=doc clean up what-is-akka.rst and switch to www.typesafe.com
the latter is necessary because of broken DNS requirements which make apex domains brittle (since they must resolve to an A record with a single IP)
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Roland Kuhn
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@ -10,7 +10,7 @@ later installed on you machine.
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Getting Started Guides and Template Projects
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--------------------------------------------
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The best way to start learning Akka is to download `Typesafe Activator <http://typesafe.com/platform/getstarted>`_
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The best way to start learning Akka is to download `Typesafe Activator <http://www.typesafe.com/platform/getstarted>`_
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and try out one of Akka Template Projects.
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Download
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@ -69,7 +69,7 @@ How to see the JARs dependencies of each Akka module is described in the
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Using a release distribution
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----------------------------
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Download the release you need from http://typesafe.com/stack/downloads/akka and unzip it.
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Download the release you need from http://akka.io/downloads and unzip it.
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Using a snapshot version
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------------------------
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@ -117,8 +117,8 @@ Using Akka with Maven
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---------------------
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The simplest way to get started with Akka and Maven is to check out the
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`Typesafe Activator <http://typesafe.com/platform/getstarted>`_
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tutorial named `Akka Main in Java <http://typesafe.com/activator/template/akka-sample-main-java>`_.
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`Typesafe Activator <http://www.typesafe.com/platform/getstarted>`_
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tutorial named `Akka Main in Java <http://www.typesafe.com/activator/template/akka-sample-main-java>`_.
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Since Akka is published to Maven Central (for versions since 2.1-M2), is it
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enough to add the Akka dependencies to the POM. For example, here is the
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@ -139,7 +139,7 @@ Using Akka with SBT
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-------------------
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The simplest way to get started with Akka and SBT is to check out the
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`Akka/SBT template <http://typesafe.com/resources/getting-started/typesafe-stack/downloading-installing.html#template-projects-for-scala-akka-and-play>`_
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`Akka/SBT template <http://www.typesafe.com/resources/getting-started/typesafe-stack/downloading-installing.html#template-projects-for-scala-akka-and-play>`_
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project.
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Summary of the essential parts for using Akka with SBT:
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@ -237,7 +237,7 @@ Need help?
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If you have questions you can get help on the `Akka Mailing List <http://groups.google.com/group/akka-user>`_.
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You can also ask for `commercial support <http://typesafe.com>`_.
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You can also ask for `commercial support <http://www.typesafe.com>`_.
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Thanks for being a part of the Akka community.
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@ -8,20 +8,22 @@
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We believe that writing correct concurrent, fault-tolerant and scalable
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applications is too hard. Most of the time it's because we are using the wrong
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tools and the wrong level of abstraction. Akka is here to change that. Using the
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Actor Model we raise the abstraction level and provide a better platform to build
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correct, concurrent, and scalable applications. For fault-tolerance we adopt the
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"Let it crash" model which the telecom industry has used with great success to
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build applications that self-heal and systems that never stop. Actors also provide
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the abstraction for transparent distribution and the basis for truly scalable and
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fault-tolerant applications.
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tools and the wrong level of abstraction. Akka is here to change that. Using
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the Actor Model we raise the abstraction level and provide a better platform to
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build scalable, resilient and responsive applications—see the `Reactive
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Manifesto <http://reactivemanifesto.org/>`_ for more details. For
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fault-tolerance we adopt the "let it crash" model which the telecom industry
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has used with great success to build applications that self-heal and systems
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that never stop. Actors also provide the abstraction for transparent
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distribution and the basis for truly scalable and fault-tolerant applications.
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Akka is Open Source and available under the Apache 2 License.
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Download from http://typesafe.com/stack/downloads/akka/
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Download from http://akka.io/downloads.
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Please note that all code samples compile, so if you want direct access to the sources, have a look
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over at the `Akka Docs Project <@github@/akka-docs/rst>`_.
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over at the Akka Docs subproject on github: for `Java <@github@/akka-docs/rst/java/code/docs>`_
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and `Scala <@github@/akka-docs/rst/scala/code/docs>`_.
