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 * 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
 *
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 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
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[[tools-shell,Command Line Shell]]
= Polygene Generator =
Apache Polygene comes with a http://yeoman.io/[Yeoman] code generator, to
quickly set up a project for Polygene applications.

== Usage ==

You will need `node` installed in your machine. In case you don't have it
(you can check this typing `node --version` in your terminal) please visit
this https://nodejs.org/en/download/[link].

Then run the following command to install Yeoman and the Polygene generator:

[source,shell]
----
$ npm install -g yo generator-polygene
----

Then run the following commands to get started:

[source,shell]
----
$ mkdir projectdirname
$ cd projectdirname
$ yo polygene
----

It will ask a lot of questions. For choice questions, you operate up and down, and with multi-choice, you
select with space bar.

== First Trial ==

=== Project Name ===
It starts with the Project name. This will be the project name in Gradle and any gradle driven naming of the
project such as in IDEs. It defaults to current directory with initial uppercase letter.

[source,shell]
----
? Your project name
----

=== Java Package Name ===
This is the root of the package names in the multi-module, multi-package project.

[source,shell]
----
? Java package name
----

=== Application Type ===

The Application Type that you want to create.

NOTE: Command Line is currently not implemented correctly, and the Rest API is still not complete.

[source,shell]
----
? what type of application do you want to create?
  Command Line
❯ Rest API
----

=== Entity Store ===
Polygene has built-in persistence, and that is backed by entity store plugins. There are currently a fair
number of implementations to choose from. Not that "memory" is not persistent, but looses the content on shutdown.

[source,shell]
----
? Which entity store do you want to use?
  Cassandra
  File
  DerbySQL
  Geode
  H2SQL
  Hazelcast
  JClouds
  Jdbm
  LevelDB
> Memory
  MongoDB
  MySQL
  Preferences
  Redis
  Riak
  PostgreSQL
  SQLite
----

If one of the SQL options are given, then a question of connection pool will pop up.

[source,shell]
----
? Which connection pool do you want to use?
  BoneCP
> DBCP
----

=== Indexing/Query system ===
Select of a pluggable Indexing and Query subsystem.

In Polygene, the indexing/query system is separated from store and retrieve. This allows us to optimize direct
fetches for navigating object graphs. In practical Polygene applications, we find that querying is not nearly as
common as in, say, JPA applications. The query layout in the underlying indexing system is also very different
from the document-oriented approach of most entity stores.

NOTE: Not all indexing subsystems support all of the specified Indexing/Query SPI.

[source,shell]
----
? Which indexing system do you want to use?
> Rdf
  ElasticSearch
  Solr
  SQL
----

=== Caching System ===
Some of the entity stores rely on a Polygene level caching SPI. This caching subsystem is pluggable and
will be used by any of the entity stores that uses the internal MapEntityStore SPI

[source,shell]
----
? Which caching system do you want to use?
> None
  Memcache
  EhCache
----

=== Serialization system ===
Serialization is a key concept in business applications, and in Polygene that is a pluggable subsystem.

? Which serialization system do you want to use?

[source,shell]
----
> JavaxJson
  JavaxXml
  MessagePack
----

=== Metrics System ===
Metrics is the SPI for measuring the performance and health of an Polygene application. Currently only
one implementation is available.

? Which metrics capturing system do you want to use?

[source,shell]
----
> None
  Codahale
----

=== Other Features ===

JMX feature installs the MBean server and registers all Services with it, in the application structure defined.

Mixin Scripting is allowing Mixin methods to be implemented in other languages parallel to Java.

Security installs Apache Shiro and binds Users, Groups and Roles to entity store.

