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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
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 * GPL Classpath Exception:
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 */

// Portions Copyright [2016] [Payara Foundation and/or its affiliates]

package org.glassfish.api.jdbc.validation;

import com.sun.logging.LogDomains;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.glassfish.api.jdbc.ConnectionValidation;

/**
 * Default connection validation mechanism used by common database vendors to
 * perform connection validation.
 * 
 * @author Shalini M
 */
public class DefaultConnectionValidation implements ConnectionValidation {
    private static final String SQL = "SELECT '1'";

    /**
     * Check for validity of java.sql.Connection
     *
     * @param con       java.sql.Connectionto be validated
     * @param statementTimeout The time in seconds to wait for the query to complete
     * @return True if connection is valid
     */
    @Override
    public boolean isConnectionValid(Connection con, int statementTimeout) {
        boolean isValid = false;
        Statement stmt = null;
        try {
            stmt = con.createStatement();
            stmt.setQueryTimeout(statementTimeout);
            isValid = stmt.execute(SQL);
        } catch (SQLException sqle) {
            isValid = false;
            if(Logger.getLogger(LogDomains.RSR_LOGGER).isLoggable(Level.FINEST)) {
                Logger.getLogger(LogDomains.RSR_LOGGER).log(Level.FINEST,
                    "connection_validation_exception", sqle);
            }
        } finally {
            if (stmt != null) {
                try {
                    stmt.close();
                } catch (Exception ex) {
                }
            }
        }
        return isValid;
    }
}