@Override
protected void doHadoopWork() throws BuildException {
Tuple tuple = ContextManager.getCurrentTuple();
if (tuple == null) {
throw new BuildException(
this.getTaskName()
+ " should be put inside task container which provides tuple to execution context");
}
try {
if (tuple.getType(fieldNumber) != DataType.TUPLE
|| !(tuple.get(fieldNumber) instanceof Tuple)) {
throw new BuildException("Tuple field " + fieldNumber + " doesn't represent a Tuple");
}
ContextManager.setCurrentTupleContext((Tuple) tuple.get(fieldNumber));
try {
for (Task task : tasks) {
task.perform();
}
} finally {
ContextManager.resetCurrentTupleContext();
}
} catch (ExecException e) {
throw new BuildException("Failed to check type of tuple field " + fieldNumber, e);
}
}
