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Ignite In-Memory Data Fabric is developed predominantly in Java, and provides native support for other languages. It is designed to deliver uncompromised performance for a wide set of in-memory computing use cases - from high performance computing, to the industry most advanced data grid, CEP, and data streaming.
Ignite data grid is an in-memory key-value store which enables caching data in-memory within distributed clusters. It supports ACID Transactions, SQL Queries, Distributed SQL Joins, Messaging and Events, Data Streaming, and more.
Ignite also supports Cross-platform Interoperability by writing objects to cache in a common binary format allowing application to seamlessly interoperate between Java, .NET and C++.

Ignite ignite = Ignition.ignite(); IgniteCache<Integer, String> cache = ignite.cache(CACHE_NAME); // Store keys in cache (values will end up on different cache nodes). for (int i = 0; i < 10; i++) cache.put(i, Integer.toString(i)); for (int i = 0; i < 10; i++) System.out.println("Got [key=" + i + ", val=" + cache.get(i) + ']');
try (Transaction tx = transactions.txStart()) { Integer hello = cache.get("Hello"); if (hello == 1) cache.put("Hello", 11); cache.put("World", 22); tx.commit(); }
IgniteCache<Long, Person> cache = ignite.cache("personCache"); SqlQuery sql = new SqlQuery(Person.class, "salary > ?"); // Find persons earning more than 1,000. try (QueryCursor<Entry<Long, Person>> cursor = cache.query(sql.setArgs(1000))) { for (Entry<Long, Person> e : cursor) System.out.println(e.getValue().toString()); }
IgniteCache<Long, Person> cache = ignite.cache("personCache"); // SQL join on Person and Organization. SqlQuery sql = new SqlQuery(Person.class, "from Person as p, \"orgCache\".Organization as org " + "where p.orgId = org.id " + "and lower(org.name) = lower(?)"); // Find all persons working for Ignite organization. try (QueryCursor<Entry<Long, Person>> cursor = cache.query(sql.setArgs("Ignite"))) { for (Entry<Long, Person> e : cursor) System.out.println(e.getValue().toString()); }
Also see Ignite Java examples available on GitHub.