io.questdb.cutlass.pgwire.PGJobContext Maven / Gradle / Ivy

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 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2022 QuestDB
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 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
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 *  http://www.apache.org/licenses/LICENSE-2.0
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 *  distributed under the License is distributed on an "AS IS" BASIS,
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package io.questdb.cutlass.pgwire;

import io.questdb.Metrics;
import io.questdb.cairo.CairoEngine;
import io.questdb.griffin.DatabaseSnapshotAgent;
import io.questdb.griffin.FunctionFactoryCache;
import io.questdb.griffin.SqlCompiler;
import io.questdb.network.PeerDisconnectedException;
import io.questdb.network.PeerIsSlowToReadException;
import io.questdb.network.PeerIsSlowToWriteException;
import io.questdb.std.AssociativeCache;
import io.questdb.std.Misc;
import io.questdb.std.WeakSelfReturningObjectPool;

import java.io.Closeable;

public class PGJobContext implements Closeable {

    private final SqlCompiler compiler;
    private final AssociativeCache typesAndSelectCache;
    private final WeakSelfReturningObjectPool typesAndSelectPool;
    private final AssociativeCache typesAndUpdateCache;
    private final WeakSelfReturningObjectPool typesAndUpdatePool;

    public PGJobContext(
            PGWireConfiguration configuration,
            CairoEngine engine,
            FunctionFactoryCache functionFactoryCache,
            DatabaseSnapshotAgent snapshotAgent
    ) {
        this.compiler = new SqlCompiler(engine, functionFactoryCache, snapshotAgent);

        final Metrics metrics = engine.getMetrics();

        final boolean enableSelectCache = configuration.isSelectCacheEnabled();
        final int blockCount = enableSelectCache ? configuration.getSelectCacheBlockCount() : 1;
        final int rowCount = enableSelectCache ? configuration.getSelectCacheRowCount() : 1;
        typesAndSelectCache = new AssociativeCache<>(blockCount, rowCount, metrics.pgWire().cachedSelectsGauge());
        typesAndSelectPool = new WeakSelfReturningObjectPool<>(TypesAndSelect::new, blockCount * rowCount);

        final boolean enabledUpdateCache = configuration.isUpdateCacheEnabled();
        final int updateBlockCount = enabledUpdateCache ? configuration.getUpdateCacheBlockCount() : 1; // 8
        final int updateRowCount = enabledUpdateCache ? configuration.getUpdateCacheRowCount() : 1; // 8
        typesAndUpdateCache = new AssociativeCache<>(updateBlockCount, updateRowCount, metrics.pgWire().cachedUpdatesGauge());
        typesAndUpdatePool = new WeakSelfReturningObjectPool<>(parent -> new TypesAndUpdate(parent, engine), updateBlockCount * updateRowCount);
    }

    @Override
    public void close() {
        Misc.free(compiler);
        Misc.free(typesAndSelectCache);
        Misc.free(typesAndUpdateCache);
    }

    public void handleClientOperation(PGConnectionContext context, int operation)
            throws PeerIsSlowToWriteException,
            PeerIsSlowToReadException,
            PeerDisconnectedException,
            BadProtocolException {
        context.handleClientOperation(
                compiler,
                typesAndSelectCache,
                typesAndSelectPool,
                typesAndUpdateCache,
                typesAndUpdatePool,
                operation
        );
    }

    public void flushQueryCache() {
        typesAndSelectCache.clear();
        typesAndUpdateCache.clear();
    }
}