Batch Results Retrieval in Java

 1 ////////////////////////////////////////////////////////////////////////////
 2 //
 3 //  Example client to submit a batch request to TextServer 
 4 // SERVICENAME service, and wait for the job to be finished.
 5 //
 6 //  Input must be a ZIP file containing one or more text files to analyze
 7 //  Output will be a ZIP file containing results for each input file in
 8 // the requested format (XML, json, conll)
 9 //
10 ////////////////////////////////////////////////////////////////////////////
11 
12 
13 import org.apache.http.client.HttpClient;
14 import org.apache.http.HttpResponse;
15 import org.apache.http.HttpStatus;
16 import org.apache.http.entity.mime.content.FileBody;
17    
18 import org.apache.http.client.methods.HttpPost;
19 import org.apache.http.entity.mime.MultipartEntityBuilder;
20 import org.apache.http.impl.client.HttpClientBuilder;
21 import org.apache.http.util.EntityUtils;
22 
23 import java.io.File;
24 import java.io.InputStream;
25 import java.io.FileOutputStream;
26 
27 public class RetrieveResults {
28     
29     // service base URL
30     static final String textServer_URL = "http://frodo.lsi.upc.edu:8080/TextWS/textservlet/ws";
31     
32     public static void main(String[] args) throws Exception {
33 
34         // Get request parameters
35         System.out.print("TextServer Username: ");
36         String user = System.console().readLine();
37         System.out.print("TextServer Job Token ID: ");
38         String tokenID = System.console().readLine();
39         System.out.print("Output ZIP file: ");
40         String outfname = System.console().readLine();
41        
42 
43         // prepare request to poll for completion and retrieve results
44         request = new HttpPost(textServer_URL+"/resultRetrieve");
45         request.setEntity(MultipartEntityBuilder
46                           .create()
47                           .addTextBody("username", user)
48                           .addTextBody("tokenID", tokenID)
49                           .build() );
50     
51         System.out.println("Polling server for job completion");
52         response = client.execute(request);
53         content = EntityUtils.toString(response.getEntity());
54             
55         // we got an error code, lets see which one
56         if (response.getStatusLine().getStatusCode()==HttpStatus.SC_SERVICE_UNAVAILABLE &&
57             content.substring(0,8).equals("[TS-125]") ) {
58             // SC=503 and TS_code=TS-125 mean job is not finished. keep waiting
59             System.out.println("Job not finished yet.");
60             System.exit(0);
61         }
62         else if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
63             // some unexpected error happened
64             System.out.println(content);
65             System.exit(1);
66         }
67 
68         // No errors, we got response.
69         // write the received ZIP result to output file
70         InputStream sin = response.getEntity().getContent();
71         byte data[] = new byte[sin.available()];
72         sin.read(data);
73 
74         FileOutputStream outf = new FileOutputStream(outfname);
75         outf.write(data); 
76         outf.close();
77 
78         System.out.println("Job finished. Results saved to "+outfname);
79     }
80 }