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vision: move samples out of branch and add clarifying comments #2297

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Original file line number Diff line number Diff line change
@@ -0,0 +1,90 @@
/*
* Copyright 2020 Google LLC
*
* Licensed 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 com.example.vision;

// [START vision_async_batch_annotate_images]
import com.google.cloud.vision.v1.AnnotateImageRequest;
import com.google.cloud.vision.v1.AsyncBatchAnnotateImagesRequest;
import com.google.cloud.vision.v1.AsyncBatchAnnotateImagesResponse;
import com.google.cloud.vision.v1.Feature;
import com.google.cloud.vision.v1.GcsDestination;
import com.google.cloud.vision.v1.Image;
import com.google.cloud.vision.v1.ImageAnnotatorClient;
import com.google.cloud.vision.v1.ImageSource;
import com.google.cloud.vision.v1.OutputConfig;

import java.io.IOException;
import java.util.concurrent.ExecutionException;

public class AsyncBatchAnnotateImages {

public static void asyncBatchAnnotateImages()
throws InterruptedException, ExecutionException, IOException {
String inputImageUri = "gs://cloud-samples-data/vision/label/wakeupcat.jpg";
String outputUri = "gs://YOUR_BUCKET_ID/path/to/save/results/";
asyncBatchAnnotateImages(inputImageUri, outputUri);
}

public static void asyncBatchAnnotateImages(String inputImageUri, String outputUri)
throws IOException, ExecutionException, InterruptedException {
// Initialize client that will be used to send requests. This client only needs to be created
// once, and can be reused for multiple requests. After completing all of your requests, call
// the "close" method on the client to safely clean up any remaining background resources.
try (ImageAnnotatorClient imageAnnotatorClient = ImageAnnotatorClient.create()) {

// You can send multiple images to be annotated, this sample demonstrates how to do this with
// one image. If you want to use multiple images, you have to create a `AnnotateImageRequest`
// object for each image that you want annotated.
// First specify where the vision api can find the image
ImageSource source = ImageSource.newBuilder().setImageUri(inputImageUri).build();
Image image = Image.newBuilder().setSource(source).build();

// Set the type of annotation you want to perform on the image
// https://cloud.google.com/vision/docs/reference/rpc/google.cloud.vision.v1#google.cloud.vision.v1.Feature.Type
Feature feature = Feature.newBuilder().setType(Feature.Type.LABEL_DETECTION).build();

// Build the request object for that one image. Note: for additional images you have to create
// additional `AnnotateImageRequest` objects and store them in a list to be used below.
AnnotateImageRequest imageRequest =
AnnotateImageRequest.newBuilder().setImage(image).addFeatures(feature).build();

// Set where to store the results for the images that will be annotated.
GcsDestination gcsDestination = GcsDestination.newBuilder().setUri(outputUri).build();
OutputConfig outputConfig =
OutputConfig.newBuilder()
.setGcsDestination(gcsDestination)
.setBatchSize(2) // The max number of responses to output in each JSON file
.build();

// Add each `AnnotateImageRequest` object to the batch request and add the output config.
AsyncBatchAnnotateImagesRequest request =
AsyncBatchAnnotateImagesRequest.newBuilder()
.addRequests(imageRequest)
.setOutputConfig(outputConfig)
.build();

// Make the asynchronous batch request.
AsyncBatchAnnotateImagesResponse response =
imageAnnotatorClient.asyncBatchAnnotateImagesAsync(request).get();

// The output is written to GCS with the provided output_uri as prefix
String gcsOutputUri = response.getOutputConfig().getGcsDestination().getUri();
System.out.printf("Output written to GCS with prefix: %s\n", gcsOutputUri);
}
}
}
// [END vision_async_batch_annotate_images]
Original file line number Diff line number Diff line change
@@ -0,0 +1,88 @@
/*
* Copyright 2020 Google LLC
*
* Licensed 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 com.example.vision;

import static com.google.common.truth.Truth.assertThat;
import static junit.framework.TestCase.assertNotNull;

import com.google.api.gax.paging.Page;
import com.google.cloud.storage.Blob;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.UUID;
import java.util.concurrent.ExecutionException;

import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

@RunWith(JUnit4.class)
@SuppressWarnings("checkstyle:abbreviationaswordinname")
public class AsyncBatchAnnotateImagesTest {
private static final String PROJECT_ID = System.getenv("GOOGLE_CLOUD_PROJECT");
private static final String INPUT_URI = "gs://cloud-samples-data/vision/label/wakeupcat.jpg";
private static final String PREFIX = String.format("vision/%s/", UUID.randomUUID().toString());
private static final String OUTPUT_URI = String.format("gs://%s/%s", PROJECT_ID, PREFIX);

private ByteArrayOutputStream bout;
private PrintStream out;

private static void requireEnvVar(String varName) {
assertNotNull(
System.getenv(varName),
"Environment variable '%s' is required to perform these tests.".format(varName));
}

@BeforeClass
public static void checkRequirements() {
requireEnvVar("GOOGLE_CLOUD_PROJECT");
}

@Before
public void setUp() {
bout = new ByteArrayOutputStream();
out = new PrintStream(bout);
System.setOut(out);
}

@After
public void tearDown() {
System.setOut(null);

Storage storage = StorageOptions.getDefaultInstance().getService();

Page<Blob> blobs = storage.list(PROJECT_ID, Storage.BlobListOption.currentDirectory(),
Storage.BlobListOption.prefix(PREFIX));
for (Blob blob : blobs.iterateAll()) {
blob.delete();
}
}

@Test
public void testSetEndpoint() throws IOException, ExecutionException, InterruptedException {
AsyncBatchAnnotateImages.asyncBatchAnnotateImages(INPUT_URI, OUTPUT_URI);
String got = bout.toString();
assertThat(got).contains("Output written to GCS with prefix");
}
}