Hazelcast is an in-memory data grid that provides a distributed map for fast, reliable storage and access of data in a clustered environment. It offers features such as simple configuration, automatic data partitioning and replication, fail-safety, scalability, and integration with Java interfaces and Spring. Developers can use Hazelcast to store and query data, distribute work across a cluster, and publish and subscribe to cluster-wide events.

1. Distributed in-
memory data
grid

2. Features
 Simple
 Reliable
 Fail-safe (automatic backups)
 Fast (data stored in-memory)
 Scalable
 Usage of JDK interfaces: List, Map, Set, Queue,
Lock, ExecutorService e.t.c.
 Decentralized topology
 Socket level traffic encryption
 Spring Integration
 Used by:

3. Hear of Hazelcast
HazelcastInstance node = Hazelcast.newHazelcastInstance(new Config());

4. Configuration
 In-code configuration
Config cfg = new Config();
Address address = new Address("localhost", 5701);
cfg.getNetworkConfig().getJoin().getTcpIpConfig().addAddress(address);
 XML file
<hazelcast xsi:schemaLocation="http://www.hazelcast.com/schema/config hazelcast-config-2.4.xsd"
xmlns="http://www.hazelcast.com/schema/config"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<group>
<name>dev</name>
<password>dev-pass</password>
</group>
<network>
<port auto-increment="true">5701</port>
<join>
<tcp-ip enabled="true">
<interface>127.0.0.1</interface>
</tcp-ip>
</join>
</network>
</hazelcast>

5. Collections (List, Set, Queue)
 Automatic data partitioning and propagation between
nodes
 Transaction support
 Write-Through and Write-Behind persistence
 Automatic replication (synchronous and asynchronous)

6. Distributed Map
 Automatic data partitioning and propagation
between nodes
 Transaction support
 Write-Through and Write-Behind persistence
 Automatic replication (synchronous and
asynchronous)
 SQL like queries
 Automatic Map-Reduce in queries

7. Topic
 Cluster-wide events
 Events are ordered

8. Bonus (ExecutorService)
 Distributed
 Broadcast execution
 Execution on specific node
 Load balancing

9. Site: http://www.hazelcast.com/
Documentation: http://www.hazelcast.com/docs.jsp
Skype: albul.alexander
Email: aalbul@lohika.com, gorenuru@gmail.com