Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/utils/DBCPConnectionProvider.java @ 4704:115afdaf3e85

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Changed naming of variables (i & j -> i & k) for readability.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 19 Dec 2012 11:35:51 +0100
parents 0af4c8386ed0
children fb9dcc68b9c2
rev   line source
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1 /*
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2 * Copyright 2004 The Apache Software Foundation.
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3 *
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4 * Licensed under the Apache License, Version 2.0 (the "License");
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5 * you may not use this file except in compliance with the License.
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6 * You may obtain a copy of the License at
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7 *
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8 * http://www.apache.org/licenses/LICENSE-2.0
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9 *
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10 * Unless required by applicable law or agreed to in writing, software
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11 * distributed under the License is distributed on an "AS IS" BASIS,
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12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 * See the License for the specific language governing permissions and
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14 * limitations under the License.
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15 */
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16 package de.intevation.flys.utils;
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17
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18 import java.sql.Connection;
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19 import java.sql.SQLException;
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20
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21 import java.util.Iterator;
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22 import java.util.Properties;
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23 import java.util.Map;
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24
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25 import org.apache.commons.dbcp.BasicDataSource;
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26 import org.apache.commons.dbcp.BasicDataSourceFactory;
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27
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28 import org.apache.log4j.Logger;
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29
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30 import org.hibernate.HibernateException;
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31
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32 import org.hibernate.connection.ConnectionProviderFactory;
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33 import org.hibernate.connection.ConnectionProvider;
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34
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35 import org.hibernate.cfg.Environment;
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36
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37 /**
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38 * <p>A connection provider that uses an Apache commons DBCP connection pool.</p>
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39 *
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40 * <p>To use this connection provider set:<br>
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41 * <code>hibernate.connection.provider_class&nbsp;org.hibernate.connection.DBCPConnectionProvider</code></p>
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42 *
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43 * <pre>Supported Hibernate properties:
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44 * hibernate.connection.driver_class
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45 * hibernate.connection.url
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46 * hibernate.connection.username
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47 * hibernate.connection.password
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48 * hibernate.connection.isolation
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49 * hibernate.connection.autocommit
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50 * hibernate.connection.pool_size
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51 * hibernate.connection (JDBC driver properties)</pre>
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52 * <br>
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53 * All DBCP properties are also supported by using the hibernate.dbcp prefix.
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54 * A complete list can be found on the DBCP configuration page:
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55 * <a href="http://jakarta.apache.org/commons/dbcp/configuration.html">http://jakarta.apache.org/commons/dbcp/configuration.html</a>.
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56 * <br>
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57 * <pre>Example:
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58 * hibernate.connection.provider_class org.hibernate.connection.DBCPConnectionProvider
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59 * hibernate.connection.driver_class org.hsqldb.jdbcDriver
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60 * hibernate.connection.username sa
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61 * hibernate.connection.password
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62 * hibernate.connection.url jdbc:hsqldb:test
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63 * hibernate.connection.pool_size 20
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64 * hibernate.dbcp.initialSize 10
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65 * hibernate.dbcp.maxWait 3000
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66 * hibernate.dbcp.validationQuery select 1 from dual</pre>
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67 *
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68 * <p>More information about configuring/using DBCP can be found on the
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69 * <a href="http://jakarta.apache.org/commons/dbcp/">DBCP website</a>.
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70 * There you will also find the DBCP wiki, mailing lists, issue tracking
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71 * and other support facilities</p>
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72 *
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73 * @see org.hibernate.connection.ConnectionProvider
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74 * @author Dirk Verbeeck
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75 */
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76 public class DBCPConnectionProvider
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77 implements ConnectionProvider
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78 {
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79 private static Logger log = Logger.getLogger(DBCPConnectionProvider.class);
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80
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81 private static final String PREFIX = "hibernate.dbcp.";
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82
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83 private BasicDataSource ds;
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84
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85 // Old Environment property for backward-compatibility
168
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86 // (property removed in Hibernate3)
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87 private static final String DBCP_PS_MAXACTIVE =
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88 "hibernate.dbcp.ps.maxActive";
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89
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90 // Property doesn't exists in Hibernate2
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91 private static final String AUTOCOMMIT =
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92 "hibernate.connection.autocommit";
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93
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94 public void configure(Properties props) throws HibernateException {
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95 try {
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96 log.debug("Configure DBCPConnectionProvider");
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97
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98 // DBCP properties used to create the BasicDataSource
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99 Properties dbcpProperties = new Properties();
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100
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101 // DriverClass & url
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102 String jdbcDriverClass = props.getProperty(Environment.DRIVER);
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103 String jdbcUrl = props.getProperty(Environment.URL);
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104 dbcpProperties.put("driverClassName", jdbcDriverClass);
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105 dbcpProperties.put("url", jdbcUrl);
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106
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107 // Username / password
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108 String username = props.getProperty(Environment.USER);
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109 String password = props.getProperty(Environment.PASS);
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110 dbcpProperties.put("username", username);
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111 dbcpProperties.put("password", password);
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112
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113 // Isolation level
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114 String isolationLevel = props.getProperty(Environment.ISOLATION);
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115 if (isolationLevel != null
