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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.frameworkset.commons.dbcp;

import com.frameworkset.common.poolman.PoolManConstants;
import com.frameworkset.common.poolman.util.DBConf;
import com.frameworkset.common.poolman.util.JDBCPoolMetaData;
import com.frameworkset.commons.dbcp2.BasicDataSource;
import com.frameworkset.commons.dbcp2.NativeDataSource;
import com.frameworkset.orm.adapter.DB;
import com.frameworkset.util.SimpleStringUtil;
import org.frameworkset.persitent.datasource.BalanceDatasource;
import org.frameworkset.persitent.datasource.RandomBalanceDatasource;
import org.frameworkset.persitent.datasource.RoundbinBalanceDatasource;

import javax.sql.DataSource;
import java.io.ByteArrayInputStream;
import java.sql.Connection;
import java.util.*;

/**
 * JNDI object factory that creates an instance of
 * BasicDataSource that has been configured based on the
 * RefAddr values of the specified Reference,
 * which must match the names and data types of the
 * BasicDataSource bean properties.
 *
 * @author Craig R. McClanahan
 * @author Dirk Verbeeck
 * @version $Revision: 828639 $ $Date: 2009-10-22 06:27:43 -0400 (Thu, 22 Oct 2009) $
 */
public class BasicDataSourceFactory  {

    private final static String PROP_DEFAULTAUTOCOMMIT = "defaultAutoCommit";
    private final static String PROP_DEFAULTREADONLY = "defaultReadOnly";
    private final static String PROP_DEFAULTTRANSACTIONISOLATION = "defaultTransactionIsolation";
    private final static String PROP_DEFAULTCATALOG = "defaultCatalog";
    private final static String PROP_DRIVERCLASSNAME = "driverClassName";
    private final static String PROP_MAXACTIVE = "maxActive";
    private final static String PROP_MAXIDLE = "maxIdle";
    private final static String PROP_MINIDLE = "minIdle";
    private final static String PROP_INITIALSIZE = "initialSize";
    private final static String PROP_MAXWAIT = "maxWait";
    private final static String PROP_TESTONBORROW = "testOnBorrow";
    private final static String PROP_TESTONRETURN = "testOnReturn";
    private final static String PROP_TIMEBETWEENEVICTIONRUNSMILLIS = "timeBetweenEvictionRunsMillis";
    private final static String PROP_NUMTESTSPEREVICTIONRUN = "numTestsPerEvictionRun";
    private final static String PROP_MINEVICTABLEIDLETIMEMILLIS = "minEvictableIdleTimeMillis";
    private final static String PROP_TESTWHILEIDLE = "testWhileIdle";
	private final static String PROP_validateDatasourceWhenCreate = "validateDatasourceWhenCreate";

    private final static String PROP_PASSWORD = "password";
    private final static String PROP_URL = "url";
    private final static String PROP_USERNAME = "username";
    private final static String PROP_VALIDATIONQUERY = "validationQuery";
    private final static String PROP_VALIDATIONQUERY_TIMEOUT = "validationQueryTimeout";
    /**
     * The property name for initConnectionSqls.
     * The associated value String must be of the form [query;]*
     * @since 1.3
     */
    private final static String PROP_INITCONNECTIONSQLS = "initConnectionSqls";
    private final static String PROP_ACCESSTOUNDERLYINGCONNECTIONALLOWED = "accessToUnderlyingConnectionAllowed";
    private final static String PROP_REMOVEABANDONED = "removeAbandoned";
    private final static String PROP_REMOVEABANDONEDTIMEOUT = "removeAbandonedTimeout";
    private final static String PROP_LOGABANDONED = "logAbandoned";
    private final static String PROP_POOLPREPAREDSTATEMENTS = "poolPreparedStatements";
    private final static String PROP_MAXOPENPREPAREDSTATEMENTS = "maxOpenPreparedStatements";
    private final static String PROP_CONNECTIONPROPERTIES = "connectionProperties";

