The output value in the map function is in most examples for hadoop
something like this:
public static class Map extends MapperLongWritable, Text, outputKey,
outputValue
Normally outputValue is something like Text or IntWriteable.
I got a custom class with its own properties like
public class
Hi Paul,
To do this, you need to make your Dog class implement Hadoop's Writable
interface, so that it can be serialized to and deserialized from bytes.
http://hadoop.apache.org/docs/r1.1.1/api/org/apache/hadoop/io/Writable.html
The methods you implement would look something like this:
public
Great! Thank you.
I guess the order for writing and reading the data this way is
important. I mean, for
out.writeUTF(blabla)
out.writeInt(12)
the following would be correct
text = in.readUTF();
number = in.readInt();
and this would fail:
number = in.readInt();
text = in.readUTF();
?
That's right, the date needs to be written and read in the same order.
On Wed, Feb 27, 2013 at 11:04 AM, Paul van Hoven
paul.van.ho...@googlemail.com wrote:
Great! Thank you.
I guess the order for writing and reading the data this way is
important. I mean, for
out.writeUTF(blabla)
