org.dataloader

Class DataLoaderRegistry

java.lang.Object

org.dataloader.DataLoaderRegistry

Direct Known Subclasses:

ScheduledDataLoaderRegistry

@PublicApi
public class DataLoaderRegistry
extends java.lang.Object

This allows data loaders to be registered together into a single place so they can be dispatched as one. It also allows you to retrieve data loaders by name from a central place

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DataLoaderRegistry.Builder

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Map<java.lang.String,DataLoader<?,?>>	dataLoaders

Constructor Summary

Constructors

Constructor and Description
DataLoaderRegistry()

Method Summary

Modifier and Type	Method and Description
DataLoaderRegistry	combine(DataLoaderRegistry registry) This will combine all the current data loaders in this registry and all the data loaders from the specified registry and return a new combined registry
<K,V> DataLoader<K,V>	computeIfAbsent(java.lang.String key, java.util.function.Function<java.lang.String,DataLoader<?,?>> mappingFunction) Computes a data loader if absent or return it if it was already registered at that key.
void	dispatchAll() This will called DataLoader.dispatch() on each of the registered DataLoaders
int	dispatchAllWithCount() Similar to dispatchAll(), this calls DataLoader.dispatch() on each of the registered DataLoaders, but returns the number of dispatches.
int	dispatchDepth()
<K,V> DataLoader<K,V>	getDataLoader(java.lang.String key) Returns the dataloader that was registered under the specified key
java.util.List<DataLoader<?,?>>	getDataLoaders()
java.util.Map<java.lang.String,DataLoader<?,?>>	getDataLoadersMap()
java.util.Set<java.lang.String>	getKeys()
Statistics	getStatistics()
static DataLoaderRegistry.Builder	newRegistry()
DataLoaderRegistry	register(java.lang.String key, DataLoader<?,?> dataLoader) This will register a new dataloader
DataLoaderRegistry	unregister(java.lang.String key) This will unregister a new dataloader

Methods inherited from class java.lang.Object

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

Field Detail

dataLoaders

protected final java.util.Map<java.lang.String,DataLoader<?,?>> dataLoaders

Constructor Detail

DataLoaderRegistry

public DataLoaderRegistry()

Method Detail

register

public DataLoaderRegistry register(java.lang.String key,
                                   DataLoader<?,?> dataLoader)

This will register a new dataloader

Parameters:

key - the key to put the data loader under

dataLoader - the data loader to register

Returns:

this registry

computeIfAbsent

public <K,V> DataLoader<K,V> computeIfAbsent(java.lang.String key,
                                             java.util.function.Function<java.lang.String,DataLoader<?,?>> mappingFunction)

Computes a data loader if absent or return it if it was already registered at that key.

Note: The entire method invocation is performed atomically, so the function is applied at most once per key.

Type Parameters:

K - the type of keys

V - the type of values

Parameters:

key - the key of the data loader

mappingFunction - the function to compute a data loader

Returns:

a data loader

combine

public DataLoaderRegistry combine(DataLoaderRegistry registry)

This will combine all the current data loaders in this registry and all the data loaders from the specified registry and return a new combined registry

Parameters:

registry - the registry to combine into this registry

Returns:

a new combined registry

getDataLoaders

public java.util.List<DataLoader<?,?>> getDataLoaders()

Returns:

the currently registered data loaders

getDataLoadersMap

public java.util.Map<java.lang.String,DataLoader<?,?>> getDataLoadersMap()

Returns:

the currently registered data loaders as a map

unregister

public DataLoaderRegistry unregister(java.lang.String key)

This will unregister a new dataloader

Parameters:

key - the key of the data loader to unregister

Returns:

this registry

getDataLoader

public <K,V> DataLoader<K,V> getDataLoader(java.lang.String key)

Returns the dataloader that was registered under the specified key

Type Parameters:

K - the type of keys

V - the type of values

Parameters:

key - the key of the data loader

Returns:

a data loader or null if its not present

getKeys

public java.util.Set<java.lang.String> getKeys()

Returns:

the keys of the data loaders in this registry

dispatchAll

public void dispatchAll()

This will called DataLoader.dispatch() on each of the registered DataLoaders

dispatchAllWithCount

public int dispatchAllWithCount()

Similar to dispatchAll(), this calls DataLoader.dispatch() on each of the registered DataLoaders, but returns the number of dispatches.

Returns:

total number of entries that were dispatched from registered DataLoaders.

dispatchDepth

public int dispatchDepth()

Returns:

The sum of all batched key loads that need to be dispatched from all registered DataLoaders

getStatistics

public Statistics getStatistics()

Returns:

a combined set of statistics for all data loaders in this registry presented as the sum of all their statistics

newRegistry

public static DataLoaderRegistry.Builder newRegistry()

Returns:

A builder of DataLoaderRegistrys