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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?
我非常頻繁地(> = 1 /秒)對API端點進行HTTP POST,我想確保我有效地進行。 我的目標是盡快成功或失敗,特別是因為我有單獨的代碼來重試失敗的POST。 有一個很好的HttpClient性能提示頁面,但我不確定是否詳盡地實現它們都會帶來真正的好處。 這是我現在的代碼:
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;
}
}
禁用對陳舊連接的檢查是否有意義? 我應該考慮使用MultiThreadedConnectionManager嗎? 當然,實際的基准測試會有所幫助,但我想先檢查一下我的代碼是否在正確的軌道上。
http連接的大部分性能都是建立套接字連接。 您可以通過使用“keep-alive”http連接來避免這種情況。 要做到這一點,最好使用HTTP 1.1並確保始終在請求和響應中設置“Content-Length:xx”,在適當時正確設置“Connecction:close”,並在收到時正確處理。
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