Chapter 177. Twitter

Twitter

Available as of Camel 2.10

The Twitter component enables the most useful features of the Twitter API by encapsulating Twitter4J. It allows direct, polling, or event-driven consumption of timelines, users, trends, and direct messages. Also, it supports producing messages as status updates or direct messages.

Twitter now requires the use of OAuth for all client application authentication. In order to use camel-twitter with your account, you'll need to create a new application within Twitter at https://dev.twitter.com/apps/new and grant the application access to your account. Finally, generate your access token and secret.

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

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-twitter</artifactId>
    <version>${camel-version}</version>
</dependency>

URI format

twitter://endpoint[?options]

TwitterComponent:

The twitter component can be configured with the Twitter account settings which is mandatory to configure before using. You can also configure these options directly in the endpoint.

Option	Description
`consumerKey`	The consumer key
`consumerSecret`	The consumer secret
`accessToken`	The access token
`accessTokenSecret`	The access token secret

Consumer Endpoints:

Rather than the endpoints returning a List through one single route exchange, camel-twitter creates one route exchange per returned object. As an example, if timeline/home results in five statuses, the route will be executed five times (once for each Status).

Endpoint	Context	Body Type	Notice
`directmessage`	direct, polling	`twitter4j.DirectMessage`
`search`	direct, polling	`twitter4j.Status`
`streaming/filter`	event, polling	`twitter4j.Status`
`streaming/sample`	event, polling	`twitter4j.Status`
`streaming/user`	event, polling	`twitter4j.Status` `twitter4j.DirectMessage` `twitter4j.UserList`	Camel 2.16: To receive tweets from protected users and accounts. Camel 2.17: DirectMessages, Favorites, Lists, Following events are now supported
`timeline/home`	direct, polling	`twitter4j.Status`
`timeline/mentions`	direct, polling	`twitter4j.Status`
`timeline/retweetsofme`	direct, polling	`twitter4j.Status`
`timeline/user`	direct, polling	`twitter4j.Status`

Producer Endpoints:

Endpoint	Body Type
`directmessage`	`String`
`search`	`List<twitter4j.Status>`
`timeline/user`	`String`

URI Options

Name	Default Value	Description
`type`	`direct`	direct, event, or polling
`delay`		Delay between polls. The value is 60 seconds by default. The value is in seconds for Camel 2.16 or older. And in milliseconds from Camel 2.17 onwards.
`consumerKey`	`null`	Consumer Key. Can also be configured on the `TwitterComponent` level instead.
`consumerSecret`	`null`	Consumer Secret. Can also be configured on the `TwitterComponent` level instead.
`accessToken`	`null`	Access Token. Can also be configured on the `TwitterComponent` level instead.
`accessTokenSecret`	`null`	Access Token Secret. Can also be configured on the `TwitterComponent` level instead.
`user`	`null`	Username, used for user timeline consumption, direct message production, etc.
`locations`	`null`	'lat,lon;lat,lon;...' Bounding boxes, created by pairs of lat/lons. Can be used for streaming/filter
`keywords`	`null`	'foo1,foo2,foo3...' Can be used for search and streaming/filter. See Advanced search for keywords syntax for searching with for example OR.
`userIds`	`null`	'username,username...' Can be used for streaming/filter
`filterOld`	`true`	Filter out old tweets, that has previously been polled. This state is stored in memory only, and based on last tweet id. Since Camel 2.11.0 The search producer supports this option
`sinceId`	`1`	Camel 2.11.0: The last tweet id which will be used for pulling the tweets. It is useful when the camel route is restarted after a long running.
`lang`	`null`	Camel 2.11.0: The lang string ISO_639-1 which will be used for searching
`count`	`null`	Camel 2.11.0: Limiting number of results per page.
`numberOfPages`	`1`	Camel 2.11.0: The number of pages result which you want camel-twitter to consume.
`httpProxyHost`	`null`	Camel 2.12.3: The http proxy host which can be used for the camel-twitter.
`httpProxyPort`	`null`	Camel 2.12.3: The http proxy port which can be used for the camel-twitter.
`httpProxyUser`	`null`	Camel 2.12.3: The http proxy user which can be used for the camel-twitter.
`httpProxyPassword`	`null`	Camel 2.12.3: The http proxy password which can be used for the camel-twitter.
`latitude`		Camel 2.16: Used by the non-stream geography search to search by latitude. You need to configure all the following options: `longitude`, `latitude`, `radius`, and `distanceMetric`.
`longitude`		Camel 2.16: Used by the non-stream geography search to search by longitude. You need to configure all the following options: `longitude`, `latitude`, `radius`, and `distanceMetric`.
`radius`		Camel 2.16: Used by the non-stream geography search to search by radius. You need to configure all the following options: `longitude`, `latitude`, `radius`, and `distanceMetric`.
`distanceMetric`	`km`	Camel 2.16: Used by the non-stream geography search, to search by radius using the configured metrics. The unit can either be `mi` for miles, or `km` for kilometers. You need to configure all the following options: `longitude`, `latitude`, `radius`, and `distanceMetric`.

Message header

Name	Description
`CamelTwitterKeywords`	This header is used by the search producer to change the search key words dynamically.
`CamelTwitterSearchLanguage`	Camel 2.11.0: This header can override the option of `lang` which set the search language for the search endpoint dynamically
`CamelTwitterCount`	Camel 2.11.0 This header can override the option of `count` which sets the max twitters that will be returned.
`CamelTwitterNumberOfPages`	Camel 2.11.0 This header can converrid the option of `numberOfPages` which sets how many pages we want to twitter returns.
`CamelTwitterNumberOfPages`	Camel 2.17.0: The type of event received (see `org.apache.camel.component.twitter.consumer.TwitterEventType`).
`CamelTwitterNumberOfPages`	Camel 2.17.0: Identifies a party.
`CamelTwitterNumberOfPages`	Camel 2.17.0: Identifies a party role.

Message body

All message bodies utilize objects provided by the Twitter4J API.

API rate limits

Twitter REST APIs encapsulated by Twitter4J are subjected to API Rate Limiting. You can find the per method limits in the API Rate Limits documentation. Note that endpoints/resources not listed in that page are default to 15 requests per allotted user per window.

To create a status update within your Twitter profile, send this producer a String body.

from("direct:foo")
  .to("twitter://timeline/user?consumerKey=[s]&consumerSecret=[s]&accessToken=[s]&accessTokenSecret=[s]);

To poll, every 60 sec., all statuses on your home timeline:

from("twitter://timeline/home?type=polling&delay=60&consumerKey=[s]&consumerSecret=[s]&accessToken=[s]&accessTokenSecret=[s]")
  .to("bean:blah");

To search for all statuses with the keyword 'camel':

from("twitter://search?type=direct&keywords=camel&consumerKey=[s]&consumerSecret=[s]&accessToken=[s]&accessTokenSecret=[s]")
  .to("bean:blah");

Searching using a producer with static keywords

from("direct:foo")
  .to("twitter://search?keywords=camel&consumerKey=[s]&consumerSecret=[s]&accessToken=[s]&accessTokenSecret=[s]");

Searching using a producer with dynamic keywords from header

In the bar header we have the keywords we want to search, so we can assign this value to the CamelTwitterKeywords header.

from("direct:foo")
  .setHeader("CamelTwitterKeywords", header("bar"))
  .to("twitter://search?consumerKey=[s]&consumerSecret=[s]&accessToken=[s]&accessTokenSecret=[s]");

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