com.alibaba.csp.sentinel.util

Class SpiLoader

java.lang.Object

com.alibaba.csp.sentinel.util.SpiLoader

public final class SpiLoader
extends Object

Since:

1.4.0

Author:

Eric Zhao

Method Summary

Modifier and Type	Method and Description
static <T> T	loadFirstInstance(Class<T> clazz) Load the first-found specific SPI instance
static <T> T	loadFirstInstanceOrDefault(Class<T> clazz, Class<? extends T> defaultClass) Load the first-found specific SPI instance (excluding provided default SPI class).
static <T> T	loadHighestPriorityInstance(Class<T> clazz) Load the SPI instance with highest priority.
static <T> List<T>	loadInstanceList(Class<T> clazz) Load and sorted SPI instance list.
static <T> List<T>	loadInstanceListSorted(Class<T> clazz) Load the sorted SPI instance list for provided SPI interface.
static <T> List<T>	loadPrototypeInstanceListSorted(Class<T> clazz) Load the sorted and prototype SPI instance list for provided SPI interface.

Methods inherited from class java.lang.Object

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

Method Detail

loadFirstInstance

public static <T> T loadFirstInstance(Class<T> clazz)

Load the first-found specific SPI instance

Type Parameters:

T - SPI type

Parameters:

clazz - class of the SPI interface

Returns:

the first specific SPI instance if exists, or else return null

Since:

1.7.0

loadFirstInstanceOrDefault

public static <T> T loadFirstInstanceOrDefault(Class<T> clazz,
                                               Class<? extends T> defaultClass)

Load the first-found specific SPI instance (excluding provided default SPI class). If no other SPI implementation found, then create a default SPI instance.

Type Parameters:

T - SPI type

Parameters:

clazz - class of the SPI interface

defaultClass - class of the default SPI implementation (if no other implementation found)

Returns:

the first specific SPI instance if exists, or else the default SPI instance

Since:

1.7.0

loadHighestPriorityInstance

public static <T> T loadHighestPriorityInstance(Class<T> clazz)

Load the SPI instance with highest priority. Note: each call return same instances.

Type Parameters:

T - SPI type

Parameters:

clazz - class of the SPI

Returns:

the SPI instance with highest priority if exists, or else false

Since:

1.6.0

loadInstanceList

public static <T> List<T> loadInstanceList(Class<T> clazz)

Load and sorted SPI instance list. Load the SPI instance list for provided SPI interface. Note: each call return same instances.

Type Parameters:

T - SPI type

Parameters:

clazz - class of the SPI

Returns:

sorted SPI instance list

Since:

1.6.0

loadInstanceListSorted

public static <T> List<T> loadInstanceListSorted(Class<T> clazz)

Load the sorted SPI instance list for provided SPI interface. Note: each call return same instances.

Type Parameters:

T - SPI type

Parameters:

clazz - class of the SPI

Returns:

sorted SPI instance list

Since:

1.6.0

loadPrototypeInstanceListSorted

public static <T> List<T> loadPrototypeInstanceListSorted(Class<T> clazz)

Load the sorted and prototype SPI instance list for provided SPI interface. Note: each call return different instances, i.e. prototype instance, not singleton instance.

Type Parameters:

T - SPI type

Parameters:

clazz - class of the SPI

Returns:

sorted and different SPI instance list

Since:

1.7.2