Camel Report Maven Plugin

The Camel Report Maven Plugin supports the following goals

camel-report:validate - To validate your source code for invalid Camel endpoint uris
camel-report:route-coverage - To report the coverage of your Camel routes after unit testing

camel-report:validate

For validating the source code for mis-configured Camel:

endpoint uris
simple expressions or predicates
duplicate route ids
seda/direct endpoint pairs
configuration in properties files

Then you can run the validate goal from the command line or from within your Java editor such as IDEA or Eclipse.

mvn camel-report:validate

You can also enable the plugin to run automatically as part of the build to catch these errors.

<plugin>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-report-maven-plugin</artifactId>
  <executions>
    <execution>
      <phase>process-classes</phase>
      <goals>
        <goal>validate</goal>
      </goals>
    </execution>
  </executions>
</plugin>

The phase determines when the plugin runs. In the sample above the phase is process-classes which runs after the compilation of the main source code.

The maven plugin can also be configured to validate the test source code , which means that the phase should be changed accordingly to process-test-classes as shown below:

<plugin>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-report-maven-plugin</artifactId>
  <executions>
    <execution>
      <configuration>
        <includeTest>true</includeTest>
      </configuration>
      <phase>process-test-classes</phase>
      <goals>
        <goal>validate</goal>
      </goals>
    </execution>
  </executions>
</plugin>

Running the goal on any Maven project

You can also run the validate goal on any Maven project without having to add the plugin to the pom.xml file. Doing so requires to specify the plugin using its fully qualified name. For example to run the goal on the camel-example-cdi from Apache Camel you can run

$cd camel-example-cdi
$mvn org.apache.camel:camel-report-maven-plugin:2.20.0:validate

which then runs and outputs the following:

[INFO] ------------------------------------------------------------------------
[INFO] Building Camel :: Example :: CDI 3.0.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- camel-report-maven-plugin:3.0.0:validate (default-cli) @ camel-example-cdi ---
[INFO] Endpoint validation success: (4 = passed, 0 = invalid, 0 = incapable, 0 = unknown components)
[INFO] Simple validation success: (0 = passed, 0 = invalid)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

The validation passed, and 4 endpoints was validated. Now suppose we made a typo in one of the Camel endpoint uris in the source code, such as:

@Uri("timer:foo?period=5000")

is changed to include a typo error in the period option

@Uri("timer:foo?perid=5000")

And when running the validate goal again reports the following:

[INFO] ------------------------------------------------------------------------
[INFO] Building Camel :: Example :: CDI 3.0.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- camel-report-maven-plugin:3.0.0:validate (default-cli) @ camel-example-cdi ---
[WARNING] Endpoint validation error at: org.apache.camel.example.cdi.MyRoutes(MyRoutes.java:32)

	timer:foo?perid=5000

	                   perid    Unknown option. Did you mean: [period]


[WARNING] Endpoint validation error: (3 = passed, 1 = invalid, 0 = incapable, 0 = unknown components)
[INFO] Simple validation success: (0 = passed, 0 = invalid)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

Options

The maven plugin validate goal supports the following options which can be configured from the command line (use -D syntax), or defined in the pom.xml file in the <configuration> tag.

Parameter

Default Value

Description

skip

false

Whether to skip the plugin execution.

downloadVersion

true

Whether to allow downloading Camel catalog version from the internet. This is needed if the project uses a different Camel version than this plugin is using by default.

failOnError

false

Whether to fail if invalid Camel endpoints was found. By default the plugin logs the errors at WARN level.

coverageThreshold

100

The minimum route coverage in percent when using failOnError.

overallCoverageThreshold

The minimum coverage across all routes in percent when using failOnError.

logUnparseable

false

Whether to log endpoint URIs which was un-parsable and therefore not possible to validate.

includeJava

true

Whether to include Java files to be validated for invalid Camel endpoints.

