cn.trinea.android.common.service

类 HttpCache

java.lang.Object

cn.trinea.android.common.service.HttpCache

public class HttpCache
extends Object

Http Cache

It applies to get and cache api data from server, like json or xml and so on. It applies to apps like weixin, weibo, twitter, taobao and so on. If want to cache image, please use ImageCache

Constructor
• HttpCache(Context) to init cache

Get data asynchronous
• httpGet(HttpRequest, HttpCacheListener)
• httpGet(String, HttpCacheListener)

Get data synchronous
• httpGet(HttpRequest)
• httpGet(String)
• httpGetString(HttpRequest)
• httpGetString(String)

作者:

Trinea 2013-11-1

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	HttpCache.HttpCacheListener HttpCacheListener, can do something before or after HttpGet

字段概要

字段

限定符和类型	字段和说明
static Executor	THREAD_POOL_EXECUTOR Default Executor that be used to execute tasks in parallel.

构造器概要

构造器

构造器和说明
HttpCache(android.content.Context context)

方法概要

方法

限定符和类型	方法和说明
void	clear() Removes all elements from this cache, leaving it empty.
boolean	containsKey(String url) whether this cache contains the specified url.
HttpResponse	getFromCache(String url) get from memory cache first, if not exist in memory cache, get from db
HttpResponse	httpGet(HttpRequest request) http get Attentions: Don't call this on the ui thread, it may costs some times.
void	httpGet(HttpRequest request, HttpCache.HttpCacheListener listener) http get It gets data from cache or network asynchronous.
HttpResponse	httpGet(String url) http get Attentions: Don't call this on the ui thread, it may costs some times.
void	httpGet(String url, HttpCache.HttpCacheListener listener) http get It gets data from cache or network asynchronous.
HttpResponse	httpGetString(HttpRequest httpRequest) http get Attentions: Don't call this on the ui thread, it may costs some times.
String	httpGetString(String url) http get Attentions: Don't call this on the ui thread, it may costs some times.
protected boolean	isExpired(String url) whether the element of the specified url has invalided

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

THREAD_POOL_EXECUTOR

public static final Executor THREAD_POOL_EXECUTOR

Default Executor that be used to execute tasks in parallel.

构造器详细资料

HttpCache

public HttpCache(android.content.Context context)

方法详细资料

httpGet

public HttpResponse httpGet(HttpRequest request)

http get

Attentions:
• Don't call this on the ui thread, it may costs some times. Becaust if not in cache, it get from network synchronous.
• If you want get data asynchronous, use httpGet(HttpRequest, HttpCacheListener)

参数:

httpRequest -

返回:

the response of the url, if null represents http error

httpGet

public void httpGet(String url,
           HttpCache.HttpCacheListener listener)

http get

• It gets data from cache or network asynchronous.
• If you want get data synchronous, use httpGet(HttpRequest) or httpGetString(HttpRequest)

参数:

url -

listener - listener which can do something before or after HttpGet. this can be null if you not want to do something

httpGet

public void httpGet(HttpRequest request,
           HttpCache.HttpCacheListener listener)

http get

• It gets data from cache or network asynchronous.
• If you want get data synchronous, use httpGet(HttpRequest) or httpGetString(HttpRequest)

参数:

request -

listener - listener which can do something before or after HttpGet. this can be null if you not want to do something

httpGet

public HttpResponse httpGet(String url)

http get

Attentions:
• Don't call this on the ui thread, it may costs some times. Becaust if not in cache, it get from network synchronous.
• If you want get data asynchronous, use httpGet(HttpRequest, HttpCacheListener)

参数:

url -

返回:

the response of the url, if null represents http error

httpGetString

public String httpGetString(String url)

http get

Attentions:
• Don't call this on the ui thread, it may costs some times. Becaust if not in cache, it get from network synchronous.
• If you want get data asynchronous, use httpGet(String, HttpCacheListener)

参数:

url -

返回:

the response body of the url, if null represents http error

httpGetString

public HttpResponse httpGetString(HttpRequest httpRequest)

http get

Attentions:
• Don't call this on the ui thread, it may costs some times. Becaust if not in cache, it get from network synchronous.
• If you want get data asynchronous, use httpGet(HttpRequest, HttpCacheListener)

参数:

httpRequest -

返回:

the response body of the url, if null represents http error

containsKey

public boolean containsKey(String url)

whether this cache contains the specified url.

参数:

url -

返回:

true if this cache contains the specified url and the element is valid, false otherwise.

isExpired

protected boolean isExpired(String url)

whether the element of the specified url has invalided

参数:

url -

返回:

true if the element of the specified url has invalided, false otherwise.

clear

public void clear()

Removes all elements from this cache, leaving it empty.

getFromCache

public HttpResponse getFromCache(String url)

get from memory cache first, if not exist in memory cache, get from db

参数:

url -

返回:

• if neither exit in memory cache nor db, return null
• if is expired, return null, otherwise return cache response