CavalliumDBEngine/src/main/java/it/cavallium/dbengine/database/disk/LLIndexSearchers.java
2021-10-17 17:15:57 +02:00

245 lines
6.8 KiB
Java

package it.cavallium.dbengine.database.disk;
import io.net5.buffer.api.Drop;
import io.net5.buffer.api.Owned;
import io.net5.buffer.api.Resource;
import io.net5.buffer.api.Send;
import io.net5.buffer.api.internal.ResourceSupport;
import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.MultiReader;
import org.apache.lucene.search.IndexSearcher;
import org.warp.commonutils.log.Logger;
import org.warp.commonutils.log.LoggerFactory;
public interface LLIndexSearchers extends Resource<LLIndexSearchers> {
static LLIndexSearchers of(List<Send<LLIndexSearcher>> indexSearchers) {
return new ShardedIndexSearchers(indexSearchers, null);
}
static UnshardedIndexSearchers unsharded(Send<LLIndexSearcher> indexSearcher) {
return new UnshardedIndexSearchers(indexSearcher, null);
}
List<IndexSearcher> shards();
IndexSearcher shard(int shardIndex);
IndexReader allShards();
class UnshardedIndexSearchers extends ResourceSupport<LLIndexSearchers, UnshardedIndexSearchers>
implements LLIndexSearchers {
private static final Logger logger = LoggerFactory.getLogger(UnshardedIndexSearchers.class);
private static final Drop<UnshardedIndexSearchers> DROP = new Drop<>() {
@Override
public void drop(UnshardedIndexSearchers obj) {
try {
if (obj.indexSearcher != null) {
obj.indexSearcher.close();
}
} catch (Throwable ex) {
logger.error("Failed to close indexSearcher", ex);
}
try {
if (obj.onClose != null) {
obj.onClose.run();
}
} catch (Throwable ex) {
logger.error("Failed to close onClose", ex);
}
}
@Override
public Drop<UnshardedIndexSearchers> fork() {
return this;
}
@Override
public void attach(UnshardedIndexSearchers obj) {
}
};
private LLIndexSearcher indexSearcher;
private Runnable onClose;
public UnshardedIndexSearchers(Send<LLIndexSearcher> indexSearcher, Runnable onClose) {
super(DROP);
this.indexSearcher = indexSearcher.receive();
this.onClose = onClose;
}
@Override
public List<IndexSearcher> shards() {
return List.of(indexSearcher.getIndexSearcher());
}
@Override
public IndexSearcher shard(int shardIndex) {
if (!isOwned()) {
throw attachTrace(new IllegalStateException("UnshardedIndexSearchers must be owned to be used"));
}
if (shardIndex != -1) {
throw new IndexOutOfBoundsException("Shard index " + shardIndex + " is invalid, this is a unsharded index");
}
return indexSearcher.getIndexSearcher();
}
@Override
public IndexReader allShards() {
return indexSearcher.getIndexReader();
}
public IndexSearcher shard() {
return this.shard(-1);
}
@Override
protected RuntimeException createResourceClosedException() {
return new IllegalStateException("Closed");
}
@Override
protected Owned<UnshardedIndexSearchers> prepareSend() {
Send<LLIndexSearcher> indexSearcher = this.indexSearcher.send();
var onClose = this.onClose;
return drop -> {
var instance = new UnshardedIndexSearchers(indexSearcher, onClose);
drop.attach(instance);
return instance;
};
}
protected void makeInaccessible() {
this.indexSearcher = null;
this.onClose = null;
}
}
class ShardedIndexSearchers extends ResourceSupport<LLIndexSearchers, ShardedIndexSearchers>
implements LLIndexSearchers {
private static final Logger logger = LoggerFactory.getLogger(ShardedIndexSearchers.class);
private static final Drop<ShardedIndexSearchers> DROP = new Drop<>() {
@Override
public void drop(ShardedIndexSearchers obj) {
try {
for (LLIndexSearcher indexSearcher : obj.indexSearchers) {
indexSearcher.close();
}
} catch (Throwable ex) {
logger.error("Failed to close indexSearcher", ex);
}
try {
if (obj.onClose != null) {
obj.onClose.run();
}
} catch (Throwable ex) {
logger.error("Failed to close onClose", ex);
}
}
@Override
public Drop<ShardedIndexSearchers> fork() {
return this;
}
@Override
public void attach(ShardedIndexSearchers obj) {
}
};
private List<LLIndexSearcher> indexSearchers;
private List<IndexSearcher> indexSearchersVals;
private Runnable onClose;
public ShardedIndexSearchers(List<Send<LLIndexSearcher>> indexSearchers, Runnable onClose) {
super(DROP);
this.indexSearchers = new ArrayList<>(indexSearchers.size());
this.indexSearchersVals = new ArrayList<>(indexSearchers.size());
for (Send<LLIndexSearcher> llIndexSearcher : indexSearchers) {
var indexSearcher = llIndexSearcher.receive();
this.indexSearchers.add(indexSearcher);
this.indexSearchersVals.add(indexSearcher.getIndexSearcher());
}
this.onClose = onClose;
}
@Override
public List<IndexSearcher> shards() {
if (!isOwned()) {
throw attachTrace(new IllegalStateException("ShardedIndexSearchers must be owned to be used"));
}
return Collections.unmodifiableList(indexSearchersVals);
}
@Override
public IndexSearcher shard(int shardIndex) {
if (!isOwned()) {
throw attachTrace(new IllegalStateException("ShardedIndexSearchers must be owned to be used"));
}
if (shardIndex < 0) {
throw new IndexOutOfBoundsException("Shard index " + shardIndex + " is invalid");
}
return indexSearchersVals.get(shardIndex);
}
@Override
public IndexReader allShards() {
if (!isOwned()) {
throw attachTrace(new IllegalStateException("ShardedIndexSearchers must be owned to be used"));
}
var irs = new IndexReader[indexSearchersVals.size()];
for (int i = 0, s = indexSearchersVals.size(); i < s; i++) {
irs[i] = indexSearchersVals.get(i).getIndexReader();
}
Object2IntOpenHashMap<IndexReader> indexes = new Object2IntOpenHashMap<>();
for (int i = 0; i < irs.length; i++) {
indexes.put(irs[i], i);
}
try {
return new MultiReader(irs, Comparator.comparingInt(indexes::getInt), false);
} catch (IOException ex) {
// This shouldn't happen
throw new UncheckedIOException(ex);
}
}
@Override
protected RuntimeException createResourceClosedException() {
return new IllegalStateException("Closed");
}
@Override
protected Owned<ShardedIndexSearchers> prepareSend() {
List<Send<LLIndexSearcher>> indexSearchers = new ArrayList<>(this.indexSearchers.size());
for (LLIndexSearcher indexSearcher : this.indexSearchers) {
indexSearchers.add(indexSearcher.send());
}
var onClose = this.onClose;
return drop -> {
var instance = new ShardedIndexSearchers(indexSearchers, onClose);
drop.attach(instance);
return instance;
};
}
protected void makeInaccessible() {
this.indexSearchers = null;
this.indexSearchersVals = null;
this.onClose = null;
}
}
}