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WebSub fixes

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This commit is contained in:
Marcel 2021-12-12 19:41:41 +01:00
parent 32bf461026
commit 7a66f37556
9 changed files with 106 additions and 77 deletions
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30
tapas-auction-house/src/main/java/ch/unisg/tapas/TapasAuctionHouseApplication.java
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@ -3,20 +3,18 @@ package ch.unisg.tapas;
import ch.unisg.tapas.auctionhouse.adapter.common.clients.TapasMqttClient;
import ch.unisg.tapas.auctionhouse.adapter.in.messaging.mqtt.AuctionEventsMqttDispatcher;
import ch.unisg.tapas.auctionhouse.domain.AuctionHouseDiscovery;
import ch.unisg.tapas.auctionhouse.domain.AuctionHouseDiscoveryInformation;
import ch.unisg.tapas.auctionhouse.adapter.common.clients.WebSubSubscriber;
import ch.unisg.tapas.common.AuctionHouseResourceDirectory;
import ch.unisg.tapas.common.ConfigProperties;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.Environment;
import java.net.URI;
import java.util.List;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
@ -28,23 +26,17 @@ import java.util.concurrent.TimeUnit;
public class TapasAuctionHouseApplication {
private static final Logger LOGGER = LogManager.getLogger(TapasAuctionHouseApplication.class);
public static String RESOURCE_DIRECTORY = "http://localhost:3500";
public static String DEFAULT_MQTT_BROKER = "tcp://broker.hivemq.com:1883";
private static ConfigurableEnvironment ENVIRONMENT;
public static void main(String[] args) {
SpringApplication tapasAuctioneerApp = new SpringApplication(TapasAuctionHouseApplication.class);
ENVIRONMENT = tapasAuctioneerApp.run(args).getEnvironment();
// TODO Set start up of message services with config
// We will use these bootstrap methods in Week 6:
bootstrapMarketplaceWithWebSub();
bootstrapMarketplaceWithMqtt();
ScheduledExecutorService executor = Executors.newScheduledThreadPool(1);
executor.scheduleAtFixedRate(crawlerRunnable, 30, 30, TimeUnit.SECONDS);
// bootstrapMarketplaceWithMqtt()
}
/**
* Discovers auction houses and subscribes to WebSub notifications
@ -52,11 +44,12 @@ public class TapasAuctionHouseApplication {
private static void bootstrapMarketplaceWithWebSub() {
discoverAuctionHouseEndpoints();
// WebSubSubscriber subscriber = new WebSubSubscriber();
WebSubSubscriber subscriber = new WebSubSubscriber(ENVIRONMENT.getProperty("auctionhouse.uri"));
// for (String endpoint : auctionHouseEndpoints) {
// subscriber.subscribeToAuctionHouseEndpoint(URI.create(endpoint));
// }
for (AuctionHouseDiscoveryInformation endpoint : AuctionHouseDiscovery.getInstance().getAuctionHouseDiscoveryList()) {
subscriber.subscribeToAuctionHouseEndpoint(endpoint.getWebSubUri().getValue());
}
//subscriber.subscribeToAuctionHouseEndpoint("https://websub.rocks/blog/100/v7wVgkzRrZXTadY3pXjx");
}
/**
@ -83,17 +76,20 @@ public class TapasAuctionHouseApplication {
private static void discoverAuctionHouseEndpoints() {
AuctionHouseResourceDirectory rd = new AuctionHouseResourceDirectory(
URI.create(RESOURCE_DIRECTORY)
URI.create(ENVIRONMENT.getProperty("discovery.endpoint.uri"))
);
AuctionHouseDiscovery.getInstance().addAuctionHouseDiscoveryInformation(rd.retrieveAuctionHouseEndpoints());
ScheduledExecutorService executor = Executors.newScheduledThreadPool(1);
executor.scheduleAtFixedRate(crawlerRunnable, 300, 300, TimeUnit.SECONDS);
}
private static Runnable crawlerRunnable = new Runnable() {
public void run() {
AuctionHouseResourceDirectory rd = new AuctionHouseResourceDirectory(
URI.create(RESOURCE_DIRECTORY)
URI.create(ENVIRONMENT.getProperty("discovery.endpoint.uri"))
);
AuctionHouseDiscovery.getInstance().addAuctionHouseDiscoveryInformation(rd.retrieveAuctionHouseEndpoints());

