
public CompletableFuture<HashCache.UpdateResult> generateUpdate(String p_253944_, HashCache.UpdateFunction p_254321_) {
HashCache.ProviderCache hashcache$providercache = this.caches.get(p_253944_);
if (hashcache$providercache == null) {
throw new IllegalStateException("Provider not registered: " + p_253944_);
} else {
HashCache.CacheUpdater hashcache$cacheupdater = new HashCache.CacheUpdater(p_253944_, this.versionId, hashcache$providercache);
return p_254321_.update(hashcache$cacheupdater).thenApply(p_253376_ -> hashcache$cacheupdater.close());
}
}
public void applyUpdate(HashCache.UpdateResult p_253725_) {
this.caches.put(p_253725_.providerId(), p_253725_.cache());
this.cachesToWrite.add(p_253725_.providerId());
this.writes = this.writes + p_253725_.writes();
}
public void purgeStaleAndWrite() throws IOException {
final Set<Path> set = new HashSet<>();
this.caches.forEach((p_253378_, p_253379_) -> {
if (this.cachesToWrite.contains(p_253378_)) {
Path path = this.getProviderCachePath(p_253378_);
p_253379_.save(this.rootDir, path, DateTimeFormatter.ISO_LOCAL_DATE_TIME.format(LocalDateTime.now()) + "\t" + p_253378_);
}
set.addAll(p_253379_.data().keySet());
});
set.add(this.rootDir.resolve("version.json"));
final MutableInt mutableint = new MutableInt();
final MutableInt mutableint1 = new MutableInt();
Files.walkFileTree(this.rootDir, new SimpleFileVisitor<Path>() {
public FileVisitResult visitFile(Path p_335518_, BasicFileAttributes p_328145_) {
if (HashCache.this.cachePaths.contains(p_335518_)) {
return FileVisitResult.CONTINUE;
} else {
mutableint.increment();
if (set.contains(p_335518_)) {
return FileVisitResult.CONTINUE;
} else {
try {
Files.delete(p_335518_);
} catch (IOException ioexception) {
HashCache.LOGGER.warn("Failed to delete file {}", p_335518_, ioexception);
}
mutableint1.increment();
return FileVisitResult.CONTINUE;
}
}
}
});
LOGGER.info(
"Caching: total files: {}, old count: {}, new count: {}, removed stale: {}, written: {}",
mutableint,
this.initialCount,
set.size(),
mutableint1,
this.writes
);
}
static class CacheUpdater implements CachedOutput {
private final String provider;
private final HashCache.ProviderCache oldCache;
private final HashCache.ProviderCacheBuilder newCache;
private final AtomicInteger writes = new AtomicInteger();
private volatile boolean closed;
CacheUpdater(String p_253971_, String p_254002_, HashCache.ProviderCache p_254244_) {
this.provider = p_253971_;
this.oldCache = p_254244_;
this.newCache = new HashCache.ProviderCacheBuilder(p_254002_);
}
private boolean shouldWrite(Path p_236120_, HashCode p_236121_) {
return !Objects.equals(this.oldCache.get(p_236120_), p_236121_) || !Files.exists(p_236120_);
}
@Override
public void writeIfNeeded(Path p_236123_, byte[] p_236124_, HashCode p_236125_) throws IOException {
if (this.closed) {
throw new IllegalStateException("Cannot write to cache as it has already been closed");
} else {
if (this.shouldWrite(p_236123_, p_236125_)) {
this.writes.incrementAndGet();
Files.createDirectories(p_236123_.getParent());
Files.write(p_236123_, p_236124_);
}
this.newCache.put(p_236123_, p_236125_);
}
}
public HashCache.UpdateResult close() {
this.closed = true;
return new HashCache.UpdateResult(this.provider, this.newCache.build(), this.writes.get());
}
}
static record ProviderCache(String version, ImmutableMap<Path, HashCode> data) {
@Nullable
public HashCode get(Path p_236135_) {
return this.data.get(p_236135_);
}
public int count() {
return this.data.size();
}
public static HashCache.ProviderCache load(Path p_236140_, Path p_236141_) throws IOException {
HashCache.ProviderCache hashcache$providercache;
try (BufferedReader bufferedreader = Files.newBufferedReader(p_236141_, StandardCharsets.UTF_8)) {
String s = bufferedreader.readLine();
if (!s.startsWith("// ")) {
throw new IllegalStateException("Missing cache file header");
}
String[] astring = s.substring("// ".length()).split("\t", 2);
String s1 = astring[0];
Builder<Path, HashCode> builder = ImmutableMap.builder();
bufferedreader.lines().forEach(p_253382_ -> {
int i = p_253382_.indexOf(32);
builder.put(p_236140_.resolve(p_253382_.substring(i + 1)), HashCode.fromString(p_253382_.substring(0, i)));
});
hashcache$providercache = new HashCache.ProviderCache(s1, builder.build());
}
return hashcache$providercache;
}
public void save(Path p_236143_, Path p_236144_, String p_236145_) {
try (BufferedWriter bufferedwriter = Files.newBufferedWriter(p_236144_, StandardCharsets.UTF_8)) {
bufferedwriter.write("// ");
bufferedwriter.write(this.version);
bufferedwriter.write(9);
bufferedwriter.write(p_236145_);
bufferedwriter.newLine();
for (Entry<Path, HashCode> entry : this.data.entrySet()) {
bufferedwriter.write(entry.getValue().toString());
bufferedwriter.write(32);
bufferedwriter.write(p_236143_.relativize(entry.getKey()).toString());
bufferedwriter.newLine();
}
} catch (IOException ioexception) {
HashCache.LOGGER.warn("Unable write cachefile {}: {}", p_236144_, ioexception);
}
}
}
static record ProviderCacheBuilder(String version, ConcurrentMap<Path, HashCode> data) {
ProviderCacheBuilder(String p_254186_) {
this(p_254186_, new ConcurrentHashMap<>());
}
public void put(Path p_254121_, HashCode p_254288_) {
this.data.put(p_254121_, p_254288_);
}
public HashCache.ProviderCache build() {
return new HashCache.ProviderCache(this.version, ImmutableMap.copyOf(this.data));
}
}
@FunctionalInterface
public interface UpdateFunction {
CompletableFuture<?> update(CachedOutput p_253936_);
}
public static record UpdateResult(String providerId, HashCache.ProviderCache cache, int writes) {
}
} |