Overview

A JClouds BlobStore provider backed by MongoDB's GridFS. Not all capabilities are supported, but there should be enough for common use cases.

Usage

First, add a dependency to your build file. Releases are published to Bintray JCenter. See the changelog for the latest version.

Gradle:

repositories {
    jcenter()
}
dependencies {
    compile "com.commercehub.jclouds:jclouds-gridfs-blobstore:1.0.0"
}

Maven:

<dependency>
    <groupId>com.commercehub.jclouds</groupId>
    <artifactId>jclouds-gridfs-blobstore</artifactId>
    <version>1.0.1</version>
</dependency>

Next, obtain an instance of the BlobStore using a standard MongoDB connection string:

Properties overrides = new Properties();
overrides.setProperty(Constants.PROPERTY_ENDPOINT, "mongodb://my_mongo_server:27017/?maxPoolSize=50");
BlobStoreContext context = ContextBuilder.newBuilder("gridfs").overrides(overrides)
    .buildView(BlobStoreContext.class);
BlobStore blobStore = context.getBlobStore();

You can also use a non-standard connection string (deprecated):

overrides.setProperty(Constants.PROPERTY_ENDPOINT, "gridfs://my_mongo_server:27017");

To use a replica set when using a non-standard connection string, specify additional members as a comma or semicolon-separated list, like this:

overrides.setProperty(Constants.PROPERTY_ENDPOINT, "gridfs://node1:27017;node2:27017;node3:27017");

Then, use the blob store to put/get blobs. The container is in the format DB[/BUCKET], where DB is the name of the database and BUCKET is the optional name of the GridFS bucket (which defaults to fs).

blobStore.createContainerInLocation(null, "blobStore");
Blob blobToPut = blobStore.blobBuilder("myBlob").payload("myPayload").build();
blobStore.putBlob("blobStore", blob);
Blob blobFromGet = blobStore.getBlob("blobStore", "myBlob");

Finally, close the context to allow it to properly clean up.

context.close();

Development

Releasing

Releases are uploaded to Bintray via the gradle-release plugin and gradle-bintray-plugin. To upload a new release, you need to be a member of the commercehub-oss Bintray organization. You need to specify your Bintray username and API key when uploading. Your API key can be found on your Bintray user profile page. You can put your username and API key in ~/.gradle/gradle.properties like so:

bintrayUserName = johndoe
bintrayApiKey = 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef

Then, to upload the release:

./gradlew release

Alternatively, you can specify your Bintray username and API key on the command line:

./gradlew -PbintrayUserName=johndoe -PbintrayApiKey=0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef release

The release task will prompt you to enter the version to be released, and will create and push a release tag for the specified version. It will also upload the release artifacts to Bintray.

After the release artifacts have been uploaded to Bintray, they must be published to become visible to users. See Bintray's Publishing documentation for instructions.

After publishing the release on Bintray, it's also nice to create a GitHub release. To do so:

• Visit the project's releases page
• Click the "Draft a new release" button
• Select the tag that was created by the Gradle release task
• Enter a title; typically, this should match the tag (e.g. "1.2.0")
• Enter a description of what changed since the previous release (see the changelog)
• Click the "Publish release" button