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v4.5
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    v4.5

      Downloads and Exports

      This section introduces methods on a Connection object for downloading algorithm result files and exporting nodes and edges from a graphset.

      Each example focuses solely on the method's usage. For a complete code example, please refer to the full example.

      downloadAlgoResultFile()

      Downloads one result file from an algorithm task in the current graph.

      Parameters:

      • String: Name of the file.
      • String: ID of the algorithm task that generated the file.
      • DownloadFileResultListener: Listener for the download process.
      • RequestConfig (Optional): Configuration settings for the request.

      Returns:

      • Response: Result of the request.

      RequestConfig requestConfig = new RequestConfig();
      requestConfig.setGraphName("miniCircle");
      
      // Runs the Louvain algorithm in graphset 'miniCircle' and prints the task ID
      
      Response response = client.uql("algo(louvain).params({phase1_loop_num: 20, min_modularity_increase: 0.001}).write({file:{filename_community_id: 'communityID', filename_ids: 'ids', filename_num: 'num'}})", requestConfig);
      Table table = response.alias("_task").asTable();
      String taskId = (String) table.getRows().get(0).get(0);
      System.out.println("taskId = " + taskId);
      
      Thread.sleep(2000);
      
      // Downloads one file generated by the above algorithm task, prints the content in the file and prints the information of the download response
      
      Response resDownLoad = client.downloadAlgoResultFile("communityID", taskId, new DownloadFileResultListener() {
          public void onReady(String s) {
              System.out.println("Start downloading");
          }
          public void next(String filename, DownloadFileResult result) {
              System.out.println("Content of the file '" + filename + "':");
              System.out.println("-----------------------");
              System.out.println(new String(result.getBytes(), StandardCharsets.UTF_8));
              System.out.println("-----------------------");
          }
          public void onComplete(String s) {
              System.out.println("Download complete");
          }
          public void onError(String s, Throwable throwable) {
              System.out.println("Error occurred while downloading");
          }
      }, requestConfig);
      
      System.out.println("resDownLoad = " + new Gson().toJson(resDownLoad));
      

      taskId = 54228
      Content of the file 'communityID':
      -----------------------
      ULTIPA8000000000000001,94
      ...
      ULTIPA8000000000004E6E,154
      
      -----------------------
      Download complete
      resDownLoad = {"host":"192.168.1.88:60611","status":{"errorCode":"SUCCESS","msg":"","clusterInfo":{"redirect":"","leaderAddress":"","followers":[]}},"aliases":[],"items":{}}
      

      downloadAllAlgoResultFile()

      Downloads all result files from an algorithm task in the current graph.

      Parameters:

      • String: ID of the algorithm task that generated the file(s).
      • DownloadFileResultListener: Listener for the download process.
      • RequestConfig (Optional): Configuration settings for the request.

      Returns:

      • Response: Result of the request.

      RequestConfig requestConfig = new RequestConfig();
      requestConfig.setGraphName("miniCircle");
      
      // Runs the Louvain algorithm in graphset 'miniCircle' and prints the task ID
      
      Response response = client.uql("algo(louvain).params({phase1_loop_num: 20, min_modularity_increase: 0.001}).write({file:{filename_community_id: 'communityID', filename_ids: 'ids', filename_num: 'num'}})", requestConfig);
      Table table = response.alias("_task").asTable();
      String taskId = (String) table.getRows().get(0).get(0);
      System.out.println("taskId = " + taskId);
      
      Thread.sleep(2000);
      
      // Downloads all files generated by the above algorithm task, prints the content in each file and prints the information of the download response 
      
      Response resDownLoad = client.downloadAllAlgoResultFile(taskId, new DownloadFileResultListener() {
          public void onReady(String s) {
              System.out.println("Start downloading");
          }
          public void next(String filename, DownloadFileResult result) {
              System.out.println("Content of the file '" + filename + "':");
              System.out.println("-----------------------");
              System.out.println(new String(result.getBytes(), StandardCharsets.UTF_8));
              System.out.println("-----------------------");
          }
          public void onComplete(String s) {
              System.out.println("Download complete");
          }
          public void onError(String s, Throwable throwable) {
              System.out.println("Error occurred while downloading");
          }
      }, requestConfig);
      
      System.out.println("resDownLoad = " + new Gson().toJson(resDownLoad));
      

      taskId = 54229
      Content of the file 'communityID':
      -----------------------
      ULTIPA8000000000000001,137
      ...
      ULTIPA8000000000004E6E,284
      
      -----------------------
      Download complete
      Content of the file 'ids':
      -----------------------
      284,ULTIPA800000000000001A,ULTIPA8000000000000412,...
      ...
      179,ULTIPA800000000000001E,ULTIPA800000000000002B,...
      -----------------------
      Download complete
      Content of the file 'num':
      -----------------------
      284,89
      ...
      179,23
      
      -----------------------
      Download complete
      resDownLoad = {"status":{"errorCode":"SUCCESS","msg":"success"},"aliases":[],"items":{}}
      

      export()

      Exports nodes and edges from the current graph.

      Parameters:

      • ExportRequest: Configurations for the export request, including dbType:Ultipa.DBType, schema:String, limit:Integer and selectPropertiesName:List<String>.
      • ExportListener: Listener for the export process.
      • RequestConfig (Optional): Configuration settings for the request.

      Returns:

      • Response: Result of the request.

