How to configure Hazelcast for session caching using spring while limiting it to a set of nodes? - spring

Question

I need to set up Hazelcast session caching using Spring. Using the configuration from the hazelcast docs is simple. However, its insufficient. I need to use a different configuration file for each one of my environments (DEV, QA, PROD). Alternatively (Ideally), I would like to use several properties from a spring bean that would be set during the initialization of the spring container. According to the hazelcast documentation, all I need to do set a group for each of my environments. like so:
<hazelcast>
<group>
<name>dev</name>
<password>dev-pass</password>
</group>
...
</hazelcast>
As a bonus, I would like the cache to be a single cache used for both sessions and application level objects (Maps, Queues, etc).
Could anyone share an example on how they would do this? Thank you for your help.

Answer 1

Thank you for the suggested answer. However, I think I've solved this using the following configuration. I would appreciate any feedback from anyone about this configuration.
My approach:
1) Establish the instance with a spring configuration.
2) Enhance the instance with a minimally configured hazelcast.xml file with the Web filter configuration. Note that mulitcast and tcp-ip joiners are false.
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/spring/servlet-context.xml,
/WEB-INF/spring/root-context.xml,
....
/WEB-INF/spring/hazelcastContext.xml
</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
....
<filter>
<filter-name>hazelcast-filter</filter-name>
<filter-class>com.hazelcast.web.WebFilter</filter-class>
<!--
Name of the distributed map storing
your web session objects
-->
<init-param>
<param-name>map-name</param-name>
<param-value>my-sessions</param-value>
</init-param>
<!--
How is your load-balancer configured?
stick-session means all requests of a session
is routed to the node where the session is first created.
This is excellent for performance.
If sticky-session is set to false, when a session is updated
on a node, entry for this session on all other nodes is invalidated.
You have to know how your load-balancer is configured before
setting this parameter. Default is true.
-->
<init-param>
<param-name>sticky-session</param-name>
<param-value>true</param-value>
</init-param>
<!--
Name of session id cookie
-->
<init-param>
<param-name>cookie-name</param-name>
<param-value>hazelcast.sessionId</param-value>
</init-param>
<!--
Domain of session id cookie. Default is based on incoming request.
-->
<init-param>
<param-name>cookie-domain</param-name>
<param-value>.mycompany.com</param-value>
</init-param>
<!--
Should cookie only be sent using a secure protocol? Default is false.
-->
<init-param>
<param-name>cookie-secure</param-name>
<param-value>false</param-value>
</init-param>
<!--
Should HttpOnly attribute be set on cookie ? Default is false.
-->
<init-param>
<param-name>cookie-http-only</param-name>
<param-value>false</param-value>
</init-param>
<!--
Are you debugging? Default is false.
-->
<init-param>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>
<!--
Configuration xml location;
* as servlet resource OR
* as classpath resource OR
* as URL
Default is one of hazelcast-default.xml
or hazelcast.xml in classpath.
-->
<init-param>
<param-name>config-location</param-name>
<param-value>/WEB-INF/classes/hazelcast.xml</param-value>
</init-param>
<!--
Do you want to use an existing HazelcastInstance?
Default is null.
-->`enter code here`
<init-param>
<param-name>instance-name</param-name>
<param-value>myapp</param-value>
</init-param>
<!--
Do you want to connect as a client to an existing cluster?
Default is false.
-->
<init-param>
<param-name>use-client</param-name>
<param-value>false</param-value>
</init-param>
<!--
Client configuration location;
* as servlet resource OR
* as classpath resource OR
* as URL
Default is null.
-->
<init-param>
<param-name>client-config-location</param-name>
<param-value>/WEB-INF/classes/hazelcast-client.properties</param-value>
</init-param>
<!--
Do you want to shutdown HazelcastInstance during
web application undeploy process?
Default is true.
-->
<init-param>
<param-name>shutdown-on-destroy</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>hazelcast-filter</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>FORWARD</dispatcher>
<dispatcher>INCLUDE</dispatcher>
<dispatcher>REQUEST</dispatcher>
</filter-mapping>
...
</web-app>
hazelcast.xml (copied from hazelcast.xml inside jar 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">
...
<network>
<port auto-increment="true">5701</port>
<outbound-ports>
<!--
Allowed port range when connecting to other nodes.
0 or * means use system provided port.
