| /** |
| * 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.hcatalog.mapreduce; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hive.conf.HiveConf; |
| import org.apache.hadoop.hive.serde2.SerDe; |
| import org.apache.hadoop.hive.serde2.SerDeException; |
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector; |
| import org.apache.hadoop.io.NullWritable; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.io.WritableComparable; |
| import org.apache.hadoop.mapred.HCatMapRedUtil; |
| import org.apache.hadoop.mapred.Reporter; |
| import org.apache.hadoop.mapreduce.JobContext; |
| import org.apache.hadoop.mapreduce.OutputCommitter; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| import org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter; |
| import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; |
| import org.apache.hadoop.util.ReflectionUtils; |
| import org.apache.hcatalog.common.ErrorType; |
| import org.apache.hcatalog.common.HCatException; |
| import org.apache.hcatalog.common.HCatUtil; |
| import org.apache.hcatalog.data.HCatRecord; |
| |
| /** |
| * Part of the FileOutput*Container classes |
| * See {@link FileOutputFormatContainer} for more information |
| */ |
| class FileRecordWriterContainer extends RecordWriterContainer { |
| |
| private final HCatStorageHandler storageHandler; |
| private final SerDe serDe; |
| private final ObjectInspector objectInspector; |
| |
| private boolean dynamicPartitioningUsed = false; |
| |
| private final Map<String, org.apache.hadoop.mapred.RecordWriter<? super WritableComparable<?>, ? super Writable>> baseDynamicWriters; |
| private final Map<String, SerDe> baseDynamicSerDe; |
| private final Map<String, org.apache.hadoop.mapred.OutputCommitter> baseDynamicCommitters; |
| private final Map<String, org.apache.hadoop.mapred.TaskAttemptContext> dynamicContexts; |
| private final Map<String, ObjectInspector> dynamicObjectInspectors; |
| private Map<String, OutputJobInfo> dynamicOutputJobInfo; |
| |
| |
| private final List<Integer> partColsToDel; |
| private final List<Integer> dynamicPartCols; |
| private int maxDynamicPartitions; |
| |
| private OutputJobInfo jobInfo; |
| private TaskAttemptContext context; |
| |
| /** |
| * @param baseWriter RecordWriter to contain |
| * @param context current TaskAttemptContext |
| * @throws IOException |
| * @throws InterruptedException |
| */ |
| public FileRecordWriterContainer(org.apache.hadoop.mapred.RecordWriter<? super WritableComparable<?>, ? super Writable> baseWriter, |
| TaskAttemptContext context) throws IOException, InterruptedException { |
| super(context, baseWriter); |
| this.context = context; |
| jobInfo = HCatOutputFormat.getJobInfo(context); |
| |
| storageHandler = HCatUtil.getStorageHandler(context.getConfiguration(), jobInfo.getTableInfo().getStorerInfo()); |
| serDe = ReflectionUtils.newInstance(storageHandler.getSerDeClass(), context.getConfiguration()); |
| objectInspector = InternalUtil.createStructObjectInspector(jobInfo.getOutputSchema()); |
| try { |
| InternalUtil.initializeOutputSerDe(serDe, context.getConfiguration(), jobInfo); |
| } catch (SerDeException e) { |
| throw new IOException("Failed to inialize SerDe", e); |
| } |
| |
| // If partition columns occur in data, we want to remove them. |
| partColsToDel = jobInfo.getPosOfPartCols(); |
| dynamicPartitioningUsed = jobInfo.isDynamicPartitioningUsed(); |
| dynamicPartCols = jobInfo.getPosOfDynPartCols(); |
