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

Hi Kyle,

You might want to take a look at HTable.getTableDescriptor().getValues().

In the HTableDescriptor class, you have hasCoprocessor(className).
This method is looping over the values and is comparing the entries
with the CP_HTD_ATTR_KEY_PATTERN constant to figure if it's a
coprocessor or not. Simply do something similar in your code and you
might be able to get the list of coprocessors.

Also, I think this method should already be there in the
HTableInterface... Can you please open a JIRA and request for it?

Thanks,

JM

2013/1/23, Kyle Lin <[EMAIL PROTECTED]>:
> 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
>

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

Hello JM

It really works! Thanks a lot.

Hello Jack

    For each table, it needs to use htable.getTableDescriptor().

    hbaseAdmin.getTableDescriptor only gets -ROOT- and .META.

    So I use the code as follows,

HTable htable = new HTable(config, tableName);
HTableDescriptor htableDesc = *htable.getTableDescriptor()*;
Map<ImmutableBytesWritable, ImmutableBytesWritable> maps htableDesc.getValues();
Set<Entry<ImmutableBytesWritable, ImmutableBytesWritable>> sets maps.entrySet();
for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable> entrySet :
sets) {
String stringKey = Bytes.toString(entrySet.getKey().get());
String stringValue = Bytes.toString(entrySet.getValue().get());
System.out.println("key:" + stringKey + ", value:" + stringValue);
}
htable.close();

Kyle

2013/1/24 jack <[EMAIL PROTECTED]>

> 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
>

Hi Kyle,

This will give you all the attributs of the table, not just the
coprocessors, so don't forget to parse they key using
CP_HTD_ATTR_KEY_PATTERN ...

I will add in my ToDo to add a List<> getCoprocessors() method in
HTableInterface or HTableDescriptor...

JM

2013/1/23, Kyle Lin <[EMAIL PROTECTED]>:
> Hello JM
>
> It really works! Thanks a lot.
>
> Hello Jack
>
>     For each table, it needs to use htable.getTableDescriptor().
>
>     hbaseAdmin.getTableDescriptor only gets -ROOT- and .META.
>
>     So I use the code as follows,
>
> HTable htable = new HTable(config, tableName);
> HTableDescriptor htableDesc = *htable.getTableDescriptor()*;
> Map<ImmutableBytesWritable, ImmutableBytesWritable> maps > htableDesc.getValues();
> Set<Entry<ImmutableBytesWritable, ImmutableBytesWritable>> sets > maps.entrySet();
> for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable> entrySet :
> sets) {
> String stringKey = Bytes.toString(entrySet.getKey().get());
> String stringValue = Bytes.toString(entrySet.getValue().get());
> System.out.println("key:" + stringKey + ", value:" + stringValue);
> }
> htable.close();
>
> Kyle
>
> 2013/1/24 jack <[EMAIL PROTECTED]>
>
>> 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
>>
>

Hi JM

     I saw the source code of hasCoprocessor, and notice this CONTANT.
Thanks for your hint.

Kyle

2013/1/24 Jean-Marc Spaggiari <[EMAIL PROTECTED]>

> Hi Kyle,
>
> This will give you all the attributs of the table, not just the
> coprocessors, so don't forget to parse they key using
> CP_HTD_ATTR_KEY_PATTERN ...
>
> I will add in my ToDo to add a List<> getCoprocessors() method in
> HTableInterface or HTableDescriptor...
>
> JM
>
> 2013/1/23, Kyle Lin <[EMAIL PROTECTED]>:
> > Hello JM
> >
> > It really works! Thanks a lot.
> >
> > Hello Jack
> >
> >     For each table, it needs to use htable.getTableDescriptor().
> >
> >     hbaseAdmin.getTableDescriptor only gets -ROOT- and .META.
> >
> >     So I use the code as follows,
> >
> > HTable htable = new HTable(config, tableName);
> > HTableDescriptor htableDesc = *htable.getTableDescriptor()*;
> > Map<ImmutableBytesWritable, ImmutableBytesWritable> maps > > htableDesc.getValues();
> > Set<Entry<ImmutableBytesWritable, ImmutableBytesWritable>> sets > > maps.entrySet();
> > for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable> entrySet :
> > sets) {
> > String stringKey = Bytes.toString(entrySet.getKey().get());
> > String stringValue = Bytes.toString(entrySet.getValue().get());
> > System.out.println("key:" + stringKey + ", value:" + stringValue);
> > }
> > htable.close();
> >
> > Kyle
> >
> > 2013/1/24 jack <[EMAIL PROTECTED]>
> >
> >> 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
>

