This document discusses how to connect Google APIs with Mule ESB. It explains that Google provides APIs that allow communication with Google services using OAuth 2.0 authentication. Mule ESB has connectors that can connect to various Google APIs like Google Spreadsheets, Contacts, Tasks, Calendar, and Drive. It provides details on how to use the Google Spreadsheets connector, including configuring OAuth authentication and making API calls to retrieve spreadsheet data.

1. Connecting Google API With Mule ESB
JITENDRA BAFNA

2. Connecting Google API With Mule ESB
Google provides set of Application Programming Interface which allows you to
communicate with Google services and their integration services. It is useful for
third-party to take advantages of API's and even can extend the functionalities of
API's. Example of these includes Search,YouTube, Google Spreadsheet, Google
Maps, Google Contacts etc. Google API's requires authentication and
authorization using OAuth 2.0.

3. Connecting Google API With Mule ESB
Mule ESB has capabilitiesto connectGoogleAPI's and it provides various connectorsto
connect theGoogleAPI's and perform the operationsthat you need. Below is list of
connector availableinAnypoint Exchangeto connectGoogleAPI's.
• GoogleSpreadsheets Connector
• GoogleContactsConnector
• GoogleTasksConnector
• GoogleCalendarConnector
• GooglePredictionConnector
• GoogleContactsRAML
• GoogleDrive RAML

4. Connecting Google API With Mule ESB

5. Connecting Google API With Mule ESB
Google Spreadsheets Connector provided instantAPI connectivity to Google
Spreadsheets API's, which allows you to create, modify or access google docs
using OAuth 2.0 authentication. For more details onGoogle Spreadsheets API,
click here.
By default, you will not find Google Spreadsheets Connector in your Anypoint
Studio. So you can install the connector from Anypoint Exchange. First thing you
need to use authorize operation, to generate the token.
<google-spreadsheets:config-with-oauth name="Google_Spreadsheets" consumerKey="${gs.clientid}" consumerSecret="${gs.clientsecret}" doc:name="Google
Spreadsheets" scope="https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/userinfo.email https://spreadsheets.google.com/feeds
https://docs.google.com/feeds https://www.googleapis.com/auth/spreadsheets.readonly https://www.googleapis.com/auth/spreadsheets
https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/userinfo.email">
<google-spreadsheets:oauth-callback-config domain="${oauth.host}" path="oauth2callback" async="true"/>
</google-spreadsheets:config-with-oauth>

6. Connecting Google API With Mule ESB

7. Connecting Google API With Mule ESB

8. Connecting Google API With Mule ESB

9. Connecting Google API With Mule ESB
Authorize operation will return tokenID and it can be read using flow
variable #[flowVars['OAuthAccessTokenId']]
Once Authorization is successful, you can use any operation can be performed depending on your requirement
and make sure you are sending token with every request to Google Spreadsheets API's.

10. Connecting Google API With Mule ESB
Sometime there can be case you need to use authorize operation in one flow and other operation in other flow.
In such case you need to use object store to store the tokenID generated during authorize operation and in can
retrieve from object store in other flow.
<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns:dw="http://www.mulesoft.org/schema/mule/ee/dw" xmlns:ws="http://www.mulesoft.org/schema/mule/ws" xmlns:file="http://www.mulesoft.org/schema/mule/file" xmlns:context="http://www.springframework.org/schema/context"xmlns:google-
spreadsheets="http://www.mulesoft.org/schema/mule/google-spreadsheets"xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
xmlns:spring="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/httphttp://www.mulesoft.org/schema/mule/http/current/mule-http.xsd
http://www.mulesoft.org/schema/mule/google-spreaadsheets http://www.mulesoft.org/schema/mule/google-spreadsheets/current/mule-google-spreadsheets.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-current.xsd
http://www.mulesoft.org/schema/mule/file http://www.mulesoft.org/schema/mule/file/current/mule-file.xsd
http://www.mulesoft.org/schema/mule/ws http://www.mulesoft.org/schema/mule/ws/current/mule-ws.xsd
http://www.mulesoft.org/schema/mule/ee/dwhttp://www.mulesoft.org/schema/mule/ee/dw/current/dw.xsd
http://www.mulesoft.org/schema/mule/google-spreadsheets http://www.mulesoft.org/schema/mule/google-spreadsheets/current/mule-google-spreadsheets.xsd">
<http:listener-configname="HTTP_Listener_Configuration" host="0.0.0.0" port="8081"doc:name="HTTPListenerConfiguration"/>
<google-spreadsheets:config-with-oauth name="Google_Spreadsheets" consumerKey="${gs.clientid}"consumerSecret="${gs.clientsecret}" doc:name="Google Spreadsheets" scope="https://www.googleapis.com/auth/userinfo.profile
https://www.googleapis.com/auth/userinfo.email https://spreadsheets.google.com/feeds https://docs.google.com/feeds https://www.googleapis.com/auth/spreadsheets.readonly https://www.googleapis.com/auth/spreadsheets
https://www.googleapis.com/auth/userinfo.profilehttps://www.googleapis.com/auth/userinfo.email">
<google-spreadsheets:oauth-callback-configdomain="${oauth.host}" path="oauth2callback" async="true"/>
</google-spreadsheets:config-with-oauth>a
<flow name="google-spreadsheet-apiFlow">
<http:listenerconfig-ref="HTTP_Listener_Configuration" path="/authorize" doc:name="HTTP" allowedMethods="GET"/>
<google-spreadsheets:authorizeconfig-ref="Google_Spreadsheets"doc:name="GoogleSpreadsheets" accessTokenUrl=" https://accounts.google.com/o/oauth2/token"authorizationUrl="https://accounts.google.com/o/oauth2/auth"/>
<loggermessage="#[payload]" level="INFO" doc:name="Logger"/>
<google-spreadsheets:get-all-cells-as-csv config-ref="Google_Spreadsheets" lineSeparator="|"spreadsheet="Employee" worksheet="Employee" accessTokenId="#[flowVars['OAuthAccessTokenId']]" doc:name="Google Spreadsheets"/>
<loggermessage="datafetched. #[payload]"level="INFO"doc:name="Logger"/>
</flow>
</mule>

11. Connecting Google API With Mule ESB
References
Google API Commons: https://github.com/mulesoft/google-api-commons
Google Calendar: https://github.com/mulesoft/google-calendar-connector
Google Contacts: https://github.com/mulesoft/google-contacts-connector
Google Cloud Messaging: https://github.com/mulesoft/google-cloud-messaging-connector
Google Drive: https://github.com/mulesoft/google-drive-connector
Gmail: https://github.com/mulesoft/gmail-connector
Google Prediction: https://github.com/mulesoft/google-prediction-connector
Google Spreadsheets: https://github.com/mulesoft/google-spreadsheets-connector
GoogleTasks: https://github.com/mulesoft/google-tasks-connector

12. ThankYou.