-->
<ports>0</ports>
</outbound-ports>
<join>
<multicast enabled="false">
<multicast-group>224.2.2.3</multicast-group>
<multicast-port>54327</multicast-port>
</multicast>
<tcp-ip enabled="false">
<interface>127.0.0.1</interface>
</tcp-ip>
...
</join>
...
</network>
...
</hazelcast>
Spring config....
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:hz="http://www.hazelcast.com/schema/spring"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.hazelcast.com/schema/spring
http://www.hazelcast.com/schema/spring/hazelcast-spring-2.4.xsd">
<bean id="hazelcast" class="com.hazelcast.core.Hazelcast" />
<!-- Hazelcast Instance configuration -->
<hz:hazelcast id="myapp">
<hz:config>
<!-- Hazelcast Instance Name -->
<hz:instance-name>${hz.instance.name}</hz:instance-name>
<!-- Hazelcast Group Name and Password -->
<hz:group name="${hz.group.name}" password="${hz.group.password}" />
<!-- Hazelcast Management Center URL -->
<hz:management-center enabled="${hz.management.center.enabled}" url="${hz.management.center.url}" />
<!-- Hazelcast Tcp based network configuration -->
<hz:network port="${hz.network.port}" port-auto-increment="${hz.network.port.auto.increment}">
<hz:join>
<hz:multicast enabled="${hz.multicast.enabled}" multicast-group="224.2.2.3" multicast-port="54327" />
<hz:tcp-ip enabled="${hz.tcp.ip.enabled}">
<hz:members>${hz.members}</hz:members>
</hz:tcp-ip>
</hz:join>
</hz:network>
<!-- Hazelcast Distributed Map configuration -->
<hz:map name="map" backup-count="${hz.map.backup.count}" max-size="${hz.map.max.size}" eviction-percentage="${hz.map.eviction.percentage}"
read-backup-data="${hz.map.read.backup.data}" eviction-policy="${hz.map.eviction.policy}" merge-policy="${hz.map.merge.policy}" />
</hz:config>
</hz:hazelcast>
Property file....
#-- Hazelcast properties.
hz.instance.name = myapp
hz.group.name = CERT
hz.group.password = cert
hz.management.center.enabled = true
hz.management.center.url = http://127.0.0.1:8080/mancenter
hz.network.port = 5701
hz.network.port.auto.increment = true
hz.multicast.enabled = true
hz.tcp.ip.enabled = false
hz.members = 127.0.0.1
hz.executor.service.core.pool.size = 2
hz.executor.service.max.pool.size = 30
hz.executor.service.keep.alive.seconds = 30
hz.map.backup.count=2
hz.map.max.size=0
hz.map.eviction.percentage=30
hz.map.read.backup.data=true
hz.map.cache.value=true
hz.map.eviction.policy=NONE
hz.map.merge.policy=hz.ADD_NEW_ENTRY
Root Context.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:hz="http://www.hazelcast.com/schema/spring"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/jee
http://www.springframework.org/schema/jee/spring-jee-3.1.xsd
http://www.hazelcast.com/schema/spring
http://www.hazelcast.com/schema/spring/hazelcast-spring-2.4.xsd">
...
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<jee:jndi-lookup jndi-name="java:comp/env/config_file" />
</list>
</property>
</bean>
...
</beans>
Tomcat Config...
<Host appBase="webapps" autoDeploy="true" name="localhost" unpackWARs="true">
...
<Context docBase="myapp" path="/myapp" reloadable="true" source="org.eclipse.jst.j2ee.server:pwc-ws">
<Environment description="" name="config_file" override="false" type="java.lang.String" value="file:c:/path/to/config/myapp.properties" />
</Context>
...
</Host>
Tomcat output (Note: This is a restart scenario of a two node hazelcast group. In this scenario, Node 1 is restarted. The output of Node 2 shows the drop of node 1 from the group and then its return to the group).
Node 1 of Group CERT
Nov 19, 2013 4:27:56 PM com.hazelcast.impl.AddressPicker
INFO: Prefer IPv4 stack is true.
