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Chapter 126. Google Sheets Stream Component


Available as of Camel version 2.23

The Google Sheets component provides access to Sheets via the Google Sheets Web APIs.

Google Sheets uses the OAuth 2.0 protocol for authenticating a Google account and authorizing access to user data. Before you can use this component, you will need to create an account and generate OAuth credentials. Credentials comprise of a clientId, clientSecret, and a refreshToken. A handy resource for generating a long-lived refreshToken is the OAuth playground.

Maven users will need to add the following dependency to their pom.xml for this component:

    <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-google-sheets</artifactId>
            <version>2.23.0</version>
    </dependency>

126.1. URI Format

The Google Sheets Component uses the following URI format:

        google-sheets-stream://apiName?[options]

126.2. GoogleSheetsStreamComponent

The Google Sheets Stream component supports 3 options, which are listed below.

NameDescriptionDefaultType

configuration (consumer)

To use the shared configuration

 

GoogleSheetsStream Configuration

clientFactory (advanced)

To use the GoogleSheetsClientFactory as factory for creating the client. Will by default use BatchGoogleSheetsClientFactory

 

GoogleSheetsClient Factory

resolveProperty Placeholders (advanced)

Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders.

true

boolean

The Google Sheets Stream endpoint is configured using URI syntax:

google-sheets-stream:apiName

with the following path and query parameters:

126.2.1. Path Parameters (1 parameters):

NameDescriptionDefaultType

apiName

Sets the apiName.

 

String

126.2.2. Query Parameters (31 parameters):

NameDescriptionDefaultType

accessToken (consumer)

OAuth 2 access token. This typically expires after an hour so refreshToken is recommended for long term usage.

 

String

applicationName (consumer)

Google sheets application name. Example would be camel-google-sheets/1.0

 

String

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

clientId (consumer)

Client ID of the sheets application

 

String

clientSecret (consumer)

Client secret of the sheets application

 

String

includeGridData (consumer)

True if grid data should be returned.

false

boolean

majorDimension (consumer)

Specifies the major dimension that results should use..

ROWS

String

maxResults (consumer)

Specify the maximum number of returned results. This will limit the number of rows in a returned value range data set or the number of returned value ranges in a batch request.

10

int

range (consumer)

Specifies the range of rows and columns in a sheet to get data from.

 

String

refreshToken (consumer)

OAuth 2 refresh token. Using this, the Google Calendar component can obtain a new accessToken whenever the current one expires - a necessity if the application is long-lived.

 

String

scopes (consumer)

Specifies the level of permissions you want a sheets application to have to a user account. See https://developers.google.com/identity/protocols/googlescopes for more info.

 

List

sendEmptyMessageWhenIdle (consumer)

If the polling consumer did not poll any files, you can enable this option to send an empty message (no body) instead.

false

boolean

spreadsheetId (consumer)

Specifies the spreadsheet identifier that is used to identify the target to obtain.

 

String

valueRenderOption (consumer)

Determines how values should be rendered in the output.

FORMATTED_VALUE

String

exceptionHandler (consumer)

To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored.

 

ExceptionHandler

exchangePattern (consumer)

Sets the exchange pattern when the consumer creates an exchange.

 

ExchangePattern

pollStrategy (consumer)

A pluggable org.apache.camel.PollingConsumerPollingStrategy allowing you to provide your custom implementation to control error handling usually occurred during the poll operation before an Exchange have been created and being routed in Camel.

 

PollingConsumerPoll Strategy

synchronous (advanced)

Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).

false

boolean

backoffErrorThreshold (scheduler)

The number of subsequent error polls (failed due some error) that should happen before the backoffMultipler should kick-in.

 

int

backoffIdleThreshold (scheduler)

The number of subsequent idle polls that should happen before the backoffMultipler should kick-in.

 

int

backoffMultiplier (scheduler)

To let the scheduled polling consumer backoff if there has been a number of subsequent idles/errors in a row. The multiplier is then the number of polls that will be skipped before the next actual attempt is happening again. When this option is in use then backoffIdleThreshold and/or backoffErrorThreshold must also be configured.

