Package com.linkedin.venice.fastclient

Class DispatchingAvroGenericStoreClient<K,V>

java.lang.Object

com.linkedin.venice.fastclient.InternalAvroStoreClient<K,V>

com.linkedin.venice.fastclient.DispatchingAvroGenericStoreClient<K,V>

All Implemented Interfaces:

AvroGenericReadComputeStoreClient<K,V>, AvroGenericStoreClient<K,V>, java.io.Closeable, java.lang.AutoCloseable

Direct Known Subclasses:

DispatchingAvroSpecificStoreClient, DispatchingVsonStoreClient

public class DispatchingAvroGenericStoreClient<K,V>
extends InternalAvroStoreClient<K,V>

This class is in charge of routing and serialization/de-serialization.

Field Summary

Fields

Modifier and Type	Field	Description
protected StoreMetadata	metadata
protected StoreDeserializerCache<V>	storeDeserializerCache

Constructor Summary

Constructors

Constructor	Description
DispatchingAvroGenericStoreClient(StoreMetadata metadata, ClientConfig config)
DispatchingAvroGenericStoreClient(StoreMetadata metadata, ClientConfig config, TransportClient transportClient)

Method Summary

Modifier and Type	Method	Description
void	close()	Release the internal resources.
protected void	compute(ComputeRequestContext<K,V> requestContext, ComputeRequestWrapper computeRequest, java.util.Set<K> keys, org.apache.avro.Schema resultSchema, StreamingCallback<K,ComputeGenericRecord> callback, long preRequestTimeInNS)
protected java.util.concurrent.CompletableFuture<V>	get(GetRequestContext requestContext, K key)
ClientConfig	getClientConfig()
protected RecordDeserializer<V>	getDataRecordDeserializer(int schemaId)
org.apache.avro.Schema	getKeySchema()	Get key schema.
protected RecordSerializer	getKeySerializer(org.apache.avro.Schema keySchema)
org.apache.avro.Schema	getLatestValueSchema()	Get the latest value schema known in current store client.
protected RecordDeserializer<MultiGetResponseRecordV1>	getMultiGetResponseRecordDeserializer(int schemaId)
protected StoreMetadata	getStoreMetadata()
java.lang.String	getStoreName()
void	start()
protected void	streamingBatchGet(BatchGetRequestContext<K,V> requestContext, java.util.Set<K> keys, StreamingCallback<K,V> callback)	This is the main implementation of the "streaming" version of batch get.

Methods inherited from class com.linkedin.venice.fastclient.InternalAvroStoreClient

batchGet, batchGet, compute, computeWithKeyPrefixFilter, get, isProjectionFieldValidationEnabled, streamingBatchGet, streamingBatchGet, streamingBatchGet

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.linkedin.venice.client.store.AvroGenericReadComputeStoreClient

compute, compute, compute, compute

Methods inherited from interface com.linkedin.venice.client.store.AvroGenericStoreClient

get

Field Detail

metadata

protected final StoreMetadata metadata

storeDeserializerCache

protected StoreDeserializerCache<V> storeDeserializerCache

Constructor Detail

DispatchingAvroGenericStoreClient

public DispatchingAvroGenericStoreClient(StoreMetadata metadata,
                                         ClientConfig config)

DispatchingAvroGenericStoreClient

public DispatchingAvroGenericStoreClient(StoreMetadata metadata,
                                         ClientConfig config,
                                         TransportClient transportClient)

Method Detail

getStoreMetadata

protected StoreMetadata getStoreMetadata()

getClientConfig

public ClientConfig getClientConfig()

Specified by:

getClientConfig in class InternalAvroStoreClient<K,V>

get

protected java.util.concurrent.CompletableFuture<V> get(GetRequestContext requestContext,
                                                        K key)
                                                 throws VeniceClientException

Specified by:

get in class InternalAvroStoreClient<K,V>

Throws:

VeniceClientException

streamingBatchGet

protected void streamingBatchGet(BatchGetRequestContext<K,V> requestContext,
                                 java.util.Set<K> keys,
                                 StreamingCallback<K,V> callback)

This is the main implementation of the "streaming" version of batch get. As such this API doesn't provide a way to handle early exceptions. Further we tend to mix callback style and future style of asynchronous programming which makes it hard to make flexible and composable abstractions on top of this. For future enhancements we could consider returning a java stream , a bounded stream in the shape of a flux (project reactor), or one of the similar java 9 flow constructs.

Specified by:

streamingBatchGet in class InternalAvroStoreClient<K,V>

Parameters:

requestContext -

keys -

callback -

compute

protected void compute(ComputeRequestContext<K,V> requestContext,
                       ComputeRequestWrapper computeRequest,
                       java.util.Set<K> keys,
                       org.apache.avro.Schema resultSchema,
                       StreamingCallback<K,ComputeGenericRecord> callback,
                       long preRequestTimeInNS)
                throws VeniceClientException

Specified by:

compute in class InternalAvroStoreClient<K,V>

Throws:

VeniceClientException

getMultiGetResponseRecordDeserializer

protected RecordDeserializer<MultiGetResponseRecordV1> getMultiGetResponseRecordDeserializer(int schemaId)

getDataRecordDeserializer

protected RecordDeserializer<V> getDataRecordDeserializer(int schemaId)
                                                   throws VeniceClientException

Throws:

VeniceClientException

start

public void start()
           throws VeniceClientException

Throws:

VeniceClientException

getKeySerializer

protected RecordSerializer getKeySerializer(org.apache.avro.Schema keySchema)

close

public void close()

Description copied from interface: AvroGenericStoreClient

Release the internal resources.

getStoreName

public java.lang.String getStoreName()

getKeySchema

public org.apache.avro.Schema getKeySchema()

Description copied from interface: AvroGenericStoreClient

Get key schema.

getLatestValueSchema

public org.apache.avro.Schema getLatestValueSchema()

Description copied from interface: AvroGenericStoreClient

Get the latest value schema known in current store client. This function doesn't guarantee it will return the latest schema if you add a new value schema when current store client is running.