Merge remote-tracking branch 'play-java-jpa-example/2.6.x' into 2.6.x

* play-java-jpa-example/2.6.x: (48 commits)
  Nest play-java-jpa-example
  Updated with template-control on 2019-02-13T20:25:39.298Z (playframework#87)
  Upgrade branch 2.6.x using TemplateControl (playframework#85)
  Upgrade branch 2.6.x using TemplateControl (playframework#84)
  Upgrade branch 2.6.x using TemplateControl (playframework#83)
  Updated with template-control on 2019-01-08T14:44:42.531Z (playframework#81)
  Updated with template-control on 2019-01-04T17:13:23.827Z (playframework#76)
  Upgrade branch 2.6.x using TemplateControl (playframework#71)
  Upgrade branch 2.6.x using TemplateControl (playframework#69)
  Updated with template-control on 2018-09-11T20:14:50.333Z (playframework#65)
  Updated with template-control on 2018-08-20T20:37:13.878Z (playframework#63)
  Updated with template-control on 2018-07-19T01:58:55.873Z (playframework#61)
  Updated with template-control on 2018-07-16T18:38:45.441Z (playframework#60)
  Upgrade branch 2.6.x using TemplateControl (playframework#59)
  Updated with template-control on 2018-05-27T23:54:09.603Z (playframework#58)
  Updated with template-control on 2018-04-06T19:34:58.092Z (playframework#55)
  Updated with template-control on 2018-03-02T18:56:28.087Z (playframework#54)
  Upgrade branch 2.6.x using TemplateControl (playframework#53)
  Fix cross build to sbt 1.1.0 (playframework#52)
  Upgrade branch 2.6.x using TemplateControl (playframework#51)
  ...

play-java-jpa-example/.gitignore

@@ -0,0 +1,10 @@
+logs
+target
+build
+/.idea
+/.idea_modules
+/.classpath
+/.project
+/.gradle
+/.settings
+/RUNNING_PID

play-java-jpa-example/.mergify.yml

@@ -0,0 +1,27 @@
+pull_request_rules:
+  - name: automatic merge on CI success require review
+    conditions:
+      - status-success=Travis CI - Pull Request
+      - "#approved-reviews-by>=1"
+      - "#changes-requested-reviews-by=0"
+      - label!=block-merge
+    actions:
+      merge:
+        method: squash
+        strict: smart
+
+  - name: automatic merge on CI success for TemplateControl
+    conditions:
+      - status-success=Travis CI - Pull Request
+      - label=merge-when-green
+      - label!=block-merge
+    actions:
+      merge:
+        method: squash
+        strict: smart
+
+  - name: delete branch after merge
+    conditions:
+      - merged
+    actions:
+      delete_head_branch: {}

play-java-jpa-example/.travis.yml

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+language: scala
+scala:
+  - 2.12.8
+
+before_install:
+  - curl -sL https://github.com/shyiko/jabba/raw/master/install.sh | bash && . ~/.jabba/jabba.sh
+
+env:
+  global:
+    - JABBA_HOME=$HOME/.jabba
+  matrix:
+    # There is no concise way to specify multi-dimensional build matrix:
+    # https://github.com/travis-ci/travis-ci/issues/1519
+    - SCRIPT=scripts/test-sbt     [email protected]
+    - SCRIPT=scripts/test-sbt     [email protected]
+    - SCRIPT=scripts/test-gradle  [email protected]
+    - SCRIPT=scripts/test-gradle  [email protected]
+
+# Exclude some combinations from build matrix. See:
+# https://docs.travis-ci.com/user/customizing-the-build/#Build-Matrix
+matrix:
+  fast_finish: true
+  allow_failures:
+    # Current release of Gradle still does not supports Play 2.7.x releases
+    # As soon as there is a release of Gradle that fixes that, we can then
+    # remove this allowed failure.
+    - env: SCRIPT=scripts/test-gradle  [email protected]
+    - env: SCRIPT=scripts/test-gradle  [email protected]
+    # Java 11 is still not fully supported. It is good that we are already
+    # testing our sample applications to better discover possible problems
+    # but we can allow failures here too.
+    - env: SCRIPT=scripts/test-sbt     [email protected]
+
+install:
+  - $JABBA_HOME/bin/jabba install $TRAVIS_JDK
+  - unset _JAVA_OPTIONS
+  - export JAVA_HOME="$JABBA_HOME/jdk/$TRAVIS_JDK" && export PATH="$JAVA_HOME/bin:$PATH" && java -Xmx32m -version
+
+script:
+  - $SCRIPT
+
+before_cache:
+  - find $HOME/.ivy2 -name "ivydata-*.properties" -delete
+  - find $HOME/.sbt -name "*.lock" -delete
+
+cache:
+  directories:
+    - "$HOME/.ivy2/cache"
+    - "$HOME/.gradle/caches"
+    - "$HOME/.jabba/jdk"

play-java-jpa-example/LICENSE

@@ -0,0 +1,116 @@
+CC0 1.0 Universal
+
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play-java-jpa-example/NOTICE

@@ -0,0 +1,8 @@
+Written by Lightbend <[email protected]>
+
+To the extent possible under law, the author(s) have dedicated all copyright and
+related and neighboring rights to this software to the public domain worldwide.
+This software is distributed without any warranty.
+
+You should have received a copy of the CC0 Public Domain Dedication along with
+this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.