includeXml

true

Whether to include XML files to be validated for invalid Camel endpoints.

includeTest

false

Whether to include test source code.

includes

To filter the names of java and xml files to only include files matching any of the given list of patterns (wildcard and regular expression). Multiple values can be separated by comma.

excludes

To filter the names of java and xml files to exclude files matching any of the given list of patterns (wildcard and regular expression). Multiple values can be separated by comma.

ignoreUnknownComponent

true

Whether to ignore unknown components.

ignoreIncapable

true

Whether to ignore incapable of parsing the endpoint uri or simple expression.

ignoreLenientProperties

true

Whether to ignore components that uses lenient properties. When this is true, then the uri validation is stricter but would fail on properties that are not part of the component but in the uri because of using lenient properties. For example using the HTTP components to provide query parameters in the endpoint uri.

ignoreDeprecated

true

Whether to ignore deprecated options being used in the endpoint uri.

duplicateRouteId

true

Whether to validate for duplicate route ids. Route ids should be unique and if there are duplicates then Camel will fail to startup.

directOrSedaPairCheck

true

Whether to validate direct/seda endpoints sending to non existing consumers.

configurationFiles

application.properties

Location of configuration files to validate. The default is application.properties. Multiple values can be separated by comma and use wildcard pattern matching.

showAll

false

Whether to show all endpoints and simple expressions (both invalid and valid).

downloadTransitiveArtifacts

false

When sourcesArtifacts are declared, this flag can be used to download transitive dependencies, carefully enable this flag since it will try to download the whole dependency tree.

sourcesArtifacts

List of sources transitive dependencies that contain camel routes, this option can be used to download extra dependencies that contain camel route that your project may depend on.

extraMavenRepositories

List of extra maven repositories.

For example to turn on ignoring usage of deprecated options from the command line, you can run:

$mvn camel-report:validate -Dcamel.ignoreDeprecated=true

Notice that you must prefix the -D command argument with camel., eg camel.ignoreDeprecated as the option name.

Validating include test

If you have a Maven project then you can run the plugin to validate the endpoints in the unit test source code as well. You can pass in the options using -D style as shown:

$cd myproject
$mvn org.apache.camel:camel-report-maven-plugin:3.0.0:validate -Dcamel.includeTest=true

Validate Apache Camel routes in transitive dependencies

If your routes use direct or seda endpoints that are not present in the current project, but the routes are declared into a dependency of your project, you can edit the plugin configuration accordingly so that these routes can be taken into account by the Camel validate plugin. In particular, in order to use the validate plugin with transitive dependencies, sources jars are needed, for example:

Given the following Camel route from("direct:in").to("direct:out") defined in the current project
The route from("direct:out") is declared into a dependency of your project, for example my.company:routes-dependency:1.0
If routes-dependency sources are released into a maven repository, the following plugin configuration can be used:

<plugin>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-report-maven-plugin</artifactId>
  <executions>
    <execution>
      <phase>package</phase>
      <goals>
        <goal>validate</goal>
      </goals>
      <configuration>
        <sourcesArtifacts>
          <sourcesArtifact>my.company:routes-dependency:jar:sources:1.0</sourcesArtifact>
        </sourcesArtifacts>
        <extraMavenRepositories>
          <extraMavenRepository>http://internal.repo:8080/maven</extraMavenRepository>
        </extraMavenRepositories>
      </configuration>
    </execution>
  </executions>
</plugin>

camel-report:route-coverage

For generating a report of the coverage of your Camel routes from unit testing. In the same manner you can generate Java code coverage reports, then this is the same but for Camel routes. You can therefore use this to know which parts of your Camel routes have been used or not.