Nov 19, 2013 4:27:56 PM com.hazelcast.impl.AddressPicker
INFO: Picked Address[10.23.43.13]:5701, using socket ServerSocket[addr=/0:0:0:0:0:0:0:0,localport=5701], bind any local is true
Nov 19, 2013 4:27:57 PM com.hazelcast.system
INFO: [10.23.43.13]:5701 [CERT] Hazelcast Community Edition 2.4 (20121017) starting at Address[10.23.43.13]:5701
Nov 19, 2013 4:27:57 PM com.hazelcast.system
INFO: [10.23.43.13]:5701 [CERT] Copyright (C) 2008-2012 Hazelcast.com
Nov 19, 2013 4:27:57 PM com.hazelcast.impl.LifecycleServiceImpl
INFO: [10.23.43.13]:5701 [CERT] Address[10.23.43.13]:5701 is STARTING
Nov 19, 2013 4:27:57 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:27:57 PM com.hazelcast.impl.MulticastJoiner
INFO: [10.23.43.13]:5701 [CERT] Connecting to master node: Address[10.23.43.14]:5701
Nov 19, 2013 4:27:57 PM com.hazelcast.nio.ConnectionManager
INFO: [10.23.43.13]:5701 [CERT] 54106 accepted socket connection from /10.23.43.14:5701
Nov 19, 2013 4:27:57 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:27:57 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:27:58 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:27:58 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:27:59 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:27:59 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:28:00 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:28:00 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:28:01 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:28:01 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:28:02 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:28:02 PM com.hazelcast.impl.Node
INFO: [10.23.43.13]:5701 [CERT] ** setting master address to Address[10.23.43.14]:5701
Nov 19, 2013 4:28:02 PM com.hazelcast.cluster.ClusterManager
INFO: [10.23.43.13]:5701 [CERT]
Members [2] {
Member [10.23.43.14]:5701
Member [10.23.43.13]:5701 this
}
Nov 19, 2013 4:28:04 PM com.hazelcast.impl.LifecycleServiceImpl
INFO: [10.23.43.13]:5701 [CERT] Address[10.23.43.13]:5701 is STARTED
Nov 19, 2013 4:28:04 PM com.hazelcast.impl.management.ManagementCenterService
INFO: [10.23.43.13]:5701 [CERT] Hazelcast will connect to Management Center on address: http://localhost:8080/mancenter/
Nov 19, 2013 4:28:04 PM com.hazelcast.config.UrlXmlConfig
INFO: Configuring Hazelcast from 'jndi:/localhost/pwc-ui/WEB-INF/classes/hazelcast.xml'.
Nov 19, 2013 4:28:04 PM com.hazelcast.web.WebFilter
INFO: sticky:true, debug: true, shutdown-on-destroy: true, map-name: my-sessions
Nov 19, 2013 4:28:05 PM org.apache.catalina.startup.HostConfig deployDescriptor
Node 2 of Group CERT (note the drop and re-add)
Nov 19, 2013 4:27:11 PM com.hazelcast.nio.Connection
INFO: [10.23.43.14]:5701 [CERT] Connection [Address[10.23.43.13]:5701] lost. Reason: java.io.IOException[Connection reset by peer]
Nov 19, 2013 4:27:11 PM com.hazelcast.nio.ReadHandler
WARNING: [10.23.43.14]:5701 [CERT] hz.pwc.IO.thread-1 Closing socket to endpoint Address[10.23.43.13]:5701, Cause:java.io.IOException: Connection reset by peer
Nov 19, 2013 4:27:12 PM com.hazelcast.nio.SocketConnector
INFO: [10.23.43.14]:5701 [CERT] Could not connect to: /10.23.43.13:5701. Reason: ConnectException[Connection refused]
Nov 19, 2013 4:27:13 PM com.hazelcast.nio.SocketConnector
INFO: [10.23.43.14]:5701 [CERT] Could not connect to: /10.23.43.13:5701. Reason: ConnectException[Connection refused]
Nov 19, 2013 4:27:14 PM com.hazelcast.nio.SocketConnector
INFO: [10.23.43.14]:5701 [CERT] Could not connect to: /10.23.43.13:5701. Reason: ConnectException[Connection refused]
Nov 19, 2013 4:27:14 PM com.hazelcast.nio.ConnectionMonitor
WARNING: [10.23.43.14]:5701 [CERT] Removing connection to endpoint Address[10.23.43.13]:5701 Cause => java.net.ConnectException {Connection refused}, Error-Count: 5
Nov 19, 2013 4:27:14 PM com.hazelcast.cluster.ClusterManager
INFO: [10.23.43.14]:5701 [CERT] Removing Address Address[10.23.43.13]:5701
Nov 19, 2013 4:27:14 PM com.hazelcast.impl.PartitionManager
INFO: [10.23.43.14]:5701 [CERT] Starting to send partition replica diffs...true
Nov 19, 2013 4:27:14 PM com.hazelcast.cluster.ClusterManager
INFO: [10.23.43.14]:5701 [CERT]
Members [1] {
Member [10.23.43.14]:5701 this
}
Nov 19, 2013 4:27:18 PM com.hazelcast.impl.PartitionManager
INFO: [10.23.43.14]:5701 [CERT] Total 0 partition replica diffs have been processed.