Hi Kyle,

If you are not running a production cluster, you might think about
getting the last 0.94.4 source code, apply HBASE-7654 and deploy it.
That way you can use getCoprocessors which will send you the list you
the list you are looking for...

JM

2013/1/28, Kyle Lin <[EMAIL PROTECTED]>:
> Hi JM
>
>      I saw the source code of hasCoprocessor, and notice this CONTANT.
> Thanks for your hint.
>
> Kyle
>
> 2013/1/24 Jean-Marc Spaggiari <[EMAIL PROTECTED]>
>
>> Hi Kyle,
>>
>> This will give you all the attributs of the table, not just the
>> coprocessors, so don't forget to parse they key using
>> CP_HTD_ATTR_KEY_PATTERN ...
>>
>> I will add in my ToDo to add a List<> getCoprocessors() method in
>> HTableInterface or HTableDescriptor...
>>
>> JM
>>
>> 2013/1/23, Kyle Lin <[EMAIL PROTECTED]>:
>> > Hello JM
>> >
>> > It really works! Thanks a lot.
>> >
>> > Hello Jack
>> >
>> >     For each table, it needs to use htable.getTableDescriptor().
>> >
>> >     hbaseAdmin.getTableDescriptor only gets -ROOT- and .META.
>> >
>> >     So I use the code as follows,
>> >
>> > HTable htable = new HTable(config, tableName);
>> > HTableDescriptor htableDesc = *htable.getTableDescriptor()*;
>> > Map<ImmutableBytesWritable, ImmutableBytesWritable> maps >> > htableDesc.getValues();
>> > Set<Entry<ImmutableBytesWritable, ImmutableBytesWritable>> sets >> > maps.entrySet();
>> > for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable> entrySet
>> > :
>> > sets) {
>> > String stringKey = Bytes.toString(entrySet.getKey().get());
>> > String stringValue = Bytes.toString(entrySet.getValue().get());
>> > System.out.println("key:" + stringKey + ", value:" + stringValue);
>> > }
>> > htable.close();
>> >
>> > Kyle
>> >
>> > 2013/1/24 jack <[EMAIL PROTECTED]>
>> >
>> >> 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

Hello JM

    If I import 0.94.4 jar file on Client side for calling getCoprocessors
to get list from server of old version(0.94.0), Is it possible?

Kyle

2013/1/28 Jean-Marc Spaggiari <[EMAIL PROTECTED]>

> Hi Kyle,
>
> If you are not running a production cluster, you might think about
> getting the last 0.94.4 source code, apply HBASE-7654 and deploy it.
> That way you can use getCoprocessors which will send you the list you
> the list you are looking for...
>
> JM
>
> 2013/1/28, Kyle Lin <[EMAIL PROTECTED]>:
> > Hi JM
> >
> >      I saw the source code of hasCoprocessor, and notice this CONTANT.
> > Thanks for your hint.
> >
> > Kyle
> >
> > 2013/1/24 Jean-Marc Spaggiari <[EMAIL PROTECTED]>
> >
> >> Hi Kyle,
> >>
> >> This will give you all the attributs of the table, not just the
> >> coprocessors, so don't forget to parse they key using
> >> CP_HTD_ATTR_KEY_PATTERN ...
> >>
> >> I will add in my ToDo to add a List<> getCoprocessors() method in
> >> HTableInterface or HTableDescriptor...
> >>
> >> JM
> >>
> >> 2013/1/23, Kyle Lin <[EMAIL PROTECTED]>:
> >> > Hello JM
> >> >
> >> > It really works! Thanks a lot.
> >> >
> >> > Hello Jack
> >> >
> >> >     For each table, it needs to use htable.getTableDescriptor().
> >> >
> >> >     hbaseAdmin.getTableDescriptor only gets -ROOT- and .META.
> >> >
> >> >     So I use the code as follows,
> >> >
> >> > HTable htable = new HTable(config, tableName);
> >> > HTableDescriptor htableDesc = *htable.getTableDescriptor()*;
> >> > Map<ImmutableBytesWritable, ImmutableBytesWritable> maps > >> > htableDesc.getValues();
> >> > Set<Entry<ImmutableBytesWritable, ImmutableBytesWritable>> sets > >> > maps.entrySet();
> >> > for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable>
> entrySet
> >> > :
> >> > sets) {
> >> > String stringKey = Bytes.toString(entrySet.getKey().get());
> >> > String stringValue = Bytes.toString(entrySet.getValue().get());
> >> > System.out.println("key:" + stringKey + ", value:" + stringValue);
> >> > }
> >> > htable.close();
> >> >
> >> > Kyle
> >> >
> >> > 2013/1/24 jack <[EMAIL PROTECTED]>
> >> >
> >> >> 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

