org.apache.flink.util

枚举 JavaGcCleanerWrapper

java.lang.Object

java.lang.Enum<JavaGcCleanerWrapper>

org.apache.flink.util.JavaGcCleanerWrapper

所有已实现的接口:

Serializable, Comparable<JavaGcCleanerWrapper>

public enum JavaGcCleanerWrapper
extends Enum<JavaGcCleanerWrapper>

Java GC Cleaner wrapper.

A clean operation can be wrapped with the Java GC Cleaner which will schedule this operation before GC is run for the given owner object (not reachable in user code). but only if the cleaner has not been already run explicitly by user before. If the cleaner is run after GC it will not run clean operation again. This way we guarantee that the clean operation will always run at some point but only once.

The wrapper looks up the underlying Java GC Cleaner class in different packages

方法概要

限定符和类型	方法和说明
static Runnable	create(Object owner, Runnable cleanOperation)
static JavaGcCleanerWrapper	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static JavaGcCleanerWrapper[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

方法详细资料

values

public static JavaGcCleanerWrapper[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (JavaGcCleanerWrapper c : JavaGcCleanerWrapper.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static JavaGcCleanerWrapper valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

NullPointerException - 如果参数为空值

create

public static Runnable create(Object owner,
                              Runnable cleanOperation)