/// <summary>Test the most common use case.</summary>
/// <remarks>
/// Test the most common use case. Mark before start of the iteration and
/// reset at the end to go over the entire list
/// </remarks>
/// <param name="key"/>
/// <param name="values"/>
/// <returns/>
/// <exception cref="System.IO.IOException"/>
private static int Test0(IntWritable key, MarkableIterator <IntWritable> values)
{
int errors = 0;
IntWritable i;
AList <IntWritable> expectedValues = new AList <IntWritable>();
Log.Info("Executing TEST:0 for Key:" + key.ToString());
values.Mark();
Log.Info("TEST:0. Marking");
while (values.HasNext())
{
i = values.Next();
expectedValues.AddItem(i);
Log.Info(key + ":" + i);
}
values.Reset();
Log.Info("TEST:0. Reset");
int count = 0;
while (values.HasNext())
{
i = values.Next();
Log.Info(key + ":" + i);
if (i != expectedValues[count])
{
Log.Info("TEST:0. Check:1 Expected: " + expectedValues[count] + ", Got: " + i);
errors++;
return(errors);
}
count++;
}
Log.Info("TEST:0 Done");
return(errors);
}
/// <exception cref="System.IO.IOException"/>
/// <exception cref="System.Exception"/>
protected override void Reduce(IntWritable key, IEnumerable <IntWritable> values,
Reducer.Context context)
{
int errors = 0;
MarkableIterator <IntWritable> mitr = new MarkableIterator <IntWritable>(values.GetEnumerator
());
switch (key.Get())
{
case 0:
{
errors += Test0(key, mitr);
break;
}
case 1:
{
errors += Test1(key, mitr);
break;
}
case 2:
{
errors += Test2(key, mitr);
break;
}
case 3:
{
errors += Test3(key, mitr);
break;
}
default:
{
break;
}
}
context.Write(key, new IntWritable(errors));
}
/// <summary>Test "clearMark"</summary>
/// <param name="key"/>
/// <param name="values"/>
/// <returns/>
/// <exception cref="System.IO.IOException"/>
private static int Test3(IntWritable key, MarkableIterator <IntWritable> values)
{
int errors = 0;
IntWritable i;
AList <IntWritable> expectedValues = new AList <IntWritable>();
Log.Info("Executing TEST:3 for Key:" + key);
values.Mark();
Log.Info("TEST:3. Marking");
int count = 0;
while (values.HasNext())
{
i = values.Next();
Log.Info(key + ":" + i);
if (count == 5)
{
Log.Info("TEST:3. Clearing Mark");
values.ClearMark();
}
if (count == 8)
{
Log.Info("TEST:3. Marking -- " + key + ":" + i);
values.Mark();
}
if (count >= 8)
{
expectedValues.AddItem(i);
}
count++;
}
values.Reset();
Log.Info("TEST:3. After reset");
if (!values.HasNext())
{
errors++;
Log.Info("TEST:3, Check:1. HasNext returned false");
return(errors);
}
count = 0;
while (values.HasNext())
{
i = values.Next();
Log.Info(key + ":" + i);
if (count < expectedValues.Count)
{
if (i != expectedValues[count])
{
errors++;
Log.Info("TEST:2. Check:1 Expected: " + expectedValues[count] + ", Got: " + i);
return(errors);
}
}
if (count == 10)
{
values.ClearMark();
Log.Info("TEST:3. After clear mark");
}
count++;
}
bool successfulClearMark = false;
try
{
Log.Info("TEST:3. Before Reset");
values.Reset();
}
catch (IOException)
{
successfulClearMark = true;
}
if (!successfulClearMark)
{
Log.Info("TEST:3 Check:4 reset was successfule even after clearMark");
errors++;
return(errors);
}
Log.Info("TEST:3 Done.");
return(errors);
}
/// <summary>Test the case where we do a mark inside a reset.</summary>
/// <remarks>
/// Test the case where we do a mark inside a reset. Test for both file
/// and memory
/// </remarks>
/// <param name="key"/>
/// <param name="values"/>
/// <returns/>
/// <exception cref="System.IO.IOException"/>
private static int Test2(IntWritable key, MarkableIterator <IntWritable> values)
{
IntWritable i;
int errors = 0;
int count = 0;
AList <IntWritable> expectedValues = new AList <IntWritable>();
AList <IntWritable> expectedValues1 = new AList <IntWritable>();
Log.Info("Executing TEST:2 for Key:" + key);
values.Mark();
Log.Info("TEST:2 Marking");
while (values.HasNext())
{
i = values.Next();
Log.Info(key + ":" + i);
expectedValues.AddItem(i);
if (count == 8)
{
break;
}
count++;
}
values.Reset();
count = 0;
Log.Info("TEST:2 reset");
while (values.HasNext())
{
i = values.Next();
Log.Info(key + ":" + i);
if (count < expectedValues.Count)
{
if (i != expectedValues[count])
{
errors++;
Log.Info("TEST:2. Check:1 Expected: " + expectedValues[count] + ", Got: " + i);
return(errors);
}
}
// We have moved passed the first mark, but still reading from the
// memory cache
if (count == 3)
{
values.Mark();
Log.Info("TEST:2. Marking -- " + key + ":" + i);
}
if (count >= 3)
{
expectedValues1.AddItem(i);
}
count++;
}
values.Reset();
Log.Info("TEST:2. Reset");
expectedValues.Clear();
count = 0;
while (values.HasNext())
{
i = values.Next();
Log.Info(key + ":" + i);
if (count < expectedValues1.Count)
{
if (i != expectedValues1[count])
{
errors++;
Log.Info("TEST:2. Check:2 Expected: " + expectedValues1[count] + ", Got: " + i);
return(errors);
}
}
// We have moved passed the previous mark, but now we are in the file
// cache
if (count == 20)
{
values.Mark();
Log.Info("TEST:2. Marking -- " + key + ":" + i);
}
if (count >= 20)
{
expectedValues.AddItem(i);
}
count++;
}
values.Reset();
count = 0;
Log.Info("TEST:2. Reset");
while (values.HasNext())
{
i = values.Next();
Log.Info(key + ":" + i);
if (i != expectedValues[count])
{
errors++;
Log.Info("TEST:2. Check:1 Expected: " + expectedValues[count] + ", Got: " + i);
return(errors);
}
}
Log.Info("TEST:2 Done");
return(errors);
}