com.mapd.parser.server.CalciteParserFactory.java Source code

Introduction

Here is the source code for com.mapd.parser.server.CalciteParserFactory.java

Source

/*
 * Copyright 2017 MapD Technologies, Inc.
 *
 * 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.
 */

package com.mapd.parser.server;

import java.util.Map;

import com.mapd.calcite.parser.MapDParser;
import org.apache.commons.pool.PoolableObjectFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author michael
 */
class CalciteParserFactory implements PoolableObjectFactory {
    final static Logger MAPDLOGGER = LoggerFactory.getLogger(CalciteParserFactory.class);

    private final String dataDir;
    private final Map<String, ExtensionFunction> extSigs;

    public CalciteParserFactory(String dataDir, final Map<String, ExtensionFunction> extSigs) {
        this.dataDir = dataDir;
        this.extSigs = extSigs;
    }

    @Override
    public Object makeObject() throws Exception {
        MapDParser obj = new MapDParser(dataDir, extSigs);
        return obj;
    }

    @Override
    public void destroyObject(Object obj) throws Exception {
        //no need to do anything
    }

    @Override
    public boolean validateObject(Object obj) {
        MapDParser mdp = (MapDParser) obj;
        if (mdp.getCallCount() < 1000) {
            return true;
        } else {
            MAPDLOGGER.debug(" invalidating object due to max use count");
            return false;
        }
    }

    @Override
    public void activateObject(Object obj) throws Exception {
        // don't need to do anything
    }

    @Override
    public void passivateObject(Object obj) throws Exception {
        // nothing to currently do here
    }

}