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| <h2 id="index">Persistence Manager Factory<a id="Persistence_Manager_Factory"></a></h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Any JDO-enabled application will require at least one |
| <em>PersistenceManagerFactory</em>. Typically applications create one per |
| datastore being utilised. A <em>PersistenceManagerFactory</em> provides access |
| to <em>PersistenceManager</em>s which allow objects to be persisted, and |
| retrieved. The <em>PersistenceManagerFactory</em> can be configured to provide |
| particular behaviour.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The simplest way of creating a <em>PersistenceManagerFactory</em> |
| <a href="api20/apidocs/javax/jdo/PersistenceManagerFactory.html"><span class="image"><img src="images/javadoc.png" alt="image"></span></a> |
| is as follows</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>Properties properties = new Properties(); |
| properties.setProperty("javax.jdo.PersistenceManagerFactoryClass", |
| "{my_implementation_pmf_class}"); |
| properties.setProperty("javax.jdo.option.ConnectionDriverName","com.mysql.jdbc.Driver"); |
| properties.setProperty("javax.jdo.option.ConnectionURL","jdbc:mysql://localhost/myDB"); |
| properties.setProperty("javax.jdo.option.ConnectionUserName","login"); |
| properties.setProperty("javax.jdo.option.ConnectionPassword","password"); |
| PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory(properties);</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>A slight variation on this, is to use a file ("jdo.properties" for |
| example) to specify these properties like this</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>javax.jdo.PersistenceManagerFactoryClass={my_implementation_pmf_class} |
| javax.jdo.option.ConnectionDriverName=com.mysql.jdbc.Driver |
| javax.jdo.option.ConnectionURL=jdbc:mysql://localhost/myDB |
| javax.jdo.option.ConnectionUserName=login |
| javax.jdo.option.ConnectionPassword=password</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>and then to create the <em>PersistenceManagerFactory</em> using this file</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory("jdo.properties");</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>A final alternative would be to call |
| <em>JDOHelper.getPersistenceManagerFactory(jndiLocation, context);</em>, hence |
| accessing the properties via JNDI.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Whichever way we wish to obtain the <em>PersistenceManagerFactory</em> we have |
| defined a series of properties to give the behaviour of the |
| <em>PersistenceManagerFactory</em>. The first property specifies to use PMF of |
| the implementation required to be used, and the following 4 properties |
| define the datastore that it should connect to.</p> |
| </div> |
| <div class="paragraph"> |
| <p><br></p> |
| </div> |
| <div class="sect2"> |
| <h3 id="_standard_jdo_properties_a_id_standard_jdo_properties_a">Standard JDO Properties<a id="Standard_JDO_Properties"></a></h3> |
| <table class="tableblock frame-all grid-cols spread"> |
| <colgroup> |
| <col style="width: 50%;"> |
| <col style="width: 50%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Name</th> |
| <th class="tableblock halign-left valign-top">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.PersistenceManagerFactoryClass</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The name of the PersistenceManager implementation</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.ConnectionFactory</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Instance of a connection factory. For RBDMS, it must be an instance of |
| javax.sql.DataSource. <strong>This is for a transactional DataSource</strong></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.ConnectionFactory2</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Instance of a connection factory. For RBDMS, it must be an instance of |
| javax.sql.DataSource. <strong>This is for a non-transactional DataSource</strong></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.ConnectionFactoryName</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The JNDI name for a connection factory. For RBDMS, it must be a JNDI |
| name that points to a javax.sql.DataSource object. <strong>This is for a |
| transactional DataSource</strong></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.ConnectionFactory2Name</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The JNDI name for a connection factory. For RBDMS, it must be a JNDI |
| name that points to a javax.sql.DataSource object. <strong>This is for a |
| non-transactional DataSource</strong></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.ConnectionDriverName</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The name of the driver to use for the DB</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.ConnectionDriverURL</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">URL specifying the datastore to use for persistence</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.ConnectionUserName</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Username to use for connecting to the DB</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.ConnectionPassword</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Password to use for connecting to the DB</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.IgnoreCache</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Whether to ignore the cache for queries. Range of Values: true | false</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.Multithreaded</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Whether to run the PersistenceManager multithreaded. |
| Range of Values: true | false</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.NontransactionalRead</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Whether to allow nontransactional reads. |
| Range of Values: true | false</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.NontransactionalWrite</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Whether to allow nontransactional writes. |
| Range of Values: true | false</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.Optimistic</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Whether to use <a href="transactions.html">Optimistic transactions</a>. Range of Values: true | false</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.RetainValues</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Whether to suppress the clearing of values from persistent instances on |
| transaction completion. Range of Values: true | false</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.RestoreValues</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Whether persistent object have transactional field values restored when |
| transaction rollback occurs. Range of Values: true | false</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.Mapping</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Name for the ORM MetaData mapping files to use with this PMF. For |
| example if this is set to "mysql" then the implementation looks for |
| MetaData mapping files called "{classname}-mysql.orm" or |
| "package-mysql.orm". If this is not specified then the JDO |
| implementation assumes that all is specified in the JDO MetaData file. |
| <em>ORM datastores only</em></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.mapping.Catalog</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Name of the catalog to use by default for all classes persisted using |
| this PMF. This can be overridden in the MetaData where required, and is |
| optional. JPOX will prefix all table names with this catalog name if the |
| RDBMS supports specification of catalog names in DDL. <em>ORM datastores |
| only</em></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.mapping.Schema</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Name of the schema to use by default for all classes persisted using |
| this PMF. This can be overridden in the MetaData where required, and is |
| optional. JPOX will prefix all table names with this schema name if the |
| RDBMS supports specification of schema names in DDL. <em>ORM datastores |
| only</em></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.DetachAllOnCommit</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Allows the user to select that when a transaction is committed all |
| objects enlisted in that transaction will be automatically detached. |
| Range of Values: true | <strong>false</strong></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.CopyOnAttach</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Whether, when attaching a detached object, we create an attached copy or |
| simply migrate the detached object to attached state. This is from JDO |
| 2.1. Range of Values: <strong>true</strong> | false</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.TransactionType</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Type of transaction to use. If running under J2SE the default is |
| RESOURCE_LOCAL, and if running under J2EE the default is JTA. |
| Range of Values: RESOURCE_LOCAL | JTA</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.PersistenceUnitName</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Name of the "persistence-unit" to use with this PMF. This borrows the |
| "persistence-unit" concept from JPA for use with JDO 2.1.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.ServerTimeZoneID</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Id of the TimeZone under which the datastore server is running. If this |
| is not specified or is set to null it is assumed that the datastore |
| server is running in the same timezone as the JVM under which the |
| implementation is running.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.Name</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Name of the PMF. This is for use with "named PMF" functionality in JDO |
| 2.1</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.ReadOnly</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Whether this datastore should be treated as read only. Added in JDO 2.2 |
| Range of Values: true | <strong>false</strong></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><strong>javax.jdo.option.TransactionIsolationLevel</strong></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Isolation level to use for connections in the current transaction. Added |
| in JDO 2.2. Range of Values: none | read-committed | read-uncommitted | |
| repeatable-read | snapshot | serializable</p></td> |
| </tr> |
| </tbody> |
| </table> |
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