/**
* Run a block of code in a JPA transaction.
*
* @param name The persistence unit name
* @param readOnly Is the transaction read-only?
* @param block Block of code to execute
*/
public <T> T withTransaction(String name, boolean readOnly, Supplier<T> block) {
EntityManager entityManager = null;
EntityTransaction tx = null;
try {
entityManager = em(name);
if (entityManager == null) {
throw new RuntimeException("No JPA entity manager defined for '" + name + "'");
}
JPA.bindForSync(entityManager);
if (!readOnly) {
tx = entityManager.getTransaction();
tx.begin();
}
T result = block.get();
if (tx != null) {
if (tx.getRollbackOnly()) {
tx.rollback();
} else {
tx.commit();
}
}
return result;
} catch (Throwable t) {
if (tx != null) {
try {
tx.rollback();
} catch (Throwable e) {
}
}
throw t;
} finally {
JPA.bindForSync(null);
if (entityManager != null) {
entityManager.close();
}
}
}
/** Returns the correct JPAConfig used to manage this entity-class */
public static JPAConfig getJPAConfig(Class clazz) {
return JPA.getJPAConfig(Entity2JPAConfigResolver.getJPAConfigNameForEntityClass(clazz));
}
protected JPAContext getJPAContext() {
if (_jpaConfig == null) {
_jpaConfig = JPA.getJPAConfig(jpaConfigName);
}
return _jpaConfig.getJPAContext();
}
@Override
public void afterFixtureLoad() {
JPA.clear();
}
/**
* clear current JPA context and transaction if JPAPlugin.autoTxs is true When using multiple
* databases in the same request this method tries to commit/rollback as many transactions as
* possible, but there is not guaranteed that all transactions are committed.
*
* @param rollback shall current transaction be committed (false) or cancelled (true)
*/
public static void closeTx(boolean rollback) {
if (autoTxs) {
JPA.closeTx(rollback);
}
}
/**
* initialize the JPA context and starts a JPA transaction if not already started.
*
* <p>This method is not needed since transaction is created automatically on first use.
*
* <p>It is better to specify readonly like this: @Transactional(readOnly=true)
*
* @param readonly true for a readonly transaction
* @deprecated use @Transactional with readOnly-property instead
*/
@Deprecated
public static void startTx(boolean readonly) {
// Create new transaction by getting the JPAContext
JPA.getJPAConfig(DBConfig.defaultDbConfigName).getJPAContext(readonly);
}
@Override
public void beforeInvocation() {
// just to be safe we must clear all possible previous
// JPAContexts in this thread
JPA.clearJPAContext();
}
@Override
public void onApplicationStop() {
JPA.close();
}
@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?");
}
}
}
/**
* Run a block of asynchronous code in a JPA transaction.
*
* @param name The persistence unit name
* @param readOnly Is the transaction read-only?
* @param block Block of code to execute.
* @deprecated This may cause deadlocks
*/
@Deprecated
public <T> F.Promise<T> withTransactionAsync(
String name, boolean readOnly, Supplier<F.Promise<T>> block) {
EntityManager entityManager = null;
EntityTransaction tx = null;
try {
entityManager = em(name);
if (entityManager == null) {
throw new RuntimeException("No JPA entity manager defined for '" + name + "'");
}
JPA.bindForAsync(entityManager);
if (!readOnly) {
tx = entityManager.getTransaction();
tx.begin();
}
F.Promise<T> result = block.get();
final EntityManager fem = entityManager;
final EntityTransaction ftx = tx;
F.Promise<T> committedResult =
(ftx == null)
? result
: result.map(
t -> {
if (ftx.getRollbackOnly()) {
ftx.rollback();
} else {
ftx.commit();
}
return t;
});
committedResult.onFailure(
t -> {
if (ftx != null) {
try {
if (ftx.isActive()) {
ftx.rollback();
}
} catch (Throwable e) {
}
}
try {
fem.close();
} finally {
JPA.bindForAsync(null);
}
});
committedResult.onRedeem(
t -> {
try {
fem.close();
} finally {
JPA.bindForAsync(null);
}
});
return committedResult;
} catch (Throwable t) {
if (tx != null) {
try {
tx.rollback();
} catch (Throwable e) {
}
}
if (entityManager != null) {
try {
entityManager.close();
} finally {
JPA.bindForAsync(null);
}
}
throw t;
}
}
public boolean isPersistent() {
return JPA.em().contains(this);
}
/**
* Retrieve the current entityManager
*
* @return the current entityManager
*/
public static EntityManager em() {
return JPA.em();
}
