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8c5b837e05
Firstly, the old methods all routed to the CompletableFuture method. However, the CF method could not guarantee that if the caller was off-main that the future would be "completed" on-main. Since the callback methods used the CF one, this meant that the callback methods did not guarantee that the callbacks were to be called on the main thread. Now, all methods route to getChunkAtAsync(x, z, gen, urgent, cb) so that the methods with the callback are guaranteed to invoke the callback on the main thread. The CF behavior remains unchanged; it may still appear to complete on main if invoked off-main. Secondly, remove the scheduleOnMain invocation in the async chunk completion. This unnecessarily delays the callback by 1 tick. Thirdly, add getChunksAtAsync(minX, minZ, maxX, maxZ, ...) which will load chunks within an area. This method is provided as a helper as keeping all chunks loaded within an area can be complicated to implement for plugins (due to the lacking ticket API), and is already implemented internally anyways. Fourthly, remove the ticket addition that occured with getChunkAt and getChunkAtAsync. The ticket addition may delay the unloading of the chunk unnecessarily. It also fixes a very rare timing bug where the future/callback would be completed after the chunk unloads.
94 lines
4.5 KiB
Diff
94 lines
4.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Sun, 19 Dec 2021 09:13:41 -0800
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Subject: [PATCH] Only write chunk data to disk if it serializes without
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throwing
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This ensures at least a valid version of the chunk exists
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on disk, even if outdated
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diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
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index 12b7d50f49a2184aaf220a4a50a137b217c57124..f1237f6fd6414900ffbad0caee31aa83310eeef4 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
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@@ -442,6 +442,7 @@ public class RegionFile implements AutoCloseable {
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}
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+ public static final int MAX_CHUNK_SIZE = 500 * 1024 * 1024; // Paper - don't write garbage data to disk if writing serialization fails
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private class ChunkBuffer extends ByteArrayOutputStream {
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private final ChunkPos pos;
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@@ -455,6 +456,23 @@ public class RegionFile implements AutoCloseable {
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super.write(RegionFile.this.version.getId());
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this.pos = chunkcoordintpair;
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}
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+ // Paper start - don't write garbage data to disk if writing serialization fails
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+ @Override
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+ public void write(final int b) {
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+ if (this.count > MAX_CHUNK_SIZE) {
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+ throw new RegionFileStorage.RegionFileSizeException("Region file too large: " + this.count);
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+ }
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+ super.write(b);
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+ }
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+
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+ @Override
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+ public void write(final byte[] b, final int off, final int len) {
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+ if (this.count + len > MAX_CHUNK_SIZE) {
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+ throw new RegionFileStorage.RegionFileSizeException("Region file too large: " + (this.count + len));
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+ }
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+ super.write(b, off, len);
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+ }
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+ // Paper end - don't write garbage data to disk if writing serialization fails
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public void close() throws IOException {
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ByteBuffer bytebuffer = ByteBuffer.wrap(this.buf, 0, this.count);
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diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
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index 491035aaefff4ee96435ec5d3f9417e28eae0796..4c1212c6ef48594e766fa9e35a6e15916602d587 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
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@@ -147,10 +147,17 @@ public final class RegionFileStorage implements AutoCloseable {
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try {
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NbtIo.write(nbt, (DataOutput) dataoutputstream);
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+ // Paper start - don't write garbage data to disk if writing serialization fails
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+ dataoutputstream.close(); // Only write if successful
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+ } catch (final RegionFileSizeException e) {
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+ attempts = 5; // Don't retry
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+ regionfile.clear(pos);
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+ throw e;
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+ // Paper end - don't write garbage data to disk if writing serialization fails
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} catch (Throwable throwable) {
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if (dataoutputstream != null) {
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try {
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- dataoutputstream.close();
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+ //dataoutputstream.close(); // Paper - don't write garbage data to disk if writing serialization fails
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} catch (Throwable throwable1) {
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throwable.addSuppressed(throwable1);
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}
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@@ -158,10 +165,7 @@ public final class RegionFileStorage implements AutoCloseable {
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throw throwable;
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}
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-
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- if (dataoutputstream != null) {
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- dataoutputstream.close();
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- }
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+ // Paper - don't write garbage data to disk if writing serialization fails; move into try block to only write if successfully serialized
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}
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// Paper start - Chunk save reattempt
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return;
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@@ -208,4 +212,13 @@ public final class RegionFileStorage implements AutoCloseable {
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public RegionStorageInfo info() {
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return this.info;
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}
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+
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+ // Paper start - don't write garbage data to disk if writing serialization fails
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+ public static final class RegionFileSizeException extends RuntimeException {
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+
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+ public RegionFileSizeException(String message) {
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+ super(message);
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+ }
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+ }
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+ // Paper end - don't write garbage data to disk if writing serialization fails
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}
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