org.apache.nifi.avro

Class AvroReader

java.lang.Object

org.apache.nifi.components.AbstractConfigurableComponent

org.apache.nifi.controller.AbstractControllerService

org.apache.nifi.serialization.SchemaRegistryService

org.apache.nifi.avro.AvroReader

All Implemented Interfaces:

ConfigurableComponent, ControllerService, RecordReaderFactory

@Tags(value={"avro","parse","record","row","reader","delimited","comma","separated","values"})
 @CapabilityDescription(value="Parses Avro data and returns each Avro record as an separate Record object. The Avro data may contain the schema itself, or the schema can be externalized and accessed by one of the methods offered by the \'Schema Access Strategy\' property.")
public class AvroReader
extends SchemaRegistryService
implements RecordReaderFactory

Field Summary

Fields

Modifier and Type	Field and Description
private Map<String,org.apache.avro.Schema>	compiledAvroSchemaCache
private AllowableValue	EMBEDDED_AVRO_SCHEMA
private static int	MAX_AVRO_SCHEMA_CACHE_SIZE

Constructor Summary

Constructors

Constructor and Description
AvroReader()

Method Summary

Modifier and Type	Method and Description
private org.apache.avro.Schema	compileAvroSchema(String text)
RecordReader	createRecordReader(FlowFile flowFile, InputStream in, ComponentLog logger)
protected AllowableValue	getDefaultSchemaAccessStrategy()
protected SchemaAccessStrategy	getSchemaAccessStrategy(String allowableValue, SchemaRegistry schemaRegistry, ConfigurationContext context)
protected SchemaAccessStrategy	getSchemaAccessStrategy(String allowableValue, SchemaRegistry schemaRegistry, ValidationContext context)
protected List<AllowableValue>	getSchemaAccessStrategyValues()

Methods inherited from class org.apache.nifi.serialization.SchemaRegistryService

customValidate, getConfigurationContext, getSchema, getSchemaAccessStrategy, getSchemaAcessStrategyDescriptor, getSuppliedSchemaFields, getSupportedPropertyDescriptors, storeSchemaAccessStrategy

Methods inherited from class org.apache.nifi.controller.AbstractControllerService

abstractClearConfigContext, abstractStoreConfigContext, getControllerServiceLookup, getIdentifier, getLogger, getProperty, getStateManager, init, initialize

Methods inherited from class org.apache.nifi.components.AbstractConfigurableComponent

equals, getPropertyDescriptor, getPropertyDescriptors, getSupportedDynamicPropertyDescriptor, hashCode, onPropertyModified, toString, validate

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.nifi.controller.ControllerService

initialize

Methods inherited from interface org.apache.nifi.components.ConfigurableComponent

getIdentifier, getPropertyDescriptor, getPropertyDescriptors, onPropertyModified, validate

Field Detail

EMBEDDED_AVRO_SCHEMA

private final AllowableValue EMBEDDED_AVRO_SCHEMA

MAX_AVRO_SCHEMA_CACHE_SIZE

private static final int MAX_AVRO_SCHEMA_CACHE_SIZE

See Also:

Constant Field Values

compiledAvroSchemaCache

private final Map<String,org.apache.avro.Schema> compiledAvroSchemaCache

Constructor Detail

AvroReader

public AvroReader()

Method Detail

getSchemaAccessStrategyValues

protected List<AllowableValue> getSchemaAccessStrategyValues()

Overrides:

getSchemaAccessStrategyValues in class SchemaRegistryService

getSchemaAccessStrategy

protected SchemaAccessStrategy getSchemaAccessStrategy(String allowableValue,
                                                       SchemaRegistry schemaRegistry,
                                                       ConfigurationContext context)

Overrides:

getSchemaAccessStrategy in class SchemaRegistryService

getSchemaAccessStrategy

protected SchemaAccessStrategy getSchemaAccessStrategy(String allowableValue,
                                                       SchemaRegistry schemaRegistry,
                                                       ValidationContext context)

Overrides:

getSchemaAccessStrategy in class SchemaRegistryService

createRecordReader

public RecordReader createRecordReader(FlowFile flowFile,
                                       InputStream in,
                                       ComponentLog logger)
                                throws MalformedRecordException,
                                       IOException,
                                       SchemaNotFoundException

Specified by:

createRecordReader in interface RecordReaderFactory

Throws:

MalformedRecordException

IOException

SchemaNotFoundException

compileAvroSchema

private org.apache.avro.Schema compileAvroSchema(String text)

getDefaultSchemaAccessStrategy

protected AllowableValue getDefaultSchemaAccessStrategy()

Overrides:

getDefaultSchemaAccessStrategy in class SchemaRegistryService