Nov 19, 2013 4:27:18 PM com.hazelcast.impl.PartitionManager
INFO: [10.23.43.14]:5701 [CERT] Re-partitioning cluster data... Immediate-Tasks: 0, Scheduled-Tasks: 0
Nov 19, 2013 4:27:57 PM com.hazelcast.nio.SocketAcceptor
INFO: [10.23.43.14]:5701 [CERT] 5701 is accepting socket connection from /10.23.43.13:54106
Nov 19, 2013 4:27:57 PM com.hazelcast.nio.ConnectionManager
INFO: [10.23.43.14]:5701 [CERT] 5701 accepted socket connection from /10.23.43.13:54106
Nov 19, 2013 4:27:57 PM com.hazelcast.web.WebFilter
INFO: Created new session with id: HZ650FDF62693F45A99AC0C30BBD8840B0
Nov 19, 2013 4:27:57 PM com.hazelcast.web.WebFilter
INFO: 195 is sessions.size and originalSessions.size: 195
Nov 19, 2013 4:27:57 PM com.hazelcast.web.WebFilter
INFO: PUTTING SESSION HZ650FDF62693F45A99AC0C30BBD8840B0
Nov 19, 2013 4:28:02 PM com.hazelcast.cluster.ClusterManager
INFO: [10.23.43.14]:5701 [CERT]
Members [2] {
Member [10.23.43.14]:5701 this
Member [10.23.43.13]:5701
}
Nov 19, 2013 4:28:02 PM com.hazelcast.impl.PartitionManager
INFO: [10.23.43.14]:5701 [CERT] Re-partitioning cluster data... Immediate-Tasks: 271, Scheduled-Tasks: 0
Nov 19, 2013 4:28:24 PM com.hazelcast.web.WebFilter
INFO: Created new session with id: HZAD50E5F483CC448C9FA7CB66D65848BB
Nov 19, 2013 4:28:24 PM com.hazelcast.web.WebFilter
INFO: 196 is sessions.size and originalSessions.size: 196
Nov 19, 2013 4:28:24 PM com.hazelcast.web.WebFilter
INFO: PUTTING SESSION HZAD50E5F483CC448C9FA7CB66D65848BB
Nov 19, 2013 4:28:24 PM com.hazelcast.web.WebFilter
INFO: Request is instance of RequestWrapper! Continue...
Nov 19, 2013 4:28:24 PM com.hazelcast.web.WebFilter
INFO: Request is instance of RequestWrapper! Continue...
Nov 19, 2013 4:28:24 PM com.hazelcast.web.WebFilter
INFO: Request is instance of RequestWrapper! Continue...
Nov 19, 2013 4:28:24 PM com.hazelcast.web.WebFilter
INFO: Request is instance of RequestWrapper! Continue...
Nov 19, 2013 4:28:50 PM com.hazelcast.web.WebFilter
INFO: Created new session with id: HZC9553A4C330044CA8A0C20549EE23BF0
Nov 19, 2013 4:28:50 PM com.hazelcast.web.WebFilter
INFO: 197 is sessions.size and originalSessions.size: 197
Nov 19, 2013 4:28:50 PM com.hazelcast.web.WebFilter
INFO: PUTTING SESSION HZC9553A4C330044CA8A0C20549EE23BF0
Nov 19, 2013 4:28:50 PM com.hazelcast.web.WebFilter
INFO: Request is instance of RequestWrapper! Continue...
Nov 19, 2013 4:28:50 PM com.hazelcast.web.WebFilter
INFO: Request is instance of RequestWrapper! Continue...
Nov 19, 2013 4:28:50 PM com.hazelcast.web.WebFilter
INFO: Request is instance of RequestWrapper! Continue...
Nov 19, 2013 4:28:50 PM com.hazelcast.web.WebFilter
INFO: Request is instance of RequestWrapper! Continue...