Camel uses JMX to capture metrics during tests which are used for calculating route coverage. You must have camel-management JAR on the classpath (can be test scoped) such as by declaring the following Maven dependency in your pom.xml file:

<!-- JMX is needed for route coverage testing -->
<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-management</artifactId>
    <scope>test</scope>
</dependency>

Enabling route coverage

You can enable route coverage while running unit tests either by:

setting global JVM system property enabling for all test classes
using @EnableRouteCoverage annotation per test class if using camel-test-spring-junit5 module
overriding isDumpRouteCoverage method per test class if using camel-test module

Enabling via JVM system property

You can turn on the JVM system property CamelTestRouteCoverage to enable route coverage for all tests cases. This can be done either in the configuration of the maven-surefire-plugin:

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-surefire-plugin</artifactId>
  <configuration>
    <systemPropertyVariables>
      <CamelTestRouteCoverage>true</CamelTestRouteCoverage>
    </systemPropertyVariables>
  </configuration>
</plugin>

Or from the command line when running tests:

mvn clean test -DCamelTestRouteCoverage=true

Enabling via @EnableRouteCoverage annotation

You need to enable route coverage in the unit tests classes. You can do this by adding the @EnableRouteCoverage annotation to the test class if you are testing using camel-test-spring-junit5:

@RunWith(CamelSpringBootRunner.class)
@SpringBootTest(classes = SampleCamelApplication.class)
@EnableRouteCoverage
public class FooApplicationTest {

Enabling via isDumpRouteCoverage method

However if you are using camel-test and your unit tests are extending CamelTestSupport then you can turn on route coverage as shown:

@Override
public boolean isDumpRouteCoverage() {
    return true;
}

Routes that can be route coveraged must have an unique id assigned, in other words you cannot use anonymous routes.

You do this using routeId in Java DSL:

from("jms:queue:cheese").routeId("cheesy")
  .to("log:foo")
  ...

And in XML DSL you just assign the route id via the id attribute

<route id="cheesy">
  <from uri="jms:queue:cheese"/>
  <to uri="log:foo"/>
  ...
</route>

Generating route coverage report

After unit testing with:

mvn test

You can then run the goal to report the route coverage

mvn camel-report:route-coverage

Which then reports which routes has missing route coverage with precise source code line reporting:

[INFO] --- camel-camel-report-plugin:3.0.0:route-coverage (default-cli) @ camel-example-spring-boot-xml ---
[INFO] Discovered 1 routes
[INFO] Route coverage summary:

File:	src/main/resources/my-camel.xml
RouteId:	hello

  Line #      Count   Route
  ------      -----   -----
      28          1   from
      29          1     transform
      32          1     filter
      34          0       to
      36          1     to

Coverage: 4 out of 5 (80.0%)

Here we can see that the 2nd last line with to has 0 in the count column, and therefore is not covered. We can also see that this is one line 34 in the source code file, which is in the my-camel.xml XML file.

Options

The maven plugin coverage goal supports the following options which can be configured from the command line (use -D syntax), or defined in the pom.xml file in the <configuration> tag.

Parameter

Default Value

Description

skip

false

Whether to skip the plugin execution.

failOnError

false

Whether to fail if any of the routes has not 100% coverage.

includeTest

false

Whether to include test source code.

includes

To filter the names of java and xml files to only include files matching any of the given list of patterns (wildcard and regular expression). Multiple values can be separated by comma.

excludes

To filter the names of java and xml files to exclude files matching any of the given list of patterns (wildcard and regular expression). Multiple values can be separated by comma.

anonymousRoutes

false

Whether to allow anonymous routes (routes without any route id assigned). By using route id’s then it is safer to match the route cover data with the route source code. Anonymous routes are less safe to use for route coverage as its harder to know exactly which route that was tested corresponds to which of the routes from the source code.

generateJacocoXmlReport

false

Whether to generate a coverage-report in Jacoco XML format. When enabled it will generate the file: target/site/jacoco/xmlJacoco.xml

generateHtmlReport

false

Whether to generate a coverage-report in HTML format. When enabled it will generate the file: target/site/route-coverage/html/index.html