com.guicedee.guicedpersistence.db.DatabaseModule Maven / Gradle / Ivy
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package com.guicedee.guicedpersistence.db;
import com.google.inject.AbstractModule;
import com.google.inject.Key;
import com.google.inject.Singleton;
import com.guicedee.guicedinjection.GuiceContext;
import com.guicedee.guicedinjection.interfaces.IGuiceModule;
import com.guicedee.guicedinjection.interfaces.IGuicePostStartup;
import com.guicedee.guicedpersistence.services.IPropertiesEntityManagerReader;
import com.guicedee.guicedpersistence.injectors.JpaPersistPrivateModule;
import com.guicedee.guicedpersistence.scanners.PersistenceFileHandler;
import com.guicedee.logger.LogFactory;
import com.oracle.jaxb21.PersistenceUnit;
import com.oracle.jaxb21.Property;
import javax.persistence.EntityManager;
import javax.sql.DataSource;
import javax.validation.constraints.NotNull;
import java.lang.annotation.Annotation;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* An abstract implementation for persistence.xml
*
* Configuration conf = TransactionManagerServices.getConfiguration(); can be used to configure the transaction manager.
*/
public abstract class DatabaseModule>
extends AbstractModule
implements IGuiceModule
{
/**
* Field log
*/
private static final Logger log = LogFactory.getLog("DatabaseModule");
/**
* A set of all annotations that this abstraction built
*/
private static final Set> boundAnnotations = new HashSet<>();
/**
* Constructor DatabaseModule creates a new DatabaseModule instance.
*/
public DatabaseModule()
{
//Config required
}
/**
* Returns a full list of all annotations that have bindings
*
* @return The set of all annotations that have bindings
*/
public static Set> getBoundAnnotations()
{
return DatabaseModule.boundAnnotations;
}
/**
* Configures the module with the bindings
*/
@SuppressWarnings("unchecked")
@Override
protected void configure()
{
DatabaseModule.log.config("Loading Database Module - " + getClass().getName() + " - " + getPersistenceUnitName());
Properties jdbcProperties = getJDBCPropertiesMap();
PersistenceUnit pu = getPersistenceUnit();
if (pu == null)
{
DatabaseModule.log
.severe("Unable to register persistence unit with name " + getPersistenceUnitName() + " - No persistence unit containing this name was found.");
return;
}
for (IPropertiesEntityManagerReader entityManagerReader : GuiceContext.instance()
.getLoader(IPropertiesEntityManagerReader.class, true,
ServiceLoader.load(IPropertiesEntityManagerReader.class)))
{
Map output = entityManagerReader.processProperties(pu, jdbcProperties);
if (output != null && !output.isEmpty())
{
jdbcProperties.putAll(output);
}
}
ConnectionBaseInfo connectionBaseInfo = getConnectionBaseInfo(pu, jdbcProperties);
connectionBaseInfo.populateFromProperties(pu, jdbcProperties);
if (connectionBaseInfo.getJndiName() == null)
{
connectionBaseInfo.setJndiName(getJndiMapping());
}
DatabaseModule.log.fine(getPersistenceUnitName() + " - Connection Base Info Final - " + connectionBaseInfo);
install(new JpaPersistPrivateModule(getPersistenceUnitName(), jdbcProperties, getBindingAnnotation()));
ConnectionBaseInfo ds;
DbStartup startup = new DbStartup(getBindingAnnotation(),getJndiMapping());
if(isDataSourceAvailable())
{
DatabaseModule.log.log(Level.FINE, "Bound DataSource.class with @" + getBindingAnnotation().getSimpleName());
DbStartup.getAvailableDataSources()
.add(getBindingAnnotation());
bind(getDataSourceKey()).toProvider(startup).in(Singleton.class);
}
DbStartup.getLoadedConnectionBaseInfos().put(getJndiMapping(), connectionBaseInfo);
GuiceContext.instance().loadPostStartupServices();
GuiceContext.getAllLoadedServices()
.get(IGuicePostStartup.class)
.add(startup);
log.config("Starting Datasource - " + getBindingAnnotation() + " - " + getJndiMapping());
new DatasourceStartup(getBindingAnnotation(), getJndiMapping()).postLoad();
DatabaseModule.log.log(Level.FINE, "Bound PersistenceUnit.class with @" + getBindingAnnotation().getSimpleName());
bind(Key.get(PersistenceUnit.class, getBindingAnnotation())).toInstance(pu);
DatabaseModule.boundAnnotations.add(getBindingAnnotation());
}
/**
* The name found in persistence.xml
*
* @return The persistence unit name to sear h
*/
@NotNull
protected abstract String getPersistenceUnitName();
/**
* Returns the persistence unit associated with the supplied name
*
* @return The given persistence unit
*/
protected PersistenceUnit getPersistenceUnit()
{
try
{
for (PersistenceUnit pu : PersistenceFileHandler.getPersistenceUnits())
{
if (pu.getName()
.equals(getPersistenceUnitName()))
{
return pu;
}
}
}
catch (Throwable T)
{
DatabaseModule.log.log(Level.SEVERE, "Couldn't Find Persistence Unit for the given name [" + getPersistenceUnitName() + "]", T);
}
DatabaseModule.log.log(Level.WARNING, "Couldn't Find Persistence Unit for the given name [" + getPersistenceUnitName() + "]. Returning a Null Instance");
return null;
}
/**
* Builds up connection base data info from a persistence unit.
*
* Use with the utility methods e.g.
*
* @param unit
* The physical persistence unit, changes have no effect the persistence ready
*
* @return The new connetion base info
*/
@NotNull
protected abstract ConnectionBaseInfo getConnectionBaseInfo(PersistenceUnit unit, Properties filteredProperties);
/**
* A properties map of the properties from the file
*
* @return A properties map of the given persistence units properties
*/
@NotNull
private Properties getJDBCPropertiesMap()
{
Properties jdbcProperties = new Properties();
PersistenceUnit pu = getPersistenceUnit();
configurePersistenceUnitProperties(pu, jdbcProperties);
return jdbcProperties;
}
/**
* The name found in jta-data-source from the persistence.xml
*
* @return The JNDI mapping name to use
*/
@NotNull
protected abstract String getJndiMapping();
/**
* Returns the generated key for the data source
*
* @return The key of the annotation and data source
*/
@NotNull
protected Key getDataSourceKey()
{
return Key.get(DataSource.class, getBindingAnnotation());
}
/**
* Returns the key used for the entity manager
*
* @return The key for the entity manager and the annotation
*/
@NotNull
protected Key getEntityManagerKey()
{
return Key.get(EntityManager.class, getBindingAnnotation());
}
/**
* The annotation which will identify this guy
*
* @return The annotation that will identify the given databsae
*/
@NotNull
protected abstract Class getBindingAnnotation();
/**
* Builds a property map from a persistence unit properties file
*
* Overwrites ${} items with system properties
*
* @param pu
* The persistence unit
* @param jdbcProperties
* The final properties map
*/
protected void configurePersistenceUnitProperties(PersistenceUnit pu, Properties jdbcProperties)
{
if (pu != null)
{
try
{
for (Property props : pu.getProperties()
.getProperty())
{
jdbcProperties.put(props.getName(), props.getValue());
}
}
catch (Throwable t)
{
log.log(Level.SEVERE, "Unable to load persistence unit properties for [" + pu.getName() + "]", t);
}
}
}
@Override
public Integer sortOrder()
{
return 50;
}
public boolean isDataSourceAvailable()
{
return true;
}
}