org.apache.flink.runtime.io.disk.iomanager

类 AbstractFileIOChannel

java.lang.Object

org.apache.flink.runtime.io.disk.iomanager.AbstractFileIOChannel

所有已实现的接口:

FileIOChannel

直接已知子类:

AsynchronousFileIOChannel, SynchronousFileIOChannel

public abstract class AbstractFileIOChannel
extends Object
implements FileIOChannel

嵌套类概要

从接口继承的嵌套类/接口 org.apache.flink.runtime.io.disk.iomanager.FileIOChannel

FileIOChannel.Enumerator, FileIOChannel.ID

字段概要

字段

限定符和类型	字段和说明
protected FileChannel	fileChannel A file channel for NIO access to the file.
protected FileIOChannel.ID	id The ID of the underlying channel.
protected static org.slf4j.Logger	LOG Logger object for channel and its subclasses

构造器概要

构造器

限定符	构造器和说明
protected	AbstractFileIOChannel(FileIOChannel.ID channelID, boolean writeEnabled) Creates a new channel to the path indicated by the given ID.

方法概要

限定符和类型	方法和说明
abstract void	close() Closes the channel.
void	closeAndDelete() Closes the channel and deletes the underlying file.
void	deleteChannel() Deletes the file underlying this I/O channel.
FileIOChannel.ID	getChannelID() Gets the channel ID of this I/O channel.
FileChannel	getNioFileChannel()
long	getSize() Gets the size (in bytes) of the file underlying the channel.
abstract boolean	isClosed() Checks whether the channel has been closed.

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

LOG

protected static final org.slf4j.Logger LOG

Logger object for channel and its subclasses

id

protected final FileIOChannel.ID id

The ID of the underlying channel.

fileChannel

protected final FileChannel fileChannel

A file channel for NIO access to the file.

构造器详细资料

AbstractFileIOChannel

protected AbstractFileIOChannel(FileIOChannel.ID channelID,
                                boolean writeEnabled)
                         throws IOException

Creates a new channel to the path indicated by the given ID. The channel hands IO requests to the given request queue to be processed.

参数:

channelID - The id describing the path of the file that the channel accessed.

writeEnabled - Flag describing whether the channel should be opened in read/write mode, rather than in read-only mode.

抛出:

IOException - Thrown, if the channel could no be opened.

方法详细资料

getChannelID

public final FileIOChannel.ID getChannelID()

从接口复制的说明: FileIOChannel

Gets the channel ID of this I/O channel.

指定者:

getChannelID 在接口中 FileIOChannel

返回:

The channel ID.

getSize

public long getSize()
             throws IOException

从接口复制的说明: FileIOChannel

Gets the size (in bytes) of the file underlying the channel.

指定者:

getSize 在接口中 FileIOChannel

抛出:

IOException

isClosed

public abstract boolean isClosed()

从接口复制的说明: FileIOChannel

Checks whether the channel has been closed.

指定者:

isClosed 在接口中 FileIOChannel

返回:

True if the channel has been closed, false otherwise.

close

public abstract void close()
                    throws IOException

从接口复制的说明: FileIOChannel

Closes the channel. For asynchronous implementations, this method waits until all pending requests are handled. Even if an exception interrupts the closing, the underlying FileChannel is closed.

指定者:

close 在接口中 FileIOChannel

抛出:

IOException - Thrown, if an error occurred while waiting for pending requests.

deleteChannel

public void deleteChannel()

从接口复制的说明: FileIOChannel

Deletes the file underlying this I/O channel.

指定者:

deleteChannel 在接口中 FileIOChannel

closeAndDelete

public void closeAndDelete()
                    throws IOException

从接口复制的说明: FileIOChannel

Closes the channel and deletes the underlying file. For asynchronous implementations, this method waits until all pending requests are handled.

指定者:

closeAndDelete 在接口中 FileIOChannel

抛出:

IOException - Thrown, if an error occurred while waiting for pending requests.

getNioFileChannel

public FileChannel getNioFileChannel()

指定者:

getNioFileChannel 在接口中 FileIOChannel