Chapter 119. Google Calendar Component Available as of Camel version 2.15 The Google Calendar component provides access to Google Calendar via the Google Calendar Web APIs . Google Calendar 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: 119.1. 1. Google Calendar Options The Google Calendar component supports 3 options, which are listed below. Name Description Default Type configuration (common) To use the shared configuration GoogleCalendar Configuration clientFactory (advanced) To use the GoogleCalendarClientFactory as factory for creating the client. Will by default use BatchGoogleCalendarClientFactory GoogleCalendarClient 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 Calendar endpoint is configured using URI syntax: with the following path and query parameters: 119.1.1. Path Parameters (2 parameters): Name Description Default Type apiName Required What kind of operation to perform GoogleCalendarApiName methodName Required What sub operation to use for the selected operation String 119.1.2. Query Parameters (14 parameters): Name Description Default Type accessToken (common) OAuth 2 access token. This typically expires after an hour so refreshToken is recommended for long term usage. String applicationName (common) Google calendar application name. Example would be camel-google-calendar/1.0 String clientId (common) Client ID of the calendar application String clientSecret (common) Client secret of the calendar application String emailAddress (common) The emailAddress of the Google Service Account. String inBody (common) Sets the name of a parameter to be passed in the exchange In Body String p12FileName (common) The name of the p12 file which has the private key to use with the Google Service Account. String refreshToken (common) 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 (common) Specifies the level of permissions you want a calendar application to have to a user account. You can separate multiple scopes by comma. See https://developers.google.com/google-apps/calendar/auth for more info. https://www.googleapis.com/auth/calendar String user (common) The email address of the user the application is trying to impersonate in the service account flow 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 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 synchronous (advanced) Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported). false boolean 119.2. Spring Boot Auto-Configuration The component supports 14 options, which are listed below. Name Description Default Type camel.component.google-calendar.client-factory To use the GoogleCalendarClientFactory as factory for creating the client. Will by default use BatchGoogleCalendarClientFactory. The option is a org.apache.camel.component.google.calendar.GoogleCalendarClientFactory type. String camel.component.google-calendar.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-calendar.configuration.api-name What kind of operation to perform GoogleCalendarApiName camel.component.google-calendar.configuration.application-name Google calendar application name. Example would be camel-google-calendar/1.0 String camel.component.google-calendar.configuration.client-id Client ID of the calendar application String camel.component.google-calendar.configuration.client-secret Client secret of the calendar application String camel.component.google-calendar.configuration.email-address The emailAddress of the Google Service Account. String camel.component.google-calendar.configuration.method-name What sub operation to use for the selected operation String camel.component.google-calendar.configuration.p12-file-name The name of the p12 file which has the private key to use with the Google Service Account. String camel.component.google-calendar.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-calendar.configuration.scopes Specifies the level of permissions you want a calendar application to have to a user account. You can separate multiple scopes by comma. See https://developers.google.com/google-apps/calendar/auth for more info. https://www.googleapis.com/auth/calendar String camel.component.google-calendar.configuration.user The email address of the user the application is trying to impersonate in the service account flow String camel.component.google-calendar.enabled Enable google-calendar component true Boolean camel.component.google-calendar.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 119.3. URI Format The GoogleCalendar Component uses the following URI format: Endpoint prefix can be one of: acl calendars channels colors events freebusy list settings 119.4. Producer Endpoints Producer endpoints can use endpoint prefixes followed by endpoint names and associated options described . A shorthand alias can be used for some endpoints. The endpoint URI MUST contain a prefix. Endpoint options that are not mandatory are denoted by []. When there are no mandatory options for an endpoint, one of the set of [] options MUST be provided. Producer endpoints can also use a special option inBody that in turn should contain the name of the endpoint option whose value will be contained in the Camel Exchange In message. Any of the endpoint options can be provided in either the endpoint URI, or dynamically in a message header. The message header name must be of the format CamelGoogleCalendar.<option> . Note that the inBody option overrides message header, i.e. the endpoint option inBody=option would override a CamelGoogleCalendar.option header. 119.5. Consumer Endpoints Any of the producer endpoints can be used as a consumer endpoint. Consumer endpoints can use Scheduled Poll Consumer Options with a consumer. prefix to schedule endpoint invocation. Consumer endpoints that return an array or collection will generate one exchange per element, and their routes will be executed once for each exchange. 119.6. Message Headers Any URI option can be provided in a message header for producer endpoints with a CamelGoogleCalendar. prefix. 119.7. Message Body All result message bodies utilize objects provided by the underlying APIs used by the GoogleCalendarComponent. Producer endpoints can specify the option name for incoming message body in the inBody endpoint URI parameter. For endpoints that return an array or collection, a consumer endpoint will map every element to distinct messages.

Commands:
<dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-google-calendar</artifactId> <version>2.15.0</version> </dependency>
google-calendar:apiName/methodName
google-calendar://endpoint-prefix/endpoint?[options]