it.agilelab.darwin.manager

CachedAvroSchemaManager

abstract class CachedAvroSchemaManager extends AvroSchemaManager

Implementation of AvroSchemaManager that defines a cache where the storage data is loaded, in order to reduce the number of accesses to the storage.

Linear Supertypes
AvroSchemaManager, Logging, AnyRef, Any
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  1. CachedAvroSchemaManager
  2. AvroSchemaManager
  3. Logging
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Instance Constructors

  1. new CachedAvroSchemaManager(connector: Connector, endianness: ByteOrder)

Abstract Value Members

  1. abstract def getSchema(id: Long): Option[Schema]

    Extracts the Schema from its ID.

    Extracts the Schema from its ID.

    id

    a Long representing an ID

    returns

    the Schema associated to the input ID

    Definition Classes
    AvroSchemaManager

Concrete Value Members

  1. final def !=(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  2. final def !=(arg0: Any): Boolean

    Definition Classes
    Any
  3. final def ##(): Int

    Definition Classes
    AnyRef → Any
  4. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  5. final def ==(arg0: Any): Boolean

    Definition Classes
    Any
  6. val _cache: AtomicReference[Option[AvroSchemaCache]]

    Attributes
    protected
  7. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  8. def cache: AvroSchemaCache

  9. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  10. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  11. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any
  12. def extractSchema(array: Array[Byte]): Either[Exception, Schema]

    Extracts the schema from the avro single-object encoded in the input array.

    Extracts the schema from the avro single-object encoded in the input array.

    array

    avro single-object encoded array

    returns

    the schema ID extracted from the input data

    Definition Classes
    AvroSchemaManager
  13. def extractSchema(inputStream: InputStream): Either[Array[Byte], Schema]

    Extracts the schema from the avro single-object encoded at the head of this input stream.

    Extracts the schema from the avro single-object encoded at the head of this input stream. The input stream will have 10 bytes consumed if the first two bytes correspond to the single object encoded header, or zero bytes consumed if the InputStream supports marking; if it doesn't, the first bytes (up to 2) will be consumed and returned in the Left part of the Either

    inputStream

    avro single-object encoded input stream

    returns

    the schema ID extracted from the input data

    Definition Classes
    AvroSchemaManager
  14. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  15. def generateAvroSingleObjectEncoded(byteStream: OutputStream, schemaId: Long)(avroWriter: (OutputStream) ⇒ OutputStream): OutputStream

    Writes to the given OutputStream the Single Object Encoding header then calls the avroWriter function to possibly add data to the stream and finally returns the OutputStream

    Writes to the given OutputStream the Single Object Encoding header then calls the avroWriter function to possibly add data to the stream and finally returns the OutputStream

    byteStream

    the stream to write to

    schemaId

    id of the schema used to encode the payload

    avroWriter

    function that will be called to add user generated avro to the stream

    returns

    the input OutputStream

    Definition Classes
    AvroSchemaManager
  16. def generateAvroSingleObjectEncoded(byteStream: OutputStream, avroValue: Array[Byte], schemaId: Long): OutputStream

    Writes to the given OutputStream the Single Object Encoding header then the avroValue and returns the OutputStream

    Writes to the given OutputStream the Single Object Encoding header then the avroValue and returns the OutputStream

    byteStream

    the stream to write to

    avroValue

    the value to be written to the stream

    schemaId

    id of the schema used to encode the payload

    returns

    the input OutputStream

    Definition Classes
    AvroSchemaManager
  17. def generateAvroSingleObjectEncoded(avroPayload: Array[Byte], schema: Schema): Array[Byte]

    Create an array that creates a Single-Object encoded byte array.

    Create an array that creates a Single-Object encoded byte array. By specifications the encoded array is obtained concatenating the V1_HEADER, the schema id and the avro-encoded payload.

    avroPayload

    avro-serialized payload

    schema

    the schema used to encode the payload

    returns

    a Single-Object encoded byte array

    Definition Classes
    AvroSchemaManager
  18. def getAll: Seq[(Long, Schema)]

    Retrieves all registered schemas

    Retrieves all registered schemas

    returns

    A Sequence of (ID, Schema)

    Definition Classes
    CachedAvroSchemaManagerAvroSchemaManager
  19. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  20. def getEndianness(): ByteOrder

    returns

    the configured endianness of this AvroSchemaManager instance

    Definition Classes
    AvroSchemaManager
  21. def getId(schema: Schema): Long

    Extracts the ID from a Schema.

