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This commit is contained in:
Tom Hombergs 2018-12-16 20:42:13 +01:00
parent 36decb42b9 91cc2514b2
commit 4321be4c58
8 changed files with 1345 additions and 984 deletions
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48
akka-http/pom.xml Normal file
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<?xml version="1.0"?>
<project
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<artifactId>akka-http</artifactId>
<name>akka-http</name>
<parent>
<artifactId>parent-modules</artifactId>
<groupId>com.baeldung</groupId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-http_2.12</artifactId>
<version>${akka.http.version}</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-stream_2.12</artifactId>
<version>2.5.11</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-http-jackson_2.12</artifactId>
<version>${akka.http.version}</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-http-testkit_2.12</artifactId>
<version>${akka.http.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<akka.http.version>10.0.11</akka.http.version>
<akka.stream.version>2.5.11</akka.stream.version>
</properties>
</project>

30
akka-http/src/main/java/com/baeldung/akkahttp/User.java Normal file
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package com.baeldung.akkahttp;
/**
* User Entity
*
*/
public class User {
private final String name;
private final String address;
public User() {
this.name = "";
this.address = "";
}
public User(String name, String address) {
this.name = name;
this.address = address;
}
public String getName() {
return name;
}
public String getAddress() {
return address;
}
}

41
akka-http/src/main/java/com/baeldung/akkahttp/UserActor.java Normal file
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package com.baeldung.akkahttp;
import akka.actor.AbstractActor;
import akka.actor.Props;
import akka.japi.pf.FI;
import com.baeldung.akkahttp.UserMessages.ActionPerformed;
import com.baeldung.akkahttp.UserMessages.CreateUserMessage;
import com.baeldung.akkahttp.UserMessages.GetUserMessage;
class UserActor extends AbstractActor {
private UserService userService = new UserService();
static Props props() {
return Props.create(UserActor.class);
}
@Override
public Receive createReceive() {
return receiveBuilder()
.match(CreateUserMessage.class, handleCreateUser())
.match(GetUserMessage.class, handleGetUser())
.build();
}
private FI.UnitApply<CreateUserMessage> handleCreateUser() {
return createUserMessageMessage -> {
userService.createUser(createUserMessageMessage.getUser());
sender().tell(new ActionPerformed(String.format("User %s created.", createUserMessageMessage.getUser()
.getName())), getSelf());
};
}
private FI.UnitApply<GetUserMessage> handleGetUser() {
return getUserMessageMessage -> {
sender().tell(userService.getUser(getUserMessageMessage.getUserId()), getSelf());
};
}
}

72
akka-http/src/main/java/com/baeldung/akkahttp/UserMessages.java Normal file
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package com.baeldung.akkahttp;
import java.io.Serializable;
/**
* Defines all messages related to User Actor
*
*/
public interface UserRegistryMessages {
class GetUsers implements Serializable {
private static final long serialVersionUID = 1L;
}
class ActionPerformed implements Serializable {
private static final long serialVersionUID = 1L;
private final String description;
public ActionPerformed(String description) {
this.description = description;
}
public String getDescription() {
return description;
}
}
class CreateUser implements Serializable {
private static final long serialVersionUID = 1L;
private final User user;
public CreateUser(User user) {
this.user = user;
}
public User getUser() {
return user;
}
}
class GetUser implements Serializable {
private static final long serialVersionUID = 1L;
private final String name;
public GetUser(String name) {
this.name = name;
}
public String getName() {
return name;
}
}
class DeleteUser implements Serializable {
private static final long serialVersionUID = 1L;
private final String name;
public DeleteUser(String name) {
this.name = name;
}
public String getName() {
return name;
}
}
}

