org.apache.flink.table.runtime.functions.table.lookup

类 CachingAsyncLookupFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.AsyncTableFunction<org.apache.flink.table.data.RowData>

org.apache.flink.table.functions.AsyncLookupFunction

org.apache.flink.table.runtime.functions.table.lookup.CachingAsyncLookupFunction

所有已实现的接口:

Serializable, org.apache.flink.table.functions.FunctionDefinition

public class CachingAsyncLookupFunction
extends org.apache.flink.table.functions.AsyncLookupFunction

A wrapper function around user-provided async lookup function with a cache layer.

This function will check the cache on lookup request and return entries directly on cache hit, otherwise the function will invoke the actual lookup function, and store the entry into the cache after lookup for later use.

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
static String	LOOKUP_CACHE_METRIC_GROUP_NAME

构造器概要

构造器

构造器和说明
CachingAsyncLookupFunction(org.apache.flink.table.connector.source.lookup.cache.LookupCache cache, org.apache.flink.table.functions.AsyncLookupFunction delegate)

方法概要

限定符和类型	方法和说明
CompletableFuture<Collection<org.apache.flink.table.data.RowData>>	asyncLookup(org.apache.flink.table.data.RowData keyRow)
void	close()
org.apache.flink.table.connector.source.lookup.cache.LookupCache	getCache()
void	open(org.apache.flink.table.functions.FunctionContext context)

从类继承的方法 org.apache.flink.table.functions.AsyncLookupFunction

eval

从类继承的方法 org.apache.flink.table.functions.AsyncTableFunction

getKind, getTypeInference

从类继承的方法 org.apache.flink.table.functions.UserDefinedFunction

functionIdentifier, toString

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.table.functions.FunctionDefinition

getRequirements, isDeterministic, supportsConstantFolding

字段详细资料

LOOKUP_CACHE_METRIC_GROUP_NAME

public static final String LOOKUP_CACHE_METRIC_GROUP_NAME

另请参阅:

常量字段值

构造器详细资料

CachingAsyncLookupFunction

public CachingAsyncLookupFunction(org.apache.flink.table.connector.source.lookup.cache.LookupCache cache,
                                  org.apache.flink.table.functions.AsyncLookupFunction delegate)

方法详细资料

open

public void open(org.apache.flink.table.functions.FunctionContext context)
          throws Exception

覆盖:

open 在类中 org.apache.flink.table.functions.UserDefinedFunction

抛出:

Exception

asyncLookup

public CompletableFuture<Collection<org.apache.flink.table.data.RowData>> asyncLookup(org.apache.flink.table.data.RowData keyRow)

指定者:

asyncLookup 在类中 org.apache.flink.table.functions.AsyncLookupFunction

close

public void close()
           throws Exception

覆盖:

close 在类中 org.apache.flink.table.functions.UserDefinedFunction

抛出:

Exception

getCache

@VisibleForTesting
public org.apache.flink.table.connector.source.lookup.cache.LookupCache getCache()