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Embedded MongoDB

Embedded MongoDB will provide a platform neutral way for running mongodb in unittests.

Why?

• dropping databases causing some pains (often you have to wait long time after each test)
• its easy, much easier as installing right version by hand
• you can change version per test

Comments about Embedded MongoDB in the Wild

http://stackoverflow.com/questions/6437226/embedded-mongodb-when-running-integration-tests http://www.cubeia.com/index.php/blog/archives/436

Howto

Maven

Stable (Maven Central Repository, Released: 13.06.2012 - wait 24hrs for maven central)

<dependency>
	<groupId>de.flapdoodle.embedmongo</groupId>
	<artifactId>de.flapdoodle.embedmongo</artifactId>
	<version>1.16</version>
</dependency>

Snapshots (Repository http://oss.sonatype.org/content/repositories/snapshots)

<dependency>
	<groupId>de.flapdoodle.embedmongo</groupId>
	<artifactId>de.flapdoodle.embedmongo</artifactId>
	<version>1.17-SNAPSHOT</version>
</dependency>

Changelog

• Much better windows support in 1.15.
• Please DON'T use 1.13 (had some troubles).

1.17 (SNAPSHOT)

• added version 2.0.6 and 2.1.2

1.16

• added version 2.0.5 (main version 2.0 now points to it)
• changed http user agent
• customizeable mongod process output
• better loopback device detection for mongod process shutdown via command

1.15

• now we send ctrl+c on linux and osx, then send shutdown to server, then taskkill on windows (may the force be with us)
• disable journal for faster turnaround times
• noauth added
• customize artifact storage path
• detection if localhost is not loopback (command shutdown on mongod does not work for remote access)
• formated process output

1.14

• changed back to send ctrl+c and then send shutdown

1.13

• mongod process management improvement (windows mongod shutdown improvement (alpha) (some trouble stopping process on windows - http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4770092))
• send shutdown to server
• send ctrl+c to mongod will perform clean shutdown (untested on windows using taskkill)
• now with 2.1.1

1.12

• NUMA support (alpha) - http://www.mongodb.org/display/DOCS/NUMA

1.11

• timeout fix on slow systems
• stability on win plattforms (hopefully)

1.10

• race condition and cleanup of mongod process

1.9

• fixed 64Bit detection - amd64
• now with main versions 1.6, 1.8, 2.0, 2.1

Supported Versions

Versions: some older, 1.8.5, 1.9.0, 2.0.4, 2.1.0 Support for Linux, Windows and MacOSX.

Usage

int port = 12345;
MongodProcess mongod = null;
MongoDBRuntime runtime = MongoDBRuntime.getDefaultInstance();

try {
	mongod = runtime.start(new MongodConfig(Version.V2_0, port,Network.localhostIsIPv6()));

	Mongo mongo = new Mongo("localhost", port);
	DB db = mongo.getDB("test");
	DBCollection col = db.createCollection("testCol", new BasicDBObject());
	col.save(new BasicDBObject("testDoc", new Date()));

} finally {
	if (mongod != null)	mongod.stop();
}

Usage - custom mongod filename

int port = 12345;
MongodProcess mongod = null;
RuntimeConfig runtimeConfig=new RuntimeConfig();
runtimeConfig.setExecutableNaming(new UserTempNaming());
MongoDBRuntime runtime = MongoDBRuntime.getInstance(runtimeConfig);

try {
	mongod = runtime.start(new MongodConfig(Version.V2_0, port,Network.localhostIsIPv6()));

	Mongo mongo = new Mongo("localhost", port);
	DB db = mongo.getDB("test");
	DBCollection col = db.createCollection("testCol", new BasicDBObject());
	col.save(new BasicDBObject("testDoc", new Date()));

} finally {
	if (mongod != null)	mongod.stop();
}

Unit Tests

public abstract class AbstractMongoOMTest extends TestCase {

	private MongodExecutable _mongodExe;
	private MongodProcess _mongod;

	private Mongo _mongo;
	private static final String DATABASENAME = "mongo_test";

	@Override
	protected void setUp() throws Exception {

		MongoDBRuntime runtime = MongoDBRuntime.getDefaultInstance();
		_mongodExe = runtime.prepare(new MongodConfig(Version.V2_0, 12345));
		_mongod=_mongodExe.start();
		
		super.setUp();

		_mongo = new Mongo("localhost", 12345);
	}

	@Override
	protected void tearDown() throws Exception {
		super.tearDown();
		
		_mongod.stop();
		_mongodExe.cleanup();
	}

	public Mongo getMongo() {
		return _mongo;
	}

	public String getDatabaseName() {
		return DATABASENAME;
	}
}

Customize Artifact Storage

...
IArtifactStoragePathNaming pathNaming = ...

RuntimeConfig runtimeConfig=new RuntimeConfig();
runtimeConfig.setExecutableNaming(new UserTempNaming());
runtimeConfig.setArtifactStorePathNaming(pathNaming);
MongoDBRuntime runtime = MongoDBRuntime.getInstance(runtimeConfig);
...

Usage - custom mongod process output

...
RuntimeConfig runtimeConfig=new RuntimeConfig();
runtimeConfig.setMongodOutputConfig(new MongodProcessOutputConfig(Processors.namedConsole("[mongod>]"),
	Processors.namedConsole("[MONGOD>]"), Processors.namedConsole("[console>]")));
MongoDBRuntime runtime = MongoDBRuntime.getInstance(runtimeConfig);
...

Other MongoDB Stuff

• https://github.com/thiloplanz/jmockmongo - mongodb mocking
• https://github.com/lordofthejars/nosql-unit - extended nosql unit testing