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POReading data from an API
 

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    <p>I have written a function to read some data from an external API. What my function does is , it calls that API while reading a file from the disk. I want to optimize my code for large size of a file (35000 records). Could you please suggest me on this. </p> <p>Following is my code. </p> <pre><code>public void readCSVFile() { try { br = new BufferedReader(new FileReader(getFileName())); while ((line = br.readLine()) != null) { String[] splitLine = line.split(cvsSplitBy); String campaign = splitLine[0]; String adGroup = splitLine[1]; String url = splitLine[2]; long searchCount = getSearchCount(url); StringBuilder sb = new StringBuilder(); sb.append(campaign + ","); sb.append(adGroup + ","); sb.append(searchCount + ","); writeToFile(sb, getNewFileName()); } } catch (Exception e) { e.printStackTrace(); } } private long getSearchCount(String url) { long recordCount = 0; try { DefaultHttpClient httpClient = new DefaultHttpClient(); HttpGet getRequest = new HttpGet( "api.com/querysearch?q=" + url); getRequest.addHeader("accept", "application/json"); HttpResponse response = httpClient.execute(getRequest); if (response.getStatusLine().getStatusCode() != 200) { throw new RuntimeException("Failed : HTTP error code : " + response.getStatusLine().getStatusCode()); } BufferedReader br = new BufferedReader(new InputStreamReader( (response.getEntity().getContent()))); String output; while ((output = br.readLine()) != null) { try { JSONObject json = (JSONObject) new JSONParser() .parse(output); JSONObject result = (JSONObject) json.get("result"); recordCount = (long) result.get("count"); System.out.println(url + "=" + recordCount); } catch (Exception e) { System.out.println(e.getMessage()); } } httpClient.getConnectionManager().shutdown(); } catch (Exception e) { e.getStackTrace(); } return recordCount; } </code></pre>
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    1. COYour bottleneck is definitely going to be your HTTP stuff. I would to optimize this. Maybe not shut down connections or get bulk results if possible.
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    2. COYes problem is there. Issue is , I have to call this API with a GET parameter which comes from a file.
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