[507] | 1 | package gov.hhs.fha.nhinc.gateway.aggregator.persistence;
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| 2 |
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| 3 | import java.io.Serializable;
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| 4 | import org.apache.commons.logging.Log;
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| 5 | import org.apache.commons.logging.LogFactory;
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| 6 |
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| 7 | import org.hibernate.SessionFactory;
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| 8 | import org.hibernate.cfg.Configuration;
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| 9 | import org.hibernate.Session;
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| 10 | import org.hibernate.Transaction;
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| 11 |
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| 12 |
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| 13 | /**
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| 14 | * Utility to obtain hibernate connections.
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| 15 | *
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| 16 | * @author Neil Webb, Les Westberg
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| 17 | */
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| 18 | public class HibernateUtil
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| 19 | {
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| 20 | private static Log log = LogFactory.getLog(HibernateUtil.class);
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| 21 | private static final SessionFactory sessionFactory;
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| 22 | private static final String HIBERNATE_CONFIG = "aggregator.cfg.xml";
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| 23 |
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| 24 | static
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| 25 | {
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| 26 | try
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| 27 | {
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| 28 | // Create the SessionFactory from hibernate.cfg.xml
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| 29 | sessionFactory = new Configuration().configure(HIBERNATE_CONFIG).buildSessionFactory();
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| 30 | } catch (Throwable ex)
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| 31 | {
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| 32 | // Make sure you log the exception, as it might be swallowed
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| 33 | System.err.println("Initial SessionFactory creation failed." + ex);
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| 34 | throw new ExceptionInInitializerError(ex);
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| 35 | }
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| 36 | }
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| 37 |
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| 38 | /**
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| 39 | * Return the session factory singleton object.
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| 40 | *
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| 41 | * @return The session factory.
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| 42 | */
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| 43 | public static SessionFactory getSessionFactory()
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| 44 | {
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| 45 | return sessionFactory;
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| 46 | }
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| 47 |
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| 48 | /**
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| 49 | * This method saves the specified data into the tables associatd with
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| 50 | * the Hibernate objects
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| 51 | *
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| 52 | * @param oObject An instance of the Hibernate object that is to be saved.
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| 53 | * @param sObjectId The ID of the hibernate object. If this is a new record, then
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| 54 | * leave this field blank. This field is used for log entry
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| 55 | * purposes.
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| 56 | * @param sObjectIdFieldName The name of the field that represents the Object's ID. This
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| 57 | * is used for log entry purposes.
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| 58 | */
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| 59 | public static void save(Object oObject, String sObjectId, String sObjectIdFieldName)
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| 60 | {
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| 61 | String sLocalObjId = "";
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| 62 |
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| 63 | if ((sObjectId == null) ||
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| 64 | (sObjectId.length() <= 0))
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| 65 | {
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| 66 | sLocalObjId = "New record";
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| 67 | }
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| 68 | else
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| 69 | {
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| 70 | sLocalObjId = sObjectId;
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| 71 | }
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| 72 |
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| 73 | log.debug("Performing save for " + sObjectIdFieldName + ": " + sLocalObjId);
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| 74 | Session oSession = null;
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| 75 | Transaction oTransaction = null;
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| 76 | try
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| 77 | {
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| 78 | SessionFactory oSessionFactory = HibernateUtil.getSessionFactory();
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| 79 | if (oSessionFactory != null)
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| 80 | {
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| 81 | oSession = oSessionFactory.openSession();
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| 82 | if (oSession != null)
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| 83 | {
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| 84 | oTransaction = oSession.beginTransaction();
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| 85 | oSession.saveOrUpdate(oObject);
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| 86 | }
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| 87 | else
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| 88 | {
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| 89 | log.error("Failed to obtain a session from the sessionFactory while saving " +
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| 90 | sObjectIdFieldName + ": " + sLocalObjId);
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| 91 | }
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| 92 | }
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| 93 | else
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| 94 | {
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| 95 | log.error("Session factory was null while saving " + sObjectIdFieldName +
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| 96 | ": " + sLocalObjId);
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| 97 | }
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| 98 | }
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| 99 | finally
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| 100 | {
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| 101 | if (oTransaction != null)
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| 102 | {
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| 103 | try
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| 104 | {
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| 105 | oTransaction.commit();
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| 106 | }
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| 107 | catch (Throwable t)
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| 108 | {
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| 109 | log.error("Failed to commit transaction for " + sObjectIdFieldName + ": " +
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| 110 | sLocalObjId + ". Message: " + t.getMessage(), t);
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| 111 | }
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| 112 | }
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| 113 | if (oSession != null)
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| 114 | {
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| 115 | try
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| 116 | {
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| 117 | oSession.close();
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| 118 | }
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| 119 | catch (Throwable t)
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| 120 | {
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| 121 | log.error("Failed to close session for " + sObjectIdFieldName + ": " +
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| 122 | sLocalObjId + ". Message: " + t.getMessage(), t);
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| 123 | }
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| 124 | }
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| 125 | }
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| 126 |
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| 127 | log.debug("Completed document save for " + sObjectIdFieldName + ": " + sLocalObjId);
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| 128 | }
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| 129 |
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| 130 | /**
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| 131 | * Delete a row in table associated with the specified Hibernate class.
