io.questdb.cutlass.http.processors.TextQueryProcessorState Maven / Gradle / Ivy

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 *
 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2020 QuestDB
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
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package io.questdb.cutlass.http.processors;

import io.questdb.cairo.sql.Record;
import io.questdb.cairo.sql.RecordCursor;
import io.questdb.cairo.sql.RecordCursorFactory;
import io.questdb.cairo.sql.RecordMetadata;
import io.questdb.cutlass.http.HttpConnectionContext;
import io.questdb.std.Misc;
import io.questdb.std.Mutable;
import io.questdb.std.Rnd;
import io.questdb.std.str.StringSink;

import java.io.Closeable;

public class TextQueryProcessorState implements Mutable, Closeable {
    final StringSink query = new StringSink();
    private final HttpConnectionContext httpConnectionContext;
    boolean countRows = false;
    boolean noMeta = false;
    RecordCursorFactory recordCursorFactory;
    RecordMetadata metadata;
    RecordCursor cursor;
    long count;
    long skip;
    long stop;
    Record record;
    Rnd rnd;
    int queryState = JsonQueryProcessorState.QUERY_PREFIX;
    int columnIndex;
    private boolean queryCacheable = false;
    String fileName;

    public TextQueryProcessorState(HttpConnectionContext httpConnectionContext) {
        this.httpConnectionContext = httpConnectionContext;
    }

    @Override
    public void clear() {
        metadata = null;
        cursor = Misc.free(cursor);
        record = null;
        if (null != recordCursorFactory) {
            if (queryCacheable) {
                QueryCache.getInstance().push(query, recordCursorFactory);
            } else {
                recordCursorFactory.close();
            }
            recordCursorFactory = null;
        }
        queryCacheable = false;
        query.clear();
        queryState = JsonQueryProcessorState.QUERY_PREFIX;
        columnIndex = 0;
        countRows = false;
    }

    @Override
    public void close() {
        cursor = Misc.free(cursor);
        recordCursorFactory = Misc.free(recordCursorFactory);
    }

    public long getFd() {
        return httpConnectionContext.getFd();
    }

    void setQueryCacheable(boolean queryCacheable) {
        this.queryCacheable = queryCacheable;
    }
}