Fix Maven issue

[BenRomberg]

jrestless sounds really promising. Unfortunately it's not straightforward to get it running with Maven.

With the following pom.xml:

    <dependencies>
        <dependency>
            <groupId>com.jrestless.aws</groupId>
            <artifactId>jrestless-aws-gateway-handler</artifactId>
            <version>0.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-json-jackson</artifactId>
            <version>2.23</version>
        </dependency>
    </dependencies>
    
    <repositories>
        <repository>
            <id>jcenter</id>
            <url>http://jcenter.bintray.com</url>
        </repository>
    </repositories>

The build results in [ERROR] Failed to execute goal on project ***: Could not resolve dependencies for project ***: Could not find artifact org.glassfish.jersey.containers:project:jar:2.23 in jcenter (http://jcenter.bintray.com) -> [Help 1].

The problem is that org.glassfish.jersey.containers:project is being referenced within com.jrestless.core:jrestless-core-container as a dependency. Maven then thinks this is a dependency of type jar, where in fact it is of type pom. When trying to download the corresponding jar file, it gets a 404 from both jcenter and Maven Central and throws the error above.

The following workaround fixes the issue:

    <dependencies>
        <dependency>
            <groupId>com.jrestless.aws</groupId>
            <artifactId>jrestless-aws-gateway-handler</artifactId>
            <version>0.3.0</version>
            <exclusions>
                <exclusion>
                    <groupId>org.glassfish.jersey.containers</groupId>
                    <artifactId>project</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-server</artifactId>
            <version>2.23</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-json-jackson</artifactId>
            <version>2.23</version>
        </dependency>
    </dependencies>

It would be great if you could fix the dependencies to use jersey-server directly instead of relying on the project parent POM, so that the workaround is no longer needed in future versions. Thanks!

[bbilger]

thanks for reporting!
Your proposed fix sounds reasonable. I will take a look and will fix it ASAP.

[bbilger]

@BenRomberg
I fixed the dependency as suggested by you. I will also add maven examples for the next release.
FYI: the next release is planned for the end of next week.

[bbilger]

@BenRomberg
I updated the examples to work with Maven.
See https://github.com/bbilger/jrestless-examples#build
For example:

git clone https://github.com/bbilger/jrestless-examples.git
cd jrestless-examples
find . -path ./.git -prune -o -name 'serverless.yml' -type f -exec sed -i 's/artifact: build\/distributions\/\([a-z0-9-]\+\)\.zip/artifact: target\/\1.jar/' {} +
cd aws/gateway/aws-gateway-showcase
mvn package
serverless deploy
curl https://YOUR_ID.execute-api.YOUR_REGION.amazonaws.com/dev/api/info

I had some trouble getting the examples running with Maven. In particular I had to configure the Maven shade plugin as follows:

<configuration>
   <createDependencyReducedPom>false</createDependencyReducedPom>
  <!-- http://stackoverflow.com/questions/29107376/jersey-problems-with-maven-shade-plugin -->
  <transformers>
    <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
    </transformers>
</configuration>

See https://github.com/bbilger/jrestless-examples/blob/master/pom.xml#L48

Let me know if you have any issues with Maven.

[BenRomberg]

Thanks @bbilger, works as expected!