play-java-jpa-example/README.md

@@ -0,0 +1,11 @@
+[<img src="https://img.shields.io/travis/playframework/play-java-jpa-example.svg"/>](https://travis-ci.org/playframework/play-java-jpa-example)
+
+# play-java-jpa-example
+
+This project demonstrates how to create a simple database application with Play, using JPA.
+
+Please see the Play documentation for more details:
+
+* https://www.playframework.com/documentation/latest/JavaJPA
+* https://www.playframework.com/documentation/latest/ThreadPools
+* https://www.playframework.com/documentation/latest/JavaAsync

play-java-jpa-example/app/assets/javascripts/index.coffee

@@ -0,0 +1,4 @@
+$ ->
+  $.get "/persons", (persons) ->
+    $.each persons, (index, person) ->
+      $("#persons").append $("<li>").text person.name

play-java-jpa-example/app/controllers/PersonController.java

@@ -0,0 +1,51 @@
+package controllers;
+
+import models.Person;
+import models.PersonRepository;
+import play.data.FormFactory;
+import play.libs.concurrent.HttpExecutionContext;
+import play.mvc.Controller;
+import play.mvc.Result;
+
+import javax.inject.Inject;
+import java.util.concurrent.CompletionStage;
+import java.util.stream.Collectors;
+
+import static play.libs.Json.toJson;
+
+/**
+ * The controller keeps all database operations behind the repository, and uses
+ * {@link play.libs.concurrent.HttpExecutionContext} to provide access to the
+ * {@link play.mvc.Http.Context} methods like {@code request()} and {@code flash()}.
+ */
+public class PersonController extends Controller {
+
+    private final FormFactory formFactory;
+    private final PersonRepository personRepository;
+    private final HttpExecutionContext ec;
+
+    @Inject
+    public PersonController(FormFactory formFactory, PersonRepository personRepository, HttpExecutionContext ec) {
+        this.formFactory = formFactory;
+        this.personRepository = personRepository;
+        this.ec = ec;
+    }
+
+    public Result index() {
+        return ok(views.html.index.render());
+    }
+
+    public CompletionStage<Result> addPerson() {
+        Person person = formFactory.form(Person.class).bindFromRequest().get();
+        return personRepository.add(person).thenApplyAsync(p -> {
+            return redirect(routes.PersonController.index());
+        }, ec.current());
+    }
+
+    public CompletionStage<Result> getPersons() {
+        return personRepository.list().thenApplyAsync(personStream -> {
+            return ok(toJson(personStream.collect(Collectors.toList())));
+        }, ec.current());
+    }
+
+}

play-java-jpa-example/app/models/DatabaseExecutionContext.java

@@ -0,0 +1,36 @@
+package models;
+
+import akka.actor.ActorSystem;
+import scala.concurrent.ExecutionContext;
+import scala.concurrent.ExecutionContextExecutor;
+
+import javax.inject.Inject;
+
+/**
+ * Custom execution context wired to "database.dispatcher" thread pool
+ */
+public class DatabaseExecutionContext implements ExecutionContextExecutor {
+    private final ExecutionContext executionContext;
+
+    private static final String name = "database.dispatcher";
+
+    @Inject
+    public DatabaseExecutionContext(ActorSystem actorSystem) {
+        this.executionContext = actorSystem.dispatchers().lookup(name);
+    }
+
+    @Override
+    public ExecutionContext prepare() {
+        return executionContext.prepare();
+    }
+
+    @Override
+    public void execute(Runnable command) {
+        executionContext.execute(command);
+    }
+
+    @Override
+    public void reportFailure(Throwable cause) {
+        executionContext.reportFailure(cause);
+    }
+}

play-java-jpa-example/app/models/JPAPersonRepository.java

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+package models;
+
+import play.db.jpa.JPAApi;
+
+import javax.inject.Inject;
+import javax.persistence.EntityManager;
+import java.util.List;
+import java.util.concurrent.CompletionStage;
+import java.util.function.Function;
+import java.util.stream.Stream;
+
+import static java.util.concurrent.CompletableFuture.supplyAsync;
+
+/**
+ * Provide JPA operations running inside of a thread pool sized to the connection pool
+ */
+public class JPAPersonRepository implements PersonRepository {
+
+    private final JPAApi jpaApi;
+    private final DatabaseExecutionContext executionContext;
+
+    @Inject
+    public JPAPersonRepository(JPAApi jpaApi, DatabaseExecutionContext executionContext) {
+        this.jpaApi = jpaApi;
+        this.executionContext = executionContext;
+    }
+
+    @Override
+    public CompletionStage<Person> add(Person person) {
+        return supplyAsync(() -> wrap(em -> insert(em, person)), executionContext);
+    }
+
+    @Override
+    public CompletionStage<Stream<Person>> list() {
+        return supplyAsync(() -> wrap(em -> list(em)), executionContext);
+    }
+
+    private <T> T wrap(Function<EntityManager, T> function) {
+        return jpaApi.withTransaction(function);
+    }
+
+    private Person insert(EntityManager em, Person person) {
+        em.persist(person);
+        return person;
+    }
+
+    private Stream<Person> list(EntityManager em) {
+        List<Person> persons = em.createQuery("select p from Person p", Person.class).getResultList();
+        return persons.stream();
+    }
+}

play-java-jpa-example/app/models/Person.java

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+package models;
+
+import javax.persistence.*;
+
+@Entity
+public class Person {
+
+    @Id
+    @GeneratedValue(strategy=GenerationType.AUTO)
+	public Long id;
+
+    public String name;
+}