| package edu.uci.ics.asterix.runtime.evaluators.functions; |
| |
| import java.io.IOException; |
| |
| import edu.uci.ics.asterix.common.functions.FunctionConstants; |
| import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ABooleanSerializerDeserializer; |
| import edu.uci.ics.asterix.om.functions.IFunctionDescriptor; |
| import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory; |
| import edu.uci.ics.asterix.om.types.ATypeTag; |
| import edu.uci.ics.asterix.om.types.EnumDeserializer; |
| import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor; |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.ArrayBackedValueStorage; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.IDataOutputProvider; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference; |
| |
| public class InjectFailureDescriptor extends AbstractScalarFunctionDynamicDescriptor { |
| |
| private static final long serialVersionUID = 1L; |
| private final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, |
| "inject-failure", 2, true); |
| public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() { |
| public IFunctionDescriptor createFunctionDescriptor() { |
| return new InjectFailureDescriptor(); |
| } |
| }; |
| |
| @Override |
| public FunctionIdentifier getIdentifier() { |
| return FID; |
| } |
| |
| @Override |
| public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException { |
| |
| return new ICopyEvaluatorFactory() { |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException { |
| |
| final ArrayBackedValueStorage argOut = new ArrayBackedValueStorage(); |
| final ICopyEvaluator[] evals = new ICopyEvaluator[args.length]; |
| evals[0] = args[0].createEvaluator(argOut); |
| evals[1] = args[1].createEvaluator(argOut); |
| |
| return new ICopyEvaluator() { |
| |
| @Override |
| public void evaluate(IFrameTupleReference tuple) throws AlgebricksException { |
| try { |
| // evaluator the failure condition |
| argOut.reset(); |
| evals[1].evaluate(tuple); |
| ATypeTag typeTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(argOut.getByteArray()[0]); |
| if (typeTag == ATypeTag.BOOLEAN) { |
| boolean argResult = ABooleanSerializerDeserializer.getBoolean(argOut.getByteArray(), 1); |
| if (argResult) |
| throw new AlgebricksException("Injecting a intended failure"); |
| } |
| |
| // evaluate the real evaluator |
| argOut.reset(); |
| evals[0].evaluate(tuple); |
| output.getDataOutput().write(argOut.getByteArray(), argOut.getStartOffset(), argOut.getLength()); |
| } catch (IOException e) { |
| throw new AlgebricksException(e); |
| } |
| } |
| |
| }; |
| } |
| }; |
| } |
| } |