/// <summary>test DBInputFormat class.</summary>
/// <remarks>test DBInputFormat class. Class should split result for chunks</remarks>
/// <exception cref="System.Exception"/>
public virtual void TestDBInputFormat()
{
JobConf configuration = new JobConf();
SetupDriver(configuration);
DBInputFormat <DBInputFormat.NullDBWritable> format = new DBInputFormat <DBInputFormat.NullDBWritable
>();
format.SetConf(configuration);
format.SetConf(configuration);
DBInputFormat.DBInputSplit splitter = new DBInputFormat.DBInputSplit(1, 10);
Reporter reporter = Org.Mockito.Mockito.Mock <Reporter>();
RecordReader <LongWritable, DBInputFormat.NullDBWritable> reader = format.GetRecordReader
(splitter, configuration, reporter);
configuration.SetInt(MRJobConfig.NumMaps, 3);
InputSplit[] lSplits = format.GetSplits(configuration, 3);
NUnit.Framework.Assert.AreEqual(5, lSplits[0].GetLength());
NUnit.Framework.Assert.AreEqual(3, lSplits.Length);
// test reader .Some simple tests
NUnit.Framework.Assert.AreEqual(typeof(LongWritable), reader.CreateKey().GetType(
));
NUnit.Framework.Assert.AreEqual(0, reader.GetPos());
NUnit.Framework.Assert.AreEqual(0, reader.GetProgress(), 0.001);
reader.Close();
}
/// <param name="split">The InputSplit to read data for</param>
/// <exception cref="Java.Sql.SQLException"></exception>
protected internal DBRecordReader(DBInputFormat <T> _enclosing, DBInputFormat.DBInputSplit
split, Type inputClass, JobConf job, Connection conn, DBConfiguration dbConfig,
string cond, string[] fields, string table)
: base(split, inputClass, job, conn, dbConfig, cond, fields, table)
{
this._enclosing = _enclosing;
}
/// <summary>The constructor is kept to be compatible with M/R 1.x</summary>
/// <param name="split">The InputSplit to read data for</param>
/// <exception cref="Java.Sql.SQLException"/>
protected internal DBRecordReader(DBInputFormat <T> _enclosing, DBInputFormat.DBInputSplit
split, Type inputClass, JobConf job)
: base(split, inputClass, job, this._enclosing.connection, this._enclosing.dbConf
, this._enclosing.conditions, this._enclosing.fieldNames, this._enclosing.tableName
)
{
this._enclosing = _enclosing;
}
/// <summary>
/// <inheritDoc/>
///
/// </summary>
/// <exception cref="System.IO.IOException"/>
public virtual InputSplit[] GetSplits(JobConf job, int chunks)
{
IList <InputSplit> newSplits = base.GetSplits(Job.GetInstance(job));
InputSplit[] ret = new InputSplit[newSplits.Count];
int i = 0;
foreach (InputSplit s in newSplits)
{
DBInputFormat.DBInputSplit split = (DBInputFormat.DBInputSplit)s;
ret[i++] = new DBInputFormat.DBInputSplit(split.GetStart(), split.GetEnd());
}
return(ret);
}