In your Hazelcast and/or Hazelcast Client declarative configuration, you can use variables to set the values of the elements. This is valid when you set a system property programmatically or you use the command line interface. You can use a variable in the declarative configuration to access the values of the system properties you set.
For example, see the following command that sets two system properties.
-Dgroup.name=dev -Dgroup.password=somepassword
Let's get the values of these system properties in the declarative configuration of Hazelcast, as shown below.
<hazelcast>
<group>
<name>${group.name}</name>
<password>${group.password}</password>
</group>
</hazelcast>
This also applies to the declarative configuration of Hazelcast Client, as shown below.
<hazelcast-client>
<group>
<name>${group.name}</name>
<password>${group.password}</password>
</group>
</hazelcast-client>
If you do not want to rely on the system properties, you can use the XmlConfigBuilder
and explicitly set a Properties
instance, as shown below.
Properties properties = new Properties();
// fill the properties, e.g. from database/LDAP, etc.
XmlConfigBuilder builder = new XmlConfigBuilder();
builder.setProperties(properties)
Config config = builder.build();
HazelcastInstance hz = Hazelcast.newHazelcastInstance(config);