///////////////////////////////////////////////////////////////
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
///////////////////////////////////////////////////////////////

[[two-minutes-intro,Polygene™ in 2 minutes]]
= Polygene™ in 2 minutes =

TIP: Theses tutorials are based on actual code found in the `tutorials/` directory of the
https://polygene.apache.org/download.html[Polygene™ SDK sources]. You should start your favorite editor and find the code related to
this tutorial, run it and play with it.

To show that Polygene™ is not necessarily complex, not hard to get going with and easy to deploy, we are first showing the
classic HelloWorld, as small as it can get and still be Composite Oriented Programming and not only standard OOP.

If you want to reproduce what's explained in this tutorial, remember to depend on the Core Runtime artifact that depends
on Core API, Core SPI, and Core Bootstrap:

include::../../../../../core/runtime/build/docs/buildinfo/artifact.txt[]

See the <<howto-depend-on-polygene>> tutorial for details.

Ready, Set, Go!

Let's say we want to do the common HelloWorld example, but with a more domain-oriented setting.
We have a Speaker interface that does the talking.
But we also need an implementation for Speaker, which we declare here via the `@Mixins( SpeakerMixin.class )`.


[snippet,java]
-----------
source=tutorials/introduction/twominutes/src/main/java/org/apache/polygene/demo/twominute/Speaker.java
tag=documentation
-----------

And of course, the simple implementation of the Speaker interface.
In this case, return a String with the content "Hello, World!".

[snippet,java]
-----------
source=tutorials/introduction/twominutes/src/main/java/org/apache/polygene/demo/twominute/SpeakerMixin.java
tag=documentation
-----------

So far so good. We now need to make this into something that can run. This can be done like this;

[snippet,java]
-----------
source=tutorials/introduction/twominutes/src/main/java/org/apache/polygene/demo/twominute/Main.java
tag=documentation
-----------

. The SingletonAssembler is a convenience class that creates a Polygene™ Runtime instance and an application with one layer
  and one module in it.

. We declare a TransientComposite of type `Speaker`.

. We create the Composite instance from the Module.

*Done!*

Next step, <<ten-minutes-intro>>.
