程序包 com.alibaba.csp.sentinel.datasource

类 FileRefreshableDataSource<T>

java.lang.Object

com.alibaba.csp.sentinel.datasource.AbstractDataSource<String,T>

com.alibaba.csp.sentinel.datasource.AutoRefreshDataSource<String,T>

com.alibaba.csp.sentinel.datasource.FileRefreshableDataSource<T>

所有已实现的接口:

ReadableDataSource<String,T>

public class FileRefreshableDataSource<T>
extends AutoRefreshDataSource<String,T>

A ReadableDataSource based on file. This class will automatically fetches the backend file every isModified period.

Limitations: Default read buffer size is 1 MB. If file size is greater than buffer size, exceeding bytes will be ignored. Default charset is UTF-8.

作者:

Carpenter Lee, Eric Zhao

字段概要

从类继承的字段 com.alibaba.csp.sentinel.datasource.AutoRefreshDataSource

recommendRefreshMs

从类继承的字段 com.alibaba.csp.sentinel.datasource.AbstractDataSource

parser, property

构造器概要

构造器

构造器	说明
FileRefreshableDataSource(File file, Converter<String,T> configParser)	Create a file based ReadableDataSource whose read buffer size is 1MB, charset is UTF8, and read interval is 3 seconds.
FileRefreshableDataSource(File file, Converter<String,T> configParser, int bufSize)
FileRefreshableDataSource(File file, Converter<String,T> configParser, long recommendRefreshMs, int bufSize, Charset charset)
FileRefreshableDataSource(File file, Converter<String,T> configParser, Charset charset)
FileRefreshableDataSource(String fileName, Converter<String,T> configParser)

方法概要

修饰符和类型	方法	说明
void	close()	Close the data source.
protected boolean	isModified()
String	readSource()	Read original data from the data source.

从类继承的方法 com.alibaba.csp.sentinel.datasource.AbstractDataSource

getProperty, loadConfig, loadConfig

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

FileRefreshableDataSource

public FileRefreshableDataSource(File file,
 Converter<String,T> configParser)
                          throws FileNotFoundException

Create a file based ReadableDataSource whose read buffer size is 1MB, charset is UTF8, and read interval is 3 seconds.

参数:

file - the file to read

configParser - the config decoder (parser)

抛出:

FileNotFoundException

FileRefreshableDataSource

public FileRefreshableDataSource(String fileName,
 Converter<String,T> configParser)
                          throws FileNotFoundException

抛出:

FileNotFoundException

FileRefreshableDataSource

public FileRefreshableDataSource(File file,
 Converter<String,T> configParser,
 int bufSize)
                          throws FileNotFoundException

抛出:

FileNotFoundException

FileRefreshableDataSource

public FileRefreshableDataSource(File file,
 Converter<String,T> configParser,
 Charset charset)
                          throws FileNotFoundException

抛出:

FileNotFoundException

FileRefreshableDataSource

public FileRefreshableDataSource(File file,
 Converter<String,T> configParser,
 long recommendRefreshMs,
 int bufSize,
 Charset charset)
                          throws FileNotFoundException

抛出:

FileNotFoundException

方法详细资料

readSource

public String readSource()
                  throws Exception

从接口复制的说明: ReadableDataSource

Read original data from the data source.

返回:

the original data.

抛出:

Exception - IO or other error occurs

isModified

protected boolean isModified()

覆盖:

isModified 在类中 AutoRefreshDataSource<String,T>

close

public void close()
           throws Exception

从接口复制的说明: ReadableDataSource

Close the data source.

指定者:

close 在接口中 ReadableDataSource<String,T>

覆盖:

close 在类中 AutoRefreshDataSource<String,T>

抛出:

Exception - IO or other error occurs