[source,shell]
----
? Other features?
 ◯ jmx
 ◯ mixin scripting
 ◯ security
----


=== Example ===

[source,shell]
----
~/dev/sensetif/sink$ yo polygene
? Your project name Sink
? Java package name com.sensetif.sink
? what type of application do you want to create? Rest API
? Which entity store do you want to use? Cassandra
? Which indexing system do you want to use? Rdf
? Which caching system do you want to use? None
? Which serialization system do you want to use? JavaxJson
? Which metrics capturing system do you want to use? Codahale
? Other features? jmx, security
app name Sink
Entity Stores: Cassandra
Indexing: Rdf
Caching: None
Serialization: JavaxJson
Features: [ 'jmx', 'security' ]
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/config/ConfigurationLayer.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/InfrastructureLayer.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/domain/DomainLayer.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/connectivity/ConnectivityLayer.java
   create app/src/main/webapp/WEB-INF/web.xml
   create app/build.gradle
   create bootstrap/build.gradle
   create model/build.gradle
   create rest/build.gradle
   create build.gradle
   create settings.gradle
   create gradlew
   create gradlew.bat
   create gradle/wrapper/gradle-wrapper.jar
   create gradle/wrapper/gradle-wrapper.properties
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/config/ConfigModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/FileConfigurationModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/RdfIndexingModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/CodahaleMetricsModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/JavaxJsonSerializationModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/CassandraStorageModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/domain/CrudModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/domain/JmxModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/domain/SecurityModule.java
   create model/src/main/java/com/sensetif/sink/model/security/CryptoConfiguration.java
   create model/src/main/java/com/sensetif/sink/model/security/CryptoException.java
   create model/src/main/java/com/sensetif/sink/model/security/CryptoService.java
   create model/src/main/java/com/sensetif/sink/model/security/EncryptedStringPropertyConcern.java
   create model/src/main/java/com/sensetif/sink/model/security/Group.java
   create model/src/main/java/com/sensetif/sink/model/security/RealmService.java
   create model/src/main/java/com/sensetif/sink/model/security/SecurityRepository.java
   create model/src/main/java/com/sensetif/sink/model/security/User.java
   create model/src/main/java/com/sensetif/sink/model/security/UserFactory.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/connectivity/RestApiModule.java
   create rest/src/main/java/com/sensetif/sink/rest/security/DefaultEnroler.java
   create rest/src/main/java/com/sensetif/sink/rest/security/DefaultVerifier.java
----

== Command Line Options ==

[source,shell]
----
--import=<modelfile>   Imports the model from a JSON file and creates a project descibed therein.
--export=<modelfile>   Exports the generated model to a JSON file in the same format as the import model.
--noPrompt             If this option is not provided for --import-model, the user can still
                       input answers, which will override the values in the imported model
----

=== Example ===

If we run the following,

[source,shell]
----
$ yo polygene --import=../model.json --noPrompt
----

where the content of the +../model.json+ is as follows,

[source]
----
{
  "name": "Sink",
  "packageName": "com.sensetif.sink",
  "applicationtype": "Rest API",
  "features": [
    "security"
  ],
  "entitystore": "MongoDB",
  "indexing": "SQL",
  "caching": "Memcache",
  "serialization": "JavaxJson",
  "metrics": "Codahale",
  "modules": {
    "user": {
      "cruds": [
        { "name": "Users" },
        {"name": "Roles"},
        {"name": "User"},
        {"name": "Role"},
        {"name": "Permission"},
        {"name": "Group"},
        {"name": "Groups"}
      ],
      "services": [
        {
          "name": "AuthService",
          "visibility": "application",
          "configuration" : [
            { "name": "backend", "type": "java.lang.String" },
            { "name": "connectString", "type": "java.lang.String",
              "description": [
                  "The connection string to the authentication and authorization backend system."
              ]
            }
          ]
        }
      ]
    },
    "organization": {
      "cruds": [
        {"name": "Organizations"},
        {
          "name": "Organization",
          "properties": [
            { "name": "name", "type": "java.lang.String" },
            { "name": "created", "type": "java.time.Instant" }
          ]
        },
        { "name": "Project" }
      ],
      "entities": [
        { "name": "Invoice" }
      ],
      "values": [
        {
          "name": "CreditLimit",
          "properties" : [
            { "name" : "amount", "type" : "java.math.BigDecimal" },
            { "name" : "currency", "type" : "java.lang.String" }
          ]
        }
      ],
      "transients": [
        { "name": "OrderConfirmation" }
      ],
      "objects": [
        { "name": "PaypalNotification" }
      ]
    },
    "sensor": {
      "cruds": [
        { "name": "SensorData" }
      ],
      "entities": [
        { "name": "Sensor" },
        { "name": "PollSchedule" }
      ]
    }
  }
}
----------------

