Akka-http

Open Access Quality Assurance & Related Software Development for Financial Markets Tel: +7 495 640 24 60 , +1 415 830 38 49
www.exactpro.com1
Akka-http
Open Access Quality Assurance & Related Software Development for Financial Markets
Tel: +7 495 640 2460, +1 415 830 38 49
www.exactpro.com
Дата 20.02.2017
Автор Антон Ситников

www.exactpro.com2
Дневник успеваемости
Понедельник
Математика
Физика
Литература 4
Физическая культура
Вторник
Русский язык 2
Математика
Английский язык 5
Технология

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Наше приложение
Single-page
web application
ДанныеWeb-сервис

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Single-page
web application
Ractive.js REST / JSON

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Single-page
web application
Ractive.js REST / JSON
SQL Server

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Single-page
web application

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Web-сервис
HTTP backend
Сервис
данных

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Web-сервис
akka-http akka JSON
HTTP backend
Сервис
данных

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Сервис данных
Студенты Расписание Предметы
Оценки

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01 public class ScheduleActor extends AbstractActor {
02
03 public ScheduleActor() {
04 receive(ReceiveBuilder
05 .match(SetSchedule.class,
06 command -> this.setSchedule(command.getGroupSchedules()))
07 .match(GetSchedule.class,
08 command -> this.getSchedule(command.getGroupId()))
09 .build());
10 }
11 }
ScheduleActor

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01 private final Map<Integer, Schedule> groupSchedules
02 = new HashMap<>();
03
04 private void setSchedule(final List<Schedule> groupSchedules) {
05 this.groupSchedules.clear();
06 groupSchedules.forEach(schedule ->
07 this.groupSchedules.put(schedule.getGroupId(), schedule));
08 }
09
10 private void getSchedule(final int groupId) {
11 this.sender().tell(
12 this.groupSchedules.get(groupId), this.self());
13 }
14 }
ScheduleActor

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SetSchedule
01 import static java.util.Collections.unmodifiableList;
02
03 public class SetSchedule {
04 private final List<Schedule> groupSchedules;
05
06 public SetSchedule(final List<Schedule> groupSchedules) {
07 this.groupSchedules = unmodifiableList(groupSchedules);
08 }
09
10 public List<Schedule> getGroupSchedules() {
11 return this.groupSchedules;
12 }
13 }

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Данные
Студенты Расписание Предметы
Оценки

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Markbook actor
MarkbookActor StudentsActor ScheduleActor SubjectsActor
GetStudent
Student
GetSchedule
Schedule
GetSubjects
List<Subjects>

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Markbook actor
MarkbookActor StudentsActor ScheduleActor SubjectsActor
GetStudent
Student
GetStudent
Student

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Child workers
Родитель

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Child workers
Родитель
Ребенок

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Child workers
Родитель
Ребенок Ребенок

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Child workers
Родитель

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Child workers
Родитель

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Markbook worker actor
WorkerActor StudentsActor ScheduleActor SubjectsActor
GetStudent
Student
GetSchedule
Schedule
GetSubjects
List<Subjects>

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Child workers
Markbook
Worker

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Markbook actor
WorkerActor StudentsActor ScheduleActor SubjectsActor
Set<Marks>
GetMarks
GetSchedule
Schedule
GetSubjects
List<Subjects>
Markbook
GetStudentMarks

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01 private static class WorkerActor extends AbstractActor {
02
03 public WorkerActor() {
04 receive(ReceiveBuilder
05 .match(GetStudentWeekMarks.class,
06 command -> this.start(
07 command.getStudentId(), command.getWeekNumber()))
08 .match(Student.class,
09 student -> this.processStudent(student))
10 .match(Schedule.class,
11 schedule -> this.processSchedule(schedule))
12 .match(SortedMap.class,
13 marks -> this.processMarks(marks))
14 .match(List.class,
15 subjects -> this.processSubjects(subjects))
16 .build());
17 }

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01 private void processSchedule(final Schedule schedule) {
02 this.schedule = schedule;
03 final HashSet<Integer> subjectIds = new HashSet<>();
04 schedule.getDays().forEach(
05 daySchedule -> subjectIds.addAll(daySchedule.getSubjectIds()));
06 this.context().actorSelection("/user/subjects").tell(
07 new GetSubjects(subjectIds), this.self());
08 this.context().actorSelection("..").tell(
09 new GetStudentWeekMarks(this.studentId, this.weekNumber),
10 this.self());
11 }

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01 private void processMarks(final SortedMap<MarkKey, Integer> marks) {
02 this.marks = marks;
03 this.replyIfReady();
04 }
05
06 private void replyIfReady() {
07 if ((this.marks != null) && (this.subjectIndex != null)) {
08 this.receiver.tell(unmodifiableList(this.getWeekMarks()),
09 this.self());
10 this.self().tell(PoisonPill.getInstance(), this.self());
11 }
12 }

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REST API
/api/students
/api/students/studentId/marks/weekNumber

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routing
01 private Route apiRoute() {
02 return pathPrefix("students", () ->
03 route(
04 rawPathPrefix(pathEnd(), () ->
05 onSuccess(() -> toJava(Patterns.ask(
06 this.studentStore, ListStudents.instance(), TIMEOUT)),
07 students -> complete(
08 StatusCodes.OK, students, Jackson.marshaller())
09 )
10 ),
11 path(
12 // ...

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routing
01 path(
studentId
02 integerSegment().slash(segment("marks")
weekNumber
03 .slash(integerSegment())),
04 (studentId, weekNumber) ->
05 onSuccess(
06 () -> toJava(Patterns.ask(
07 this.markbook,
08 new GetStudentWeekMarks(studentId, weekNumber), TIMEOUT)),
09 weekMarks -> complete(
10 StatusCodes.OK, weekMarks, Jackson.marshaller())
11 )
12 )
13 )
14 );
15 }

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routing
01 private Route appRoute() {
02 return route(
03 staticRoute(),
04 pathPrefix("api", () -> apiRoute())
05 );
06 }

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Запуск сервера
01 private void initializeServer() {
02 final ActorMaterializer materializer
03 = ActorMaterializer.create(this.system);
04 final ConnectHttp host = ConnectHttp.toHost("127.0.0.1");
05 Http.get(this.system).bindAndHandle(
06 appRoute().flow(this.system, materializer),
07 host, materializer);
08 }

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Спасибо

Akka-http

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