/*
* 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.vxquery.metadata;
import java.io.File;
import java.nio.ByteBuffer;
import java.util.Iterator;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.filefilter.TrueFileFilter;
import org.apache.vxquery.context.DynamicContext;
import org.apache.vxquery.xmlparser.ITreeNodeIdProvider;
import org.apache.vxquery.xmlparser.TreeNodeIdProvider;
import org.apache.vxquery.xmlparser.XMLParser;
import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
import edu.uci.ics.hyracks.api.job.IOperatorDescriptorRegistry;
import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender;
import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils;
import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor;
import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputUnaryOutputOperatorNodePushable;
public class VXQueryCollectionOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor {
private static final long serialVersionUID = 1L;
private short dataSourceId;
private short totalDataSources;
private String[] collectionPartitions;
private List<Integer> childSeq;
protected static final Logger LOGGER = Logger.getLogger(VXQueryCollectionOperatorDescriptor.class.getName());
public VXQueryCollectionOperatorDescriptor(IOperatorDescriptorRegistry spec, VXQueryCollectionDataSource ds,
RecordDescriptor rDesc) {
super(spec, 1, 1);
collectionPartitions = ds.getPartitions();
dataSourceId = (short) ds.getDataSourceId();
totalDataSources = (short) ds.getTotalDataSources();
childSeq = ds.getChildSeq();
recordDescriptors[0] = rDesc;
}
@Override
public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException {
final FrameTupleAccessor fta = new FrameTupleAccessor(ctx.getFrameSize(),
recordDescProvider.getInputRecordDescriptor(getActivityId(), 0));
final int fieldOutputCount = recordDescProvider.getOutputRecordDescriptor(getActivityId(), 0).getFieldCount();
final ByteBuffer frame = ctx.allocateFrame();
final FrameTupleAppender appender = new FrameTupleAppender(ctx.getFrameSize(), fieldOutputCount);
final short partitionId = (short) ctx.getTaskAttemptId().getTaskId().getPartition();
final ITreeNodeIdProvider nodeIdProvider = new TreeNodeIdProvider(partitionId, dataSourceId, totalDataSources);
final String nodeId = ctx.getJobletContext().getApplicationContext().getNodeId();
final DynamicContext dCtx = (DynamicContext) ctx.getJobletContext().getGlobalJobData();
final String collectionName = collectionPartitions[partition % collectionPartitions.length];
final XMLParser parser = new XMLParser(false, nodeIdProvider, nodeId, frame, appender, childSeq,
dCtx.getStaticContext());
return new AbstractUnaryInputUnaryOutputOperatorNodePushable() {
@Override
public void open() throws HyracksDataException {
appender.reset(frame, true);
writer.open();
}
@Override
public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
fta.reset(buffer);
String collectionModifiedName = collectionName.replace("${nodeId}", nodeId);
File collectionDirectory = new File(collectionModifiedName);
// Go through each tuple.
if (collectionDirectory.isDirectory()) {
for (int tupleIndex = 0; tupleIndex < fta.getTupleCount(); ++tupleIndex) {
@SuppressWarnings("unchecked")
Iterator<File> it = FileUtils.iterateFiles(collectionDirectory, new VXQueryIOFileFilter(),
TrueFileFilter.INSTANCE);
while (it.hasNext()) {
File xmlDocument = it.next();
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("Starting to read XML document: " + xmlDocument.getAbsolutePath());
}
parser.parseElements(xmlDocument, writer, fta, tupleIndex);
}
}
} else {
throw new HyracksDataException("Invalid directory parameter (" + nodeId + ":"
+ collectionDirectory.getAbsolutePath() + ") passed to collection.");
}
}
@Override
public void fail() throws HyracksDataException {
writer.fail();
}
@Override
public void close() throws HyracksDataException {
// Check if needed?
fta.reset(frame);
if (fta.getTupleCount() > 0) {
FrameUtils.flushFrame(frame, writer);
}
writer.close();
}
};
}
}