block5.xml

<subsystem xmlns="urn:jboss:domain:jgroups:5.0">
    <!-- this is the cluster's name, nodes use it to discriminate between potentially several clusters -->
    <channels default="jboss-cluster-ee">
        <channel name="jboss-cluster-ee" stack="tcp"/>
    </channels>

    <!-- this is teh specification of the use JGroups protocol stack -->
    <stacks>
        <!-- we use tcp and not udp -->
        <stack name="tcp">
            <transport type="TCP" socket-binding="jgroups-tcp">
                <!-- note that we need the jgroups discovery to publish the host IP and not use its name (because it would be the pod name and not the instance name !) -->
                <property name="external_addr">${env.HOST_IP}</property>
                <property name="use_ip_addrs">true</property>
            </transport>
            <!-- that's where we specify to use JDBC_PING as the discovery mechanism -->
            <protocol type="org.jgroups.protocols.JDBC_PING">
                <!-- This is the datasource we configured previously -->
                <property name="datasource_jndi_name">java:jboss/datasources/ClusteringDS</property>

                <!-- And here are the configured SQL statements working on Postgres, you can translate them for the database you want ! -->
                <property name="initialize_sql">
                    CREATE TABLE IF NOT EXISTS JGROUPSPING (
                        own_addr varchar(200) NOT NULL,
                        bind_addr varchar(200) NOT NULL,
                        created timestamp NOT NULL,
                        cluster_name varchar(200) NOT NULL,
                        ping_data BYTEA,
                        constraint PK_JGROUPSPING PRIMARY KEY (own_addr, cluster_name)
                    )
                </property>
                <property name="insert_single_sql">
                    INSERT INTO JGROUPSPING (own_addr, bind_addr, created, cluster_name, ping_data) values (?,'${env.HOST_IP}',NOW(), ?, ?)
                </property>
                <property name="delete_single_sql">
                    DELETE FROM JGROUPSPING WHERE own_addr=? AND cluster_name=?
                </property>
                <property name="select_all_pingdata_sql">
                    SELECT ping_data FROM JGROUPSPING WHERE cluster_name=?
                </property>
            </protocol>
            <protocol type="MERGE3"/>
            <protocol type="FD_SOCK"/>
            <protocol type="FD_ALL"/>
            <protocol type="VERIFY_SUSPECT"/>
            <protocol type="pbcast.NAKACK2"/>
            <protocol type="UNICAST3"/>
            <protocol type="pbcast.STABLE"/>
            <protocol type="pbcast.GMS">
                <property name="print_physical_addrs">true</property>
                <property name="print_local_addr">true</property>
            </protocol>
            <protocol type="MFC"/>
            <protocol type="FRAG2"/>
        </stack>
    </stacks>
</subsystem>