    private final static String[] ALL_PROPERTIES = {
        PROP_DEFAULTAUTOCOMMIT,
        PROP_DEFAULTREADONLY,
        PROP_DEFAULTTRANSACTIONISOLATION,
        PROP_DEFAULTCATALOG,
        PROP_DRIVERCLASSNAME,
        PROP_MAXACTIVE,
        PROP_MAXIDLE,
        PROP_MINIDLE,
        PROP_INITIALSIZE,
        PROP_MAXWAIT,
        PROP_TESTONBORROW,
        PROP_TESTONRETURN,
        PROP_TIMEBETWEENEVICTIONRUNSMILLIS,
        PROP_NUMTESTSPEREVICTIONRUN,
        PROP_MINEVICTABLEIDLETIMEMILLIS,
        PROP_TESTWHILEIDLE,
        PROP_PASSWORD,
        PROP_URL,
        PROP_USERNAME,
        PROP_VALIDATIONQUERY,
        PROP_VALIDATIONQUERY_TIMEOUT,
        PROP_INITCONNECTIONSQLS,
        PROP_ACCESSTOUNDERLYINGCONNECTIONALLOWED,
        PROP_REMOVEABANDONED,
        PROP_REMOVEABANDONEDTIMEOUT,
        PROP_LOGABANDONED,
        PROP_POOLPREPAREDSTATEMENTS,
        PROP_MAXOPENPREPAREDSTATEMENTS,
        PROP_CONNECTIONPROPERTIES
    };

    
    /**
     * Internal constant to indicate the level is not set.
     */
    static final int UNKNOWN_TRANSACTIONISOLATION = -1;
//    /**
//     * Creates and configures a {@link BasicDataSource} instance based on the
//     * given properties.
//     * 
//     * @param properties the datasource configuration properties
//     * @throws Exception if an error occurs creating the data source
//     */
//    public static DataSource createDBCP2DataSource(Properties properties) throws Exception {
//        String url =  properties.getProperty(PROP_URL);
//        return createDBCP2DataSource(url,properties);      
//    }

    /**
     * Creates and configures a {@link BasicDataSource} instance based on the
     * given properties.
     *
     * @param properties the datasource configuration properties
     * @throws Exception if an error occurs creating the data source
     */
    public static DataSource createDBCP2DataSource(Properties properties, DB db,JDBCPoolMetaData jdbcPoolMetaData) throws Exception {
        String url =  properties.getProperty(PROP_URL);
        
        if(!jdbcPoolMetaData.isEnableBalance()) {

            Map urlParams = db.getUrlParams(url);
            if(urlParams != null){
                String balance = (String)urlParams.get("b.balance");
                String enableBalance = (String)urlParams.get("b.enableBalance");
                if(enableBalance != null && enableBalance.equals("true")){
                    if(SimpleStringUtil.isEmpty(balance) || balance.equals(DBConf.BALANCE_RANDOM)){
                        BalanceDatasource balanceDatasource = new RandomBalanceDatasource(url,db,properties);
                        balanceDatasource.init();
                        return balanceDatasource;
                    }
                    else{
                        BalanceDatasource balanceDatasource =  new RoundbinBalanceDatasource(url,db,properties);
                        balanceDatasource.init();
                        return balanceDatasource;
                    }
                }
                else {
                    return createDBCP2DataSource(url, properties);
                }
            }
            else {
                return createDBCP2DataSource(url, properties);
            }
        }
        else{
            String balance = jdbcPoolMetaData.getBalance();
            if(SimpleStringUtil.isEmpty(balance) || balance.equals(DBConf.BALANCE_RANDOM)){
                BalanceDatasource balanceDatasource = new RandomBalanceDatasource(url,db,properties);
                balanceDatasource.init();
                return balanceDatasource;
            }
            else{
                BalanceDatasource balanceDatasource =  new RoundbinBalanceDatasource(url,db,properties);
                balanceDatasource.init();
                return balanceDatasource;
            }
        }
    }

    public static DataSource createDBCP2DataSource(String url,Properties properties) throws Exception {
        com.frameworkset.commons.dbcp2.BasicDataSource dataSource = new com.frameworkset.commons.dbcp2.BasicDataSource();
        String value = null;
        boolean usepool = Boolean.parseBoolean((String)properties.get(PoolManConstants.PROP_USEPOOL));
        if(usepool)
        {
            value = properties.getProperty(PROP_DEFAULTAUTOCOMMIT);
            if (value != null) {
                dataSource.setDefaultAutoCommit(Boolean.valueOf(value).booleanValue());
            }

