Git

Since Camel 2.16

Both producer and consumer are supported

The Git component allows you to work with a generic Git repository.

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

URI Format

git://localRepositoryPath[?options]

URI Options

The producer allows to do operations on a specific repository.
The consumer allows consuming commits, tags and branches on a specific repository.

Configuring Options

Camel components are configured on two separate levels:

  • component level

  • endpoint level

Configuring Component Options

The component level is the highest level which holds general and common configurations that are inherited by the endpoints. For example a component may have security settings, credentials for authentication, urls for network connection and so forth.

Some components only have a few options, and others may have many. Because components typically have pre configured defaults that are commonly used, then you may often only need to configure a few options on a component; or none at all.

Configuring components can be done with the Component DSL, in a configuration file (application.properties|yaml), or directly with Java code.

Configuring Endpoint Options

Where you find yourself configuring the most is on endpoints, as endpoints often have many options, which allows you to configure what you need the endpoint to do. The options are also categorized into whether the endpoint is used as consumer (from) or as a producer (to), or used for both.

Configuring endpoints is most often done directly in the endpoint URI as path and query parameters. You can also use the Endpoint DSL as a type safe way of configuring endpoints.

A good practice when configuring options is to use Property Placeholders, which allows to not hardcode urls, port numbers, sensitive information, and other settings. In other words placeholders allows to externalize the configuration from your code, and gives more flexibility and reuse.

The following two sections lists all the options, firstly for the component followed by the endpoint.

Component Options

The Git component supports 3 options, which are listed below.

Name Description Default Type

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.

boolean

lazyStartProducer (producer)

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

boolean

autowiredEnabled (advanced)

Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc.

boolean

Endpoint Options

The Git endpoint is configured using URI syntax:

git:localPath

with the following path and query parameters:

Path Parameters (1 parameters)

Name Description Default Type

localPath (common)

Required Local repository path.

String

Query Parameters (13 parameters)

Name Description Default Type

branchName (common)

The branch name to work on.

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.

boolean

type (consumer)

The consumer type.

Enum values:

  • commit

  • tag

  • branch

GitType

exceptionHandler (consumer (advanced))

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 (advanced))

Sets the exchange pattern when the consumer creates an exchange.

Enum values:

  • InOnly

  • InOut

  • InOptionalOut

ExchangePattern

allowEmpty (producer)

The flag to manage empty git commits.

boolean

lazyStartProducer (producer)

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

boolean

operation (producer)

The operation to do on the repository.

Enum values:

  • clone

  • init

  • add

  • remove

  • commit

  • commitAll

  • createBranch

  • deleteBranch

  • createTag

  • deleteTag

  • status

  • log

  • push

  • pull

  • showBranches

  • cherryPick

  • remoteAdd

  • remoteList

String

password (producer)

Remote repository password.

String

remoteName (producer)

The remote repository name to use in particular operation like pull.

String

remotePath (producer)

The remote repository path.

String

tagName (producer)

The tag name to work on.

String

username (producer)

Remote repository username.

String

Message Headers

Name Default Value Type Context Description

CamelGitOperation

null

String

Producer

The operation to do on a repository, if not specified as endpoint option

CamelGitFilename

null

String

Producer

The file name in an add operation

CamelGitCommitMessage

null

String

Producer

The commit message related in a commit operation

CamelGitCommitUsername

null

String

Producer

The commit username in a commit operation

CamelGitCommitEmail

null

String

Producer

The commit email in a commit operation

CamelGitCommitId

null

String

Producer

The commit id

CamelGitAllowEmpty

null

Boolean

Producer

The flag to manage empty git commits

Producer Example

Below is an example route of a producer that add a file test.java to a local repository, commit it with a specific message on master branch and then push it to remote repository.

from("direct:start")
    .setHeader(GitConstants.GIT_FILE_NAME, constant("test.java"))
    .to("git:///tmp/testRepo?operation=add")
    .setHeader(GitConstants.GIT_COMMIT_MESSAGE, constant("first commit"))
    .to("git:///tmp/testRepo?operation=commit")
    .to("git:///tmp/testRepo?operation=push&remotePath=https://foo.com/test/test.git&username=xxx&password=xxx")
    .to("git:///tmp/testRepo?operation=createTag&tagName=myTag")
    .to("git:///tmp/testRepo?operation=pushTag&tagName=myTag&remoteName=origin")

Consumer Example

Below is an example route of a consumer that consumes commit:

from("git:///tmp/testRepo?type=commit")
    .to(....)

Spring Boot Auto-Configuration

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

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

The component supports 4 options, which are listed below.

Name Description Default Type

camel.component.git.autowired-enabled

Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc.

true

Boolean

camel.component.git.bridge-error-handler

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

camel.component.git.enabled

Whether to enable auto configuration of the git component. This is enabled by default.

Boolean

camel.component.git.lazy-start-producer

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

Boolean