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<div class="sect1">
<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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