private List<Class> findEntityClassesForThisConfig(String configName, String propPrefix) {
// look and see if we have any Entity-objects for this db config
List<Class> classes = Play.classloader.getAnnotatedClasses(Entity.class);
// filter list on Entities meant for us..
List<Class> filteredClasses = new ArrayList<Class>(classes.size());
for (Class clazz : classes) {
if (configName.equals(Entity2JPAConfigResolver.getJPAConfigNameForEntityClass(clazz))) {
filteredClasses.add(clazz);
}
}
if (!Play.configuration.getProperty(propPrefix + "jpa.entities", "").equals("")) {
return filteredClasses;
}
if (filteredClasses.isEmpty()) {
return null;
}
return filteredClasses;
}
/** Returns the correct JPAConfig used to manage this entity-class */
public static JPAConfig getJPAConfig(Class clazz) {
return JPA.getJPAConfig(Entity2JPAConfigResolver.getJPAConfigNameForEntityClass(clazz));
}
public JPAModelLoader(Class<? extends Model> clazz) {
this.clazz = clazz;
// must detect correct JPAConfig for this model
this.jpaConfigName = Entity2JPAConfigResolver.getJPAConfigNameForEntityClass(clazz);
}
@Override
public void onApplicationStart() {
// must check and configure JPA for each DBConfig
for (DBConfig dbConfig : DB.getDBConfigs()) {
// check and enable JPA on this config
// is JPA already configured?
String configName = dbConfig.getDBConfigName();
if (JPA.getJPAConfig(configName, true) == null) {
// must configure it
// resolve prefix for hibernate config..
// should be nothing for default, and db_<name> for others
String propPrefix = "";
if (!DBConfig.defaultDbConfigName.equalsIgnoreCase(configName)) {
propPrefix = "db_" + configName + ".";
}
List<Class> classes = findEntityClassesForThisConfig(configName, propPrefix);
if (classes == null) continue;
// we're ready to configure this instance of JPA
final String hibernateDataSource =
Play.configuration.getProperty(propPrefix + "hibernate.connection.datasource");
if (StringUtils.isEmpty(hibernateDataSource) && dbConfig == null) {
throw new JPAException(
"Cannot start a JPA manager without a properly configured database"
+ getConfigInfoString(configName),
new NullPointerException("No datasource configured"));
}
Ejb3Configuration cfg = new Ejb3Configuration();
if (dbConfig.getDatasource() != null) {
cfg.setDataSource(dbConfig.getDatasource());
}
if (!Play.configuration
.getProperty(propPrefix + "jpa.ddl", Play.mode.isDev() ? "update" : "none")
.equals("none")) {
cfg.setProperty(
"hibernate.hbm2ddl.auto",
Play.configuration.getProperty(propPrefix + "jpa.ddl", "update"));
}
String driver = null;
if (StringUtils.isEmpty(propPrefix)) {
driver = Play.configuration.getProperty("db.driver");
} else {
driver = Play.configuration.getProperty(propPrefix + "driver");
}
cfg.setProperty("hibernate.dialect", getDefaultDialect(propPrefix, driver));
cfg.setProperty("javax.persistence.transaction", "RESOURCE_LOCAL");
cfg.setInterceptor(new PlayInterceptor());
// This setting is global for all JPAs - only configure if configuring default JPA
if (StringUtils.isEmpty(propPrefix)) {
if (Play.configuration.getProperty(propPrefix + "jpa.debugSQL", "false").equals("true")) {
org.apache.log4j.Logger.getLogger("org.hibernate.SQL").setLevel(Level.ALL);
} else {
org.apache.log4j.Logger.getLogger("org.hibernate.SQL").setLevel(Level.OFF);
}
}
// inject additional hibernate.* settings declared in Play! configuration
Properties additionalProperties =
(Properties)
Utils.Maps.filterMap(Play.configuration, "^" + propPrefix + "hibernate\\..*");
// We must remove prefix from names
Properties transformedAdditionalProperties = new Properties();
for (Map.Entry<Object, Object> entry : additionalProperties.entrySet()) {
Object key = entry.getKey();
if (!StringUtils.isEmpty(propPrefix)) {
key = ((String) key).substring(propPrefix.length()); // chop off the prefix
}
transformedAdditionalProperties.put(key, entry.getValue());
}
cfg.addProperties(transformedAdditionalProperties);
try {
// nice hacking :) I like it..
Field field = cfg.getClass().getDeclaredField("overridenClassLoader");
field.setAccessible(true);
field.set(cfg, Play.classloader);
} catch (Exception e) {
Logger.error(
e, "Error trying to override the hibernate classLoader (new hibernate version ???)");
}
for (Class<?> clazz : classes) {
cfg.addAnnotatedClass(clazz);
if (Logger.isTraceEnabled()) {
Logger.trace("JPA Model : %s", clazz);
}
}
String[] moreEntities =
Play.configuration.getProperty(propPrefix + "jpa.entities", "").split(", ");
for (String entity : moreEntities) {
if (entity.trim().equals("")) {
continue;
}
try {
cfg.addAnnotatedClass(Play.classloader.loadClass(entity));
} catch (Exception e) {
Logger.warn("JPA -> Entity not found: %s", entity);
}
}
for (ApplicationClass applicationClass : Play.classes.all()) {
if (applicationClass.isClass() || applicationClass.javaPackage == null) {
continue;
}
Package p = applicationClass.javaPackage;
Logger.info("JPA -> Adding package: %s", p.getName());
cfg.addPackage(p.getName());
}
String mappingFile = Play.configuration.getProperty(propPrefix + "jpa.mapping-file", "");
if (mappingFile != null && mappingFile.length() > 0) {
cfg.addResource(mappingFile);
}
if (Logger.isTraceEnabled()) {
Logger.trace("Initializing JPA" + getConfigInfoString(configName) + " ...");
}
try {
JPA.addConfiguration(configName, cfg);
} catch (PersistenceException e) {
throw new JPAException(
e.getMessage() + getConfigInfoString(configName),
e.getCause() != null ? e.getCause() : e);
}
}
}
// must look for Entity-objects referring to none-existing JPAConfig
List<Class> allEntityClasses = Play.classloader.getAnnotatedClasses(Entity.class);
for (Class clazz : allEntityClasses) {
String configName = Entity2JPAConfigResolver.getJPAConfigNameForEntityClass(clazz);
if (JPA.getJPAConfig(configName, true) == null) {
throw new JPAException(
"Found Entity-class ("
+ clazz.getName()
+ ") referring to none-existing JPAConfig"
+ getConfigInfoString(configName)
+ ". "
+ "Is JPA properly configured?");
}
}
}