 

int

delay (scheduler)

Milliseconds before the next poll. You can also specify time values using units, such as 60s (60 seconds), 5m30s (5 minutes and 30 seconds), and 1h (1 hour).

500

long

greedy (scheduler)

If greedy is enabled, then the ScheduledPollConsumer will run immediately again, if the previous run polled 1 or more messages.

false

boolean

initialDelay (scheduler)

Milliseconds before the first poll starts. You can also specify time values using units, such as 60s (60 seconds), 5m30s (5 minutes and 30 seconds), and 1h (1 hour).

1000

long

runLoggingLevel (scheduler)

The consumer logs a start/complete log line when it polls. This option allows you to configure the logging level for that.

TRACE

LoggingLevel

scheduledExecutorService (scheduler)

Allows for configuring a custom/shared thread pool to use for the consumer. By default each consumer has its own single threaded thread pool.

 

ScheduledExecutor Service

scheduler (scheduler)

To use a cron scheduler from either camel-spring or camel-quartz2 component

none

ScheduledPollConsumer Scheduler

schedulerProperties (scheduler)

To configure additional properties when using a custom scheduler or any of the Quartz2, Spring based scheduler.

 

Map

startScheduler (scheduler)

Whether the scheduler should be auto started.

true

boolean

timeUnit (scheduler)

Time unit for initialDelay and delay options.

MILLISECONDS

TimeUnit

useFixedDelay (scheduler)

Controls if fixed delay or fixed rate is used. See ScheduledExecutorService in JDK for details.

true

boolean

126.3. Spring Boot Auto-Configuration

The component supports 16 options, which are listed below.

NameDescriptionDefaultType

camel.component.google-sheets-stream.client-factory

To use the GoogleSheetsClientFactory as factory for creating the client. Will by default use BatchGoogleSheetsClientFactory. The option is a org.apache.camel.component.google.sheets.GoogleSheetsClientFactory type.

 

String

camel.component.google-sheets-stream.configuration.access-token

OAuth 2 access token. This typically expires after an hour so refreshToken is recommended for long term usage.

 

String

camel.component.google-sheets-stream.configuration.api-name

Sets the apiName.

 

String

camel.component.google-sheets-stream.configuration.application-name

Google sheets application name. Example would be camel-google-sheets/1.0

 

String

camel.component.google-sheets-stream.configuration.client-id

Client ID of the sheets application

 

String

camel.component.google-sheets-stream.configuration.client-secret

Client secret of the sheets application

 

String

camel.component.google-sheets-stream.configuration.include-grid-data

True if grid data should be returned.

false

Boolean

camel.component.google-sheets-stream.configuration.major-dimension

Specifies the major dimension that results should use..

ROWS

String

camel.component.google-sheets-stream.configuration.max-results

Specify the maximum number of returned results. This will limit the number of rows in a returned value range data set or the number of returned value ranges in a batch request.

0

Integer

camel.component.google-sheets-stream.configuration.range

Specifies the range of rows and columns in a sheet to get data from.

 

String

camel.component.google-sheets-stream.configuration.refresh-token

OAuth 2 refresh token. Using this, the Google Calendar component can obtain a new accessToken whenever the current one expires - a necessity if the application is long-lived.

 

String

camel.component.google-sheets-stream.configuration.scopes

Specifies the level of permissions you want a sheets application to have to a user account. See https://developers.google.com/identity/protocols/googlescopes for more info.

 

List

camel.component.google-sheets-stream.configuration.spreadsheet-id

Specifies the spreadsheet identifier that is used to identify the target to obtain.

 

String

camel.component.google-sheets-stream.configuration.value-render-option

Determines how values should be rendered in the output.

FORMATTED_VALUE

String

camel.component.google-sheets-stream.enabled

Whether to enable auto configuration of the google-sheets-stream component. This is enabled by default.

 

Boolean

camel.component.google-sheets-stream.resolve-property-placeholders

Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders.

true

Boolean

126.4. Consumer

The consumer will poll by default with maxResults equals to 5.

For example

from("google-sheets-stream://data?range=A:B&delay=5000&maxResults=5").to("mock:result");

This route will consume the next ten events starting from the date of polling.

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