Lee e imprime

Lee e imprime una fila

Muestra de código

C#

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

Para autenticarte en Bigtable, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local.

using Google.Cloud.Bigtable.Common.V2;
using Google.Cloud.Bigtable.V2;
using System;
using System.Linq;

namespace Reads
{
    public class ReadSnippets
    {
        // Write your code here.
        // ...
        public string printRow(Row row)
        {
            String result = $"Reading data for {row.Key.ToStringUtf8()}\n";
            foreach (Family family in row.Families)
            {
                result += $"Column Family {family.Name}\n";

                foreach (Column column in family.Columns)
                {
                    foreach (Cell cell in column.Cells)
                    {
                        result += $"\t{column.Qualifier.ToStringUtf8()}: {cell.Value.ToStringUtf8()} @{cell.TimestampMicros} {cell.Labels}\n";
                    }
                }
            }
            result += "\n";
            Console.WriteLine(result);
            return result;
        }
    }
}

Go

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

func printRow(w io.Writer, row bigtable.Row) {
	fmt.Fprintf(w, "Reading data for %s:\n", row.Key())
	for columnFamily, cols := range row {
		fmt.Fprintf(w, "Column Family %s\n", columnFamily)
		for _, col := range cols {
			qualifier := col.Column[strings.IndexByte(col.Column, ':')+1:]
			fmt.Fprintf(w, "\t%s: %s @%d\n", qualifier, col.Value, col.Timestamp)
		}
	}
	fmt.Fprintln(w)
}

Java

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.


import static com.google.cloud.bigtable.data.v2.models.Filters.FILTERS;

import com.google.api.gax.rpc.ServerStream;
import com.google.cloud.bigtable.data.v2.BigtableDataClient;
import com.google.cloud.bigtable.data.v2.models.Filters;
import com.google.cloud.bigtable.data.v2.models.Query;
import com.google.cloud.bigtable.data.v2.models.Row;
import com.google.cloud.bigtable.data.v2.models.RowCell;
import com.google.cloud.bigtable.data.v2.models.TableId;
import java.io.IOException;

public class Reads {

  // Write your code here.
  // ...

  private static void printRow(Row row) {
    System.out.printf("Reading data for %s%n", row.getKey().toStringUtf8());
    String colFamily = "";
    for (RowCell cell : row.getCells()) {
      if (!cell.getFamily().equals(colFamily)) {
        colFamily = cell.getFamily();
        System.out.printf("Column Family %s%n", colFamily);
      }
      System.out.printf(
          "\t%s: %s @%s%n",
          cell.getQualifier().toStringUtf8(), cell.getValue().toStringUtf8(), cell.getTimestamp());
    }
    System.out.println();
  }
}

Node.js

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

  const {Bigtable} = require('@google-cloud/bigtable');
  const bigtable = new Bigtable();

  // TODO(developer): Uncomment these variables before running the sample

  // const instanceId = 'YOUR_INSTANCE_ID';
  // const tableId = 'YOUR_TABLE_ID';
  const instance = bigtable.instance(instanceId);
  const table = instance.table(tableId);

  // Write your code here.
  // ...

  function printRow(rowkey, rowData) {
    console.log(`Reading data for ${rowkey}:`);

    for (const columnFamily of Object.keys(rowData)) {
      const columnFamilyData = rowData[columnFamily];
      console.log(`Column Family ${columnFamily}`);

      for (const columnQualifier of Object.keys(columnFamilyData)) {
        const col = columnFamilyData[columnQualifier];

        for (const cell of col) {
          const labels = cell.labels.length
            ? ` [${cell.labels.join(',')}]`
            : '';
          console.log(
            `\t${columnQualifier}: ${cell.value} @${cell.timestamp}${labels}`
          );
        }
      }
    }
    console.log();
  }
}

PHP

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

// Helper function for printing the row data
function print_row(string $key, array $row): void
{
    printf('Reading data for row %s' . PHP_EOL, $key);
    foreach ((array) $row as $family => $cols) {
        printf('Column Family %s' . PHP_EOL, $family);
        foreach ($cols as $col => $data) {
            for ($i = 0; $i < count($data); $i++) {
                printf(
                    "\t%s: %s @%s%s" . PHP_EOL,
                    $col,
                    $data[$i]['value'],
                    $data[$i]['timeStamp'],
                    $data[$i]['labels'] ? sprintf(' [%s]', $data[$i]['labels']) : ''
                );
            }
        }
    }
    print(PHP_EOL);
}

Python

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

from google.cloud import bigtable
import google.cloud.bigtable.row_filters as row_filters
from google.cloud.bigtable.row_set import RowSet

# Write your code here.
# ...

def print_row(row):
    print("Reading data for {}:".format(row.row_key.decode("utf-8")))
    for cf, cols in sorted(row.cells.items()):
        print("Column Family {}".format(cf))
        for col, cells in sorted(cols.items()):
            for cell in cells:
                labels = (
                    " [{}]".format(",".join(cell.labels)) if len(cell.labels) else ""
                )
                print(
                    "\t{}: {} @{}{}".format(
                        col.decode("utf-8"),
                        cell.value.decode("utf-8"),
                        cell.timestamp,
                        labels,
                    )
                )
    print("")

Ruby

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

# Import google bigtable client lib
require "google/cloud/bigtable"
# Write your code here.
# ...
def print_row row
  puts "Reading data for #{row.key}:"

  row.cells.each do |column_family, data|
    puts "Column Family #{column_family}"
    data.each do |cell|
      labels = !cell.labels.empty? ? " [#{cell.labels.join ','}]" : ""
      puts "\t#{cell.qualifier}: #{cell.value} @#{cell.timestamp}#{labels}"
    end
  end
  puts "\n"
end

¿Qué sigue?

Para buscar y filtrar muestras de código para otros productos de Google Cloud, consulta el navegador de muestra de Google Cloud.