程序包 cn.taketoday.context.loader

类 CandidateComponentsIndexLoader

java.lang.Object

cn.taketoday.context.loader.CandidateComponentsIndexLoader

public final class CandidateComponentsIndexLoader
extends Object

Candidate components index loading mechanism for internal use within the framework.

从以下版本开始:

4.0 2021/12/9 21:35

作者:

Stephane Nicoll, Harry Yang

字段概要

字段

修饰符和类型	字段	说明
static final String	COMPONENTS_RESOURCE_LOCATION	The location to look for components.
static final String	IGNORE_INDEX	System property that instructs framework to ignore the components index, i.e.

方法概要

修饰符和类型	方法	说明
static CandidateComponentsIndex	loadIndex(ClassLoader classLoader)	Load and instantiate the CandidateComponentsIndex from "META-INF/today.components", using the given class loader.

从类继承的方法 java.lang.Object

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

字段详细资料

COMPONENTS_RESOURCE_LOCATION

public static final String COMPONENTS_RESOURCE_LOCATION

The location to look for components.

Can be present in multiple JAR files.

另请参阅:

• 常量字段值

IGNORE_INDEX

public static final String IGNORE_INDEX

System property that instructs framework to ignore the components index, i.e. to always return null from loadIndex(ClassLoader).

The default is "false", allowing for regular use of the index. Switching this flag to true fulfills a corner case scenario when an index is partially available for some libraries (or use cases) but couldn't be built for the whole application. In this case, the application context fallbacks to a regular classpath arrangement (i.e. as though no index were present at all).

另请参阅:

• 常量字段值

方法详细资料

loadIndex

@Nullable
public static CandidateComponentsIndex loadIndex(@Nullable
 ClassLoader classLoader)

Load and instantiate the CandidateComponentsIndex from "META-INF/today.components", using the given class loader. If no index is available, return null.

参数:

classLoader - the ClassLoader to use for loading (can be null to use the default)

返回:

the index to use or null if no index was found

抛出:

IllegalArgumentException - if any module index cannot be loaded or if an error occurs while creating CandidateComponentsIndex