/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package edu.usc.irds.tensorflow.grpc; import com.google.protobuf.ByteString; import io.grpc.ManagedChannel; import io.grpc.netty.NettyChannelBuilder; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.Closeable; import java.io.IOException; import java.io.InputStream; import java.util.*; import static edu.usc.irds.tensorflow.grpc.InceptionInference.InceptionRequest; import static edu.usc.irds.tensorflow.grpc.InceptionInference.InceptionResponse; /** * This class offers image recognition implementation. * */ public class TensorflowObjectRecogniser implements Closeable { private static final Logger LOG = LoggerFactory.getLogger(TensorflowObjectRecogniser.class); private ManagedChannel channel; private InceptionBlockingStub stub; public TensorflowObjectRecogniser(String host, int port) { LOG.debug("Creating channel host:{}, port={}", host, port); try { channel = NettyChannelBuilder .forAddress(host, port) .usePlaintext(true) .build(); stub = new InceptionBlockingStub(channel); //TODO: test channel here with a sample image } catch (Exception e) { throw new RuntimeException(e); } } public List<Map.Entry<String, Double>> recognise(InputStream stream) throws Exception { List<Map.Entry<String, Double>> objects = new ArrayList<>(); ByteString jpegData = ByteString.readFrom(stream); InceptionRequest request = InceptionRequest.newBuilder() .setJpegEncoded(jpegData) .build(); long st = System.currentTimeMillis(); InceptionResponse response = stub.classify(request); long timeTaken = System.currentTimeMillis() - st; LOG.debug("Time taken : {}ms", timeTaken); Iterator<String> classes = response.getClassesList().iterator(); Iterator<Float> scores = response.getScoresList().iterator(); while (classes.hasNext() && scores.hasNext()){ String className = classes.next(); Float score = scores.next(); Map.Entry<String, Double>object = new AbstractMap.SimpleEntry<>(className, score.doubleValue()); objects.add(object); } return objects; } @Override public void close() throws IOException { if (channel != null){ LOG.debug("Closing the channel "); channel.shutdownNow(); } } }