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Akka implements a unique hybrid
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@ -32,27 +34,28 @@ Actors
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Actors give you:
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- Simple and high-level abstractions for concurrency and parallelism.
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- Asynchronous, non-blocking and highly performant event-driven programming model.
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- Very lightweight event-driven processes (approximately 2.7 million actors per GB RAM).
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- Simple and high-level abstractions for concurrency and parallelism.
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- Asynchronous, non-blocking and highly performant event-driven programming model.
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- Very lightweight event-driven processes (several million actors per GB of heap memory).
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See :ref:`Actors (Scala) <actors-scala>` and :ref:`Untyped Actors (Java) <untyped-actors-java>`
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See the chapter for :ref:`Scala <actors-scala>` or :ref:`Java <untyped-actors-java>`.
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Fault Tolerance
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---------------
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- Supervisor hierarchies with "let-it-crash" semantics.
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- Supervisor hierarchies can span over multiple JVMs to provide truly fault-tolerant systems.
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- Excellent for writing highly fault-tolerant systems that self-heal and never stop.
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- Supervisor hierarchies with "let-it-crash" semantics.
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- Supervisor hierarchies can span over multiple JVMs to provide truly fault-tolerant systems.
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- Excellent for writing highly fault-tolerant systems that self-heal and never stop.
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See :ref:`Fault Tolerance (Scala) <fault-tolerance-scala>` and :ref:`Fault Tolerance (Java) <fault-tolerance-java>`
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See :ref:`Fault Tolerance (Scala) <fault-tolerance-scala>` and :ref:`Fault Tolerance (Java) <fault-tolerance-java>`.
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Location Transparency
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---------------------
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Everything in Akka is designed to work in a distributed environment: all
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interactions of actors use pure message passing and everything is asynchronous.
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For an overview of the remoting see :ref:`remoting`
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For an overview of the cluster support see the :ref:`Java <cluster_usage_java>`
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and :ref:`Scala <cluster_usage_scala>` documentation chapters.
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Persistence
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-----------
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@ -61,6 +64,8 @@ Messages received by an actor can optionally be persisted and replayed when the
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restarted. This allows actors to recover their state, even after JVM crashes or when being migrated
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to another node.
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You can find more details in the respective chapter for :ref:`Java <persistence-java>` or :ref:`Scala <persistence-scala>`.
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Scala and Java APIs
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===================
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@ -77,45 +82,10 @@ Akka can be used in two different ways
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See the :ref:`deployment-scenarios` for details.
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What happened to Cloudy Akka?
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=============================
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Commercial Support
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==================
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The commercial offering was earlier referred to as Cloudy Akka. This offering
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consisted of two things:
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Akka is available from Typesafe Inc. under a commercial license which includes
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development or production support, read more `here
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<http://www.typesafe.com/how/subscription>`_.
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- Cluster support for Akka
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- Monitoring & Management (formerly called Atmos)
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Cloudy Akka has been discontinued and the Cluster support is now being moved into the
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Open Source version of Akka (the upcoming Akka 2.1), while Monitoring & Management
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(Atmos) has been re-branded as the Typesafe Console, which is now part of the commercial
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subscription for the Typesafe Stack (see below for details).
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Typesafe Stack
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==============
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Akka is now also part of the `Typesafe Stack <http://typesafe.com/stack>`_.
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The Typesafe Stack is a modern software platform that makes it easy for developers
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to build scalable software applications. It combines the Scala programming language,
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Akka, the Play! web framework and robust developer tools in a simple package that
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integrates seamlessly with existing Java infrastructure.
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The Typesafe Stack is all fully open source.
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Typesafe Console
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================
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On top of the Typesafe Stack we also have a commercial product called Typesafe
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Console which provides the following features:
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#. Slick Web UI with real-time view into the system
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#. Management through Dashboard, JMX and REST
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#. Dapper-style tracing of messages across components and remote nodes
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#. Real-time statistics
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#. Very low overhead monitoring agents (should always be on in production)
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#. Consolidation of statistics and logging information to a single node
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#. Storage of statistics data for later processing
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#. Provisioning and rolling upgrades
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Read more `here <http://typesafe.com/products/typesafe-subscription>`_.
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