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[英]How can I reuse same HttpClient Connection in my Single threaded Java Client Application?
[英]How can I reuse a HttpClient connection efficiently?
我非常频繁地(> = 1 /秒)对API端点进行HTTP POST,我想确保我有效地进行。 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。 有一个很好的HttpClient性能提示页面,但我不确定是否详尽地实现它们都会带来真正的好处。 这是我现在的代码:
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;
}
}
禁用对陈旧连接的检查是否有意义? 我应该考虑使用MultiThreadedConnectionManager吗? 当然,实际的基准测试会有所帮助,但我想先检查一下我的代码是否在正确的轨道上。
http连接的大部分性能都是建立套接字连接。 您可以通过使用“keep-alive”http连接来避免这种情况。 要做到这一点,最好使用HTTP 1.1并确保始终在请求和响应中设置“Content-Length:xx”,在适当时正确设置“Connecction:close”,并在收到时正确处理。
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