org.rocksdb

类 AbstractNativeReference

java.lang.Object

org.rocksdb.AbstractNativeReference

所有已实现的接口:

java.lang.AutoCloseable

直接已知子类:

AbstractImmutableNativeReference, RocksMutableObject

public abstract class AbstractNativeReference
extends java.lang.Object
implements java.lang.AutoCloseable

AbstractNativeReference is the base-class of all RocksDB classes that have a pointer to a native C++ rocksdb object.

AbstractNativeReference has the close() method, which frees its associated C++ object.

This function should be called manually, or even better, called implicitly using a try-with-resources statement, when you are finished with the object. It is no longer called automatically during the regular Java GC process via finalization Object.finalize().

which is deprecated from Java 9.

Explanatory note - When or if the Garbage Collector calls Object.finalize() depends on the JVM implementation and system conditions, which the programmer cannot control. In addition, the GC cannot see through the native reference long member variable (which is the C++ pointer value to the native object), and cannot know what other resources depend on it.

构造器概要

构造器

构造器和说明
AbstractNativeReference()

方法概要

限定符和类型	方法和说明
abstract void	close() Frees the underlying C++ object It is strong recommended that the developer calls this after they have finished using the object.
protected abstract boolean	isOwningHandle() Returns true if we are responsible for freeing the underlying C++ object

从类继承的方法 java.lang.Object

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

构造器详细资料

AbstractNativeReference

public AbstractNativeReference()

方法详细资料

isOwningHandle

protected abstract boolean isOwningHandle()

Returns true if we are responsible for freeing the underlying C++ object

返回:

true if we are responsible to free the C++ object

close

public abstract void close()

Frees the underlying C++ object

It is strong recommended that the developer calls this after they have finished using the object.

Note, that once an instance of AbstractNativeReference has been closed, calling any of its functions will lead to undefined behavior.

指定者:

close 在接口中 java.lang.AutoCloseable