10069.275: [GC [PSYoungGen: 693173K->3458K(695488K)] 877908K->188718K(2093632K), 0.0224650 secs] [Times: user=0.04 sys=0.00, real=0.02 secs]
Nov 19, 2013 4:29:18 PM com.hazelcast.web.WebFilter
INFO: Created new session with id: HZE46365454C2C45F98A7947AC40E404BB
Nov 19, 2013 4:29:18 PM com.hazelcast.web.WebFilter
INFO: 198 is sessions.size and originalSessions.size: 198
Nov 19, 2013 4:29:18 PM com.hazelcast.web.WebFilter
INFO: PUTTING SESSION HZE46365454C2C45F98A7947AC40E404BB

Answer 2

The following only works with Hazelcast 3.2-SNAPSHOT.
Lets start with the single HazelcastInstance that is shared between session replication and the application. You can do it like this:
public class HazelcastInstanceLoader {
private final static ILogger logger = Logger.getLogger(HazelcastInstanceLoader.class);
public static HazelcastInstance load(String instanceName) throws Exception {
String configName = System.getProperty("hazelcast.config");
if (configName == null) {
configName = "hazelcast.xml";
}
Config config;
if (configName.startsWith("file:")) {
String filename = configName.substring("file:".length());
logger.info("Using hazelcast configuration file: " + filename);
config = new FileSystemXmlConfig(filename);
} else {
logger.info("Using hazelcast classpath resource: " + configName);
config = new ClasspathXmlConfig(configName);
}
config.setInstanceName(instanceName);
return Hazelcast.getOrCreateHazelcastInstance(config);
}
}
And now the Spring configuration:
<bean id="hazelcastInstance"
class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="staticMethod" value="com.hazelcast.webmonitor.HazelcastInstanceLoader.load"/>
<property name="arguments">
<list>
<value>default</value>
</list>
</property>
</bean>
So when this is loaded, we have a named HazelcastInstance 'default'.
When I configure the session replication like this:
<filter>
<filter-name>hazelcast-filter</filter-name>
<filter-class>com.hazelcast.web.WebFilter</filter-class>
<init-param>
<param-name>instance-name</param-name>
<param-value>default</param-value>
</init-param>
</filter>
Then the session filter will try to load the hazelcastinstance with that name. Since the 'default' HazelcastInstance already is created because the Spring applicationcontext is loaded, the session filter will use that instance and not create a new one.
If you need to have fully seperate configuration files, just specify a file using the 'hazelcast.conf' system property (see the code of the HazelcastInstanceLoader). Instead of relying on a system property, you could also modify the HazelcastInstanceLoader.load method to accept a 'path' property, which you can inject from Spring.
Setting different groups for different environments is a useful way to make sure that machines in these environments, don't form a group. But if you want to share configuration, and only on the details there are differences (e.g. groupnames), then you can also make use of variables in the xml:
<hazelcast>
<group>
<name>${groupname}</name>
<password>${password}</password>
</group>
...
</hazelcast>
Does this answer your question?

Answer 3

Why dont you jat put in src/main/resources a file per environement.
So that you have: dev.properties,qa.properties,prod.properties
use an environement variable such as ENV. which in my situation i have put ENV=dev
and then inside my spring-servlet.xml i have:
<property name="locations">
<list>
<value>classpath:/${SERVER_ENV}.hazelcast.properties</value>
</list>
</property>
and then in the same file i use properties this way:
<hz:hazelcast id="myapp">
<hz:config>
<!-- Hazelcast Instance Name -->
<hz:instance-name>${hz.instance.name}</hz:instance-name>
<!-- Hazelcast Group Name and Password -->
<hz:group name="${hz.group.name}" password="${hz.group.password}" />
<!-- Hazelcast Management Center URL -->
<hz:management-center enabled="${hz.management.center.enabled}" url="${hz.management.center.url}"
/>
<!-- Hazelcast Tcp based network configuration -->
<hz:network port="${hz.network.port}" port-auto-increment="${hz.network.port.auto.increment}">
<hz:join>
<hz:multicast enabled="${hz.multicast.enabled}" multicast-group="224.2.2.3" multicast-port="54327"
/>
<hz:tcp-ip enabled="${hz.tcp.ip.enabled}">
<hz:members>${hz.members}</hz:members>
</hz:tcp-ip>
</hz:join>
</hz:network>
<!-- Hazelcast Distributed Map configuration -->
<hz:map name="map" backup-count="${hz.map.backup.count}" max-size="${hz.map.max.size}"
eviction-percentage="${hz.map.eviction.percentage}" read-backup-data="${hz.map.read.backup.data}"
eviction-policy="${hz.map.eviction.policy}" merge-policy="${hz.map.merge.policy}"
/>
</hz:config>
</hz:hazelcast>