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86
...lates/cdap-etl/cdap-etl-core/src/main/java/io/cdap/cdap/etl/batch/WrappedInputFormat.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| /* | ||
| * Copyright © 2024 Cask Data, Inc. | ||
| * | ||
| * Licensed 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 io.cdap.cdap.etl.batch; | ||
|
|
||
| import io.cdap.cdap.api.exception.WrappedException; | ||
| import java.io.IOException; | ||
| import java.util.List; | ||
| import org.apache.hadoop.mapreduce.InputFormat; | ||
| import org.apache.hadoop.mapreduce.InputSplit; | ||
| import org.apache.hadoop.mapreduce.JobContext; | ||
| import org.apache.hadoop.mapreduce.RecordReader; | ||
| import org.apache.hadoop.mapreduce.TaskAttemptContext; | ||
|
|
||
| public class WrappedInputFormat<K, V> extends InputFormat<K, V> { | ||
| private final InputFormat<K, V> inputFormat; | ||
| private final String stageName; | ||
|
|
||
| @Override | ||
| public List<InputSplit> getSplits(JobContext jobContext) | ||
| throws IOException, InterruptedException { | ||
| try { | ||
| return inputFormat.getSplits(jobContext); | ||
| } catch (Exception e) { | ||
| if (stageName != null) { | ||
| throw new WrappedException(e, stageName); | ||
| } | ||
| throw e; | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public RecordReader<K, V> createRecordReader(InputSplit inputSplit, | ||
| TaskAttemptContext taskAttemptContext) throws IOException, InterruptedException { | ||
| try { | ||
| return new WrappedRecordReader<>(inputFormat.createRecordReader(inputSplit, | ||
| taskAttemptContext), stageName); | ||
| } catch (Exception e) { | ||
| if (stageName != null) { | ||
| throw new WrappedException(e, stageName); | ||
| } | ||
| throw e; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Returns the delegating {@link InputFormat} based on the current configuration. | ||
| * | ||
| * @param classLoader the {@link ClassLoader} for loading input format | ||
| * @param inputFormatClassName the name of {@link InputFormat} class | ||
| * @throws IOException if failed to instantiate the input format class | ||
| */ | ||
| public WrappedInputFormat(ClassLoader classLoader, String inputFormatClassName, | ||
| String stageName) throws IOException { | ||
| this.stageName = stageName; | ||
| if (inputFormatClassName == null) { | ||
| throw new IllegalArgumentException("Missing configuration for the InputFormat to use"); | ||
| } | ||
| if (inputFormatClassName.equals(getClass().getName())) { | ||
| throw new IllegalArgumentException("Cannot delegate InputFormat to the same class"); | ||
| } | ||
| try { | ||
| //noinspection unchecked | ||
| @SuppressWarnings("unchecked") | ||
| Class<InputFormat<K, V>> inputFormatClass = (Class<InputFormat<K, V>>) classLoader.loadClass( | ||
| inputFormatClassName); | ||
| this.inputFormat = inputFormatClass.newInstance(); | ||
| } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) { | ||
| throw new IOException( | ||
| String.format("Unable to instantiate delegate input format %s", inputFormatClassName), e); | ||
| } | ||
| } | ||
| } |
106 changes: 106 additions & 0 deletions
106
...ates/cdap-etl/cdap-etl-core/src/main/java/io/cdap/cdap/etl/batch/WrappedRecordReader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| /* | ||
| * Copyright © 2024 Cask Data, Inc. | ||
| * | ||
| * Licensed 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 io.cdap.cdap.etl.batch; | ||
|
|
||
| import io.cdap.cdap.api.exception.WrappedException; | ||
| import java.io.IOException; | ||
| import org.apache.hadoop.mapreduce.InputSplit; | ||
| import org.apache.hadoop.mapreduce.RecordReader; | ||
| import org.apache.hadoop.mapreduce.TaskAttemptContext; | ||
|
|
||
| public class WrappedRecordReader<K, V> extends RecordReader<K, V> { | ||
| private final RecordReader<K, V> recordReader; | ||
| private final String stageName; | ||
|
|
||
| public WrappedRecordReader(RecordReader<K, V> recordReader, String stageName) { | ||
| this.recordReader = recordReader; | ||
| this.stageName = stageName; | ||
| } | ||
|
|
||
| @Override | ||
| public void initialize(InputSplit inputSplit, TaskAttemptContext taskAttemptContext) | ||
| throws IOException, InterruptedException { | ||
| try { | ||
| recordReader.initialize(inputSplit, taskAttemptContext); | ||
| } catch (Exception e) { | ||
| if (stageName != null) { | ||
| throw new WrappedException(e, stageName); | ||
| } | ||
| throw e; | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public boolean nextKeyValue() throws IOException, InterruptedException { | ||
| try { | ||
| return recordReader.nextKeyValue(); | ||
| } catch (Exception e) { | ||
| if (stageName != null) { | ||
| throw new WrappedException(e, stageName); | ||
| } | ||
| throw e; | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public K getCurrentKey() throws IOException, InterruptedException { | ||
| try { | ||
| return recordReader.getCurrentKey(); | ||
| } catch (Exception e) { | ||
| if (stageName != null) { | ||
| throw new WrappedException(e, stageName); | ||
| } | ||
| throw e; | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public V getCurrentValue() throws IOException, InterruptedException { | ||
| try { | ||
| return recordReader.getCurrentValue(); | ||
| } catch (Exception e) { | ||
| if (stageName != null) { | ||
| throw new WrappedException(e, stageName); | ||
| } | ||
| throw e; | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public float getProgress() throws IOException, InterruptedException { | ||
| try { | ||
| return recordReader.getProgress(); | ||
| } catch (Exception e) { | ||
| if (stageName != null) { | ||
| throw new WrappedException(e, stageName); | ||
| } | ||
| throw e; | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void close() throws IOException { | ||
| try { | ||
| recordReader.close(); | ||
| } catch (Exception e) { | ||
| if (stageName != null) { | ||
| throw new WrappedException(e, stageName); | ||
| } | ||
| throw e; | ||
| } | ||
| } | ||
| } |
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