org.apache.iotdb.db.writelog.io

类 SingleFileLogReader

java.lang.Object

org.apache.iotdb.db.writelog.io.SingleFileLogReader

所有已实现的接口:

ILogReader

public class SingleFileLogReader
extends Object
implements ILogReader

SingleFileLogReader reads binarized WAL logs from a file through a DataInputStream by scanning the file from head to tail.

字段概要

字段

限定符和类型	字段和说明
static int	LEAST_LOG_SIZE

构造器概要

构造器

构造器和说明
SingleFileLogReader(File logFile)

方法概要

限定符和类型	方法和说明
void	close() release resources occupied by this object, like file streams.
boolean	hasNext() return whether there exists next log to be read.
boolean	isFileCorrupted()
PhysicalPlan	next() return the next log read from media like a WAL file and covert it to a PhysicalPlan.
void	open(File logFile)

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

LEAST_LOG_SIZE

public static final int LEAST_LOG_SIZE

另请参阅:

常量字段值

构造器详细资料

SingleFileLogReader

public SingleFileLogReader(File logFile)
                    throws FileNotFoundException

抛出:

FileNotFoundException

方法详细资料

hasNext

public boolean hasNext()

从接口复制的说明: ILogReader

return whether there exists next log to be read.

指定者:

hasNext 在接口中 ILogReader

返回:

whether there exists next log to be read.

next

public PhysicalPlan next()

从接口复制的说明: ILogReader

return the next log read from media like a WAL file and covert it to a PhysicalPlan.

指定者:

next 在接口中 ILogReader

返回:

the next log as a PhysicalPlan

close

public void close()

从接口复制的说明: ILogReader

release resources occupied by this object, like file streams.

指定者:

close 在接口中 ILogReader

open

public void open(File logFile)
          throws FileNotFoundException

抛出:

FileNotFoundException

isFileCorrupted

public boolean isFileCorrupted()