v2.
Service for reading from and writing to existing Bigtable tables.
Constructor
BigtableClient
new BigtableClient(options)
Construct an instance of BigtableClient.
Parameter |
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options |
Optional object The configuration object. See the subsequent parameters for more details. Values in
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Properties
port
The port for this API service.
scopes
The scopes needed to make gRPC calls for every method defined in this service.
servicePath
The DNS address for this API service.
Methods
checkAndMutateRow
checkAndMutateRow(request, options, callback) returns Promise
Mutates a row atomically based on the output of a predicate Reader filter.
Parameter |
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request |
Object The request object that will be sent. Values in
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options |
Optional Object Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details. |
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callback |
Optional function(nullable Error, nullable Object) The function which will be called with the result of the API call. The second parameter to the callback is an object representing CheckAndMutateRowResponse. |
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- Returns
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Promise- The promise which resolves to an array. The first element of the array is an object representing CheckAndMutateRowResponse. The promise has a method named "cancel" which cancels the ongoing API call.
Example
const bigtable = require('@google-cloud/bigtable');
var client = new bigtable.v2.BigtableClient({
// optional auth parameters.
});
var formattedTableName = client.tablePath('[PROJECT]', '[INSTANCE]', '[TABLE]');
var rowKey = '';
var request = {
tableName: formattedTableName,
rowKey: rowKey,
};
client.checkAndMutateRow(request)
.then(responses => {
var response = responses[0];
// doThingsWith(response)
})
.catch(err => {
console.error(err);
});getProjectId
getProjectId(callback)
Return the project ID used by this class.
Parameter |
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callback |
function(Error, string) the callback to be called with the current project Id. |
matchInstanceFromTableName
matchInstanceFromTableName(tableName) returns String
Parse the tableName from a table resource.
Parameter |
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tableName |
String A fully-qualified path representing a table resources. |
- Returns
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String- A string representing the instance.
matchProjectFromTableName
matchProjectFromTableName(tableName) returns String
Parse the tableName from a table resource.
Parameter |
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tableName |
String A fully-qualified path representing a table resources. |
- Returns
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String- A string representing the project.
matchTableFromTableName
matchTableFromTableName(tableName) returns String
Parse the tableName from a table resource.
Parameter |
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tableName |
String A fully-qualified path representing a table resources. |
- Returns
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String- A string representing the table.
mutateRow
mutateRow(request, options, callback) returns Promise
Mutates a row atomically. Cells already present in the row are left unchanged unless explicitly changed by mutation.
Parameter |
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request |
Object The request object that will be sent. Values in
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options |
Optional Object Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details. |
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callback |
Optional function(nullable Error, nullable Object) The function which will be called with the result of the API call. The second parameter to the callback is an object representing MutateRowResponse. |
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- Returns
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Promise- The promise which resolves to an array. The first element of the array is an object representing MutateRowResponse. The promise has a method named "cancel" which cancels the ongoing API call.
Example
const bigtable = require('@google-cloud/bigtable');
var client = new bigtable.v2.BigtableClient({
// optional auth parameters.
});
var formattedTableName = client.tablePath('[PROJECT]', '[INSTANCE]', '[TABLE]');
var rowKey = '';
var mutations = [];
var request = {
tableName: formattedTableName,
rowKey: rowKey,
mutations: mutations,
};
client.mutateRow(request)
.then(responses => {
var response = responses[0];
// doThingsWith(response)
})
.catch(err => {
console.error(err);
});mutateRows
mutateRows(request, options) returns Stream
Mutates multiple rows in a batch. Each individual row is mutated atomically as in MutateRow, but the entire batch is not executed atomically.
Parameter |
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request |
Object The request object that will be sent. Values in
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options |
Optional Object Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details. |
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- Returns
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StreamAn object stream which emits MutateRowsResponse on 'data' event.
Example
const bigtable = require('@google-cloud/bigtable');
var client = new bigtable.v2.BigtableClient({
// optional auth parameters.
});
var formattedTableName = client.tablePath('[PROJECT]', '[INSTANCE]', '[TABLE]');
var entries = [];
var request = {
tableName: formattedTableName,
entries: entries,
};
client.mutateRows(request).on('data', response => {
// doThingsWith(response)
});readModifyWriteRow
readModifyWriteRow(request, options, callback) returns Promise
Modifies a row atomically on the server. The method reads the latest existing timestamp and value from the specified columns and writes a new entry based on pre-defined read/modify/write rules. The new value for the timestamp is the greater of the existing timestamp or the current server time. The method returns the new contents of all modified cells.
Parameter |
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request |
Object The request object that will be sent. Values in
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options |
Optional Object Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details. |
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callback |
Optional function(nullable Error, nullable Object) The function which will be called with the result of the API call. The second parameter to the callback is an object representing ReadModifyWriteRowResponse. |
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- Returns
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Promise- The promise which resolves to an array. The first element of the array is an object representing ReadModifyWriteRowResponse. The promise has a method named "cancel" which cancels the ongoing API call.
Example
const bigtable = require('@google-cloud/bigtable');
var client = new bigtable.v2.BigtableClient({
// optional auth parameters.
});
var formattedTableName = client.tablePath('[PROJECT]', '[INSTANCE]', '[TABLE]');
var rowKey = '';
var rules = [];
var request = {
tableName: formattedTableName,
rowKey: rowKey,
rules: rules,
};
client.readModifyWriteRow(request)
.then(responses => {
var response = responses[0];
// doThingsWith(response)
})
.catch(err => {
console.error(err);
});readRows
readRows(request, options) returns Stream
Streams back the contents of all requested rows in key order, optionally applying the same Reader filter to each. Depending on their size, rows and cells may be broken up across multiple responses, but atomicity of each row will still be preserved. See the ReadRowsResponse documentation for details.
Parameter |
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request |
Object The request object that will be sent. Values in
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options |
Optional Object Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details. |
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- Returns
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StreamAn object stream which emits ReadRowsResponse on 'data' event.
Example
const bigtable = require('@google-cloud/bigtable');
var client = new bigtable.v2.BigtableClient({
// optional auth parameters.
});
var formattedTableName = client.tablePath('[PROJECT]', '[INSTANCE]', '[TABLE]');
client.readRows({tableName: formattedTableName}).on('data', response => {
// doThingsWith(response)
});sampleRowKeys
sampleRowKeys(request, options) returns Stream
Returns a sample of row keys in the table. The returned row keys will delimit contiguous sections of the table of approximately equal size, which can be used to break up the data for distributed tasks like mapreduces.
Parameter |
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request |
Object The request object that will be sent. Values in
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options |
Optional Object Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details. |
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- Returns
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StreamAn object stream which emits SampleRowKeysResponse on 'data' event.
Example
const bigtable = require('@google-cloud/bigtable');
var client = new bigtable.v2.BigtableClient({
// optional auth parameters.
});
var formattedTableName = client.tablePath('[PROJECT]', '[INSTANCE]', '[TABLE]');
client.sampleRowKeys({tableName: formattedTableName}).on('data', response => {
// doThingsWith(response)
});tablePath
tablePath(project, instance, table) returns String
Return a fully-qualified table resource name string.
Parameter |
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project |
String |
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instance |
String |
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table |
String |
- Returns
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String