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HBase >> mail # user >> How to get coprocessor list by client API


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Kyle Lin 2013-01-23, 08:18
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RE: How to get coprocessor list by client API
Hi, Kyle

        Configuration config = HBaseConfiguration.create();
        config.set("hbase.zookeeper.quorum", "host3");
        config.set("hbase.zookeeper.property.clientPort", "2181");
   
        config.set("fs.default.name", "hdfs://host3:9000");
        config.set("mapred.job.tracker", "hdfs://host3:9001");
       
        HBaseAdmin hbaseAdmin = new HBaseAdmin(config);
       
        HTableDescriptor htableDescriptor = hbaseAdmin.getTableDescriptor(Bytes.toBytes("table21"));

        Map<ImmutableBytesWritable, ImmutableBytesWritable> maps = htableDescriptor.getValues();
        Set<Entry<ImmutableBytesWritable, ImmutableBytesWritable>> sets = maps.entrySet();
        Iterator<Entry<ImmutableBytesWritable, ImmutableBytesWritable>> it = sets.iterator();
        while(it.hasNext()){
                Entry<ImmutableBytesWritable, ImmutableBytesWritable>  keys = it.next();
                ImmutableBytesWritable ibwKey = keys.getKey();
                ImmutableBytesWritable ibwValue = keys.getValue();
                String stringKey = Bytes.toString(ibwKey.get());
                String stringValue = Bytes.toString(ibwValue.get());
                System.out.println(stringKey + "    " + stringValue);
        }
        hbaseAdmin.close();
________________________________
 寄件者: Kyle Lin <[EMAIL PROTECTED]>
收件者: [EMAIL PROTECTED]
寄件日期: 2013/1/23 (週三) 4:18 PM
主旨: How to get coprocessor list by client API
 
Hi, Everyone

    I need to know What coprocessors registered in a HTable. But, in Class
HTableDescriptor, I can only find
*addCoprocessor<http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/HTableDescriptor.html#addCoprocessor(java.lang.String)>
*, *hasCoprocessor<http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/HTableDescriptor.html#hasCoprocessor(java.lang.String)>
* ..etc. How can I use Client API to get the coprocessor information just
like Typing "describe table_name" in HBase Shell as follows?
hbase(main):002:0> describe 'table21'
DESCRIPTION
                  ENABLED
{NAME => 'table21', *coprocessor$1 =>
'hdfs://host3:9000/sumCoprocessor.jar|idv.jack.endpoint true
                               *
* .SumDataEndpoint||'*, FAMILIES => [{NAME => 'cf', DATA_BLOCK_ENCODING =>
'NONE', BLOOMFILTER
=> 'NONE', REPLICATION_SCOPE => '0', VERSIONS => '3', COMPRESSION =>
'NONE', MIN_VERSIONS =>
  '0', TTL => '2147483647', KEEP_DELETED_CELLS => 'false', BLOCKSIZE =>
'65536', IN_MEMORY =>
  'false', ENCODE_ON_DISK => 'true', BLOCKCACHE => 'true'}]}

1 row(s) in 0.0210 seconds

Kyle
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Kyle Lin 2013-01-24, 03:53
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Jean-Marc Spaggiari 2013-01-24, 12:12
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Kyle Lin 2013-01-28, 09:05
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Jean-Marc Spaggiari 2013-01-28, 12:32
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Kyle Lin 2013-01-29, 06:39
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Jean-Marc Spaggiari 2013-01-29, 20:25
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Jean-Marc Spaggiari 2013-01-23, 12:39