Skip to content
Permalink
Browse files
docs(samples): add export model (#970)
  • Loading branch information
Praful Makani committed Nov 24, 2020
1 parent 3994be6 commit 2edad15764f144268f1bd3052d1d0ac069a2f377
@@ -0,0 +1,72 @@
/*
* 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.bigquery;

// [START bigquery_export_model]
import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryException;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.ExtractJobConfiguration;
import com.google.cloud.bigquery.Job;
import com.google.cloud.bigquery.JobInfo;
import com.google.cloud.bigquery.ModelId;

// Sample to extract model to GCS bucket
public class ExtractModel {

public static void main(String[] args) throws InterruptedException {
// TODO(developer): Replace these variables before running the sample.
String projectName = "bigquery-public-data";
String datasetName = "samples";
String modelName = "model";
String bucketName = "MY-BUCKET-NAME";
String destinationUri = "gs://" + bucketName + "/path/to/file";
extractModel(projectName, datasetName, modelName, destinationUri);
}

public static void extractModel(
String projectName, String datasetName, String modelName, String destinationUri)
throws InterruptedException {
try {
// Initialize client that will be used to send requests. This client only needs to be created
// once, and can be reused for multiple requests.
BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();

ModelId modelId = ModelId.of(projectName, datasetName, modelName);

ExtractJobConfiguration extractConfig =
ExtractJobConfiguration.newBuilder(modelId, destinationUri).build();

Job job = bigquery.create(JobInfo.of(extractConfig));

// Blocks until this job completes its execution, either failing or succeeding.
Job completedJob = job.waitFor();
if (completedJob == null) {
System.out.println("Job not executed since it no longer exists.");
return;
} else if (completedJob.getStatus().getError() != null) {
System.out.println(
"BigQuery was unable to extract due to an error: \n" + job.getStatus().getError());
return;
}
System.out.println("Model extract successful");
} catch (BigQueryException ex) {
System.out.println("Model extraction job was interrupted. \n" + ex.toString());
}
}
}
// [END bigquery_export_model]
@@ -0,0 +1,77 @@
/*
* 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.bigquery;

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

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

public class ExtractModelIT {

private final Logger log = Logger.getLogger(this.getClass().getName());
private ByteArrayOutputStream bout;
private PrintStream out;
private PrintStream originalPrintStream;

private static final String GCS_BUCKET = System.getenv("GCS_BUCKET");

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

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

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

@After
public void tearDown() {
// restores print statements in the original method
System.out.flush();
System.setOut(originalPrintStream);
log.log(Level.INFO, bout.toString());
}

@Test
public void testExtractModel() throws InterruptedException {
String projectId = "bigquery-public-data";
String datasetName = "samples";
String modelName = "model";
String destinationUri = "gs://" + GCS_BUCKET + "/extractModel";
// Extract model content to GCS
ExtractModel.extractModel(projectId, datasetName, modelName, destinationUri);
assertThat(bout.toString()).contains("Model extract successful");
}
}

0 comments on commit 2edad15

Please sign in to comment.