we will create a complete project, like this

[source,shell]
----
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/config/ConfigurationLayer.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/InfrastructureLayer.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/domain/DomainLayer.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/connectivity/ConnectivityLayer.java
   create rest/src/main/java/com/sensetif/sink/rest/FloodRestApplication.java
   create app/src/main/java/com/sensetif/sink/app/FloodLauncher.java
   create app/src/main/config/development/web-shiro.ini
   create app/src/main/config/qa/web-shiro.ini
   create app/src/main/config/staging/web-shiro.ini
   create app/src/main/config/production/web-shiro.ini
   create app/src/test/java/com/sensetif/sink/app/BootstrapTest.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/FloodApplicationAssembler.java
   create app/build.gradle
   create bootstrap/build.gradle
   create model/build.gradle
   create rest/build.gradle
   create build.gradle
   create settings.gradle
   create gradlew
   create gradlew.bat
   create gradle/wrapper/gradle-wrapper.jar
   create gradle/wrapper/gradle-wrapper.properties
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/config/ConfigModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/MemcacheCachingModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/FileConfigurationModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/RdfIndexingModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/CodahaleMetricsModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/JavaxJsonSerializationModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/infrastructure/CassandraStorageModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/domain/CrudModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/domain/UserModule.java
   create model/src/main/java/com/sensetif/sink/model/user/User.java
   create model/src/main/java/com/sensetif/sink/model/user/Users.java
   create model/src/main/java/com/sensetif/sink/model/user/Role.java
   create model/src/main/java/com/sensetif/sink/model/user/Roles.java
   create model/src/main/java/com/sensetif/sink/model/user/Permission.java
   create model/src/main/java/com/sensetif/sink/model/user/Permissions.java
   create model/src/main/java/com/sensetif/sink/model/user/Group.java
   create model/src/main/java/com/sensetif/sink/model/user/Groups.java
   create model/src/main/java/com/sensetif/sink/model/user/AuthService.java
   create model/src/main/java/com/sensetif/sink/model/user/AuthBackend.java
   create model/src/main/java/com/sensetif/sink/model/user/AuthConfiguration.java
   create app/src/main/config/development/AuthService.properties
   create app/src/main/config/qa/AuthService.properties
   create app/src/main/config/staging/AuthService.properties
   create app/src/main/config/production/AuthService.properties
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/domain/OrganizationModule.java
   create model/src/main/java/com/sensetif/sink/model/organization/Organization.java
   create model/src/main/java/com/sensetif/sink/model/organization/Project.java
   create model/src/main/java/com/sensetif/sink/model/organization/Contract.java
   create model/src/main/java/com/sensetif/sink/model/organization/ContractPart.java
   create model/src/main/java/com/sensetif/sink/model/organization/Order.java
   create model/src/main/java/com/sensetif/sink/model/organization/OrderConfirmation.java
   create model/src/main/java/com/sensetif/sink/model/organization/Invoice.java
   create model/src/main/java/com/sensetif/sink/model/organization/CreditLimit.java
   create model/src/main/java/com/sensetif/sink/model/organization/Label.java
   create model/src/main/java/com/sensetif/sink/model/organization/PaypalNotification.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/domain/SensorModule.java
   create model/src/main/java/com/sensetif/sink/model/sensor/SensorDetails.java
   create model/src/main/java/com/sensetif/sink/model/sensor/SensorPoll.java
   create model/src/main/java/com/sensetif/sink/model/sensor/Access.java
   create model/src/main/java/com/sensetif/sink/model/sensor/JsonDocumentAddress.java
   create model/src/main/java/com/sensetif/sink/model/sensor/XmlDocumentAddress.java
   create model/src/main/java/com/sensetif/sink/model/sensor/ModbusDeviceAddress.java
   create model/src/main/java/com/sensetif/sink/model/sensor/JsonPathSelector.java
   create model/src/main/java/com/sensetif/sink/model/sensor/XPathSelector.java
   create model/src/main/java/com/sensetif/sink/model/sensor/ModbusSelector.java
   create model/src/main/java/com/sensetif/sink/model/sensor/PollSchedule.java
   create model/src/main/java/com/sensetif/sink/model/sensor/AccessType.java
   create model/src/main/java/com/sensetif/sink/model/sensor/Address.java
   create model/src/main/java/com/sensetif/sink/model/sensor/Selector.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/domain/JmxModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/domain/SecurityModule.java
   create model/src/main/java/com/sensetif/sink/model/security/CryptoConfiguration.java
   create model/src/main/java/com/sensetif/sink/model/security/CryptoException.java
   create model/src/main/java/com/sensetif/sink/model/security/CryptoService.java
   create model/src/main/java/com/sensetif/sink/model/security/EncryptedStringPropertyConcern.java
   create model/src/main/java/com/sensetif/sink/model/security/Group.java
   create model/src/main/java/com/sensetif/sink/model/security/RealmService.java
   create model/src/main/java/com/sensetif/sink/model/security/SecurityRepository.java
   create model/src/main/java/com/sensetif/sink/model/security/User.java
   create model/src/main/java/com/sensetif/sink/model/security/UserFactory.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/connectivity/HttpServerModule.java
   create bootstrap/src/main/java/com/sensetif/sink/bootstrap/connectivity/RestApiModule.java
   create rest/src/main/java/com/sensetif/sink/rest/security/DefaultEnroler.java
   create rest/src/main/java/com/sensetif/sink/rest/security/DefaultVerifier.java
   create app/src/main/config/development/es-cassandra.properties
   create app/src/main/config/qa/es-cassandra.properties
   create app/src/main/config/staging/es-cassandra.properties
   create app/src/main/config/production/es-cassandra.properties
----

Notice that there is a ++app/src/main/config++ directory with 4 sub-directories. Each of those subdirectories
represents one of the modes in ++Application.Mode++. The start script will look for the environment variable
SYS_ENVIRONMENT and select the ++Application.Mode++ accordingly and set the configuration directory
(i.e. make it part of the CLASSPATH) to such.