Package edu.wisc.game.sql
Class Main
- java.lang.Object
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- edu.wisc.game.sql.Main
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public class Main extends Object
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Field Summary
Fields Modifier and Type Field Description static String
persistenceUnitName
This name will be used to configure the EntityManagerFactory based on the corresponding name in the META-INF/persistence.xml file
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Constructor Summary
Constructors Constructor Description Main()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static javax.persistence.EntityManager
getEM()
Creates a new EntityManager from the EntityManagerFactory.static javax.persistence.EntityManagerFactory
getFactory()
Initializes the EntityManagerFactory using the System properties.static int
getMyPid()
Finds the process id of the UNIX process for this application.static javax.persistence.EntityManager
getNewEM()
static void
memory()
Reports memory usestatic void
memory(String title)
Reports memory usestatic String
memoryInfo(String title, boolean doGc)
static void
persistObjects(Object... v)
See also https://download.oracle.com/otn-pub/jcp/persistence-2_1-fr-eval-spec/JavaPersistence.pdf, which says (in "3.2.2 Persisting an Entity Instance"): If X is a new entity, it becomes managed.static <T> void
saveObject(T o)
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Field Detail
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persistenceUnitName
public static final String persistenceUnitName
This name will be used to configure the EntityManagerFactory based on the corresponding name in the META-INF/persistence.xml file- See Also:
- Constant Field Values
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Method Detail
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getMyPid
public static int getMyPid()
Finds the process id of the UNIX process for this application. FIXME: This obviously is non-portable outside of UNIX.- Returns:
- PID, or -1 on failure
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getFactory
public static javax.persistence.EntityManagerFactory getFactory()
Initializes the EntityManagerFactory using the System properties. The "icd" name will be used to configure based on the corresponding name in the META-INF/persistence.xml file
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getEM
public static javax.persistence.EntityManager getEM()
Creates a new EntityManager from the EntityManagerFactory.
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getNewEM
public static javax.persistence.EntityManager getNewEM()
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memory
public static void memory()
Reports memory use
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memory
public static void memory(String title)
Reports memory use
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persistObjects
public static void persistObjects(Object... v)
See also https://download.oracle.com/otn-pub/jcp/persistence-2_1-fr-eval-spec/JavaPersistence.pdf, which says (in "3.2.2 Persisting an Entity Instance"):- If X is a new entity, it becomes managed. The entity X will be entered into the database at or before transaction commit or as a result of the flush operation.
- If X is a preexisting managed entity, it is ignored by the persist operation (...)
- If X is a detached object, the EntityExistsException may be thrown when the persist operation is invoked, or the EntityExistsException or another PersistenceException may be thrown at flush or commit time
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saveObject
public static <T> void saveObject(T o)
- Parameters:
o
- a detached object
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