FileSourceAppComponent

Required to implement a file-source component. File source reads a file from a remote source such as a remote file system (FTP) or a URL

Source: Github

Example:

package my.org.components;

import io.dexi.service.AppContext;
import io.dexi.service.components.AppComponent;
import io.dexi.service.components.FileSourceAppComponent;
import io.dexi.service.exceptions.UserErrorException;
import org.apache.commons.io.IOUtils;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

@AppComponent("read-file-from-my-app")
public class MyAppFileSourceAppComponent implements FileSourceAppComponent<MyAppConfig, MyComponentConfig> {

    @Override
    public void read(AppContext<MyAppConfig, MyComponentConfig> ctxt, HttpServletResponse response) {
        File file = new File("some-file.txt");
        try (InputStream in = new FileInputStream(file)) {
            IOUtils.copyLarge(in, response.getOutputStream());
        } catch (IOException e) {
            throw new UserErrorException("Failed to read file" ,e );
        }
    }

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

components:
- name: read-file-from-my-app
  type: file-source
  title: Read a file from my app
  specification:
    endpoint: # Will invoke MyAppFileSourceAppComponent::read
      url: "${baseUrl}/dexi/file/source/read"
      method: POST