com.qiniu.android.http

Class DnsPrefetcher

java.lang.Object

com.qiniu.android.http.DnsPrefetcher

public class DnsPrefetcher
extends java.lang.Object

Created by jemy on 2019/8/20.

Field Summary

Fields

Modifier and Type	Field and Description
static DnsPrefetcher	dnsPrefetcher
static java.lang.String	target_region_id

Method Summary

Modifier and Type	Method and Description
static boolean	checkRePrefetchDns(java.lang.String token, Configuration config) ip changed, the network has changed ak:scope变化，prequery（v2）自动获取域名接口发生变化，存储区域可能变化 cacheTime>config.cacheTime（默认24H）
void	dnsPreByCustom(Dns dns) 自定义dns预取
java.util.concurrent.ConcurrentHashMap<java.lang.String,java.util.List<java.net.InetAddress>>	getConcurrentHashMap()
static DnsPrefetcher	getDnsPrefetcher()
java.util.List<java.net.InetAddress>	getInetAddressByHost(java.lang.String host)
java.util.List<ZoneInfo>	getLocalZone() look local host
ZoneInfo	getPreQueryZone() query host sync
DnsPrefetcher	init(java.lang.String token, Configuration config)
void	localFetch() 不用判断是否预取，每次调用UploadManager都直接预取一次。 uploadManager只会new一次，但是uploadManager.put方法有多次，如果期间网络发生变化 这个方法预取的结果应该被ConcurrentHashMap自动覆盖
static boolean	recoverCache(Configuration config) uploadManager初始化时，加载本地缓存到内存
static boolean	recoverDnsCache(byte[] data)
void	setConcurrentHashMap(java.util.concurrent.ConcurrentHashMap<java.lang.String,java.util.List<java.net.InetAddress>> mConcurrentHashMap)
void	setToken(java.lang.String token)
static void	startPrefetchDns(java.lang.String token, Configuration config) start preFetchDns: Time-consuming operation, in a thread

Methods inherited from class java.lang.Object

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

Field Detail

dnsPrefetcher

public static DnsPrefetcher dnsPrefetcher

target_region_id

public static java.lang.String target_region_id

Method Detail

getDnsPrefetcher

public static DnsPrefetcher getDnsPrefetcher()

localFetch

public void localFetch()

不用判断是否预取，每次调用UploadManager都直接预取一次。 uploadManager只会new一次，但是uploadManager.put方法有多次，如果期间网络发生变化 这个方法预取的结果应该被ConcurrentHashMap自动覆盖

init

public DnsPrefetcher init(java.lang.String token,
                          Configuration config)
                   throws java.net.UnknownHostException

Throws:

java.net.UnknownHostException

setConcurrentHashMap

public void setConcurrentHashMap(java.util.concurrent.ConcurrentHashMap<java.lang.String,java.util.List<java.net.InetAddress>> mConcurrentHashMap)

getConcurrentHashMap

public java.util.concurrent.ConcurrentHashMap<java.lang.String,java.util.List<java.net.InetAddress>> getConcurrentHashMap()

setToken

public void setToken(java.lang.String token)

getInetAddressByHost

public java.util.List<java.net.InetAddress> getInetAddressByHost(java.lang.String host)

dnsPreByCustom

public void dnsPreByCustom(Dns dns)

自定义dns预取

Parameters:

dns -

Throws:

java.net.UnknownHostException

getLocalZone

public java.util.List<ZoneInfo> getLocalZone()

look local host

getPreQueryZone

public ZoneInfo getPreQueryZone()

query host sync

checkRePrefetchDns

public static boolean checkRePrefetchDns(java.lang.String token,
                                         Configuration config)

ip changed, the network has changed ak:scope变化，prequery（v2）自动获取域名接口发生变化，存储区域可能变化 cacheTime>config.cacheTime（默认24H）

Returns:

true:重新预期并缓存, false:不需要重新预取和缓存

recoverCache

public static boolean recoverCache(Configuration config)

uploadManager初始化时，加载本地缓存到内存

Parameters:

config -

Returns:

如果不存在缓存返回true，需要重新预取；如果存在且满足使用，返回false

startPrefetchDns

public static void startPrefetchDns(java.lang.String token,
                                    Configuration config)

start preFetchDns: Time-consuming operation, in a thread

Parameters:

token -

recoverDnsCache

public static boolean recoverDnsCache(byte[] data)

Parameters:

data -

Returns: