Java HColumnDescriptor.getScope方法代碼示例

import org.apache.hadoop.hbase.HColumnDescriptor; //導入方法依賴的package包/類
/**
 * Find all column families that are replicated from this cluster
 * @return the full list of the replicated column families of this cluster as:
 *        tableName, family name, replicationType
 *
 * Currently replicationType is Global. In the future, more replication
 * types may be extended here. For example
 *  1) the replication may only apply to selected peers instead of all peers
 *  2) the replicationType may indicate the host Cluster servers as Slave
 *     for the table:columnFam.
 */
public List<HashMap<String, String>> listReplicated() throws IOException {
  List<HashMap<String, String>> replicationColFams = new ArrayList<HashMap<String, String>>();

  Admin admin = connection.getAdmin();
  HTableDescriptor[] tables;
  try {
    tables = admin.listTables();
  } finally {
    if (admin!= null) admin.close();
  }

  for (HTableDescriptor table : tables) {
    HColumnDescriptor[] columns = table.getColumnFamilies();
    String tableName = table.getNameAsString();
    for (HColumnDescriptor column : columns) {
      if (column.getScope() != HConstants.REPLICATION_SCOPE_LOCAL) {
        // At this moment, the columfam is replicated to all peers
        HashMap<String, String> replicationEntry = new HashMap<String, String>();
        replicationEntry.put(TNAME, tableName);
        replicationEntry.put(CFNAME, column.getNameAsString());
        replicationEntry.put(REPLICATIONTYPE, REPLICATIONGLOBAL);
        replicationColFams.add(replicationEntry);
      }
    }
  }

  return replicationColFams;
}
 

import org.apache.hadoop.hbase.HColumnDescriptor; //導入方法依賴的package包/類
/**
 * @param htd table descriptor details for the table to check
 * @return true if table's replication switch is enabled
 */
private boolean isTableRepEnabled(HTableDescriptor htd) {
  for (HColumnDescriptor hcd : htd.getFamilies()) {
    if (hcd.getScope() != HConstants.REPLICATION_SCOPE_GLOBAL) {
      return false;
    }
  }
  return true;
}