GitHub Component

Available as of Camel version 2.15

The GitHub component interacts with the GitHub API by encapsulating http://org.eclipse.egit.github.core[egit-github]. It currently provides polling for new pull requests, pull request comments, tags, and commits.  It is also able to produce comments on pull requests, as well as close the pull request entirely.

Rather than webhooks, this endpoint relies on simple polling. Reasons include:

  • Concern for reliability/stability

  • The types of payloads we’re polling aren’t typically large (plus, paging is available in the API)

  • The need to support apps running somewhere not publicly accessible where a webhook would fail

Note that the GitHub API is fairly expansive.  Therefore, this component could be easily expanded to provide additional interactions.

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

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

URI format

github://endpoint[?options]

Mandatory Options:

Note that these can be configured directly through the endpoint.

The GitHub component has no options.

The GitHub endpoint is configured using URI syntax:

github:type/branchName

with the following path and query parameters:

Path Parameters (2 parameters):

Name Description Default Type

type

Required What git operation to execute

GitHubType

branchName

Name of branch

String

Query Parameters (12 parameters):

Name Description Default Type

oauthToken (common)

GitHub OAuth token, required unless username & password are provided

String

password (common)

GitHub password, required unless oauthToken is provided

String

repoName (common)

Required GitHub repository name

String

repoOwner (common)

Required GitHub repository owner (organization)

String

username (common)

GitHub username, required unless oauthToken is provided

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

encoding (producer)

To use the given encoding when getting a git commit file

String

state (producer)

To set git commit status state

String

targetUrl (producer)

To set git commit status target url

String

synchronous (advanced)

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

false

boolean

Spring Boot Auto-Configuration

When using Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-github-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 2 options, which are listed below.

Name Description Default Type

camel.component.github.enabled

Enable github component

true

Boolean

camel.component.github.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

Consumer Endpoints:

Endpoint Context Body Type

pullRequest

polling

org.eclipse.egit.github.core.PullRequest

pullRequestComment

polling

org.eclipse.egit.github.core.Comment (comment on the general pull request discussion) or org.eclipse.egit.github.core.CommitComment (inline comment on a pull request diff)

tag

polling

org.eclipse.egit.github.core.RepositoryTag

commit

polling

org.eclipse.egit.github.core.RepositoryCommit

Producer Endpoints:

Endpoint Body Message Headers

pullRequestComment

String (comment text)

- GitHubPullRequest (integer) (REQUIRED): Pull request number.

- GitHubInResponseTo (integer): Required if responding to another inline comment on the pull request diff. If left off, a general comment on the pull request discussion is assumed.

closePullRequest

none

- GitHubPullRequest (integer) (REQUIRED): Pull request number.

createIssue (From Camel 2.18)

String (issue body text)

- GitHubIssueTitle (String) (REQUIRED): Issue Title.