Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/utils/DBCPConnectionProvider.java @ 5747:09465f534c86

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rename WMS-Layers representing gauges in data cage
author Tom Gottfried <tom@intevation.de>
date Wed, 17 Apr 2013 19:01:44 +0200
parents 42bb6ff78d1b
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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 import java.util.Collections;
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25 import java.util.StringTokenizer;
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26
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27 import org.apache.commons.dbcp.BasicDataSource;
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28 import org.apache.commons.dbcp.BasicDataSourceFactory;
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29
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30 import org.apache.log4j.Logger;
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31
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32 import org.hibernate.HibernateException;
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33
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34 import org.hibernate.connection.ConnectionProviderFactory;
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35 import org.hibernate.connection.ConnectionProvider;
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36
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37 import org.hibernate.cfg.Environment;
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38
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39 /**
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40 * <p>A connection provider that uses an Apache commons DBCP connection pool.</p>
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41 *
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42 * <p>To use this connection provider set:<br>
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43 * <code>hibernate.connection.provider_class&nbsp;org.hibernate.connection.DBCPConnectionProvider</code></p>
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44 *
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45 * <pre>Supported Hibernate properties:
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46 * hibernate.connection.driver_class
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47 * hibernate.connection.url
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48 * hibernate.connection.username
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49 * hibernate.connection.password
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50 * hibernate.connection.isolation
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51 * hibernate.connection.autocommit
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52 * hibernate.connection.pool_size
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53 * hibernate.connection (JDBC driver properties)</pre>
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54 * <br>
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55 * All DBCP properties are also supported by using the hibernate.dbcp prefix.
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56 * A complete list can be found on the DBCP configuration page:
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57 * <a href="http://jakarta.apache.org/commons/dbcp/configuration.html">http://jakarta.apache.org/commons/dbcp/configuration.html</a>.
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58 * <br>
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59 * <pre>Example:
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60 * hibernate.connection.provider_class org.hibernate.connection.DBCPConnectionProvider
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61 * hibernate.connection.driver_class org.hsqldb.jdbcDriver
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62 * hibernate.connection.username sa
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63 * hibernate.connection.password
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64 * hibernate.connection.url jdbc:hsqldb:test
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65 * hibernate.connection.pool_size 20
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66 * hibernate.dbcp.initialSize 10
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67 * hibernate.dbcp.maxWait 3000
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68 * hibernate.dbcp.validationQuery select 1 from dual</pre>
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69 *
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70 * <p>More information about configuring/using DBCP can be found on the
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71 * <a href="http://jakarta.apache.org/commons/dbcp/">DBCP website</a>.
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72 * There you will also find the DBCP wiki, mailing lists, issue tracking
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73 * and other support facilities</p>
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74 *
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75 * @see org.hibernate.connection.ConnectionProvider
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76 * @author Dirk Verbeeck
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77 */
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78 public class DBCPConnectionProvider
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79 implements ConnectionProvider
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80 {
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81 private static Logger log = Logger.getLogger(DBCPConnectionProvider.class);
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82
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83 private static final String PREFIX = "hibernate.dbcp.";
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84
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85 private BasicDataSource ds;
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86
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87 // Old Environment property for backward-compatibility
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88 // (property removed in Hibernate3)
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89 private static final String DBCP_PS_MAXACTIVE =
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90 "hibernate.dbcp.ps.maxActive";
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91
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92 // Property doesn't exists in Hibernate2
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93 private static final String AUTOCOMMIT =
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94 "hibernate.connection.autocommit";
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95
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96 public void configure(Properties props) throws HibernateException {
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97 try {
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98 log.debug("Configure DBCPConnectionProvider");
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99
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100 // DBCP properties used to create the BasicDataSource
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101 Properties dbcpProperties = new Properties();
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102
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103 // DriverClass & url
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104 String jdbcDriverClass = props.getProperty(Environment.DRIVER);
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105 String jdbcUrl = props.getProperty(Environment.URL);
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106 dbcpProperties.put("driverClassName", jdbcDriverClass);
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107 dbcpProperties.put("url", jdbcUrl);
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108
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109 // Username / password
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110 String username = props.getProperty(Environment.USER);
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111 String password = props.getProperty(Environment.PASS);
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112 dbcpProperties.put("username", username);
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113 dbcpProperties.put("password", password);
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114
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115 // Isolation level
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116 String isolationLevel = props.getProperty(Environment.ISOLATION);
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117 if (isolationLevel != null
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118 && (isolationLevel = isolationLevel.trim()).length() > 0) {
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119 dbcpProperties.put("defaultTransactionIsolation", isolationLevel);
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120 }
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121
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122 // Turn off autocommit (unless autocommit property is set)
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123 String autocommit = props.getProperty(AUTOCOMMIT);
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124 if (autocommit != null
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125 && (autocommit = autocommit.trim()).length() > 0) {
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126 dbcpProperties.put("defaultAutoCommit", autocommit);
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127 } else {
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128 dbcpProperties.put("defaultAutoCommit", String.valueOf(Boolean.FALSE));
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129 }
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130
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131 // Pool size
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132 String poolSize = props.getProperty(Environment.POOL_SIZE);
