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NIFI-1117 Added unit tests and default behavior for avro files with no records. Also fixed a findbugs warning in SplitAvro (made inner classes static)

This commit is contained in:
Tony Kurc 2015-11-07 15:35:03 -05:00
parent a031fb3dc6
commit 9756e9f126
3 changed files with 46 additions and 12 deletions
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21
nifi-nar-bundles/nifi-avro-bundle/nifi-avro-processors/src/main/java/org/apache/nifi/processors/avro/ConvertAvroToJSON.java
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@ -61,6 +61,8 @@ public class ConvertAvroToJSON extends AbstractProcessor {
protected static final String CONTAINER_ARRAY = "array";
protected static final String CONTAINER_NONE = "none";
private static final byte [] EMPTY_JSON_OBJECT = "{}".getBytes(StandardCharsets.UTF_8);
static final PropertyDescriptor CONTAINER_OPTIONS = new PropertyDescriptor.Builder()
.name("JSON container options")
.description("Determines how stream of records is exposed: either as a sequence of single Objects (" + CONTAINER_NONE
@ -123,16 +125,18 @@ public class ConvertAvroToJSON extends AbstractProcessor {
final DataFileStream<GenericRecord> reader = new DataFileStream<>(in, new GenericDatumReader<GenericRecord>())) {
final GenericData genericData = GenericData.get();
GenericRecord record = reader.next();
final String json = genericData.toString(record);
int recordCount = 0;
if (reader.hasNext() == false ) {
out.write(EMPTY_JSON_OBJECT);
return;
}
int recordCount = 1;
GenericRecord reuse = reader.next();
// Only open container if more than one record
if(reader.hasNext() && containerOption.equals(CONTAINER_ARRAY)){
out.write('[');
}
out.write(json.getBytes(StandardCharsets.UTF_8));
recordCount++;
out.write(genericData.toString(reuse).getBytes(StandardCharsets.UTF_8));
while (reader.hasNext()) {
if (containerOption.equals(CONTAINER_ARRAY)) {
@ -141,11 +145,12 @@ public class ConvertAvroToJSON extends AbstractProcessor {
out.write('\n');
}
final GenericRecord nextRecord = reader.next(record);
out.write(genericData.toString(nextRecord).getBytes(StandardCharsets.UTF_8));
reuse = reader.next(reuse);
out.write(genericData.toString(reuse).getBytes(StandardCharsets.UTF_8));
recordCount++;
}
// Only close container if more than one record
if (recordCount > 1 && containerOption.equals(CONTAINER_ARRAY)) {
out.write(']');
}

6
nifi-nar-bundles/nifi-avro-bundle/nifi-avro-processors/src/main/java/org/apache/nifi/processors/avro/SplitAvro.java
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@ -218,7 +218,7 @@ public class SplitAvro extends AbstractProcessor {
/**
* Splits the incoming Avro datafile into batches of records by reading and de-serializing each record.
*/
private class RecordSplitter implements Splitter {
static private class RecordSplitter implements Splitter {
private final int splitSize;
private final boolean transferMetadata;
@ -300,7 +300,7 @@ public class SplitAvro extends AbstractProcessor {
/**
* Writes a binary Avro Datafile to the OutputStream.
*/
private class DatafileSplitWriter implements SplitWriter {
static private class DatafileSplitWriter implements SplitWriter {
private final boolean transferMetadata;
private DataFileWriter<GenericRecord> writer;
@ -344,7 +344,7 @@ public class SplitAvro extends AbstractProcessor {
/**
* Writes bare Avro records to the OutputStream.
*/
private class BareRecordSplitWriter implements SplitWriter {
static private class BareRecordSplitWriter implements SplitWriter {
private Encoder encoder;
private DatumWriter<GenericRecord> writer;

29
nifi-nar-bundles/nifi-avro-bundle/nifi-avro-processors/src/test/java/org/apache/nifi/processors/avro/TestConvertAvroToJSON.java
View File

@ -126,4 +126,33 @@ public class TestConvertAvroToJSON {
final MockFlowFile out = runner.getFlowFilesForRelationship(ConvertAvroToJSON.REL_SUCCESS).get(0);
out.assertContentEquals("{\"name\": \"Alyssa\", \"favorite_number\": 256, \"favorite_color\": null}\n{\"name\": \"George\", \"favorite_number\": 1024, \"favorite_color\": \"red\"}");
}
@Test
public void testEmptyFlowFile() throws IOException {
final TestRunner runner = TestRunners.newTestRunner(new ConvertAvroToJSON());
runner.enqueue(new byte[]{});
runner.run();
runner.assertAllFlowFilesTransferred(ConvertAvroToJSON.REL_FAILURE, 1);
}
@Test
public void testZeroRecords() throws IOException {
final TestRunner runner = TestRunners.newTestRunner(new ConvertAvroToJSON());
final Schema schema = new Schema.Parser().parse(new File("src/test/resources/user.avsc"));
final DatumWriter<GenericRecord> datumWriter = new GenericDatumWriter<>(schema);
final ByteArrayOutputStream out1 = serializeAvroRecord(schema, datumWriter);
runner.enqueue(out1.toByteArray());
runner.run();
runner.assertAllFlowFilesTransferred(ConvertAvroToJSON.REL_SUCCESS, 1);
final MockFlowFile out = runner.getFlowFilesForRelationship(ConvertAvroToJSON.REL_SUCCESS).get(0);
out.assertContentEquals("{}");
}
}