enkan

Enkan(円環) is a microframework implementing a middleware pattern like ring or connect.

Concept

Minimal (Simple made easy)
Ease of development
Ease of operation

Minimal

Middleware pattern
No configuration files
Avoid blackbox
Less annotations
Less library dependencies
Single instance (Middlewares and compoments, controller)

Ease of development

Faster startup (Preventing to scan classes)
Reloading classes without restarting JVM
Trace execution of middlewares
Alert misconfiguration

Ease of operation

Starting server is fast. (~3 seconds)
Resetting application is very fast. (~1 seconds)
Run-time change predicates of middleware on the REPL

Requirements

Java8 or higher
Java EE 7 Specification

Middleware

Middleware is an implementation of filters and chains.

Service Unavailable
Session
Flash
Cookie
Parsing parameters
Trace log
Populating form (kotowari)
JSR-303 Validation (kotowari)
Routing like Rails (kotowari)
Injecting components to a controller (kotowari)

Components

In Enkan, component is an object manages lifecycle of stateful objects.

HikariCP
Flyway
Freemarker
Thyemeleaf
Jetty
Undertow
Doma2
JPA(EclipseLink)
Jackson
S2Util-beans
Metrics

Using enkan and kotowari, the following will be your code

public class ExampleController {
    @Inject
    private TemplateEngineComponent templateEngine;

    @Inject
    private DomaDaoProvider daoProvider;

    public HttpResponse index(ExampleForm form) {
        CustomerDao customerDao = daoProvider.get(CustomerDao.class);
        Customer customer = customerDao.selectById(form.getId());
        return templateEngine.render("example",
                "customer", customer);
    }
}

Get started

Add sonatype snapshots repository to your pom.xml

  <repositories>
    <repository>
      <id>sonatype-snapshot</id>
      <url>http://oss.sonatype.org/content/repositories/snapshots</url>
      <releases>
        <enabled>false</enabled>
      </releases>
      <snapshots>
        <enabled>true</enabled>
      </snapshots>
    </repository>
  </repositories>

Manual

EnkanSystem

The Enkan system consist of components. A component is a singleton instance that shares data between requests.

EnkanSystem.of(
    "doma", new DomaProvider(),
    "flyway", new FlywayMigration(),
    "template", new FreemarkerComponent(),
    "datasource", new HikariCPComponent(OptionMap.of("uri", "jdbc:h2:mem:test")),
    "app", new ApplicationComponent("kotowari.example.MyApplicationFactory"),
    "http", builder(new JettyComponent())
        .set(JettyComponent::setPort, Env.getInt("PORT", 3000))
        .build()
).relationships(
    component("http").using("app"),
    component("app").using("template", "doma", "datasource"),
    component("doma").using("datasource"),
    component("flyway").using("datasource")
);

Application

An application has a stack of middlewares. A middleware is a single instance. By use method, the middleware is used by application.

app.use(ANY("/secret"), new AuthenticateMiddleware());

REPL

Enkan system is operated by a REPL interface.

Start a server

REPL> /start
[pool-1-thread-1] INFO com.zaxxer.hikari.HikariDataSource - HikariPool-0 - is starting.
[pool-1-thread-1] INFO org.flywaydb.core.internal.util.VersionPrinter - Flyway 3.2.1 by Boxfuse
[pool-1-thread-1] INFO org.flywaydb.core.internal.dbsupport.DbSupportFactory - Database: jdbc:h2:mem:test (H2 1.4)
[pool-1-thread-1] INFO org.flywaydb.core.internal.command.DbValidate - Validated 1 migration (execution time 00:00.019s)
[pool-1-thread-1] INFO org.flywaydb.core.internal.metadatatable.MetaDataTableImpl - Creating Metadata table: "PUBLIC"."schema_version"
[pool-1-thread-1] INFO org.flywaydb.core.internal.command.DbMigrate - Current version of schema "PUBLIC": << Empty Schema >>
[pool-1-thread-1] INFO org.flywaydb.core.internal.command.DbMigrate - Migrating schema "PUBLIC" to version 1 - CreateCustomer
[pool-1-thread-1] INFO org.flywaydb.core.internal.command.DbMigrate - Successfully applied 1 migration to schema "PUBLIC" (execution time 00:00.059s).
2 02, 2016 7:58:35 午後 org.hibernate.validator.internal.util.Version <clinit>
INFO: HV000001: Hibernate Validator 5.2.2.Final
[pool-1-thread-1] INFO org.eclipse.jetty.util.log - Logging initialized @2688228ms
[pool-1-thread-1] INFO org.eclipse.jetty.server.Server - jetty-9.3.5.v20151012
REPL> [pool-1-thread-1] INFO org.eclipse.jetty.server.ServerConnector - Started ServerConnector@5325abc3{HTTP/1.1,[http/1.1]}{0.0.0.0:3000}
[pool-1-thread-1] INFO org.eclipse.jetty.server.Server - Started @2688295ms

Stop a server
Reload an application
Show routing information

REPL> /routes app
GET    /                                        {controller=class kotowari.example.controller.ExampleController, action=index}
GET    /m1                                      {controller=class kotowari.example.controller.ExampleController, action=method1}
GET    /m2                                      {controller=class kotowari.example.controller.ExampleController, action=method2}
GET    /m3                                      {controller=class kotowari.example.controller.ExampleController, action=method3}
GET    /m4                                      {controller=class kotowari.example.controller.ExampleController, action=method4}
POST   /login                                   {controller=class kotowari.example.controller.LoginController, action=login}

