Menambahkan ke sel gabungan
Tetap teratur dengan koleksi
Simpan dan kategorikan konten berdasarkan preferensi Anda.
Menambahkan bilangan bulat ke sel gabungan. Jenis penulisan ini membuat permintaan AddToCell API.
Mempelajari lebih lanjut
Untuk dokumentasi mendetail yang menyertakan contoh kode ini, lihat artikel berikut:
Contoh kode
Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Sulit dipahami","hardToUnderstand","thumb-down"],["Informasi atau kode contoh salah","incorrectInformationOrSampleCode","thumb-down"],["Informasi/contoh yang saya butuhkan tidak ada","missingTheInformationSamplesINeed","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis page demonstrates how to add an integer to an aggregate cell in Bigtable, using the AddToCell API request.\u003c/p\u003e\n"],["\u003cp\u003eThe provided code samples illustrate how to increment a view count for a specific page in both Go and Java.\u003c/p\u003e\n"],["\u003cp\u003eThe examples show how to bucket views into hourly counts, and demonstrates the use of the AddToCell method in Go and the addToCell/mergeToCell methods in Java.\u003c/p\u003e\n"],["\u003cp\u003eTo utilize the provided code you must set up Application Default Credentials and install the Bigtable client library.\u003c/p\u003e\n"]]],[],null,["Add an integer to an aggregate cell. This type of write makes an AddToCell API request.\n\nExplore further\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Write examples](/bigtable/docs/writing-data)\n\nCode sample \n\nGo\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n import (\n \t\"context\"\n \t\"fmt\"\n \t\"io\"\n \t\"time\"\n\n \t\"cloud.google.com/go/bigtable\"\n )\n\n func writeAggregate(w io.Writer, projectID, instanceID string, tableName string) error {\n \t// projectID := \"my-project-id\"\n \t// instanceID := \"my-instance-id\"\n \t// tableName := \"mobile-time-series\"\n\n \tctx := context.Background()\n \tclient, err := bigtable.https://cloud.google.com/go/docs/reference/cloud.google.com/go/bigtable/latest/index.html#cloud_google_com_go_bigtable_Client_NewClient(ctx, projectID, instanceID)\n \tif err != nil {\n \t\treturn fmt.Errorf(\"bigtable.NewClient: %w\", err)\n \t}\n \tdefer client.Close()\n \ttbl := client.https://cloud.google.com/go/docs/reference/cloud.google.com/go/bigtable/latest/index.html#cloud_google_com_go_bigtable_Client_Open(tableName)\n \tcolumnFamilyName := \"view_count\"\n \tviewTimestamp, err := time.Parse(time.RFC3339, \"2024-03-13T12:41:34Z\")\n \tif err != nil {\n \t\treturn err\n \t}\n \thourlyBucket := viewTimestamp.Truncate(time.Hour)\n\n \tmut := bigtable.https://cloud.google.com/go/docs/reference/cloud.google.com/go/bigtable/latest/index.html#cloud_google_com_go_bigtable_Mutation_NewMutation()\n \tmut.https://cloud.google.com/go/docs/reference/cloud.google.com/go/bigtable/latest/index.html#cloud_google_com_go_bigtable_Mutation_AddIntToCell(columnFamilyName, \"views\", bigtable.https://cloud.google.com/go/docs/reference/cloud.google.com/go/bigtable/latest/index.html#cloud_google_com_go_bigtable_Timestamp_Time(hourlyBucket), 1)\n\n \trowKey := \"page#index.html\"\n \tif err := tbl.https://cloud.google.com/go/docs/reference/cloud.google.com/go/bigtable/latest/index.html#cloud_google_com_go_bigtable_Table_Apply(ctx, rowKey, mut); err != nil {\n \t\treturn fmt.Errorf(\"Apply: %w\", err)\n \t}\n\n \tfmt.Fprintf(w, \"Successfully wrote row: %s\\n\", rowKey)\n \treturn nil\n }\n\nJava\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n\n import com.google.cloud.bigtable.data.v2.https://cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.BigtableDataClient.html;\n import com.google.cloud.bigtable.data.v2.models.https://cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.models.RowMutation.html;\n import com.google.common.primitives.Longs;\n import com.google.protobuf.https://cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.ByteString.html;\n import java.time.Instant;\n import java.time.temporal.ChronoUnit;\n\n public class WriteAggregate {\n private static final String COUNT_COLUMN_FAMILY_NAME = \"view_count\";\n private static final long MICROS_PER_MILLI = 1000;\n\n public static void writeAggregate(String projectId, String instanceId, String tableId) {\n // String projectId = \"my-project-id\";\n // String instanceId = \"my-instance-id\";\n // String tableId = \"page-view-counter\";\n\n try (https://cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.BigtableDataClient.html dataClient = https://cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.BigtableDataClient.html.create(projectId, instanceId)) {\n\n String rowKey = \"page#index.html\";\n Instant viewTimestamp = Instant.parse(\"2024-03-13T12:41:34.123Z\");\n\n // Bucket the views for an hour into a single count, giving us an hourly view count for a\n // given page.\n Instant hourlyBucket = viewTimestamp.truncatedTo(ChronoUnit.HOURS);\n long hourlyBucketMicros = hourlyBucket.toEpochMilli() * MICROS_PER_MILLI;\n\n https://cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.models.RowMutation.html rowMutation =\n https://cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.models.RowMutation.html.create(tableId, rowKey)\n .addToCell(COUNT_COLUMN_FAMILY_NAME, \"views\", hourlyBucketMicros, 1);\n\n dataClient.https://cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.BigtableDataClient.html#com_google_cloud_bigtable_data_v2_BigtableDataClient_mutateRow_com_google_cloud_bigtable_data_v2_models_RowMutation_(rowMutation);\n System.out.printf(\"Successfully wrote row %s\", rowKey);\n\n } catch (Exception e) {\n System.out.println(\"Error during WriteAggregate: \\n\" + e.toString());\n }\n }\n\n public static void mergeAggregate(String projectId, String instanceId, String tableId) {\n // String projectId = \"my-project-id\";\n // String instanceId = \"my-instance-id\";\n // String tableId = \"page-view-counter\";\n\n try (https://cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.BigtableDataClient.html dataClient = https://cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.BigtableDataClient.html.create(projectId, instanceId)) {\n\n String rowKey = \"page#index.html\";\n Instant viewTimestamp = Instant.parse(\"2024-03-13T12:41:34.123Z\");\n\n // Bucket the views for an hour into a single count, giving us an hourly view count for a\n // given page.\n Instant hourlyBucket = viewTimestamp.truncatedTo(ChronoUnit.HOURS);\n long hourlyBucketMicros = hourlyBucket.toEpochMilli() * MICROS_PER_MILLI;\n\n https://cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.models.RowMutation.html rowMutation =\n https://cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.models.RowMutation.html.create(tableId, rowKey)\n .mergeToCell(\n COUNT_COLUMN_FAMILY_NAME,\n \"views\",\n hourlyBucketMicros,\n https://cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.ByteString.html.https://cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.ByteString.html#com_google_protobuf_ByteString_copyFrom_byte___(Longs.toByteArray(1L)));\n\n dataClient.https://cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.BigtableDataClient.html#com_google_cloud_bigtable_data_v2_BigtableDataClient_mutateRow_com_google_cloud_bigtable_data_v2_models_RowMutation_(rowMutation);\n System.out.printf(\"Successfully wrote row %s\", rowKey);\n\n } catch (Exception e) {\n System.out.println(\"Error during mergeAggregate: \\n\" + e.toString());\n }\n }\n }\n\nWhat's next\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=bigtable)."]]