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
