Java tutorial
package apiserver.services.images.controllers.filters; /******************************************************************************* Copyright (c) 2013 Mike Nimer. This file is part of ApiServer Project. The ApiServer Project is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. The ApiServer Project is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with the ApiServer Project. If not, see <http://www.gnu.org/licenses/>. ******************************************************************************/ import apiserver.MimeType; import apiserver.core.FileUploadHelper; import apiserver.core.common.ResponseEntityHelper; import apiserver.model.Document; import apiserver.services.images.gateways.filters.ApiImageFilterGaussianGateway; import apiserver.services.images.gateways.jobs.ImageDocumentJob; import apiserver.services.images.gateways.jobs.filters.GaussianJob; import com.wordnik.swagger.annotations.Api; import com.wordnik.swagger.annotations.ApiOperation; import com.wordnik.swagger.annotations.ApiParam; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.http.HttpStatus; import org.springframework.http.ResponseEntity; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.multipart.MultipartFile; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.awt.image.BufferedImage; import java.io.IOException; import java.util.Map; import java.util.concurrent.ExecutionException; import java.util.concurrent.Future; import java.util.concurrent.TimeUnit; import java.util.concurrent.TimeoutException; /** * User: mikenimer * Date: 9/16/13 */ @Controller @RestController @Api(value = "/api/image", description = "[IMAGE]") @RequestMapping("/api/image") public class GaussianController { public final Log log = LogFactory.getLog(this.getClass()); @Autowired private FileUploadHelper fileUploadHelper; @Autowired private ApiImageFilterGaussianGateway imageFilterGaussianGateway; private @Value("${defaultReplyTimeout}") Integer defaultTimeout; /** * This filter performs a Gaussian blur on an uploaded image. * * @param documentId * @param radius * @param format * @return * @throws java.util.concurrent.TimeoutException * @throws java.util.concurrent.ExecutionException * @throws InterruptedException * @throws java.io.IOException */ @ApiOperation(value = "This filter performs a Gaussian blur on an image.") @RequestMapping(value = "/filter/{documentId}/gaussian.{format}", method = { RequestMethod.GET }) public ResponseEntity<byte[]> imageDespeckleByFile( @ApiParam(name = "documentId", required = true, defaultValue = "8D981024-A297-4169-8603-E503CC38EEDA") @PathVariable(value = "documentId") String documentId, @ApiParam(name = "radius", required = true, defaultValue = "2") @RequestParam(required = false, defaultValue = "2") int radius, @ApiParam(name = "format", required = true, defaultValue = "jpg") @PathVariable(value = "format") String format ) throws TimeoutException, ExecutionException, InterruptedException, IOException { String _contentType = MimeType.getMimeType(format).contentType; if (!MimeType.getMimeType(format).isSupportedImage()) { return new ResponseEntity<byte[]>(HttpStatus.UNSUPPORTED_MEDIA_TYPE); } GaussianJob args = new GaussianJob(); args.setDocumentId(documentId); args.setRadius(radius); Future<Map> imageFuture = imageFilterGaussianGateway.imageGaussianFilter(args); ImageDocumentJob payload = (ImageDocumentJob) imageFuture.get(defaultTimeout, TimeUnit.MILLISECONDS); ResponseEntity<byte[]> result = ResponseEntityHelper.processImage(payload.getBufferedImage(), _contentType, false); return result; } /** * This filter performs a Gaussian blur on an uploaded image. * * @param file * @param radius * @param format * @return * @throws java.util.concurrent.TimeoutException * @throws java.util.concurrent.ExecutionException * @throws InterruptedException * @throws java.io.IOException */ @ApiOperation(value = "This filter performs a Gaussian blur on an image.") @RequestMapping(value = "/filter/gaussian", method = { RequestMethod.POST }) public ResponseEntity<byte[]> imageDespeckleByFile(HttpServletRequest request, HttpServletResponse response, @ApiParam(name = "file", required = false) @RequestParam(value = "file", required = false) MultipartFile file, @ApiParam(name = "radius", required = true, defaultValue = "2") @RequestParam(required = false, defaultValue = "2") int radius, @ApiParam(name = "format", required = false) @RequestParam(value = "format", required = false) String format ) throws TimeoutException, ExecutionException, InterruptedException, IOException { Document _file = null; MimeType _outputMimeType = null; String _outputContentType = null; MultipartFile _mFile = fileUploadHelper.getFileFromRequest(file, request); _file = new Document(_mFile); _outputMimeType = fileUploadHelper.getOutputFileFormat(format, _file.getContentType()); _outputContentType = _outputMimeType.contentType; if (!_file.getContentType().isSupportedImage() || !_outputMimeType.isSupportedImage()) { return new ResponseEntity<>(HttpStatus.UNSUPPORTED_MEDIA_TYPE); } GaussianJob job = new GaussianJob(); job.setDocumentId(null); job.setDocument(new Document(file)); job.setRadius(radius); Future<Map> imageFuture = imageFilterGaussianGateway.imageGaussianFilter(job); ImageDocumentJob payload = (ImageDocumentJob) imageFuture.get(defaultTimeout, TimeUnit.MILLISECONDS); ResponseEntity<byte[]> result = ResponseEntityHelper.processImage(payload.getBufferedImage(), _outputContentType, false); return result; } }