com.alipay.sofa.jraft.storage.snapshot.local

类 SnapshotFileReader

java.lang.Object

com.alipay.sofa.jraft.storage.io.LocalDirReader

com.alipay.sofa.jraft.storage.snapshot.local.SnapshotFileReader

所有已实现的接口:

FileReader

public class SnapshotFileReader
extends LocalDirReader

Snapshot file reader

作者:

boyan (boyan@alibaba-inc.com) 2018-Mar-13 2:03:09 PM

字段概要

从接口继承的字段 com.alipay.sofa.jraft.storage.io.FileReader

EOF

构造器概要

构造器

构造器和说明
SnapshotFileReader(String path, SnapshotThrottle snapshotThrottle)

方法概要

限定符和类型	方法和说明
LocalSnapshotMetaTable	getMetaTable()
boolean	open()
int	readFile(ByteBufferCollector metaBufferCollector, String fileName, long offset, long maxCount) Read file into buf starts from offset at most maxCount.
void	setMetaTable(LocalSnapshotMetaTable metaTable)

从类继承的方法 com.alipay.sofa.jraft.storage.io.LocalDirReader

getPath, readFileWithMeta

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

SnapshotFileReader

public SnapshotFileReader(String path,
                          SnapshotThrottle snapshotThrottle)

方法详细资料

getMetaTable

public LocalSnapshotMetaTable getMetaTable()

setMetaTable

public void setMetaTable(LocalSnapshotMetaTable metaTable)

open

public boolean open()

readFile

public int readFile(ByteBufferCollector metaBufferCollector,
                    String fileName,
                    long offset,
                    long maxCount)
             throws IOException,
                    RetryAgainException

从接口复制的说明: FileReader

Read file into buf starts from offset at most maxCount.

指定者:

readFile 在接口中 FileReader

覆盖:

readFile 在类中 LocalDirReader

参数:

metaBufferCollector - read bytes into this buf

fileName - file name

offset - the offset of file

maxCount - max read bytes

返回:

-1 if reaches end, else return read count.

抛出:

IOException - if some I/O error occurs

RetryAgainException - if it's not allowed to read partly or it's allowed but throughput is throttled to 0, try again.