72
akka-http/src/main/java/com/baeldung/akkahttp/UserServer.java Normal file
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package com.baeldung.akkahttp;
import java.util.Optional;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.TimeUnit;
import akka.actor.ActorRef;
import akka.http.javadsl.marshallers.jackson.Jackson;
import akka.http.javadsl.model.StatusCodes;
import akka.http.javadsl.server.AllDirectives;
import akka.http.javadsl.server.Route;
import akka.pattern.PatternsCS;
import akka.util.Timeout;
import com.baeldung.akkahttp.UserMessages.ActionPerformed;
import com.baeldung.akkahttp.UserMessages.CreateUser;
import scala.concurrent.duration.Duration;
import static akka.http.javadsl.server.PathMatchers.*;
class UserRoutes extends AllDirectives {
private final ActorRef userActor;
Timeout timeout = new Timeout(Duration.create(5, TimeUnit.SECONDS));
UserRoutes(ActorRef userActor) {
this.userActor = userActor;
}
Route routes() {
return path("users", this::postUser)
.orElse(path(segment("users").slash(longSegment()), id ->
route(getUser(id),
deleteUser(id))));
}
private Route getUser(Long id) {
return get(() -> {
CompletionStage<Optional<User>> user = PatternsCS.ask(userActor, new UserMessages.GetUser(id), timeout)
.thenApply(obj -> (Optional<User>) obj);
return onSuccess(() -> user, performed -> {
if (performed.isPresent())
return complete(StatusCodes.OK, performed.get(), Jackson.marshaller());
else
return complete(StatusCodes.NOT_FOUND);
});
});
}
private Route deleteUser(Long id) {
return delete(() -> {
CompletionStage<ActionPerformed> userDeleted = PatternsCS.ask(userActor, new UserMessages.DeleteUser(id), timeout)
.thenApply(obj -> (ActionPerformed) obj);
return onSuccess(() -> userDeleted, performed -> {
return complete(StatusCodes.OK, performed, Jackson.marshaller());
});
});
}
private Route postUser() {
return route(post(() -> entity(Jackson.unmarshaller(User.class), user -> {
CompletionStage<ActionPerformed> userCreated = PatternsCS.ask(userActor, new CreateUser(user), timeout)
.thenApply(obj -> (ActionPerformed) obj);
return onSuccess(() -> userCreated, performed -> {
return complete(StatusCodes.CREATED, performed, Jackson.marshaller());
});
})));
}
}

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akka-http/src/main/java/com/baeldung/akkahttp/UserService.java Normal file
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package com.baeldung.akkahttp;
public class UserService {
}

50
akka-http/src/test/java/com/baeldung/akkahttp/UserServerUnitTest.java Normal file
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package com.baeldung.akkahttp;
import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.http.javadsl.model.ContentTypes;
import akka.http.javadsl.model.HttpEntities;
import akka.http.javadsl.model.HttpRequest;
import akka.http.javadsl.testkit.JUnitRouteTest;
import akka.http.javadsl.testkit.TestRoute;
import org.junit.Test;
public class UserRoutesUnitTest extends JUnitRouteTest {
ActorSystem system = ActorSystem.create("helloAkkaHttpServer");
ActorRef userActorRef = system.actorOf(UserActor.props(), "userActor");
TestRoute appRoute = testRoute(new UserRoutes(userActorRef).routes());
@Test
public void whenRequest_thenActorResponds() {
appRoute.run(HttpRequest.GET("/users/1"))
.assertEntity(alice())
.assertStatusCode(200);
appRoute.run(HttpRequest.GET("/users/42"))
.assertStatusCode(404);
appRoute.run(HttpRequest.DELETE("/users/1"))
.assertStatusCode(200);
appRoute.run(HttpRequest.DELETE("/users/42"))
.assertStatusCode(200);
appRoute.run(HttpRequest.POST("/users")
.withEntity(HttpEntities.create(ContentTypes.APPLICATION_JSON, zaphod())))
.assertStatusCode(201);
}
private String alice() {
return "{\"id\":1,\"name\":\"Alice\"}";
}
private String zaphod() {
return "{\"id\":42,\"name\":\"Zaphod\"}";
}
}

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pom.xml
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