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From "sishen.freecity (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-764) The name of column request has padding zero using REST interface
Date Wed, 23 Jul 2008 06:14:31 GMT
The name of column request has padding zero using REST interface
----------------------------------------------------------------

                 Key: HBASE-764
                 URL: https://issues.apache.org/jira/browse/HBASE-764
             Project: Hadoop HBase
          Issue Type: Bug
          Components: rest
    Affects Versions: 0.2.0
         Environment: Debian GNU/Linux,  Java5
            Reporter: sishen.freecity


Today when i play with the REST interface and found the column POST/PUT/GET has a problem.
When i use the hbase shell to check the data, i found the row name has the padding zero.

The cause is that TableHandler use Text class to encode the string to the UTF-8. But CharSetEncoder
will pre-allocate more spaces then the length of String for performance. So we get the padding
zero
when inserting the value to the table.  The fix is to get the String instead of the byte[]
for the BatchUpdate.

Below is the patch.  Also, the patch includes fixing the wrong use of (bytes[]).toString()
using Bytes.toString(byte[])


Index: src/java/org/apache/hadoop/hbase/rest/TableHandler.java
===================================================================
--- src/java/org/apache/hadoop/hbase/rest/TableHandler.java    (revision 678664)
+++ src/java/org/apache/hadoop/hbase/rest/TableHandler.java    (working copy)
@@ -174,7 +174,7 @@
 
         // copy over those cells with requested column names
         for(byte [] current_column: columns_retrieved) {
-          if(requested_columns_set.contains(current_column.toString())){
+          if(requested_columns_set.contains(Bytes.toString(current_column))){
             m.put(current_column, prefiltered_result.get(current_column));           
           }
         }
@@ -295,7 +295,7 @@
    
     try{
       // start an update
-      Text key = new Text(row);
+      String key = new Text(row).toString();
       batchUpdate = timestamp == null ?
         new BatchUpdate(key) : new BatchUpdate(key, Long.parseLong(timestamp));
 
@@ -308,7 +308,7 @@
 
         // extract the name and value children
         Node name_node = column.getElementsByTagName("name").item(0);
-        Text name = new Text(name_node.getFirstChild().getNodeValue());
+        String name = new Text(name_node.getFirstChild().getNodeValue()).toString();
 
         Node value_node = column.getElementsByTagName("value").item(0);
 
@@ -356,7 +356,7 @@
           XMLOutputter outputter = getXMLOutputter(response.getWriter());
           outputter.startTag("regions");
           for (int i = 0; i < startKeys.length; i++) {
-            doElement(outputter, "region", startKeys[i].toString());
+            doElement(outputter, "region", Bytes.toString(startKeys[i]));
           }
           outputter.endTag();
           outputter.endDocument();
@@ -368,7 +368,7 @@
           PrintWriter out = response.getWriter();
           for (int i = 0; i < startKeys.length; i++) {
             // TODO: Add in the server location.  Is it needed?
-            out.print(startKeys[i].toString());
+            out.print(Bytes.toString(startKeys[i]));
           }
           out.close();
         break;
@@ -454,7 +454,7 @@
     // pull the row key out of the path
     String row = URLDecoder.decode(pathSegments[2], HConstants.UTF8_ENCODING);
    
-    Text key = new Text(row);
+    String key = new Text(row).toString();
 
     String[] columns = request.getParameterValues(COLUMN);
        
@@ -472,7 +472,7 @@
       } else{
         // delete each column in turn     
         for(int i = 0; i < columns.length; i++){
-          table.deleteAll(key, new Text(columns[i]));
+          table.deleteAll(key, new Text(columns[i]).toString());
         }
       }
       response.setStatus(202);

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