2010-02-10 42 views
12

我正在非常频繁地(> = 1 /秒)对API端点进行HTTP POST,我想确保我正在有效地进行操作。我的目标是尽快成功或失败,特别是因为我有单独的代码来重试失败的POST。有一个不错的页面HttpClient performance tips,但我不确定是否全面实施它们都会带来真正的好处。这里是我的代码现在:如何有效地重用HttpClient连接?

public class Poster { 
    private String url; 
    // re-use our request 
    private HttpClient client; 
    // re-use our method 
    private PostMethod method; 

    public Poster(String url) { 
    this.url = url; 

    // Set up the request for reuse. 
    HttpClientParams clientParams = new HttpClientParams(); 
    clientParams.setSoTimeout(1000); // 1 second timeout. 
    this.client = new HttpClient(clientParams); 
    // don't check for stale connections, since we want to be as fast as possible? 
    // this.client.getParams().setParameter("http.connection.stalecheck", false); 

    this.method = new PostMethod(this.url); 
    // custom RetryHandler to prevent retry attempts 
    HttpMethodRetryHandler myretryhandler = new HttpMethodRetryHandler() { 
     public boolean retryMethod(final HttpMethod method, final IOException exception, int executionCount) { 
     // For now, never retry 
     return false; 
     } 
    }; 

    this.method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, myretryhandler); 
    } 

    protected boolean sendData(SensorData data) { 
    NameValuePair[] payload = { 
     // ... 
    }; 
    method.setRequestBody(payload); 

    // Execute it and get the results. 
    try { 
     // Execute the POST method. 
     client.executeMethod(method); 
    } catch (IOException e) { 
     // unable to POST, deal with consequences here 
     method.releaseConnection(); 
     return false; 
    } 

    // don't release so that it can be reused? 
    method.releaseConnection(); 

    return method.getStatusCode() == HttpStatus.SC_OK; 
    } 
} 

是否有意义,禁用旧的连接检查?我应该看看使用MultiThreadedConnectionManager?当然,实际的基准测试会有所帮助,但我想检查我的代码是否在正确的轨道上。

+4

尽管没有答案,但我赢得了热门问题徽章(1000多个视图),这很具有讽刺意味。如果你有一些建议,回答这个问题可能是赢得声誉的好方法。 ;-) – pr1001

+0

https://hc.apache.org/httpcomponents-client-ga/tutorial/html/connmgmt.html –

回答

5

http连接的大部分性能命中是建立套接字连接。你可以通过使用'keep-alive'http连接来避免这种情况。为此,最好使用HTTP 1.1并确保在请求和响应中始终设置“Content-Length:xx”,并在适当时正确设置“Connecction:close”,并在收到时正确采取行动。