      // Exports 10 nodes of schema 'account' with selected properties in graphset 'miniCircle' and prints their information
      
      RequestConfig requestConfig = new RequestConfig();
      requestConfig.setGraphName("miniCircle");
      
      ExportRequest exportRequest = new ExportRequest();
      exportRequest.setDbType(Ultipa.DBType.DBNODE);
      exportRequest.setLimit(10);
      exportRequest.setSchema("account");
      exportRequest.setSelectPropertiesName(Arrays.asList("_id", "_uuid", "name", "year"));
      
      Response response = client.export(exportRequest, new ExportListener() {
          public void onReady() {
              System.out.println("Start downloading");
          }
          public void onError(Throwable t) {
              System.out.println("Error occurred while downloading");
          }
          public void onComplete() {
              System.out.println("Download complete");
          }
      
          public void next(ExportData result) {
              List<Node> nodes = result.getNodes();
              for (Node node : nodes) {
                  System.out.println(node.toString());
              }
          }
      }, requestConfig);
      

      Node(uuid=1, id=ULTIPA8000000000000001, schema=account, values={_id=ULTIPA8000000000000001, name=Yu78, year=1978})
      Node(uuid=2, id=ULTIPA8000000000000002, schema=account, values={_id=ULTIPA8000000000000002, name=jibber-jabber, year=1989})
      Node(uuid=3, id=ULTIPA8000000000000003, schema=account, values={_id=ULTIPA8000000000000003, name=mochaeach, year=1982})
      Node(uuid=4, id=ULTIPA8000000000000004, schema=account, values={_id=ULTIPA8000000000000004, name=Win-win0, year=2007})
      Node(uuid=5, id=ULTIPA8000000000000005, schema=account, values={_id=ULTIPA8000000000000005, name=kevinh, year=1973})
      Node(uuid=6, id=ULTIPA8000000000000006, schema=account, values={_id=ULTIPA8000000000000006, name=alexyhel, year=1974})
      Node(uuid=7, id=ULTIPA8000000000000007, schema=account, values={_id=ULTIPA8000000000000007, name=hooj, year=1986})
      Node(uuid=8, id=ULTIPA8000000000000008, schema=account, values={_id=ULTIPA8000000000000008, name=vv67, year=1990})
      Node(uuid=9, id=ULTIPA8000000000000009, schema=account, values={_id=ULTIPA8000000000000009, name=95smith, year=1988})
      Node(uuid=10, id=ULTIPA800000000000000A, schema=account, values={_id=ULTIPA800000000000000A, name=jo, year=1992})
      Download complete
      

      Full Example

      package com.ultipa.www.sdk.api;
      
      import com.google.gson.Gson;
      import com.ultipa.sdk.connect.Connection;
      import com.ultipa.sdk.connect.conf.RequestConfig;
      import com.ultipa.sdk.connect.conf.UltipaConfiguration;
      import com.ultipa.sdk.connect.driver.UltipaClientDriver;
      import com.ultipa.sdk.operate.command.listener.DownloadFileResultListener;
      import com.ultipa.sdk.operate.entity.*;
      import com.ultipa.sdk.operate.response.DownloadFileResult;
      import com.ultipa.sdk.operate.response.Response;
      import java.nio.charset.StandardCharsets;
      
      public class Main {
          public static void main(String[] args) {
              // Connection configurations
              UltipaConfiguration myConfig = UltipaConfiguration.config()
                  // URI example: .hosts("mqj4zouys.us-east-1.cloud.ultipa.com:60010")
                  .hosts("192.168.1.85:60611,192.168.1.87:60611,192.168.1.88:60611")
                  .username("<username>")
                  .password("<password>");
      
              UltipaClientDriver driver = null;
              try {
                  // Establishes connection to the database
                  driver = new UltipaClientDriver(myConfig);
                  Connection client = driver.getConnection();
      
                  Thread.sleep(3000);
                
                  RequestConfig requestConfig = new RequestConfig();
                  requestConfig.setGraphName("miniCircle");
      
                  // Runs the Louvain algorithm and prints the task ID
      
                  Response response = client.uql("algo(louvain).params({phase1_loop_num: 20, min_modularity_increase: 0.001}).write({file:{filename_community_id: 'communityID', filename_ids: 'ids', filename_num: 'num'}})", requestConfig);
                  Table table = response.alias("_task").asTable();
                  String taskId = (String) table.getRows().get(0).get(0);
                  System.out.println("taskId = " + taskId);
      
                  Thread.sleep(2000);
      
                  // Downloads all files generated by the above algorithm task, prints the content in each file and prints the information of the download response 
      
                  Response resDownLoad = client.downloadAllAlgoResultFile(taskId, new DownloadFileResultListener() {
                      public void onReady(String s) {
                          System.out.println("Start downloading");
                      }
                      public void next(String filename, DownloadFileResult result) {
                          System.out.println("Content of the file '" + filename + "':");
                          System.out.println("-----------------------");
                          System.out.println(new String(result.getBytes(), StandardCharsets.UTF_8));
                          System.out.println("-----------------------");
                      }
                      public void onComplete(String s) {
                          System.out.println("Download complete");
                      }
                      public void onError(String s, Throwable throwable) {
                          System.out.println("Error occurred while downloading");
                      }
                  }, requestConfig);
      
                  System.out.println("resDownLoad = " + new Gson().toJson(resDownLoad));
              } catch (InterruptedException e) {
                  throw new RuntimeException(e);
              } finally {
                  if (driver != null) {
                      driver.close();
                  }
              }
          }
      }
      
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