    Extracts the ID from a Schema.

    schema

    a Schema with unknown ID

    returns

    the ID associated with the input schema

    Definition Classes
    AvroSchemaManager
  22. def hashCode(): Int

    Definition Classes
    AnyRef → Any
  23. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any
  24. def log: Logger

    Definition Classes
    Logging
  25. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  26. final def notify(): Unit

    Definition Classes
    AnyRef
  27. final def notifyAll(): Unit

    Definition Classes
    AnyRef
  28. def registerAll(schemas: Seq[Schema]): Seq[(Long, Schema)]

    Checks if all the input Schema elements are already in the cache.

    Checks if all the input Schema elements are already in the cache. Then, it performs an insert on the storage for all the elements not found on the cache, and then returns each input schema paired with its ID.

    schemas

    all the Schema that should be registered

    returns

    a sequence of pairs of the input schemas associated with their IDs

    Definition Classes
    CachedAvroSchemaManagerAvroSchemaManager
  29. def registerAll(schemas: Iterable[Schema]): Iterable[IdSchemaPair]

    JAVA API: Checks if all the input Schema elements are already in the cache.

    JAVA API: Checks if all the input Schema elements are already in the cache. Then, it performs an insert on the storage for all the elements not found on the cache, and then returns each input schema paired with its ID.

    schemas

    all the Schema that should be registered

    returns

    a sequence of pairs of the input schemas associated with their IDs

    Definition Classes
    AvroSchemaManager
  30. def reload(): AvroSchemaManager

    Reloads all the schemas from the previously configured storage.

    Reloads all the schemas from the previously configured storage. Throws an exception if the cache wasn't already loaded (the getInstance method must always be used to initialize the cache using the required configuration).

    Definition Classes
    CachedAvroSchemaManagerAvroSchemaManager
  31. def retrieveSchemaAndAvroPayload(avroSingleObjectEncoded: ByteBuffer): Schema

    Extracts the Schema from the ByteBuffer after the method call the ByteBuffer position will be right after the header.

    Extracts the Schema from the ByteBuffer after the method call the ByteBuffer position will be right after the header.

    avroSingleObjectEncoded

    a ByteBuffer of a Single-Object encoded payload

    returns

    the avro Schema

    Definition Classes
    AvroSchemaManager
  32. def retrieveSchemaAndAvroPayload(avroSingleObjectEncoded: Array[Byte]): (Schema, Array[Byte])

    Extracts a Tuple2 that contains the Schema and the Avro-encoded payload

    Extracts a Tuple2 that contains the Schema and the Avro-encoded payload

    avroSingleObjectEncoded

    a byte array of a Single-Object encoded payload

    returns

    a pair containing the Schema and the payload of the input array

    Definition Classes
    AvroSchemaManager
  33. def retrieveSchemaAndPayload(avroSingleObjectEncoded: Array[Byte]): SchemaPayloadPair

    Extracts a SchemaPayloadPair that contains the Schema and the Avro-encoded payload

    Extracts a SchemaPayloadPair that contains the Schema and the Avro-encoded payload

    avroSingleObjectEncoded

    a byte array of a Single-Object encoded payload

    returns

    a SchemaPayloadPair containing the Schema and the payload of the input array

    Definition Classes
    AvroSchemaManager
  34. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  35. def toString(): String

    Definition Classes
    AnyRef → Any
  36. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  37. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  38. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  39. def writeHeaderToStream(byteStream: OutputStream, schemaId: Long): OutputStream

    Writes to the given OutputStream the Single Object Encoding header and returns the OutputStream

    Writes to the given OutputStream the Single Object Encoding header and returns the OutputStream

    returns

    the input OutputStream

    Definition Classes
    AvroSchemaManager

Inherited from AvroSchemaManager

Inherited from Logging

Inherited from AnyRef

Inherited from Any

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