/// <summary>Configures all the chain elements for the task.</summary>
/// <param name="jobConf">chain job's JobConf.</param>
public virtual void Configure(JobConf jobConf)
{
string prefix = GetPrefix(isMap);
chainJobConf = jobConf;
SerializationFactory serializationFactory = new SerializationFactory(chainJobConf
);
int index = jobConf.GetInt(prefix + ChainMapperSize, 0);
for (int i = 0; i < index; i++)
{
Type klass = jobConf.GetClass <Mapper>(prefix + ChainMapperClass + i, null);
JobConf mConf = new JobConf(GetChainElementConf(jobConf, prefix + ChainMapperConfig
+ i));
Mapper mapper = ReflectionUtils.NewInstance(klass, mConf);
mappers.AddItem(mapper);
if (mConf.GetBoolean(MapperByValue, true))
{
mappersKeySerialization.AddItem(serializationFactory.GetSerialization(mConf.GetClass
(MapperOutputKeyClass, null)));
mappersValueSerialization.AddItem(serializationFactory.GetSerialization(mConf.GetClass
(MapperOutputValueClass, null)));
}
else
{
mappersKeySerialization.AddItem(null);
mappersValueSerialization.AddItem(null);
}
}
Type klass_1 = jobConf.GetClass <Reducer>(prefix + ChainReducerClass, null);
if (klass_1 != null)
{
JobConf rConf = new JobConf(GetChainElementConf(jobConf, prefix + ChainReducerConfig
));
reducer = ReflectionUtils.NewInstance(klass_1, rConf);
if (rConf.GetBoolean(ReducerByValue, true))
{
reducerKeySerialization = serializationFactory.GetSerialization(rConf.GetClass(ReducerOutputKeyClass
, null));
reducerValueSerialization = serializationFactory.GetSerialization(rConf.GetClass(
ReducerOutputValueClass, null));
}
else
{
reducerKeySerialization = null;
reducerValueSerialization = null;
}
}
}