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NIFI-7817 - Fix ParquetReader instantiation error (apache#4538)
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103 changes: 103 additions & 0 deletions
103
...e/nifi-parquet-processors/src/test/java/org/apache/nifi/parquet/TestParquetProcessor.java
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| /* | ||
| * 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.nifi.parquet; | ||
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| import org.apache.commons.io.IOUtils; | ||
| import org.apache.nifi.components.PropertyDescriptor; | ||
| import org.apache.nifi.flowfile.FlowFile; | ||
| import org.apache.nifi.processor.AbstractProcessor; | ||
| import org.apache.nifi.processor.ProcessContext; | ||
| import org.apache.nifi.processor.ProcessSession; | ||
| import org.apache.nifi.processor.Relationship; | ||
| import org.apache.nifi.processor.exception.ProcessException; | ||
| import org.apache.nifi.processor.util.StandardValidators; | ||
| import org.apache.nifi.serialization.RecordReader; | ||
| import org.apache.nifi.serialization.RecordReaderFactory; | ||
| import org.apache.nifi.serialization.record.Record; | ||
| import org.apache.nifi.util.StringUtils; | ||
|
|
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| import java.io.ByteArrayInputStream; | ||
| import java.io.File; | ||
| import java.io.InputStream; | ||
| import java.util.ArrayList; | ||
| import java.util.HashSet; | ||
| import java.util.List; | ||
| import java.util.Set; | ||
|
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| public class TestParquetProcessor extends AbstractProcessor { | ||
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| public static final PropertyDescriptor READER = new PropertyDescriptor.Builder() | ||
| .name("reader") | ||
| .description("reader") | ||
| .identifiesControllerService(ParquetReader.class) | ||
| .required(true) | ||
| .build(); | ||
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| public static final PropertyDescriptor PATH = new PropertyDescriptor.Builder() | ||
| .name("path") | ||
| .description("path") | ||
| .required(true) | ||
| .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) | ||
| .build(); | ||
|
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| public static final Relationship SUCCESS = new Relationship.Builder() | ||
| .name("success") | ||
| .description("success") | ||
| .build(); | ||
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| @Override | ||
| public void onTrigger(ProcessContext context, ProcessSession session) throws ProcessException { | ||
| FlowFile flowFile = session.get(); | ||
| final RecordReaderFactory readerFactory = context.getProperty(READER).asControllerService(RecordReaderFactory.class); | ||
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| final List<String> records = new ArrayList<>(); | ||
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| byte[] parquetBytes; | ||
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| // read the parquet file into bytes since we can't use a FileInputStream since it doesn't support mark/reset | ||
| try { | ||
| parquetBytes = IOUtils.toByteArray(new File(context.getProperty(PATH).getValue()).toURI()); | ||
| } catch (Exception e) { | ||
| throw new ProcessException(e); | ||
| } | ||
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| try (final InputStream in = new ByteArrayInputStream(parquetBytes); | ||
| final RecordReader reader = readerFactory.createRecordReader(flowFile, in, getLogger())) { | ||
| Record record; | ||
| while ((record = reader.nextRecord()) != null) { | ||
| records.add(record.toString()); | ||
| } | ||
| } catch (Exception e) { | ||
| throw new ProcessException(e); | ||
| } | ||
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| flowFile = session.write(flowFile, (out) -> out.write(StringUtils.join(records, "\n").getBytes())); | ||
| session.transfer(flowFile, SUCCESS); | ||
| } | ||
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| @Override | ||
| protected List<PropertyDescriptor> getSupportedPropertyDescriptors() { | ||
| return new ArrayList<PropertyDescriptor>() {{ add(READER); add(PATH); }}; | ||
| } | ||
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| @Override | ||
| public Set<Relationship> getRelationships() { | ||
| return new HashSet<Relationship>() {{ add(SUCCESS); }}; | ||
| } | ||
|
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| } |
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.../nifi-parquet-bundle/nifi-parquet-processors/src/test/resources/TestParquetReader.parquet
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