Available as of Camel 2.10
camel-test-blueprint does only support testing one CamelContext. So if you have 2 or more CamelContexts in your blueprint XML files, then first found CamelContext is used during testing.
Testing is a crucial part of any development or integration work. Camel supports the definition of Blueprint routes, but given Blueprint is an OSGi specific technology, writing unit tests is quite difficult. This library leverages PojoSR which provides a service registry without using a fully compliant OSGi container. This allows defining real unit tests (as opposed to integration tests using Pax Exam. Please make sure all test jars in you class path are OSGi bundle.
Also notice the use of
getBlueprintDescriptor to specify the location of the OSGi Blueprint XML file.
If you have multiple OSGi Blueprint XML files, then you can specify them with a comma-separated list in the
Here's the Blueprint XML file:
In order to define blueprint tests, add the following dependency in your pom:
By default PojoSR test container scans the test classpath for all the OSGi bundles available there. All the bundles with Blueprint descriptor files will be automatically started by the test container. If you would like to prevent particular bundles from being started by the test container, override the
getBundleFilter method, just as demonstrated on the snippet below.
Keep in mind that not specifying the Blueprint descriptor in the
getBlueprintDescriptor method will not prevent the test container from loading given descriptor. Bundle filter method is the proper way of filtering out bundles you don't want to start during the test.
Setting timeout when getting CamelContext
Available as of Camel 2.13.0/2.12.1/2.11.2
CamelBlueprintTestSupport waits 30 sec for Camel Context to be ready by default, now you can override this value in two ways:
- Globally, by setting
- Locally for each test, by overriding getCamelContextCreationTimeout method.
Adding services on startup
Available as of Camel 2.11.2/2.12.0
camel-test-blueprint you may do unit tests which requires using shared services which is not available during unit testing, but only in the real OSGi container, for example a shared
To make it easier to register services on startup, such as a standalone
DataSource or any other service, you can override the method
addServicesOnStartup when your unit test class extends
In the example below we register a service
org.apache.camel.test.blueprint.MyService using the name
myService having a property
beer=Carlsberg, as shown below:
The asService is a builder method that makes it easy to register a service with a single property. If you need more properties you can use the
asService method that takes a
Dictionary as argument. And if you do not need any properties, then just pass in
This allows us to use the service by calling a method on it from a Camel Bean component in a route as shown:
Notice the bean endpoint uses the service name
myService which was the name we registered the service as. You can also use the fully qualified class name instead, which is more common with OSGi.
And in the route we use the FQN name:
From Camel 2.16.0, an additional
addServicesOnStartup method is available to be overridden making it ideal for when needing to specify multiple services with the same interface.
asKeyValueService builder method can be used to construct the necessary parameters to create the service. The method takes in the name of the registered service, the object, and and a
Dictionary as arguments.