| maxDynamicPartitions = jobInfo.getMaxDynamicPartitions(); |
| |
| if ((partColsToDel == null) || (dynamicPartitioningUsed && (dynamicPartCols == null))) { |
| throw new HCatException("It seems that setSchema() is not called on " + |
| "HCatOutputFormat. Please make sure that method is called."); |
| } |
| |
| |
| if (!dynamicPartitioningUsed) { |
| this.baseDynamicSerDe = null; |
| this.baseDynamicWriters = null; |
| this.baseDynamicCommitters = null; |
| this.dynamicContexts = null; |
| this.dynamicObjectInspectors = null; |
| this.dynamicOutputJobInfo = null; |
| } else { |
| this.baseDynamicSerDe = new HashMap<String, SerDe>(); |
| this.baseDynamicWriters = new HashMap<String, org.apache.hadoop.mapred.RecordWriter<? super WritableComparable<?>, ? super Writable>>(); |
| this.baseDynamicCommitters = new HashMap<String, org.apache.hadoop.mapred.OutputCommitter>(); |
| this.dynamicContexts = new HashMap<String, org.apache.hadoop.mapred.TaskAttemptContext>(); |
| this.dynamicObjectInspectors = new HashMap<String, ObjectInspector>(); |
| this.dynamicOutputJobInfo = new HashMap<String, OutputJobInfo>(); |
| } |
| } |
| |
| /** |
| * @return the storagehandler |
| */ |
| public HCatStorageHandler getStorageHandler() { |
| return storageHandler; |
| } |
| |
| @Override |
| public void close(TaskAttemptContext context) throws IOException, |
| InterruptedException { |
| Reporter reporter = InternalUtil.createReporter(context); |
| if (dynamicPartitioningUsed) { |
| for (org.apache.hadoop.mapred.RecordWriter<? super WritableComparable<?>, ? super Writable> bwriter : baseDynamicWriters.values()) { |
| //We are in RecordWriter.close() make sense that the context would be TaskInputOutput |
| bwriter.close(reporter); |
| } |
| for (Map.Entry<String, org.apache.hadoop.mapred.OutputCommitter> entry : baseDynamicCommitters.entrySet()) { |
| org.apache.hadoop.mapred.TaskAttemptContext currContext = dynamicContexts.get(entry.getKey()); |
| OutputCommitter baseOutputCommitter = entry.getValue(); |
| if (baseOutputCommitter.needsTaskCommit(currContext)) { |
| baseOutputCommitter.commitTask(currContext); |
| } |
| org.apache.hadoop.mapred.JobContext currJobContext = HCatMapRedUtil.createJobContext(currContext); |
| baseOutputCommitter.commitJob(currJobContext); |
| } |
| } else { |
| getBaseRecordWriter().close(reporter); |
| } |
| } |
| |
| @Override |
| public void write(WritableComparable<?> key, HCatRecord value) throws IOException, |
| InterruptedException { |
| |
| org.apache.hadoop.mapred.RecordWriter localWriter; |
| ObjectInspector localObjectInspector; |
| SerDe localSerDe; |
| OutputJobInfo localJobInfo = null; |
| |
| if (dynamicPartitioningUsed) { |
| // calculate which writer to use from the remaining values - this needs to be done before we delete cols |
| List<String> dynamicPartValues = new ArrayList<String>(); |
| for (Integer colToAppend : dynamicPartCols) { |
| dynamicPartValues.add(value.get(colToAppend).toString()); |
| } |
| |
| String dynKey = dynamicPartValues.toString(); |
| if (!baseDynamicWriters.containsKey(dynKey)) { |
| if ((maxDynamicPartitions != -1) && (baseDynamicWriters.size() > maxDynamicPartitions)) { |
| throw new HCatException(ErrorType.ERROR_TOO_MANY_DYNAMIC_PTNS, |
| "Number of dynamic partitions being created " |
| + "exceeds configured max allowable partitions[" |
| + maxDynamicPartitions |
| + "], increase parameter [" |
