/**
* Get the membership scheme applicable to this cluster
*
* @param clusterConfiguration the ClusterConfiguration instance
* @return The membership scheme. Only wka and multicast are valid return values
* @throws org.wso2.carbon.clustering.exception.ClusterConfigurationException If the
* membershipScheme specified in the cluster.xml file is invalid
*/
public static String getMembershipScheme(ClusterConfiguration clusterConfiguration)
throws ClusterConfigurationException {
String mbrScheme = null;
Object membershipScheme =
clusterConfiguration.getMembershipSchemeConfiguration().getMembershipScheme();
if (membershipScheme != null) {
String membershipSchemeParam = membershipScheme.toString();
mbrScheme = ClusteringConstants.MembershipScheme.MULTICAST_BASED;
if (membershipSchemeParam != null) {
mbrScheme = membershipSchemeParam.trim();
}
if (!mbrScheme.equals(ClusteringConstants.MembershipScheme.MULTICAST_BASED)
&& !mbrScheme.equals(ClusteringConstants.MembershipScheme.WKA_BASED)) {
String msg =
"Invalid membership scheme '"
+ mbrScheme
+ "'. Supported schemes are "
+ ClusteringConstants.MembershipScheme.MULTICAST_BASED
+ ", "
+ ClusteringConstants.MembershipScheme.WKA_BASED;
logger.error(msg);
throw new ClusterConfigurationException(msg);
}
}
return mbrScheme;
}
/**
* Returns the well known members defined in the cluster.xml
*
* @param clusterConfiguration the clusterConfiguration instance
* @return List of well known members
*/
public static List<ClusterMember> getWellKnownMembers(ClusterConfiguration clusterConfiguration) {
List<ClusterMember> members = new ArrayList<>();
List<WKAMember> wkaMembers =
((WKASchemeConfig)
clusterConfiguration.getMembershipSchemeConfiguration().getMembershipScheme())
.getWkaMembers();
for (WKAMember wkaMember : wkaMembers) {
String hostName = wkaMember.getHost();
int port = wkaMember.getPort();
if (hostName != null && port != 0) {
members.add(new ClusterMember(replaceVariables(hostName), port));
}
}
return members;
}