            value = properties.getProperty(PROP_DEFAULTREADONLY);
            if (value != null &&   !"".equalsIgnoreCase(value)) {
                dataSource.setDefaultReadOnly(Boolean.valueOf(value).booleanValue());
            }

            value = properties.getProperty(PROP_DEFAULTTRANSACTIONISOLATION);
            if (value != null && !value.equals("")) {
                int level = UNKNOWN_TRANSACTIONISOLATION;
                if ("NONE".equalsIgnoreCase(value) || "".equalsIgnoreCase(value)) {
                    level = Connection.TRANSACTION_NONE;
                }
                else if ("READ_COMMITTED".equalsIgnoreCase(value)) {
                    level = Connection.TRANSACTION_READ_COMMITTED;
                }
                else if ("READ_UNCOMMITTED".equalsIgnoreCase(value)) {
                    level = Connection.TRANSACTION_READ_UNCOMMITTED;
                }
                else if ("REPEATABLE_READ".equalsIgnoreCase(value)) {
                    level = Connection.TRANSACTION_REPEATABLE_READ;
                }
                else if ("SERIALIZABLE".equalsIgnoreCase(value)) {
                    level = Connection.TRANSACTION_SERIALIZABLE;
                }
                else {
                    try {
                        level = Integer.parseInt(value);
                    } catch (NumberFormatException e) {
                        System.err.println("Could not parse defaultTransactionIsolation: " + value);
                        System.err.println("WARNING: defaultTransactionIsolation not set");
                        System.err.println("using default value of database driver");
                        level = UNKNOWN_TRANSACTIONISOLATION;
                    }
                }
                dataSource.setDefaultTransactionIsolation(level);
            }

            value = properties.getProperty(PROP_DEFAULTCATALOG);
            if (value != null) {
                dataSource.setDefaultCatalog(value);
            }

            value = properties.getProperty(PROP_DRIVERCLASSNAME);
            if (value != null) {
                dataSource.setDriverClassName(value);
            }

            value = properties.getProperty(PROP_MAXACTIVE);
            if (value != null) {
                dataSource.setMaxTotal(Integer.parseInt(value));
            }

            value = properties.getProperty(PROP_MAXIDLE);
            if (value != null) {
                dataSource.setMaxIdle(Integer.parseInt(value));
            }

            value = properties.getProperty(PROP_MINIDLE);
            if (value != null) {
                dataSource.setMinIdle(Integer.parseInt(value));
            }

            value = properties.getProperty(PROP_INITIALSIZE);
            if (value != null) {
                dataSource.setInitialSize(Integer.parseInt(value));
            }

            value = properties.getProperty(PROP_MAXWAIT);
            if (value != null) {
                dataSource.setMaxWaitMillis(Long.parseLong(value));
            }

            value = properties.getProperty(PROP_TESTONBORROW);
            if (value != null) {
                dataSource.setTestOnBorrow(Boolean.valueOf(value).booleanValue());
            }

            value = properties.getProperty(PROP_TESTONRETURN);
            if (value != null) {
                dataSource.setTestOnReturn(Boolean.valueOf(value).booleanValue());
            }

            value = properties.getProperty(PROP_TIMEBETWEENEVICTIONRUNSMILLIS);
            if (value != null) {
                dataSource.setTimeBetweenEvictionRunsMillis(Long.parseLong(value));
            }

            value = properties.getProperty(PROP_NUMTESTSPEREVICTIONRUN);
            if (value != null) {
                dataSource.setNumTestsPerEvictionRun(Integer.parseInt(value));
            }

            value = properties.getProperty(PROP_MINEVICTABLEIDLETIMEMILLIS);
            if (value != null) {
                dataSource.setMinEvictableIdleTimeMillis(Long.parseLong(value));
            }

            value = properties.getProperty(PROP_TESTWHILEIDLE);
            if (value != null) {
                dataSource.setTestWhileIdle(Boolean.valueOf(value).booleanValue());
            }
            value = properties.getProperty(PROP_validateDatasourceWhenCreate);
            if (value != null) {
                dataSource.setValidateDatasourceWhenCreate(Boolean.valueOf(value).booleanValue());
            }


            value = properties.getProperty(PROP_PASSWORD);
            if (value != null) {
                dataSource.setPassword(value);
            }

