/**
* Executes example.
*
* @param args Command line arguments, none required.
* @throws IgniteException If example execution failed.
*/
public static void main(String[] args) throws IgniteException {
ExamplesUtils.checkMinMemory(MIN_MEMORY);
// To start ignite with desired configuration uncomment the appropriate line.
try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
System.out.println();
System.out.println(">>> Cache store example started.");
CacheConfiguration<Long, Person> cacheCfg = new CacheConfiguration<>(CACHE_NAME);
// Set atomicity as transaction, since we are showing transactions in example.
cacheCfg.setAtomicityMode(TRANSACTIONAL);
// Configure JDBC store.
cacheCfg.setCacheStoreFactory(FactoryBuilder.factoryOf(CacheJdbcPersonStore.class));
// Configure JDBC session listener.
cacheCfg.setCacheStoreSessionListenerFactories(
new Factory<CacheStoreSessionListener>() {
@Override
public CacheStoreSessionListener create() {
CacheJdbcStoreSessionListener lsnr = new CacheJdbcStoreSessionListener();
lsnr.setDataSource(CacheJdbcPersonStore.DATA_SRC);
return lsnr;
}
});
cacheCfg.setReadThrough(true);
cacheCfg.setWriteThrough(true);
try (IgniteCache<Long, Person> cache = ignite.getOrCreateCache(cacheCfg)) {
// Make initial cache loading from persistent store. This is a
// distributed operation and will call CacheStore.loadCache(...)
// method on all nodes in topology.
loadCache(cache);
// Start transaction and execute several cache operations with
// read/write-through to persistent store.
executeTransaction(cache);
}
}
}
/**
* Executes example.
*
* @param args Command line arguments, none required.
* @throws IgniteException If example execution failed.
*/
public static void main(String[] args) throws IgniteException {
// Start the node, run the example, and stop the node when finished.
try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
// We use a single session factory, but create a dedicated session
// for each transaction or query. This way we ensure that L1 cache
// is not used (L1 cache has per-session scope only).
System.out.println();
System.out.println(">>> Hibernate L2 cache example started.");
try (
// Create all required caches.
IgniteCache c1 = createCache("org.hibernate.cache.spi.UpdateTimestampsCache", ATOMIC);
IgniteCache c2 = createCache("org.hibernate.cache.internal.StandardQueryCache", ATOMIC);
IgniteCache c3 =
createCache("org.apache.ignite.examples.datagrid.hibernate.User", TRANSACTIONAL);
IgniteCache c4 =
createCache(
"org.apache.ignite.examples.datagrid.hibernate.User.posts", TRANSACTIONAL);
IgniteCache c5 =
createCache("org.apache.ignite.examples.datagrid.hibernate.Post", TRANSACTIONAL)) {
URL hibernateCfg = ExamplesUtils.url(HIBERNATE_CFG);
SessionFactory sesFactory = createHibernateSessionFactory(hibernateCfg);
System.out.println();
System.out.println(">>> Creating objects.");
final long userId;
Session ses = sesFactory.openSession();
try {
Transaction tx = ses.beginTransaction();
User user = new User("jedi", "Luke", "Skywalker");
user.getPosts().add(new Post(user, "Let the Force be with you."));
ses.save(user);
tx.commit();
// Create a user object, store it in DB, and save the database-generated
// object ID. You may try adding more objects in a similar way.
userId = user.getId();
} finally {
ses.close();
}
// Output L2 cache and Ignite cache stats. You may notice that
// at this point the object is not yet stored in L2 cache, because
// the read was not yet performed.
printStats(sesFactory);
System.out.println();
System.out.println(">>> Querying object by ID.");
// Query user by ID several times. First time we get an L2 cache
// miss, and the data is queried from DB, but it is then stored
// in cache and successive queries hit the cache and return
// immediately, no SQL query is made.
for (int i = 0; i < 3; i++) {
ses = sesFactory.openSession();
try {
Transaction tx = ses.beginTransaction();
User user = (User) ses.get(User.class, userId);
System.out.println("User: "******"\tPost: " + post);
tx.commit();
} finally {
ses.close();
}
}
// Output the stats. We should see 1 miss and 2 hits for
// User and Collection object (stored separately in L2 cache).
// The Post is loaded with the collection, so it won't imply
// a miss.
printStats(sesFactory);
}
}
}