org.springframework.cloud.stream.schema.avro

Class AvroSchemaServiceManagerImpl

java.lang.Object

org.springframework.cloud.stream.schema.avro.AvroSchemaServiceManagerImpl

All Implemented Interfaces:

AvroSchemaServiceManager

@Component
public class AvroSchemaServiceManagerImpl
extends Object
implements AvroSchemaServiceManager

Default Concrete implementation of AvroSchemaServiceManager. Helps to substitute the default implementation of Schema Generation using Custom Avro schema generator Provide a custom bean definition of AvroSchemaServiceManager and mark it as @Primary to override this default implementation

Author:

Ish Mahajan

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.commons.logging.Log	logger

Constructor Summary

Constructors

Constructor and Description
AvroSchemaServiceManagerImpl()

Method Summary

Modifier and Type	Method and Description
org.apache.avro.io.DatumReader<Object>	getDatumReader(Class<?> type, org.apache.avro.Schema schema, org.apache.avro.Schema writerSchema) get DatumReader.
org.apache.avro.io.DatumWriter<Object>	getDatumWriter(Class<?> type, org.apache.avro.Schema schema) get DatumWriter.
org.apache.avro.Schema	getSchema(Class<?> clazz) get Schema.
Object	readData(Class<? extends Object> clazz, byte[] payload, org.apache.avro.Schema readerSchema, org.apache.avro.Schema writerSchema) read data from avro type payload DatumReader.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

logger

protected final org.apache.commons.logging.Log logger

Constructor Detail

AvroSchemaServiceManagerImpl

public AvroSchemaServiceManagerImpl()

Method Detail

getSchema

public org.apache.avro.Schema getSchema(Class<?> clazz)

get Schema.

Specified by:

getSchema in interface AvroSchemaServiceManager

Parameters:

clazz - Class for which schema generation is required

Returns:

returns avro schema for given class

getDatumWriter

public org.apache.avro.io.DatumWriter<Object> getDatumWriter(Class<?> type,
                                                             org.apache.avro.Schema schema)

get DatumWriter.

Specified by:

getDatumWriter in interface AvroSchemaServiceManager

Parameters:

type - Class of java object which needs to be serialized

schema - Schema of object which needs to be serialized

Returns:

datum writer which can be used to write Avro payload

getDatumReader

public org.apache.avro.io.DatumReader<Object> getDatumReader(Class<?> type,
                                                             org.apache.avro.Schema schema,
                                                             org.apache.avro.Schema writerSchema)

get DatumReader.

Specified by:

getDatumReader in interface AvroSchemaServiceManager

Parameters:

type - Class of java object which needs to be serialized

schema - Schema default schema of object which needs to be de-serialized

writerSchema - Schema writerSchema provided at run time

Returns:

datum reader which can be used to read Avro payload

readData

public Object readData(Class<? extends Object> clazz,
                       byte[] payload,
                       org.apache.avro.Schema readerSchema,
                       org.apache.avro.Schema writerSchema)
                throws IOException

read data from avro type payload DatumReader.

Specified by:

readData in interface AvroSchemaServiceManager

Parameters:

clazz - Class of java object which needs to be serialized

payload - byte serialized payload of object which needs to be de-serialized

readerSchema - Schema readerSchema of object which needs to be de-serialized

writerSchema - Schema writerSchema used to while serializing payload

Returns:

java object after reading Avro Payload

Throws:

IOException - is thrown in case of error