| /* |
| * |
| * * Licensed to the Apache Software Foundation (ASF) under one |
| * * or more contributor license agreements. See the NOTICE file |
| * * distributed with this work for additional information |
| * * regarding copyright ownership. The ASF licenses this file |
| * * to you under the Apache License, Version 2.0 (the |
| * * "License"); you may not use this file except in compliance |
| * * with the License. You may obtain a copy of the License at |
| * * |
| * * http://www.apache.org/licenses/LICENSE-2.0 |
| * * |
| * * Unless required by applicable law or agreed to in writing, |
| * * software distributed under the License is distributed on an |
| * * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * * KIND, either express or implied. See the License for the |
| * * specific language governing permissions and limitations |
| * * under the License. |
| * |
| */ |
| package org.apache.asterix.bad.function.runtime; |
| |
| import java.io.DataOutput; |
| |
| import org.apache.asterix.bad.function.BADFunctions; |
| import org.apache.asterix.bad.runtime.ActiveTimestampManager; |
| import org.apache.asterix.bad.runtime.ActiveTimestampState; |
| import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider; |
| import org.apache.asterix.om.base.ADateTime; |
| import org.apache.asterix.om.base.AMutableDateTime; |
| import org.apache.asterix.om.functions.IFunctionDescriptorFactory; |
| import org.apache.asterix.om.types.BuiltinType; |
| import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor; |
| import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier; |
| import org.apache.hyracks.algebricks.runtime.base.IEvaluatorContext; |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator; |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory; |
| import org.apache.hyracks.api.context.IHyracksJobletContext; |
| import org.apache.hyracks.api.dataflow.value.ISerializerDeserializer; |
| import org.apache.hyracks.api.exceptions.HyracksDataException; |
| import org.apache.hyracks.data.std.api.IPointable; |
| import org.apache.hyracks.data.std.primitive.VoidPointable; |
| import org.apache.hyracks.data.std.util.ArrayBackedValueStorage; |
| import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference; |
| |
| public class PreviousChannelTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor { |
| |
| private static final long serialVersionUID = 1L; |
| private final static FunctionIdentifier FID = BADFunctions.PREVIOUS_CHANNEL_TIME; |
| private final static long ActiveStateKey = 1024; |
| |
| public final static IFunctionDescriptorFactory FACTORY = PreviousChannelTimeDescriptor::new; |
| |
| private PreviousChannelTimeDescriptor() { |
| } |
| |
| @Override |
| public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) { |
| return new IScalarEvaluatorFactory() { |
| |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public IScalarEvaluator createScalarEvaluator(IEvaluatorContext ctx) throws HyracksDataException { |
| return new IScalarEvaluator() { |
| |
| private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage(); |
| private DataOutput out = resultStorage.getDataOutput(); |
| private final IPointable argPtr0 = new VoidPointable(); |
| private final IScalarEvaluator eval0 = args[0].createScalarEvaluator(ctx); |
| |
| @SuppressWarnings("unchecked") |
| private ISerializerDeserializer<ADateTime> datetimeSerde = |
| SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ADATETIME); |
| private AMutableDateTime aDateTime = new AMutableDateTime(0); |
| private IHyracksJobletContext jobletCtx = ctx.getTaskContext().getJobletContext(); |
| |
| @Override |
| public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException { |
| |
| ActiveTimestampState existingState = |
| (ActiveTimestampState) ctx.getTaskContext().getStateObject(ActiveStateKey); |
| resultStorage.reset(); |
| |
| if (existingState == null) { |
| eval0.evaluate(tuple, argPtr0); |
| // offset the type |
| String channelName = new String(argPtr0.getByteArray(), argPtr0.getStartOffset() + 2, |
| argPtr0.getLength() - 2); |
| String nodeId = jobletCtx.getServiceContext().getNodeId(); |
| ActiveTimestampManager.progressChannelExecutionTimestamps(jobletCtx.getJobId(), channelName, |
| nodeId); |
| long previousChannelTime = |
| ActiveTimestampManager.getPreviousChannelExecutionTimestamp(channelName, nodeId); |
| long currentChannelTime = |
| ActiveTimestampManager.getCurrentChannelExecutionTimestamp(channelName, nodeId); |
| existingState = new ActiveTimestampState(jobletCtx.getJobId(), ActiveStateKey); |
| existingState.setExecutionTime(previousChannelTime, currentChannelTime); |
| ctx.getTaskContext().setStateObject(existingState); |
| } |
| aDateTime.setValue(existingState.getPreviousChannelExecutionTime()); |
| datetimeSerde.serialize(aDateTime, out); |
| result.set(resultStorage); |
| } |
| }; |
| } |
| }; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.asterix.om.functions.IFunctionDescriptor#getIdentifier() |
| */ |
| @Override |
| public FunctionIdentifier getIdentifier() { |
| return FID; |
| } |
| |
| } |