Examples with ClusterSchema org.apache.hadoop.hbase.master.ClusterSchema used on opensource projects

Example 1 with ClusterSchema

use of org.apache.hadoop.hbase.master.ClusterSchema in project hbase by apache.

the class RSGroupUtil method getRSGroupInfo.

/**
 * Will try to get the rsgroup from {@link TableDescriptor} first, and then try to get the rsgroup
 * from the {@link NamespaceDescriptor}. If still not present, return empty.
 */
public static Optional<RSGroupInfo> getRSGroupInfo(MasterServices master, RSGroupInfoManager manager, TableName tableName) throws IOException {
    TableDescriptor td = master.getTableDescriptors().get(tableName);
    if (td == null) {
        return Optional.empty();
    }
    // RSGroup information determined by client.
    Optional<String> optGroupNameOfTable = td.getRegionServerGroup();
    if (optGroupNameOfTable.isPresent()) {
        RSGroupInfo group = manager.getRSGroup(optGroupNameOfTable.get());
        if (group != null) {
            return Optional.of(group);
        }
    }
    // for backward compatible, where we may still have table configs in the RSGroupInfo after
    // upgrading when migrating is still on-going.
    RSGroupInfo groupFromOldRSGroupInfo = manager.getRSGroupForTable(tableName);
    if (groupFromOldRSGroupInfo != null) {
        return Optional.of(groupFromOldRSGroupInfo);
    }
    // RSGroup information determined by administrator.
    String groupDeterminedByAdmin = manager.determineRSGroupInfoForTable(tableName);
    RSGroupInfo groupInfo = null;
    if (groupDeterminedByAdmin != null) {
        groupInfo = manager.getRSGroup(groupDeterminedByAdmin);
    }
    if (groupInfo != null) {
        return Optional.of(groupInfo);
    }
    // Finally, we will try to fall back to namespace as rsgroup if exists
    ClusterSchema clusterSchema = master.getClusterSchema();
    if (clusterSchema == null) {
        if (TableName.isMetaTableName(tableName)) {
            LOG.info("Can not get the namespace rs group config for meta table, since the" + " meta table is not online yet, will use default group to assign meta first");
        } else {
            LOG.warn("ClusterSchema is null, can only use default rsgroup, should not happen?");
        }
        return Optional.empty();
    }
    NamespaceDescriptor nd = clusterSchema.getNamespace(tableName.getNamespaceAsString());
    String groupNameOfNs = nd.getConfigurationValue(RSGroupInfo.NAMESPACE_DESC_PROP_GROUP);
    if (groupNameOfNs == null) {
        return Optional.empty();
    }
    return Optional.ofNullable(manager.getRSGroup(groupNameOfNs));
}