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vlingo-symbio

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The vlingo/PLATFORM reactive, scalable, and resilient Object, CQRS, and Event Sourcing storage tools for services and applications.

Name

The name "symbio" highlights the symbiotic relationship between domain models and persistence mechanisms. Domain models must be persisted and individual parts must be reconstituted to memory when needed. Persistence mechanisms crave data to store. Hence we can conclude that the two need and benefit from the other.

Interestingly too is that the name "symbio" ends with the letters, i and o, for input and output. The StateStorage, introduced next, produces domain model output to disk, and input from disk back to the domain model.

Journal Storage

The Journal and related protocols support simple-to-use Event Sourcing, including JournalReader for streaming across all entries in the journal, and StreamReader for reaching individual "sub-streams" belonging to entities/aggregates in your application. There is a growing number of implementations:

  • JDBC over Postgres: PostgresJournalActor and supporting asynchronous readers
  • FoundationDB support: FoundationDBJournalActor and supporting asynchronous readers

Object Storage

The ObjectStore is a simple object-relational mapped storage mechanism that can be run against a number of persistence engines. These are the available implementations:

  • Jdbi over JDBC: JdbiObjectStoreDelegate controlled under JDBCObjectStoreActor
  • JPA standard: JPAObjectStoreDelegate for JPA implementations, including EclipseLink, OpenJPA, and Hibernate

State Storage

The StateStore is a simple CQRS Key-CLOB/BLOB storage mechanism that can be run against a number of persistence engines. Use it for both Command/Write Models and Query/Read Models. These are the available storage implementations:

  • In-memory binary: InMemoryBinaryStateStoreActor
  • In-memory text: InMemoryTextStateStoreActor
  • DynamoDB Text Store: DynamoDBTextStateActor
  • DynamoDB Binary Store: DynamoDBBinaryStateActor
  • General-purpose JDBC: JDBCTextStateStoreActor
  • Apache Geode: GeodeStateStoreActor

The JDBCTextStateStoreActor has these database delegate implementations:

  • HSQLDB: HSQLDBStorageDelegate
  • PostgresSQL: PostgresStorageDelegate

Adding additional JDBC storage delegates is a straightforward process requiring a few hours of work.

We welcome you to add support for your favorite database!

Bintray

  <repositories>
    <repository>
      <id>jcenter</id>
      <url>https://jcenter.bintray.com/</url>
    </repository>
  </repositories>
  <dependencies>
    <dependency>
      <groupId>io.vlingo</groupId>
      <artifactId>vlingo-symbio</artifactId>
      <version>0.8.9</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>
dependencies {
    compile 'io.vlingo:vlingo-symbio:0.8.9'
}

repositories {
    jcenter()
}

License (See LICENSE file for full license)

Copyright © 2012-2018 Vaughn Vernon. All rights reserved.

This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.