//            value = properties.getProperty(PROP_URL);
            if (value != null) {
                dataSource.setUrl(url);
            }

            value = properties.getProperty(PROP_USERNAME);
            if (value != null) {
                dataSource.setUsername(value);
            }

            value = properties.getProperty(PROP_VALIDATIONQUERY);
            if (value != null) {
                dataSource.setValidationQuery(value);
            }

            value = properties.getProperty(PROP_VALIDATIONQUERY_TIMEOUT);
            if (value != null) {
                dataSource.setValidationQueryTimeout(Integer.parseInt(value));
            }

            value = properties.getProperty(PROP_ACCESSTOUNDERLYINGCONNECTIONALLOWED);
            if (value != null) {
                dataSource.setAccessToUnderlyingConnectionAllowed(Boolean.valueOf(value).booleanValue());
            }

            value = properties.getProperty(PROP_REMOVEABANDONED);
            if (value != null) {
                dataSource.setRemoveAbandonedOnBorrow(Boolean.valueOf(value).booleanValue());
            }

            value = properties.getProperty(PROP_REMOVEABANDONEDTIMEOUT);
            if (value != null) {
                dataSource.setRemoveAbandonedTimeout(Integer.parseInt(value));
            }

            value = properties.getProperty(PROP_LOGABANDONED);
            if (value != null) {
                dataSource.setLogAbandoned(Boolean.valueOf(value).booleanValue());
            }

            value = properties.getProperty(PROP_POOLPREPAREDSTATEMENTS);
            if (value != null) {
                dataSource.setPoolPreparedStatements(Boolean.valueOf(value).booleanValue());
            }

            value = properties.getProperty(PROP_MAXOPENPREPAREDSTATEMENTS);
            if (value != null) {
                dataSource.setMaxOpenPreparedStatements(Integer.parseInt(value));
            }

            value = properties.getProperty(PROP_INITCONNECTIONSQLS);
            if (value != null) {
                StringTokenizer tokenizer = new StringTokenizer(value, ";");

                List sqls = new ArrayList();
                while(tokenizer.hasMoreTokens())
                {
                    sqls.add(tokenizer.nextToken());
                }

                dataSource.setConnectionInitSqls(sqls);
            }

            Object connectProperties = properties.get(PROP_CONNECTIONPROPERTIES);
            if (connectProperties != null) {
                Properties p = null;
                if(connectProperties instanceof String){
                    p = getProperties((String)connectProperties);
                }
                else
                {
                    p = (Properties) connectProperties;
                }

                Enumeration e = p.propertyNames();
                while (e.hasMoreElements()) {
                    String propertyName = (String) e.nextElement();
                    dataSource.addConnectionProperty(propertyName, String.valueOf(p.get(propertyName)));
                }
            }

            // DBCP-215
            // Trick to make sure that initialSize connections are created
            if (dataSource.getInitialSize() > 0) {
                dataSource.getLogWriter();
            }
            // Return the configured DataSource instance
            return dataSource;
        }
        else
        {
            NativeDataSource nativedataSource = new NativeDataSource();
            value = properties.getProperty(PROP_DEFAULTAUTOCOMMIT);
            if (value != null) {
                nativedataSource.setDefaultAutoCommit(Boolean.valueOf(value).booleanValue());
            }

            value = properties.getProperty(PROP_DEFAULTREADONLY);
            if (value != null &&  !"".equalsIgnoreCase(value)) {
                nativedataSource.setDefaultReadOnly(Boolean.valueOf(value).booleanValue());
            }

