Changes between Initial Version and Version 1 of waue/2011/0426_4_5

Timestamp:

Apr 25, 2011, 3:55:30 PM (13 years ago)

Author:

waue

Comment:

--

waue/2011/0426_4_5

@@ +1 @@
+{{{
+#!html
+<div style="text-align: center; color:#151B8D"><big style="font-weight: bold;"><big><big>
+ITRI HBase 進階課程 
+</big></big></big></div> <div style="text-align: center; color:#7E2217"><big style="font-weight: bold;"><big>
+HBase 範例
+</big></big></div>
+}}}
+
+[wiki:waue/2011/0426_4_4 上一關 < ] 第五關 [wiki:waue/2011/0426_4_6 > 下一關]
+
+= 範例五： 刪除資料表 =
+
+{{{
+$ bin/hadoop jar ItriMenu.jar DropTable "ex1Table"
+}}}
+
+{{{
+#!java
+
+package itri;
+
+import java.io.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.HBaseConfiguration;
+import org.apache.hadoop.hbase.client.HBaseAdmin;
+import org.apache.hadoop.util.GenericOptionsParser;
+
+public class DropTable {
+
+        static void drop(String tablename) {
+                HBaseConfiguration conf = new HBaseConfiguration();
+
+                HBaseAdmin admin;
+                try {
+                        admin = new HBaseAdmin(conf);
+                        if (admin.tableExists(tablename)) {
+                                admin.disableTable(tablename);
+                                admin.deleteTable(tablename);
+                                System.out.println("Droped the table [" + tablename + "]");
+                        } else {
+                                System.out.println("Table [" + tablename + "] was not found!");
+                        }
+
+                } catch (IOException e) {
+                        e.printStackTrace();
+                }
+        }
+
+        public static void main(String[] argv) {
+//              String[] argc = {"t1"};argv = argc;
+                String[] otherArgs = new GenericOptionsParser(new Configuration(), argv)
+                                .getRemainingArgs();
+                if (otherArgs.length < 1) {
+                        System.out.println("DropTable <TableName> ");
+                        return;
+                }
+                
+                drop(otherArgs[0]);
+        }
+}
+
+}}}
+
+ * 執行結果
+
+{{{
+Droped the table [ex1Table]
+}}}