Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/backend/SessionFactoryProvider.java @ 4296:3051bc28ac43

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Added data object and factory for sediment load calculation. The factory provides two methods to get sediment load data: The first is to get an array of loads for a specific range at a river, these loads contain the time and description. The second is to get a single sediment load with time, description and data values.
author Raimund Renkert <rrenkert@intevation.de>
date Mon, 29 Oct 2012 12:14:50 +0100
parents 69f06b83b3ec
children fb9dcc68b9c2
rev   line source
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3035d861a576 SessionFactoryProvider for access to the backend.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1 package de.intevation.flys.backend;
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2
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3 import java.lang.management.ManagementFactory;
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4
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5 import java.util.Properties;
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7 import javax.management.InstanceAlreadyExistsException;
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8 import javax.management.MBeanRegistrationException;
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9 import javax.management.MBeanServer;
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10 import javax.management.MalformedObjectNameException;
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11 import javax.management.NotCompliantMBeanException;
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12 import javax.management.ObjectName;
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13
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14 import org.apache.log4j.Logger;
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16 import org.hibernate.SessionFactory;
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17
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18 import org.hibernate.cfg.Configuration;
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19 import org.hibernate.cfg.Environment;
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20
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21 import org.hibernate.impl.SessionFactoryImpl;
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23 import org.hibernate.jmx.StatisticsService;
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24
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25 public final class SessionFactoryProvider
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26 {
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27 private static Logger log = Logger.getLogger(SessionFactoryProvider.class);
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29 public static final boolean ENABLE_JMX =
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30 Boolean.getBoolean("flys.backend.enablejmx");
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31
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32 private static SessionFactory flysSessionFactory;
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33 private static SessionFactory sedDBSessionFactory;
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34
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35 private SessionFactoryProvider() {
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36 }
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38 public static synchronized SessionFactory getSessionFactory() {
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39 if (flysSessionFactory == null) {
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40 flysSessionFactory =
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41 createSessionFactory(FLYSCredentials.getInstance());
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42 }
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43 return flysSessionFactory;
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44 }
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45
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46 public static SessionFactory createSessionFactory() {
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47 return createSessionFactory(FLYSCredentials.getDefault());
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48 }
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49
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50 public static synchronized SessionFactory getSedDBSessionFactory() {
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51 if (sedDBSessionFactory == null) {
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52 sedDBSessionFactory =
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53 createSessionFactory(SedDBCredentials.getInstance());
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54 }
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55 return sedDBSessionFactory;
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56 }
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57
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58 public static SessionFactory createSedDBSessionFactory() {
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59 return createSessionFactory(SedDBCredentials.getDefault());
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60 }
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61
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62 public static SessionFactory createSessionFactory(
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63 Credentials credentials
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64 ) {
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65 Configuration cfg = createConfiguration(credentials);
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66
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67 SessionFactory factory = cfg.buildSessionFactory();
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68
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69 if (ENABLE_JMX) {
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70 registerAsMBean(factory);
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71 }
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72 else {
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73 log.info("No JMX support for hibernate.");
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74 }
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75
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76 return factory;
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77 }
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78
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79 public static void registerAsMBean(SessionFactory factory) {
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80
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81 StatisticsService statsMBean = new StatisticsService();
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82 statsMBean.setSessionFactory(factory);
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83 statsMBean.setStatisticsEnabled(true);
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84
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85 try {
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86 MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
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87 mbs.registerMBean(
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88 statsMBean,
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89 new ObjectName("Hibernate:application=Statistics"));
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90
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91 log.info("Enabled JMX support for hibernate.");
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92 }
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93 catch (MalformedObjectNameException mone) {
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94 log.warn(mone, mone);
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95 }
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96 catch (InstanceAlreadyExistsException iaee) {
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97 log.warn(iaee, iaee);
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98 }
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99 catch (MBeanRegistrationException mbre) {
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100 log.warn(mbre, mbre);
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101 }
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102 catch (NotCompliantMBeanException ncmbe) {
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103 log.warn(ncmbe, ncmbe);
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104 }
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105 }
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106
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107 public static Configuration createConfiguration() {
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108 return createConfiguration(FLYSCredentials.getInstance());
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109 }
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111 public static Configuration createConfiguration(
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112 Credentials credentials
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113 ) {
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114 Configuration cfg = new Configuration();
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115
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116 for (Class clazz: credentials.getClasses()) {
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117 cfg.addAnnotatedClass(clazz);
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118 }
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119
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120 if (log.isDebugEnabled()) {
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121 log.debug("user: " + credentials.getUser());
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122 log.debug("dialect: " + credentials.getDialect());
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123 log.debug("driver: " + credentials.getDriver());
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124 log.debug("url: " + credentials.getUrl());
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125 }
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126
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127 Properties props = new Properties();
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128
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129 // We rely on our own connection pool
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130 props.setProperty(
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131 "hibernate.connection.provider_class",
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132 "de.intevation.flys.utils.DBCPConnectionProvider");
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133
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134 props.setProperty(Environment.DIALECT, credentials.getDialect());
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135 props.setProperty(Environment.USER, credentials.getUser());
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136 props.setProperty(Environment.PASS, credentials.getPassword());
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137 props.setProperty(Environment.DRIVER, credentials.getDriver());
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138 props.setProperty(Environment.URL, credentials.getUrl());
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139
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140 cfg.mergeProperties(props);
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141
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142 return cfg;
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143 }
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144
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145
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146 public static String getProperty(SessionFactoryImpl factory, String key) {
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147 Properties props = factory.getProperties();
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148 return props.getProperty(key);
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149 }
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150
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151 public static String getUser(SessionFactoryImpl factory) {
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152 return getProperty(factory, Environment.USER);
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153 }
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154
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155
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156 public static String getPass(SessionFactoryImpl factory) {
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157 return getProperty(factory, Environment.PASS);
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158 }
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159
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160
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161 public static String getURL(SessionFactoryImpl factory) {
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162 return getProperty(factory, Environment.URL);
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163 }
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164
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165
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166 public static String getDriver(SessionFactoryImpl factory) {
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167 return getProperty(factory, Environment.DRIVER);
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168 }
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169 }
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170 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org