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| 132 | *
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| 133 | * @param object An instance of the specific Hibernate object that is to be deleted.
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| 134 | * @param sObjectId The ID of the hibernate object. This field is used for log entry
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| 135 | * purposes.
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| 136 | * @param sObjectIdFieldName The name of the field that represents the Object's ID. This
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| 137 | * is used for log entry purposes.
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| 138 | */
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| 139 | public static void delete(Object oObject, String sObjectId, String sObjectIdFieldName)
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| 140 | {
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| 141 | log.debug("Performing delete for " + sObjectIdFieldName + ": " + sObjectId);
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| 142 |
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| 143 | Session oSession = null;
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| 144 | Transaction oTransaction = null;
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| 145 |
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| 146 | try
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| 147 | {
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| 148 | SessionFactory oSessionFactory = HibernateUtil.getSessionFactory();
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| 149 | if (oSessionFactory != null)
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| 150 | {
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| 151 | oSession = oSessionFactory.openSession();
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| 152 | if (oSession != null)
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| 153 | {
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| 154 | oTransaction = oSession.beginTransaction();
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| 155 | oSession.delete(oObject);
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| 156 | }
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| 157 | else
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| 158 | {
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| 159 | log.error("Failed to obtain a session from the sessionFactory " +
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| 160 | "while deleting " + sObjectIdFieldName + ": " + sObjectId);
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| 161 | }
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| 162 | }
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| 163 | else
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| 164 | {
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| 165 | log.error("Session factory was null while attempting to delete " +
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| 166 | sObjectIdFieldName + ": " + sObjectId);
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| 167 | }
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| 168 | }
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| 169 | finally
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| 170 | {
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| 171 | if (oTransaction != null)
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| 172 | {
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| 173 | try
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| 174 | {
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| 175 | oTransaction.commit();
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| 176 |
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| 177 | }
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| 178 | catch (Throwable t)
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| 179 | {
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| 180 | log.error("Failed to commit transaction for " + sObjectIdFieldName + ": " +
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| 181 | sObjectId + ". Message: " + t.getMessage(), t);
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| 182 | }
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| 183 | }
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| 184 | if (oSession != null)
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| 185 | {
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| 186 | try
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| 187 | {
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| 188 | oSession.close();
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| 189 | }
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| 190 | catch (Throwable t)
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| 191 | {
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| 192 | log.error("Failed to close session for " + sObjectIdFieldName + ": " +
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| 193 | sObjectId + ". Message: " + t.getMessage(), t);
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| 194 | }
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| 195 | }
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| 196 | }
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| 197 |
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| 198 | log.debug("Completed delete for " + sObjectIdFieldName +
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| 199 | ": " + sObjectId);
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| 200 | }
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| 201 |
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| 202 | /**
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| 203 | * Retrieve a record by identifier (TransactionId)
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| 204 | *
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| 205 | * @param oClass The class object for the Hibernate data object.
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| 206 | * @param oObjectId The object ID to be used in the call to find the object.
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| 207 | * @param sObjectId The ID of the hibernate object. This field is used for log entry
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| 208 | * purposes.
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| 209 | * @param sObjectIdFieldName The name of the field that represents the Object's ID. This
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| 210 | * is used for log entry purposes.
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| 211 | * @return The retrieved data. The caller is responsible to cast this to the
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| 212 | * correct type..
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| 213 | */
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| 214 | public static Object findById(Class oClass, Serializable oObjectId, String sObjectId, String sObjectIdFieldName)
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| 215 | {
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| 216 | log.debug("Performing findById(" + sObjectId + ").");
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| 217 | Object oObject = null;
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| 218 | Session oSession = null;
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| 219 | try
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| 220 | {
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| 221 | SessionFactory oSessionFactory = HibernateUtil.getSessionFactory();
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| 222 | if (oSessionFactory != null)
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| 223 | {
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| 224 | oSession = oSessionFactory.openSession();
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| 225 | if (oSession != null)
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| 226 | {
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| 227 | oObject = oSession.get(oClass, oObjectId);
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| 228 | }
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| 229 | else
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| 230 | {
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| 231 | log.error("Failed to obtain a session from the sessionFactory " +
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| 232 | "while retrieving " + sObjectIdFieldName + ":" + sObjectId);
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| 233 | }
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| 234 | }
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| 235 | else
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| 236 | {
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| 237 | log.error("Session factory was null while retrieving " + sObjectIdFieldName +
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| 238 | ": " + sObjectId);
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| 239 | }
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| 240 |
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| 241 | if (log.isDebugEnabled())
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| 242 | {
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| 243 | log.debug("Completed findById(" + sObjectId + ")" +
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| 244 | ". Result was: " + ((oObject == null) ? "not " : "") + "found");
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| 245 | }
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| 246 | }
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| 247 | finally
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| 248 | {
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| 249 | if (oSession != null)
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| 250 | {
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| 251 | try
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| 252 | {
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| 253 | oSession.close();
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| 254 | }
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| 255 | catch (Throwable t)
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| 256 | {
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| 257 | log.error("Failed to close session for " + sObjectIdFieldName + ":" +
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| 258 | sObjectId + ". Message: " + t.getMessage(), t);
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| 259 | }
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| 260 | }
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| 261 | }
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| 262 | return oObject;
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| 263 | }
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| 264 |
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| 265 |
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| 266 | }
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