Configure cassandra-unit with specific version of Hector and Cassandra.

[marccarre]

Hi,

To avoid all the:

• NoSuchMethodException
• IncompatibleClassChangeError
• etc.

due to conflicting dependencies, would it be possible to have a way to configure cassandra-unit with the versions used in client projects?

I guess this would also avoid having to release new versions of cassandra-unit just to upgrade to different versions of Hector/Cassandra.

Thanks & Regards,

Marc.

P.S. : Happy to help implementing this, provided some guidance.

---

EDIT:

As a workaround, Maven exclusions work on cassandra-unit 1.1.12, using the cassandra-all 1.0.7 and hector-core 1.0-5 in all my modules:

<dependency>
    <groupId>org.cassandraunit</groupId>
    <artifactId>cassandra-unit</artifactId>
    <scope>test</scope>
    <exclusions>
        <exclusion>
            <groupId>org.apache.cassandra</groupId>
            <artifactId>cassandra-all</artifactId>
        </exclusion>
        <exclusion>
            <groupId>org.hectorclient</groupId>
            <artifactId>hector-core</artifactId>
        </exclusion>
        <exclusion>
            <groupId>com.googlecode.concurrentlinkedhashmap</groupId>
            <artifactId>concurrentlinkedhashmap-lru</artifactId>
        </exclusion>
    </exclusions>
</dependency>

[jsevellec]

Hi Marc,

I think it's not a workaround but the simplest solution to deal with that problem.

[marccarre]

Hi Jeremy,

Thanks for your reply.
I guess it could be useful to add this to the wiki, under a Troubleshooting / FAQ section?
Let me know if I can help with this.

Besides, after having migrated my projects to cassandra-all 1.1.5, I am now having the below issue when running my unit tests:

java.lang.NoSuchMethodError: org.yaml.snakeyaml.Yaml.loadAs(Ljava/io/InputStream;Ljava/lang/Class;)Ljava/lang/Object;
    at org.cassandraunit.dataset.yaml.AbstractYamlDataSet.getParsedKeyspace(AbstractYamlDataSet.java:32)
    at org.cassandraunit.dataset.commons.AbstractCommonsParserDataSet.getKeyspace(AbstractCommonsParserDataSet.java:30)
    at org.cassandraunit.DataLoader.load(DataLoader.java:59)
    at org.cassandraunit.DataLoader.load(DataLoader.java:55)

... as it seems, cassandra-all 1.1.5 is using:

<dependency>
    <groupId>org.yaml</groupId>
    <artifactId>snakeyaml</artifactId>
    <version>1.6</version>
</dependency>

... while cassandra-unit 1.1.1.2 is using:

<dependency>
    <groupId>org.yaml</groupId>
    <artifactId>snakeyaml</artifactId>
    <version>1.9</version>
</dependency>

Adding the below at the very end of my dependencies block fixed it, though:

<dependency>
    <groupId>org.yaml</groupId>
    <artifactId>snakeyaml</artifactId>
    <version>1.9</version>
    <scope>test</scope>
</dependency>

and hasn't been conflicting with Cassandra (yet?).

Cheers,

Marc.

---

EDIT:
Just edited the documentation with some explanations and an example.
See also this page