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From Aaron Morton <aa...@thelastpickle.com>
Subject Re: Query about class org.apache.cassandra.io.sstable.SSTableSimpleWriter
Date Mon, 30 Sep 2013 07:01:43 GMT
> Thanks for the reply. Isn't the addColumn(IColumn col) method in the writer private though?
> 
> 

Yes but I thought you had it in your examples, was included for completeness. use the official
overloads. 

Cheers

-----------------
Aaron Morton
New Zealand
@aaronmorton

Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com

On 27/09/2013, at 4:12 PM, Jayadev Jayaraman <jdisalive@gmail.com> wrote:

> Thanks for the reply. Isn't the addColumn(IColumn col) method in the writer private though?
I know what to do now in order to construct a column with a TTL now. Thanks.
> 
> On Sep 26, 2013 9:00 PM, "Aaron Morton" <aaron@thelastpickle.com> wrote:
> > org.apache.cassandra.thrift.Column column; // initialize this with name, value,
timestamp, TTL
> This is the wrong object to use.
> 
> one overload of addColumn() accepts IColumn which is from org.apache.cassanda.db . The
thrift classes are only use for the thrift API.
> 
> > What is the difference between calling writer.addColumn() on the column's name,
value and timestamp, and writer.addExpiringColumn() on the column's name, value, TTL, timestamp
and expiration timestamp ?
> They both add an column to the row. addExpiringColumn() adds an expiring column, and
addColumn adds a normal one.
> 
> only addExpiringColumn accepts a TTL (in seconds) for the column.
> 
> 
> > Does the former result in the column expiring still , in cassandra 1.2.x (i.e. does
setting the TTL on a Column object change the name or value in a way so as to ensure the column
will expire as required) ?
> No.
> An expiring column must be an ExpiringColumn column instance.
> The base IColumn interface does not have a TTL, only expiring columns do.
> 
> >  If not , what is the TTL attribute used for in the Column object ?
> The org.apache.cassandra.db.Column class does not have a TTL.
> 
> Cheers
> 
> 
> -----------------
> Aaron Morton
> New Zealand
> @aaronmorton
> 
> Co-Founder & Principal Consultant
> Apache Cassandra Consulting
> http://www.thelastpickle.com
> 
> On 26/09/2013, at 12:44 AM, Jayadev Jayaraman <jdisalive@gmail.com> wrote:
> 
> > Can someone answer this doubt reg. SSTableSimpleWriter ? I'd asked about this earlier
but it probably missed. Apologies for repeating the question (with minor additions)  :
> >
> > """
> > Let's say I've initialized a SSTableSimpleWriter instance and a new column with
TTL set :
> >
> > org.apache.cassandra.io.sstable.SSTableSimpleWriter writer = new SSTableSimpleWriter(
... /* params here */);
> > org.apache.cassandra.thrift.Column column; // initialize this with name, value,
timestamp, TTL
> >
> > What is the difference between calling writer.addColumn() on the column's name,
value and timestamp, and writer.addExpiringColumn() on the column's name, value, TTL, timestamp
and expiration timestamp ? Does the former result in the column expiring still , in cassandra
1.2.x (i.e. does setting the TTL on a Column object change the name or value in a way so as
to ensure the column will expire as required) ? If not , what is the TTL attribute used for
in the Column object ?
> > """
> >
> > Thanks,
> > Jayadev
> >
> >
> > On Tue, Sep 24, 2013 at 2:48 PM, Jayadev Jayaraman <jdisalive@gmail.com> wrote:
> > Let's say I've initialized a SSTableSimpleWriter instance and a new column with
TTL set :
> >
> > SSTableSimpleWriter writer = new SSTableSimpleWriter( ... /* params here */);
> > Column column;
> >
> > What is the difference between calling writer.addColumn() on the column's name and
value, and writer.addExpiringColumn() on the column and its TTL ? Does the former result in
the column expiring still , in cassandra 1.2.x ? Or does it not ?
> >
> >
> >
> 


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