fongo not compatible with 3.7 driver version

[zigzago]

MongoOperation, MongoDatabaseImpl, MongoCollectionImpl, etc. have moved to com.mongodb.client.internal package...

[twillouer]

can you try with driver37 branch ?

[zigzago]

my tests pass with driver37 branch, thanks! It would be nice to have a first fongo release for 3.7 :)

[d0x]

@hoffrocket any plans about merging his PR or supporting 3.7 in general?

[markbigler]

There are other issues adressing the same topic: #357

@twillouer any news about supporting mongodb driver 3.7+?

[bsautel]

I am also facing this issue that prevents me from upgrading to Spring Boot 2.1.0.

I tried to test using the driver37 branch, but I could not build it with Maven. I get the following output:

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Erreur : impossible de trouver ou charger la classe principale org.apache.maven.surefire.booter.ForkedBooter

Results :

Tests run: 0, Failures: 0, Errors: 0, Skipped: 0

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------

The error message is in french, it tells that it was impossible to find the main class org.apache.maven.surefire.booter.ForkedBooter.

I would have used the manually built jar as a workaround until the new Fongo release is published on the Maven Central repository, but this error prevents me from testing this workaround.

[kiwisincebirth]

Same issue for me on Spring Boot 2.1.0 mongo db driver 3.8.2 and Java 8. I am on the "fongo-2.2.0-RC2" release.

Caused by: java.lang.NoClassDefFoundError: com/mongodb/OperationExecutor
at com.github.fakemongo.Fongo.createMongo(Fongo.java:190)

[bsautel]

I finally could build the driver37 branch thanks to the -DskipTests=true Maven option 🙈.

I tested it with Spring Boot 2.1.0 (driver 3.8.2) and it does not work. I get this error:

java.lang.AbstractMethodError: com.mongodb.client.internal.FongoOperationExecutor.execute(Lcom/mongodb/operation/ReadOperation;Lcom/mongodb/ReadPreference;Lcom/mongodb/ReadConcern;)Ljava/lang/Object;
	at com.mongodb.DBCursor.initializeCursor(DBCursor.java:896)
	at com.mongodb.DBCursor.hasNext(DBCursor.java:148)
	at com.mongodb.DBCursor.one(DBCursor.java:697)
	at com.mongodb.DBCollection.findOne(DBCollection.java:845)
	at com.mongodb.DBCollection.findOne(DBCollection.java:805)
	at com.mongodb.DBCollection.findOne(DBCollection.java:748)
	at com.mongodb.FongoDBCollection.createIndex(FongoDBCollection.java:522)
	at com.mongodb.FongoDBCollection.<init>(FongoDBCollection.java:93)
	at com.mongodb.FongoDB.doGetCollection(FongoDB.java:96)
	at com.mongodb.FongoDB.doGetCollection(FongoDB.java:87)
	at com.mongodb.FongoDB.getCollection(FongoDB.java:82)
	at com.mongodb.client.internal.FongoMongoCollection.<init>(FongoMongoCollection.java:32)
	at com.mongodb.client.internal.FongoMongoDatabase.getCollection(FongoMongoDatabase.java:51)

It sounds like the driver 3.8 is different from the 3.7 one.

[leantrace]

Same here:
Caused by: java.lang.NoClassDefFoundError: com/mongodb/OperationExecutor
at com.github.fakemongo.Fongo.createMongo(Fongo.java:190)

Java: 11
Spring Boot: 2.1.0.RELEASE
Fongo: 2.2.0-RC2
mongodb-driver: 3.8.2

[bsautel]

You should give a try to mongo-java-server.

I tried it recently, I encountered two blocking issues (features not yet implemented), I reported them and they were fixed very quickly. All my tests are now running with Spring Boot 2.1.0. 😀

[leantrace]

Thx @bsautel - works like a charm! 👍

A short How-To for those, running into same Problem
Java Runtime: 11
Syntax: Kotlin (its easy to translate to Java with IntelliJ)
Spring Boot: 2.1.0.RELEASE
mongo-java-server: 1.9.7
mongodb-driver: 3.8.2

Replace "fongo" with "mongo-java-server" in your pom.xml, gradle whatever

<dependency>
	<groupId>de.bwaldvogel</groupId>
	<artifactId>mongo-java-server</artifactId>
	<version>1.9.7</version>
	<scope>test</scope>
</dependency>

Add Spring Boot Configuration

@EnableAutoConfiguration(exclude = [EmbeddedMongoAutoConfiguration::class, MongoAutoConfiguration::class, MongoDataAutoConfiguration::class, SecurityAutoConfiguration::class])
@EnableMongoRepositories(basePackages = ["my.project.repositories"])
@Configuration
@ComponentScan(basePackages = ["my.project"],
        excludeFilters = [ComponentScan.Filter(classes = [SpringBootApplication::class])])
class InMemoryMongoDbConfiguration : AbstractMongoConfiguration(){
    
    lateinit var client: MongoClient
    lateinit var server: MongoServer

    @Bean
    fun userCascadingMongoEventListener(): CascadeSaveMongoEventListener {
        return CascadeSaveMongoEventListener()
    }

    @Throws(Exception::class)
    override fun mongoClient(): MongoClient {
        server = MongoServer(MemoryBackend())
        // bind on a random local port
        val serverAddress = server.bind()
        client = MongoClient(ServerAddress(serverAddress))
        return client
    }

    override fun getDatabaseName(): String {
        return "test"
    }
    
    @PreDestroy
    fun shutdown(){
        client.close()
        server.shutdown()
    }

}

Make a Test

@RunWith(SpringRunner::class)
@SpringBootTest(
  classes = [InMemoryMongoDbConfiguration::class],
  webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
class ApplicationsTest {

	@Autowired
	lateinit var testRestTemplate: TestRestTemplate

    @Test
    fun whenCalled_thenShouldReturnApplications() {
        val _prj_base = Utils.createBasicProjectFull(UUID.randomUUID().toString())
        val p = testRestTemplate.withBasicAuth("admin", "admin").postForEntity("/api/v1/projects", _prj_base, Project::class.java).body
        val req = testRestTemplate.withBasicAuth("admin", "admin").getForEntity("/api/v1/projects/${p._id}", Project::class.java)
        assertNotNull(req)
        assertEquals(HttpStatus.OK, req?.statusCode)
        Utils.assertIgnoreIdAndCreatedOn(p, req.body!!, true)
        assertEquals(setOf<Application>(), req.body!!.applications.toSet())
    }
}

Keep smiling! :)

[bsautel]

Nice @leantrace , thanks for sharing the replacement example!

I just noticed noticed that you don't close the server in your InMemoryMongoDbConfiguration (server.shutdown() as explained in the project documentation) when the application context is destroyed. This may lead to resource leaks in your tests execution. It's not a big deal if the tests run in a dedicated JVM that stops at the ends of tests execution but it is better to free it anyway.

[bwaldvogel]

@leantrace @bsautel: I’m happy to hear that mongo-java-server works for you.

The Spring Boot configuration example could be something to include in the README.
Do you want to submit a pull request?

[ndemengel]

Hi,

Not sure if I should double-post it or not, but you might be interested in that other comment of mine for a solution to have fongo working with mongo 3.8 : #357 (comment)