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116 && (isolationLevel = isolationLevel.trim()).length() > 0) {
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117 dbcpProperties.put("defaultTransactionIsolation", isolationLevel);
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118 }
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119
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120 // Turn off autocommit (unless autocommit property is set)
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121 String autocommit = props.getProperty(AUTOCOMMIT);
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122 if (autocommit != null
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123 && (autocommit = autocommit.trim()).length() > 0) {
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124 dbcpProperties.put("defaultAutoCommit", autocommit);
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125 } else {
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126 dbcpProperties.put("defaultAutoCommit", String.valueOf(Boolean.FALSE));
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127 }
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128
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129 // Pool size
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130 String poolSize = props.getProperty(Environment.POOL_SIZE);
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131 if (poolSize != null
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132 && (poolSize = poolSize.trim()).length() > 0
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133 && Integer.parseInt(poolSize) > 0) {
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134 dbcpProperties.put("maxActive", poolSize);
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135 }
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136
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137 // Copy all "driver" properties into "connectionProperties"
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138 Properties driverProps =
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139 ConnectionProviderFactory.getConnectionProperties(props);
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140
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141 if (driverProps.size() > 0) {
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142 StringBuilder connectionProperties = new StringBuilder();
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143 for (Iterator iter = driverProps.entrySet().iterator();
168
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144 iter.hasNext();
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145 ) {
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146 Map.Entry entry = (Map.Entry)iter.next();
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147 String key = (String)entry.getKey();
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148 String value = (String)entry.getValue();
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149 connectionProperties
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150 .append(key)
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151 .append('=')
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152 .append(value);
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153 if (iter.hasNext()) {
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154 connectionProperties.append(';');
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155 }
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156 }
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157 dbcpProperties.put(
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158 "connectionProperties", connectionProperties.toString());
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159 }
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160
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161 // Copy all DBCP properties removing the prefix
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162 for (Iterator iter = props.entrySet().iterator() ; iter.hasNext() ;) {
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163 Map.Entry entry = (Map.Entry)iter.next();
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164 String key = (String)entry.getKey();
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165 if (key.startsWith(PREFIX)) {
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166 String property = key.substring(PREFIX.length());
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167 String value = (String)entry.getValue();
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168 dbcpProperties.put(property, value);
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169 }
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170 }
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171
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172 // Backward-compatibility
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173 if (props.getProperty(DBCP_PS_MAXACTIVE) != null) {
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174 dbcpProperties.put(
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175 "poolPreparedStatements",
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176 String.valueOf(Boolean.TRUE));
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177 dbcpProperties.put(
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178 "maxOpenPreparedStatements",
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179 props.getProperty(DBCP_PS_MAXACTIVE));
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180 }
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181
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182 // Some debug info
181
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183 /* // commented out, because it leaks the password
168
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184 if (log.isDebugEnabled()) {
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185 log.debug("Creating a DBCP BasicDataSource" +
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186 " with the following DBCP factory properties:");
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187 StringWriter sw = new StringWriter();
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188 dbcpProperties.list(new PrintWriter(sw, true));
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189 log.debug(sw.toString());
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190 }
181
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191 */
168
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192
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193 // Let the factory create the pool
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194 ds = (BasicDataSource)BasicDataSourceFactory
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195 .createDataSource(dbcpProperties);
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196
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197 // The BasicDataSource has lazy initialization
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198 // borrowing a connection will start the DataSource
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199 // and make sure it is configured correctly.
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200
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201 // Connection conn = ds.getConnection();
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202 // conn.close();
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203 }
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204 catch (Exception e) {
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205 String message = "Could not create a DBCP pool";
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206 log.fatal(message, e);
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207 if (ds != null) {
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208 BasicDataSource x = ds; ds = null;
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209 try {
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210 x.close();
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211 }
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212 catch (SQLException sqle) {
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213 }
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214 }
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215 throw new HibernateException(message, e);
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216 }
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217 log.debug("Configure DBCPConnectionProvider complete");
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218 }
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219
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220 public Connection getConnection() throws SQLException {
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221 return ds.getConnection();
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222 }
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223
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224 public void closeConnection(Connection conn) throws SQLException {
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225 conn.close();
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226 }
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227
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228 public void close() throws HibernateException {
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229 try {
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230 if (ds != null) {
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231 BasicDataSource x = ds; ds = null;
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232 x.close();
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233 }
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234 }
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235 catch (SQLException sqle) {
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236 throw new HibernateException("Could not close DBCP pool", sqle);
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237 }
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238 }
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239
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240 public boolean supportsAggressiveRelease() {
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241 return false;
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242 }
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243 }
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244 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org