-
Notifications
You must be signed in to change notification settings - Fork 118
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
docs(samples): add load json file from gcs into a table (#568)
- Loading branch information
Praful Makani
authored
Jul 20, 2020
1 parent
4b3c4f7
commit 3d65821
Showing
2 changed files
with
163 additions
and
0 deletions.
There are no files selected for viewing
77 changes: 77 additions & 0 deletions
77
samples/snippets/src/main/java/com/example/bigquery/LoadJsonFromGCS.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -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; | ||
|
||
// [START bigquery_load_table_gcs_json] | ||
import com.google.cloud.bigquery.BigQuery; | ||
import com.google.cloud.bigquery.BigQueryException; | ||
import com.google.cloud.bigquery.BigQueryOptions; | ||
import com.google.cloud.bigquery.Field; | ||
import com.google.cloud.bigquery.FormatOptions; | ||
import com.google.cloud.bigquery.Job; | ||
import com.google.cloud.bigquery.JobInfo; | ||
import com.google.cloud.bigquery.LoadJobConfiguration; | ||
import com.google.cloud.bigquery.Schema; | ||
import com.google.cloud.bigquery.StandardSQLTypeName; | ||
import com.google.cloud.bigquery.TableId; | ||
|
||
// Sample to load JSON data from Cloud Storage into a new BigQuery table | ||
public class LoadJsonFromGCS { | ||
|
||
public static void runLoadJsonFromGCS() { | ||
// TODO(developer): Replace these variables before running the sample. | ||
String datasetName = "MY_DATASET_NAME"; | ||
String tableName = "MY_TABLE_NAME"; | ||
String sourceUri = "gs://cloud-samples-data/bigquery/us-states/us-states.json"; | ||
Schema schema = | ||
Schema.of( | ||
Field.of("name", StandardSQLTypeName.STRING), | ||
Field.of("post_abbr", StandardSQLTypeName.STRING)); | ||
loadJsonFromGCS(datasetName, tableName, sourceUri, schema); | ||
} | ||
|
||
public static void loadJsonFromGCS( | ||
String datasetName, String tableName, String sourceUri, Schema schema) { | ||
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(); | ||
|
||
TableId tableId = TableId.of(datasetName, tableName); | ||
LoadJobConfiguration loadConfig = | ||
LoadJobConfiguration.newBuilder(tableId, sourceUri) | ||
.setFormatOptions(FormatOptions.json()) | ||
.setSchema(schema) | ||
.build(); | ||
|
||
// Load data from a GCS JSON file into the table | ||
Job job = bigquery.create(JobInfo.of(loadConfig)); | ||
// Blocks until this load table job completes its execution, either failing or succeeding. | ||
job = job.waitFor(); | ||
if (job.isDone()) { | ||
System.out.println("Json from GCS successfully loaded in a table"); | ||
} else { | ||
System.out.println( | ||
"BigQuery was unable to load into the table due to an error:" | ||
+ job.getStatus().getError()); | ||
} | ||
} catch (BigQueryException | InterruptedException e) { | ||
System.out.println("Column not added during load append \n" + e.toString()); | ||
} | ||
} | ||
} | ||
// [END bigquery_load_table_gcs_json] |
86 changes: 86 additions & 0 deletions
86
samples/snippets/src/test/java/com/example/bigquery/LoadJsonFromGCSIT.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,86 @@ | ||
/* | ||
* 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 com.google.cloud.bigquery.Field; | ||
import com.google.cloud.bigquery.Schema; | ||
import com.google.cloud.bigquery.StandardSQLTypeName; | ||
import java.io.ByteArrayOutputStream; | ||
import java.io.PrintStream; | ||
import java.util.UUID; | ||
import org.junit.After; | ||
import org.junit.Before; | ||
import org.junit.BeforeClass; | ||
import org.junit.Test; | ||
|
||
public class LoadJsonFromGCSIT { | ||
|
||
private String tableName; | ||
private ByteArrayOutputStream bout; | ||
private PrintStream out; | ||
|
||
private static final String BIGQUERY_DATASET_NAME = requireEnvVar("BIGQUERY_DATASET_NAME"); | ||
|
||
private static String requireEnvVar(String varName) { | ||
String value = System.getenv(varName); | ||
assertNotNull( | ||
"Environment variable " + varName + " is required to perform these tests.", | ||
System.getenv(varName)); | ||
return value; | ||
} | ||
|
||
@BeforeClass | ||
public static void checkRequirements() { | ||
requireEnvVar("BIGQUERY_DATASET_NAME"); | ||
} | ||
|
||
@Before | ||
public void setUp() { | ||
bout = new ByteArrayOutputStream(); | ||
out = new PrintStream(bout); | ||
System.setOut(out); | ||
|
||
// Create a test table | ||
tableName = "MY_LOAD_JSON_TABLE_FROM_GCS_TEST_" + UUID.randomUUID().toString().substring(0, 8); | ||
CreateTable.createTable(BIGQUERY_DATASET_NAME, tableName, Schema.of()); | ||
|
||
bout = new ByteArrayOutputStream(); | ||
out = new PrintStream(bout); | ||
System.setOut(out); | ||
} | ||
|
||
@After | ||
public void tearDown() { | ||
// Clean up | ||
DeleteTable.deleteTable(BIGQUERY_DATASET_NAME, tableName); | ||
System.setOut(null); | ||
} | ||
|
||
@Test | ||
public void loadLoadJsonFromGCS() { | ||
String sourceUri = "gs://cloud-samples-data/bigquery/us-states/us-states.json"; | ||
Schema schema = | ||
Schema.of( | ||
Field.of("name", StandardSQLTypeName.STRING), | ||
Field.of("post_abbr", StandardSQLTypeName.STRING)); | ||
LoadJsonFromGCS.loadJsonFromGCS(BIGQUERY_DATASET_NAME, tableName, sourceUri, schema); | ||
assertThat(bout.toString()).contains("Json from GCS successfully loaded in a table"); | ||
} | ||
} |