Show middleware stack

REPL> /middleware app list
ANY   defaultCharset (enkan.middleware.DefaultCharsetMiddleware@4929dbc3)
NONE   serviceUnavailable (enkan.middleware.ServiceUnavailableMiddleware@2ee4fa3b)
ANY   stacktrace (enkan.middleware.StacktraceMiddleware@545872dd)
ANY   trace (enkan.middleware.TraceMiddleware@1c985ffd)
ANY   contentType (enkan.middleware.ContentTypeMiddleware@1b68686e)
ANY   httpStatusCat (enkan.middleware.HttpStatusCatMiddleware@12d47c1a)
ANY   params (enkan.middleware.ParamsMiddleware@58d3a07)
ANY   normalization (enkan.middleware.NormalizationMiddleware@5b34eafc)
ANY   cookies (enkan.middleware.CookiesMiddleware@347c2ec)
ANY   session (enkan.middleware.SessionMiddleware@32424a32)
ANY   resource (enkan.middleware.ResourceMiddleware@5e73037f)
ANY   routing (kotowari.middleware.RoutingMiddleware@226c7147)
ANY   domaTransaction (enkan.middleware.DomaTransactionMiddleware@1f819744)
ANY   form (kotowari.middleware.FormMiddleware@3f325d5c)
ANY   validateForm (kotowari.middleware.ValidateFormMiddleware@791cd93e)
ANY   htmlRenderer (enkan.middleware.HtmlRenderer@383b6913)
ANY   controllerInvoker (kotowari.middleware.ControllerInvokerMiddleware@2b13e2e7)

Rewrite a predicate of middleware

REPL> /middleware app predicate serviceUnavailable ANY
REPL> /middleware app list
ANY   defaultCharset (enkan.middleware.DefaultCharsetMiddleware@4929dbc3)
ANY   serviceUnavailable (enkan.middleware.ServiceUnavailableMiddleware@2ee4fa3b)
ANY   stacktrace (enkan.middleware.StacktraceMiddleware@545872dd)

Enkan REPL can attach to a running process.

enkan> /connect 35677
Connected to server (port = 35677)

If you use Java9 or higher, you can use JShellRepl. It's so great experience!!

enkan> /connect 64815
Connected to server (port = 64815)
enkan> system
EnkanSystem {
  "datasource":   #HikariCPComponent {
    "jdbcUrl": "jdbc:h2:mem:test",
    "username": "null",
    "dependencies": []
  },
  "flyway":   enkan.component.flyway.FlywayMigration@345f69f3,
  "doma":   #DomaProvider {
    "dependencies": ["flyway", "datasource"]
  },
  "jwt":   net.unit8.bouncr.sign.JsonWebToken@3f57bcad,
  "jackson":   #JacksonBeansConverter {
    "dependencies": []
  },
  "template":   enkan.component.freemarker.FreemarkerTemplateEngine@1e8b7643,
  "app":   #ApplicationComponent {
    "application": "null",
    "factoryClassName": "net.unit8.rascaloid.RascaloidApplicationFactory",
    "dependencies": ["template", "doma", "jackson", "datasource", "jwt"]
  },
  "http":   enkan.component.jetty.JettyComponent@7d286fb6
}

enkan> system.getComponent("doma")
#DomaProvider {
  "dependencies": ["flyway", "datasource"]
}

Kotowari

Kotowari is a web routing framework on Enkan.

It provides a rails-like syntax for routing definition.

Routes routes = Routes.define(r -> {
    r.get("/").to(ExampleController.class, "index");
    r.get("/m1").to(ExampleController.class, "method1");
    r.get("/m2").to(ExampleController.class, "method2");
    r.get("/m3").to(ExampleController.class, "method3");
    r.get("/m4").to(ExampleController.class, "method4");
    r.post("/login").to(LoginController.class, "login");
    r.resource(CustomerController.class);
}).compile();

Get started

kotowari-archetype is very useful at starting point.

% bash <(curl -L https://raw.githubusercontent.com/kawasima/kotowari-archetype/master/kotowari.sh)
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  2051  100  2051    0     0   5962      0 --:--:-- --:--:-- --:--:--  5944

╔═╗┌┐┌┬┌─┌─┐┌┐┌ ┬ ╦╔═┌─┐┌┬┐┌─┐┬ ┬┌─┐┬─┐┬
║╣ │││├┴┐├─┤│││┌┼─╠╩╗│ │ │ │ ││││├─┤├┬┘│
╚═╝┘└┘┴ ┴┴ ┴┘└┘└┘ ╩ ╩└─┘ ┴ └─┘└┴┘┴ ┴┴└─┴

Which web server component do you use?:
1) undertow
2) jetty
3) No thank you
#?

License

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.

kawasima / enkan Goto Github PK

enkan's Introduction

enkan

Concept

Minimal

Ease of development

Ease of operation

Requirements

Middleware

Components

Get started

Manual

EnkanSystem

Application

REPL

Kotowari

Get started

License

enkan's People

Contributors

Stargazers

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Forkers

enkan's Issues

Summary

Error

Form class does not implement java.io.Serializable

Monorepos

How to deactivate the project

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Form class does not implement `java.io.Serializable`