andreacavalli/FileSponge
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Fix refcounts

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This commit is contained in:
Andrea Cavalli 2021-05-16 14:59:12 +02:00
parent d6c591d397
commit bce04a20a4
1 changed files with 84 additions and 53 deletions
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137
src/main/lombok/org/warp/filesponge/DiskCache.java
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@ -32,6 +32,7 @@ import it.cavallium.dbengine.database.LLDictionaryResultType;
import it.cavallium.dbengine.database.LLKeyValueDatabase;
import it.cavallium.dbengine.database.UpdateMode;
import it.cavallium.dbengine.database.UpdateReturnMode;
import it.cavallium.dbengine.database.disk.LLLocalDictionary.ReleasableSlice;
import it.unimi.dsi.fastutil.booleans.BooleanArrayList;
import java.nio.ByteBuffer;
import java.util.Arrays;
@ -76,17 +77,22 @@ public class DiskCache implements URLsDiskHandler, URLsWriter {
@Override
public Mono<Void> writeMetadata(URL url, Metadata metadata) {
return fileMetadata
.update(url.getSerializer(db.getAllocator()).serialize(url), oldValue -> {
if (oldValue != null) {
return oldValue;
} else {
return diskMetadataSerializer.serialize(new DiskMetadata(
metadata.getSize(),
BooleanArrayList.wrap(new boolean[DiskMetadata.getBlocksCount(metadata.getSize(), BLOCK_SIZE)])
));
}
}, UpdateReturnMode.NOTHING)
return Mono
.using(
() -> url.getSerializer(db.getAllocator()).serialize(url),
key -> fileMetadata
.update(key.retain(), oldValue -> {
if (oldValue != null) {
return oldValue;
} else {
return diskMetadataSerializer.serialize(new DiskMetadata(
metadata.getSize(),
BooleanArrayList.wrap(new boolean[DiskMetadata.getBlocksCount(metadata.getSize(), BLOCK_SIZE)])
));
}
}, UpdateReturnMode.NOTHING),
ReferenceCounted::release
)
.then();
}
@ -95,31 +101,42 @@ public class DiskCache implements URLsDiskHandler, URLsWriter {
return Mono
.fromCallable(dataBlock::getData)
.subscribeOn(Schedulers.boundedElastic())
.flatMap(bytes -> fileContent
.put(getBlockKey(url, dataBlock.getId()), bytes, LLDictionaryResultType.VOID)
.flatMap(bytes -> Mono
.using(
() -> getBlockKey(url, dataBlock.getId()),
key -> fileContent
.put(key.retain(), bytes, LLDictionaryResultType.VOID),
ReferenceCounted::release
)
.doOnNext(ReferenceCounted::release)
.then()
)
.then(fileMetadata.update(url.getSerializer(db.getAllocator()).serialize(url), prevBytes -> {
@Nullable DiskMetadata result;
if (prevBytes != null) {
DiskMetadata prevMeta = diskMetadataSerializer.deserialize(prevBytes);
if (!prevMeta.getDownloadedBlocks().getBoolean(dataBlock.getId())) {
BooleanArrayList bal = prevMeta.getDownloadedBlocks().clone();
bal.set(dataBlock.getId(), true);
result = new DiskMetadata(prevMeta.getSize(), bal);
} else {
result = prevMeta;
}
} else {
result = null;
}
if (result != null) {
return diskMetadataSerializer.serialize(result);
} else {
return null;
}
}, UpdateReturnMode.NOTHING))
.then(Mono
.using(
() -> url.getSerializer(db.getAllocator()).serialize(url),
key -> fileMetadata.update(key.retain(), prevBytes -> {
@Nullable DiskMetadata result;
if (prevBytes != null) {
DiskMetadata prevMeta = diskMetadataSerializer.deserialize(prevBytes);
if (!prevMeta.getDownloadedBlocks().getBoolean(dataBlock.getId())) {
BooleanArrayList bal = prevMeta.getDownloadedBlocks().clone();
bal.set(dataBlock.getId(), true);
result = new DiskMetadata(prevMeta.getSize(), bal);
} else {
result = prevMeta;
}
} else {
result = null;
}
if (result != null) {
return diskMetadataSerializer.serialize(result);
} else {
return null;
}
}, UpdateReturnMode.NOTHING),
ReferenceCounted::release
)
)
.then();
}
@ -137,23 +154,29 @@ public class DiskCache implements URLsDiskHandler, URLsWriter {
if (!downloaded) {
return Mono.<DataBlock>empty();
}
return fileContent.get(null, getBlockKey(url, blockId)).map(data -> {
try {
int blockOffset = getBlockOffset(blockId);
int blockLength = data.readableBytes();
if (blockOffset + blockLength >= meta.getSize()) {
if (blockOffset + blockLength > meta.getSize()) {
throw new IllegalStateException("Overflowed data size");
return Mono
.using(
() -> getBlockKey(url, blockId),
key -> fileContent.get(null, key.retain()),
ReferenceCounted::release
)
.map(data -> {
try {
int blockOffset = getBlockOffset(blockId);
int blockLength = data.readableBytes();
if (blockOffset + blockLength >= meta.getSize()) {
if (blockOffset + blockLength > meta.getSize()) {
throw new IllegalStateException("Overflowed data size");
}
} else {
// Intermediate blocks must be of max size
assert data.readableBytes() == BLOCK_SIZE;
}
return new DataBlock(blockOffset, blockLength, data.retain());
} finally {
data.release();
}
} else {
// Intermediate blocks must be of max size
assert data.readableBytes() == BLOCK_SIZE;
}
return new DataBlock(blockOffset, blockLength, data.retain());
} finally {
data.release();
}
});
});
}));
}
@ -170,8 +193,12 @@ public class DiskCache implements URLsDiskHandler, URLsWriter {
@Override
public Mono<DiskMetadata> requestDiskMetadata(URL url) {
return fileMetadata
.get(null, url.getSerializer(db.getAllocator()).serialize(url))
return Mono
.using(
() -> url.getSerializer(db.getAllocator()).serialize(url),
key -> fileMetadata.get(null, key.retain()),
ReferenceCounted::release
)
.map(diskMetadataSerializer::deserialize);
}
@ -183,8 +210,12 @@ public class DiskCache implements URLsDiskHandler, URLsWriter {
@Override
public Mono<Tuple2<Metadata, Flux<DataBlock>>> request(URL url) {
return fileMetadata
.get(null, url.getSerializer(db.getAllocator()).serialize(url))
return Mono
.using(
() -> url.getSerializer(db.getAllocator()).serialize(url),
key -> fileMetadata.get(null, key.retain()),
ReferenceCounted::release
)
.map(diskMetadataSerializer::deserialize)
.map(diskMeta -> {
var meta = diskMeta.asMetadata();