Overview (Infinispan DynamoDB cache store v4.1)

Packages
Package	Description
com.nimbusds.infinispan.persistence.dynamodb	DynamoDB store for Infinispan.
com.nimbusds.infinispan.persistence.dynamodb.config	Configuration classes.
com.nimbusds.infinispan.persistence.dynamodb.logging	Logging.
com.nimbusds.infinispan.persistence.dynamodb.query	DynamoDB query executor interfaces.

Cache loader / writer for an AWS DynamoDB database backend.

Requirements

Infinispan 9.4+
Java 8+
AWS DynamoDB database

Features

Implements the complete AdvancedLoadWriteStore SPI.
Provides an interface for transforming Infinispan entries to / from structured DynamoDB items.
Provides an optional interface for executing arbitrary queries against DynamoDB, bypassing the standard Infinispan load / store API.
Optional support for enabling strongly consistent reads.
Optional transparent application of a range key to facilitate multi-tenancy: sharing a table among multiple Infinispan caches of the same type, while keeping data access isolated. The DynamoDBItemTransformer.getRangeKeyAttributeName() method specifying a range key name overrides this configuration setting.
Optional transparent DynamoDB table name prefixing.
Optional setting of a time-to-live (TTL) attribute.
Optional server-side (data-at-rest) encryption when the DynamoDB table is created.
Optional securing of the integrity and authenticity of the stored DynamoDB items with HMAC SHA-256.
Optional continuous backups.
Optional HTTP proxy.
Optional creation of the DynamoDB table with an enabled stream of view type NEW_AND_OLD_IMAGES, required for setting up a global table with replicas in two or more AWS regions.
Dropwizard Metrics: Read, put, delete, process and purge operation timers.
System property interpolation for all configuration properties using a ${sys-prop-name:default-value} format.
Multi-level logging via Log4j2.
Open source (Apache 2.0 license).

Usage

Add the Maven dependency coordinates for the DynamoDB cache store to your project.
Implement DynamoDBItemTransformer to translate between Infinispan entries (key / value pairs with optional metadata) and DynamoDB items.
Configure a DynamoDB store for each Infinispan cache that requires one, by setting the attributes specified in DynamoDBStoreConfiguration. Also, see the example below. Note that the DynamoDB store can be safely shared between multiple replicated / distributed instances of a cache. It can also be used in read-only mode.
Make sure the AWS credentials for accessing the DynamoDB table(s) are configured in way that the default AWS credentials provider chain can look them up, e.g. by setting the aws.accessKeyId and aws.secretKey Java system properties.

Maven

Maven coordinates:

<dependency>
    <groupId>com.nimbusds</groupId>
    <artifactId>infinispan-cachestore-dynamodb</artifactId>
    <version>[ version ]</version>
</dependency>

where [ version ] should be the latest stable version.

Example configuration

<infinispan xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xsi:schemaLocation="urn:infinispan:config:9.4 http://www.infinispan.org/schemas/infinispan-config-9.4.xsd"
               xmlns="urn:infinispan:config:9.4"
               xmlns:dynamodb="urn:infinispan:config:store:dynamodb:1.8">

    <cache-container name="myCacheContainer" default-cache="users">
        <jmx duplicate-domains="true"/>
        <local-cache name="users">
            <eviction size="100"/>
            <persistence>
                <dynamodb:dynamodb-store
                    shared="true"
                    region="us-east-1"
                    item-transformer="com.nimbusds.infinispan.persistence.dynamodb.UserItemTransformer"
                    table-prefix="myapp_"
                />
            </persistence>
        </local-cache>
    </cache-container>

</infinispan>