FileParserAppComponent

Required to implement a file-parser component. File parsers parses an input stream of a file and returns structured data as a result. This can be used to parse all sorts of images such as applying machine learning to a file and return the results - or parsing a CSV file and producing the rows as structured output.

Source: Github

Example:

package my.org.components;

import io.dexi.service.AppContext;
import io.dexi.service.components.AppComponent;
import io.dexi.service.components.FileParserAppComponent;
import io.dexi.service.exceptions.UserErrorException;
import io.dexi.service.utils.ResultStream;
import org.apache.commons.io.IOUtils;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

@AppComponent("parse-file-with-my-app")
public class MyAppFileParserAppComponent implements FileParserAppComponent<MyAppConfig, MyComponentConfig> {

    @Override
    public Class<MyComponentConfig> getComponentConfigClass() {
        return MyComponentConfig.class;
    }

    @Override
    public void parse(AppContext<MyAppConfig, MyComponentConfig> ctxt, HttpServletRequest request, ResultStream resultStream) {

        try (InputStream in = request.getInputStream()) {
          	//Implement parsing of input stream here
          	resultStream.append(myResult);

        } catch (IOException e) {
            throw new UserErrorException("Failed to parse data from input stream" , e);
        }
    }
}

components:
- name: parse-file-with-my-app
  type: file-parser
  title: Parse file using my app
  specification:
    endpoint: # Will invoke MyAppFileParserAppComponent::parse
      url: "${baseUrl}/dexi/file/parse"
      method: POST
    outputs:
    	rowIndex:
      	title: Row Index
      	type: number
      rowValue:
      	title: Row Value
        type: string