            value = properties.getProperty(PROP_DEFAULTTRANSACTIONISOLATION);
            if (value != null&& !value.equals("")) {
                int level = UNKNOWN_TRANSACTIONISOLATION;
                if ("NONE".equalsIgnoreCase(value)  || "".equalsIgnoreCase(value)) {
                    level = Connection.TRANSACTION_NONE;
                }
                else if ("READ_COMMITTED".equalsIgnoreCase(value)) {
                    level = Connection.TRANSACTION_READ_COMMITTED;
                }
                else if ("READ_UNCOMMITTED".equalsIgnoreCase(value)) {
                    level = Connection.TRANSACTION_READ_UNCOMMITTED;
                }
                else if ("REPEATABLE_READ".equalsIgnoreCase(value)) {
                    level = Connection.TRANSACTION_REPEATABLE_READ;
                }
                else if ("SERIALIZABLE".equalsIgnoreCase(value)) {
                    level = Connection.TRANSACTION_SERIALIZABLE;
                }
                else {
                    try {
                        level = Integer.parseInt(value);
                    } catch (NumberFormatException e) {
                        System.err.println("Could not parse defaultTransactionIsolation: " + value);
                        System.err.println("WARNING: defaultTransactionIsolation not set");
                        System.err.println("using default value of database driver");
                        level = UNKNOWN_TRANSACTIONISOLATION;
                    }
                }
                nativedataSource.setDefaultTransactionIsolation(level);
            }

            value = properties.getProperty(PROP_DEFAULTCATALOG);
            if (value != null) {
                nativedataSource.setDefaultCatalog(value);
            }

            value = properties.getProperty(PROP_DRIVERCLASSNAME);
            if (value != null) {
                nativedataSource.setDriver(value);
            }





            value = properties.getProperty(PROP_PASSWORD);
            if (value != null) {
                nativedataSource.setPassword(value);
            }

//            value = properties.getProperty(PROP_URL);
            if (value != null) {
                nativedataSource.setUrl(url);
            }

            value = properties.getProperty(PROP_USERNAME);
            if (value != null) {
                nativedataSource.setUser(value);
            }

// 	        value = properties.getProperty(PROP_VALIDATIONQUERY);
// 	        if (value != null) {
// 	            nativedataSource.setValidationQuery(value);
// 	        }
// 	
// 	        value = properties.getProperty(PROP_VALIDATIONQUERY_TIMEOUT);
// 	        if (value != null) {
// 	            nativedataSource.setValidationQueryTimeout(Integer.parseInt(value));
// 	        }

// 	        value = properties.getProperty(PROP_ACCESSTOUNDERLYINGCONNECTIONALLOWED);
// 	        if (value != null) {
// 	            nativedataSource.setAccessToUnderlyingConnectionAllowed(Boolean.valueOf(value).booleanValue());
// 	        }
// 	
// 	        value = properties.getProperty(PROP_REMOVEABANDONED);
// 	        if (value != null) {
// 	            nativedataSource.setRemoveAbandonedOnBorrow(Boolean.valueOf(value).booleanValue());
// 	        }
// 	
// 	        value = properties.getProperty(PROP_REMOVEABANDONEDTIMEOUT);
// 	        if (value != null) {     
// 	            nativedataSource.setRemoveAbandonedTimeout(Integer.parseInt(value));
// 	        }
// 	
            value = properties.getProperty(PROP_LOGABANDONED);
            if (value != null) {
                nativedataSource.setLogAbandoned(Boolean.valueOf(value).booleanValue());
            }

// 	        value = properties.getProperty(PROP_POOLPREPAREDSTATEMENTS);
// 	        if (value != null) {
// 	            nativedataSource.setPoolPreparedStatements(Boolean.valueOf(value).booleanValue());
// 	        }
// 	
// 	        value = properties.getProperty(PROP_MAXOPENPREPAREDSTATEMENTS);
// 	        if (value != null) {
// 	            nativedataSource.setMaxOpenPreparedStatements(Integer.parseInt(value));
// 	        }
            value = properties.getProperty(PROP_CONNECTIONPROPERTIES);
            if (value != null) {
                Properties p = getProperties(value);
                Enumeration e = p.propertyNames();
                while (e.hasMoreElements()) {
                    String propertyName = (String) e.nextElement();
                    nativedataSource.addConnectionProperty(propertyName, p.getProperty(propertyName));
                }
            }
            // Return the configured DataSource instance
            return nativedataSource;
        }


    }

    /**
     * Parse properties from the string. Format of the string must be [propertyName=property;]*
     * @param propText
     * @return Properties
     * @throws Exception
     */
    static private Properties getProperties(String propText) throws Exception {
      Properties p = new Properties();
      if (propText != null) {
        p.load(new ByteArrayInputStream(propText.replace(';', '\n').getBytes()));
      }
      return p;
    }
}