Changes between Version 3 and Version 4 of NCHCCloudCourse100929_4_HBEX

Timestamp:

Sep 28, 2010, 6:18:12 PM (15 years ago)

Author:

waue

Comment:

--

NCHCCloudCourse100929_4_HBEX

@@ -16 +16 @@
 = !CreateTable.java =
 {{{
-#!text
+#!java
 package org.nchc.hbase;
 
@@ -31 +31 @@
         public static void createHBaseTable(String tablename, String family)
                         throws IOException {
-                // HTableDescriptor contains the name of an HTable, and its column
-                // families
                 // HTableDescriptor 用來描述table的屬性
                 HTableDescriptor htd = new HTableDescriptor(tablename);
-                // HColumnDescriptor HColumnDescriptor contains information about a
-                // column family such as the number of versions, compression settings,
-                // etc.
+
                 // HTableDescriptor 透過 add() 方法來加入Column family
-
                 htd.addFamily(new HColumnDescriptor(family));
 
                 // HBaseConfiguration 能接收 hbase-site.xml 的設定值
                 HBaseConfiguration config = new HBaseConfiguration();
+
                 // 檔案的操作則使用 HBaseAdmin
                 HBaseAdmin admin = new HBaseAdmin(config);
+
                 // 檢查
                 if (admin.tableExists(tablename)) {
@@ -51 +48 @@
                 } else {
                         System.out.println("create new table: " + tablename);
+
                         // 建立
                         admin.createTable(htd);