Hi Kyle,

I this it's possible. I have already done that between 0.94.1 and 0.94.3.

JM

2013/1/29, Kyle Lin <[EMAIL PROTECTED]>:
> Hello JM
>
>     If I import 0.94.4 jar file on Client side for calling getCoprocessors
> to get list from server of old version(0.94.0), Is it possible?
>
> Kyle
>
> 2013/1/28 Jean-Marc Spaggiari <[EMAIL PROTECTED]>
>
>> Hi Kyle,
>>
>> If you are not running a production cluster, you might think about
>> getting the last 0.94.4 source code, apply HBASE-7654 and deploy it.
>> That way you can use getCoprocessors which will send you the list you
>> the list you are looking for...
>>
>> JM
>>
>> 2013/1/28, Kyle Lin <[EMAIL PROTECTED]>:
>> > Hi JM
>> >
>> >      I saw the source code of hasCoprocessor, and notice this CONTANT.
>> > Thanks for your hint.
>> >
>> > Kyle
>> >
>> > 2013/1/24 Jean-Marc Spaggiari <[EMAIL PROTECTED]>
>> >
>> >> Hi Kyle,
>> >>
>> >> This will give you all the attributs of the table, not just the
>> >> coprocessors, so don't forget to parse they key using
>> >> CP_HTD_ATTR_KEY_PATTERN ...
>> >>
>> >> I will add in my ToDo to add a List<> getCoprocessors() method in
>> >> HTableInterface or HTableDescriptor...
>> >>
>> >> JM
>> >>
>> >> 2013/1/23, Kyle Lin <[EMAIL PROTECTED]>:
>> >> > Hello JM
>> >> >
>> >> > It really works! Thanks a lot.
>> >> >
>> >> > Hello Jack
>> >> >
>> >> >     For each table, it needs to use htable.getTableDescriptor().
>> >> >
>> >> >     hbaseAdmin.getTableDescriptor only gets -ROOT- and .META.
>> >> >
>> >> >     So I use the code as follows,
>> >> >
>> >> > HTable htable = new HTable(config, tableName);
>> >> > HTableDescriptor htableDesc = *htable.getTableDescriptor()*;
>> >> > Map<ImmutableBytesWritable, ImmutableBytesWritable> maps >> >> > htableDesc.getValues();
>> >> > Set<Entry<ImmutableBytesWritable, ImmutableBytesWritable>> sets >> >> > maps.entrySet();
>> >> > for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable>
>> entrySet
>> >> > :
>> >> > sets) {
>> >> > String stringKey = Bytes.toString(entrySet.getKey().get());
>> >> > String stringValue = Bytes.toString(entrySet.getValue().get());
>> >> > System.out.println("key:" + stringKey + ", value:" + stringValue);
>> >> > }
>> >> > htable.close();
>> >> >
>> >> > Kyle
>> >> >
>> >> > 2013/1/24 jack <[EMAIL PROTECTED]>
>> >> >
>> >> >> 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]>