HttpClient的連接與版本4.3.x

我試圖使用HttpClient的重用和我有麻煩破譯1.1.5. Ensuring release of low level resources意義。HttpClient的連接與版本4.3.x

這些如何關閉內容流和關閉響應被解釋？

關閉內容流：（保持底層連接活着）

CloseableHttpClient httpclient = HttpClients.createDefault(); 
try { 
    HttpGet httpget = new HttpGet("http://localhost/"); 

    // do multiple times on the same connection 
    for (...) { 
     HttpResponse response = httpclient.execute(httpget); 
     HttpEntity entity = response.getEntity(); 

     if (entity != null) { 
      try { 
       // do something useful 
      } finally { 
       EntityUtils.consume(entity); // <-- ensures reuse 
      } 
     } 
    } 
} finally { 
    httpclient.close(); 
}

關閉響應：（立即關閉並丟棄該連接）

CloseableHttpClient httpclient = HttpClients.createDefault(); 
try { 
    HttpGet httpget = new HttpGet("http://localhost/"); 

    // do multiple times on different connections 
    for (...) { 
     ClosableHttpResponse response = httpclient.execute(httpget); 
     try { 
      HttpEntity entity = response.getEntity(); 
      if (entity != null) { 
       // do something useful 
      } 
     } finally { 
      response.close(); // <-- ensures reconnect 
     } 
    } 
} finally { 
    httpclient.close(); 
}

來源

2014-04-14 antak

一般而言，一旦你與實體做要放棄它，從而使系統資源不與不再有意義的對象捆綁起來。在我看來，這裏唯一的區別就是使用。關於基本面的那一章基本上就是描述這一點。但是，如果您實施它，請確保只在需要時才使用資源。低層次的資源是在實體InputStream中，高層次資源的連接。如果您正在實現的東西，並不需要閱讀完整的InputStream以作出決定，例如，剛剛結束的響應和清理會爲您有效地進行處理。

來源

2014-04-14 17:49:56

entityUtils.consume關閉你的流...

if (entity.isStreaming()) { 
    final InputStream instream = entity.getContent(); 
    if (instream != null) { 
     instream.close(); 
    } 
}

你只是「釋放」你的客戶回池中...

然後，你應該換你的HttpClient處於可運行...

public void run() { 
    handler.sendMessage(Message.obtain(handler, HttpConnection.DID_START)); 
    CloseableHttpClient httpClient = HttpClients.custom() 
      .setConnectionManager(YourConnectionMgr.getInstance()) 
      .addInterceptorLast(new HttpRequestInterceptor() { 
       public void process(
        final HttpRequest request, 
        final HttpContext context) throws HttpException, IOException { 
        } 
       }) 
       .build(); 
} //end runnable

在endof可運行的，客戶端只得到釋放回連接池，你不要擔心資源或清理。

使用，在末尾，則擴展PoolingClientConnectionManager

newInstance = new MyConnectionManager(schemeRegistry); 
    instance.setMaxTotal(15); 
    instance.setDefaultMaxPerRoute(15); 
    HttpHost localhost = new HttpHost("api.parse.com", 443); 
    instance.setMaxPerRoute(new HttpRoute(localhost), 10);

一個經理，我想你需要關閉池。

YourConnectionMgr.getInstance().shutdown(); 
YourConnectionMgr.reset();

更多細節here

來源

2014-04-15 17:41:46

HttpClient的連接與版本4.3.x

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