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133 if (poolSize != null
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134 && (poolSize = poolSize.trim()).length() > 0
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135 && Integer.parseInt(poolSize) > 0) {
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136 dbcpProperties.put("maxActive", poolSize);
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137 }
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138
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139 // Copy all "driver" properties into "connectionProperties"
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140 Properties driverProps =
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141 ConnectionProviderFactory.getConnectionProperties(props);
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142
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143 if (driverProps.size() > 0) {
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144 StringBuilder connectionProperties = new StringBuilder();
464
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145 for (Iterator iter = driverProps.entrySet().iterator();
168
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146 iter.hasNext();
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147 ) {
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148 Map.Entry entry = (Map.Entry)iter.next();
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149 String key = (String)entry.getKey();
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150 String value = (String)entry.getValue();
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151 connectionProperties
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152 .append(key)
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153 .append('=')
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154 .append(value);
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155 if (iter.hasNext()) {
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156 connectionProperties.append(';');
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157 }
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158 }
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159 dbcpProperties.put(
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160 "connectionProperties", connectionProperties.toString());
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161 }
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162
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163 // Copy all DBCP properties removing the prefix
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164 for (Iterator iter = props.entrySet().iterator() ; iter.hasNext() ;) {
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165 Map.Entry entry = (Map.Entry)iter.next();
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166 String key = (String)entry.getKey();
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167 if (key.startsWith(PREFIX)) {
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168 String property = key.substring(PREFIX.length());
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169 String value = (String)entry.getValue();
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170 dbcpProperties.put(property, value);
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171 }
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172 }
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173
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174 // Backward-compatibility
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175 if (props.getProperty(DBCP_PS_MAXACTIVE) != null) {
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176 dbcpProperties.put(
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177 "poolPreparedStatements",
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178 String.valueOf(Boolean.TRUE));
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179 dbcpProperties.put(
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180 "maxOpenPreparedStatements",
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181 props.getProperty(DBCP_PS_MAXACTIVE));
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182 }
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183
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184 // Some debug info
181
4d9984411b3f Commented out a debug block because it leaks the db password.
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parents: 168
diff changeset
185 /* // commented out, because it leaks the password
168
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186 if (log.isDebugEnabled()) {
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187 log.debug("Creating a DBCP BasicDataSource" +
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188 " with the following DBCP factory properties:");
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189 StringWriter sw = new StringWriter();
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190 dbcpProperties.list(new PrintWriter(sw, true));
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191 log.debug(sw.toString());
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192 }
181
4d9984411b3f Commented out a debug block because it leaks the db password.
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diff changeset
193 */
168
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194
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195 // Let the factory create the pool
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196 ds = (BasicDataSource)BasicDataSourceFactory
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197 .createDataSource(dbcpProperties);
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198
5200
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199 // This needs to be done manually as it is somehow ignored
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200 // by the BasicDataSourceFactory if you set it as a dbcpProperty
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parents: 5193
diff changeset
201 String connectionInitSqls = props.getProperty("connectionInitSqls");
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parents: 5193
diff changeset
202 if (connectionInitSqls != null) {
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diff changeset
203 StringTokenizer tokenizer = new StringTokenizer(connectionInitSqls, ";");
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diff changeset
204 ds.setConnectionInitSqls(Collections.list(tokenizer));
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205 }
168
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206 // The BasicDataSource has lazy initialization
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207 // borrowing a connection will start the DataSource
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208 // and make sure it is configured correctly.
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209
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210 // Connection conn = ds.getConnection();
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211 // conn.close();
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212 }
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213 catch (Exception e) {
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214 String message = "Could not create a DBCP pool";
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215 log.fatal(message, e);
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216 if (ds != null) {
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217 BasicDataSource x = ds; ds = null;
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218 try {
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219 x.close();
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220 }
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221 catch (SQLException sqle) {
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222 }
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223 }
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224 throw new HibernateException(message, e);
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225 }
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226 log.debug("Configure DBCPConnectionProvider complete");
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227 }
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228
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229 public Connection getConnection() throws SQLException {
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230 return ds.getConnection();
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231 }
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232
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233 public void closeConnection(Connection conn) throws SQLException {
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234 conn.close();
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235 }
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236
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237 public void close() throws HibernateException {
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238 try {
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239 if (ds != null) {
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240 BasicDataSource x = ds; ds = null;
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241 x.close();
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242 }
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243 }
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244 catch (SQLException sqle) {
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245 throw new HibernateException("Could not close DBCP pool", sqle);
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246 }
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247 }
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248
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249 public boolean supportsAggressiveRelease() {
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250 return false;
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251 }
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252 }
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253 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org