| + HiveConf.ConfVars.DYNAMICPARTITIONMAXPARTS.varname |
| + "] if needed."); |
| } |
| |
| org.apache.hadoop.mapred.TaskAttemptContext currTaskContext = HCatMapRedUtil.createTaskAttemptContext(context); |
| configureDynamicStorageHandler(currTaskContext, dynamicPartValues); |
| localJobInfo = HCatBaseOutputFormat.getJobInfo(currTaskContext); |
| |
| //setup serDe |
| SerDe currSerDe = ReflectionUtils.newInstance(storageHandler.getSerDeClass(), currTaskContext.getJobConf()); |
| try { |
| InternalUtil.initializeOutputSerDe(currSerDe, currTaskContext.getConfiguration(), localJobInfo); |
| } catch (SerDeException e) { |
| throw new IOException("Failed to initialize SerDe", e); |
| } |
| |
| //create base OutputFormat |
| org.apache.hadoop.mapred.OutputFormat baseOF = |
| ReflectionUtils.newInstance(storageHandler.getOutputFormatClass(), currTaskContext.getJobConf()); |
| //check outputSpecs |
| baseOF.checkOutputSpecs(null, currTaskContext.getJobConf()); |
| //get Output Committer |
| org.apache.hadoop.mapred.OutputCommitter baseOutputCommitter = currTaskContext.getJobConf().getOutputCommitter(); |
| //create currJobContext the latest so it gets all the config changes |
| org.apache.hadoop.mapred.JobContext currJobContext = HCatMapRedUtil.createJobContext(currTaskContext); |
| //setupJob() |
| baseOutputCommitter.setupJob(currJobContext); |
| //recreate to refresh jobConf of currTask context |
| currTaskContext = |
| HCatMapRedUtil.createTaskAttemptContext(currJobContext.getJobConf(), |
| currTaskContext.getTaskAttemptID(), |
| currTaskContext.getProgressible()); |
| //set temp location |
| currTaskContext.getConfiguration().set("mapred.work.output.dir", |
| new FileOutputCommitter(new Path(localJobInfo.getLocation()), currTaskContext).getWorkPath().toString()); |
| //setupTask() |
| baseOutputCommitter.setupTask(currTaskContext); |
| |
| org.apache.hadoop.mapred.RecordWriter baseRecordWriter = |
| baseOF.getRecordWriter(null, |
| currTaskContext.getJobConf(), |
| FileOutputFormat.getUniqueFile(currTaskContext, "part", ""), |
| InternalUtil.createReporter(currTaskContext)); |
| |
| baseDynamicWriters.put(dynKey, baseRecordWriter); |
| baseDynamicSerDe.put(dynKey, currSerDe); |
| baseDynamicCommitters.put(dynKey, baseOutputCommitter); |
| dynamicContexts.put(dynKey, currTaskContext); |
| dynamicObjectInspectors.put(dynKey, InternalUtil.createStructObjectInspector(jobInfo.getOutputSchema())); |
| dynamicOutputJobInfo.put(dynKey, HCatOutputFormat.getJobInfo(dynamicContexts.get(dynKey))); |
| } |
| |
| localJobInfo = dynamicOutputJobInfo.get(dynKey); |
| localWriter = baseDynamicWriters.get(dynKey); |
| localSerDe = baseDynamicSerDe.get(dynKey); |
| localObjectInspector = dynamicObjectInspectors.get(dynKey); |
| } else { |
| localJobInfo = jobInfo; |
| localWriter = getBaseRecordWriter(); |
| localSerDe = serDe; |
| localObjectInspector = objectInspector; |
| } |
| |
| for (Integer colToDel : partColsToDel) { |
| value.remove(colToDel); |
| } |
| |
| |
| //The key given by user is ignored |
| try { |
| localWriter.write(NullWritable.get(), localSerDe.serialize(value.getAll(), localObjectInspector)); |
| } catch (SerDeException e) { |
| throw new IOException("Failed to serialize object", e); |
| } |
| } |
| |
| protected void configureDynamicStorageHandler(JobContext context, List<String> dynamicPartVals) throws IOException { |
| HCatOutputFormat.configureOutputStorageHandler(context, dynamicPartVals); |
| } |
| |
| } |