70
tapas-auction-house/src/main/java/ch/unisg/tapas/auctionhouse/adapter/common/clients/WebSubSubscriber.java
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@ -2,9 +2,11 @@ package ch.unisg.tapas.auctionhouse.adapter.common.clients;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.HashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
@ -18,22 +20,23 @@ import org.springframework.http.HttpStatus;
*/
public class WebSubSubscriber {
// TODO get this somehow from properties file. But on clue how to do this with static variables
static String WEBSUB_HUB_ENDPOINT = "http://localhost:3000";
static String AUCTION_HOUSE_ENDPOINT = "http://localhost:8086";
Logger logger = Logger.getLogger(WebSubSubscriber.class.getName());
public void subscribeToAuctionHouseEndpoint(URI endpoint) {
// TODO decide with other groups about auction house endpoint uri to discover websub topics
// and replace the hardcoded one with it
String topic = discoverWebSubTopic("http://localhost:3100/websub");
String AUCTION_HOUSE_ENDPOINT;
if (topic == null) {
public WebSubSubscriber(String AUCTION_HOUSE_ENDPOINT) {
this.AUCTION_HOUSE_ENDPOINT = AUCTION_HOUSE_ENDPOINT;
}
public void subscribeToAuctionHouseEndpoint(URI endpoint) {
HashMap<String, String> links = discoverWebSubTopic(endpoint);
if (links.isEmpty()) {
return;
}
subscribeToWebSub(topic);
subscribeToWebSub(links.get("hub"), links.get("self"));
// Shoudl be done :D
// TODO Subscribe to the auction house endpoint via WebSub:
@ -52,23 +55,30 @@ public class WebSubSubscriber {
// - the implementation notes of the WebSub hub you are using to distribute events
}
private String discoverWebSubTopic(String endpoint) {
private HashMap<String, String> discoverWebSubTopic(URI endpoint) {
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create(endpoint))
.uri(endpoint)
.header("Content-Type", "application/json")
.GET()
.build();
HashMap<String, String> links = new HashMap<>();
try {
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
if (response.statusCode() == HttpStatus.OK.value()) {
// TODO decide with other groups about response structure and replace the hardcoded
// uri with response uri
JSONObject jsonObject = new JSONObject(response.body());
System.out.println(jsonObject);
return jsonObject.getString("topic");
for (String link : response.headers().allValues("link")) {
if (link.contains("rel=\"hub\"")) {
String hub = link.split(">")[0];
links.put("hub", hub.substring(1));
} else if(link.contains("rel=\"self\"")) {
String self = link.split(">")[0];
links.put("self", self.substring(1));
}
System.out.println(link);
}
// TODO check for HTML tags second if links are not present in headers
} else {
logger.log(Level.SEVERE, "Could not find a websub uri");
}
@ -78,24 +88,26 @@ public class WebSubSubscriber {
} catch (IOException e) {
logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
}
return null;
return links;
}
private void subscribeToWebSub(String topic) {
private void subscribeToWebSub(String hub, String topic) {
HttpClient client = HttpClient.newHttpClient();
String body = new JSONObject()
.put("hub.callback", AUCTION_HOUSE_ENDPOINT + "/auction-started")
.put("hub.mode", "subscribe")
.put("hub.topic", topic)
.put("hub.ws", false)
.toString();
URI hubURI;
try {
hubURI = new URI(hub);
} catch (URISyntaxException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return;
}
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create(WEBSUB_HUB_ENDPOINT))
.header("Content-Type", "application/json")
.POST(HttpRequest.BodyPublishers.ofString(body))
.uri(hubURI)
.header("Content-Type", "application/x-www-form-urlencoded")
.POST(HttpRequest.BodyPublishers.ofString("hub.mode=subscribe&hub.callback=" + AUCTION_HOUSE_ENDPOINT +
"/auction-started/74c72c7f-2739-4124-aa35-a3225171a97c" + "&hub.topic=" + topic))
.build();

5
tapas-auction-house/src/main/java/ch/unisg/tapas/auctionhouse/adapter/in/messaging/websub/AuctionStartedEventListenerWebSubAdapter.java
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@ -34,9 +34,12 @@ public class AuctionStartedEventListenerWebSubAdapter {
* @return 200 OK
* @throws URISyntaxException
**/
@PostMapping(path = "/auction-started")
// TODO generate a new capability ID instead of using a hardcoded one.
@PostMapping(path = "/auction-started/74c72c7f-2739-4124-aa35-a3225171a97c")
public ResponseEntity<Void> handleExecutorAddedEvent(@RequestBody Collection<AuctionJsonRepresentation> payload) throws URISyntaxException {
System.out.println("new auctions :O");
for (AuctionJsonRepresentation auction : payload) {
auctionStartedHandler.handleAuctionStartedEvent(
new AuctionStartedEvent(

33
tapas-auction-house/src/main/java/ch/unisg/tapas/auctionhouse/adapter/in/messaging/websub/DiscoverWebSubAdapter.java Normal file
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@ -0,0 +1,33 @@
package ch.unisg.tapas.auctionhouse.adapter.in.messaging.websub;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpHeaders;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
/**
* This class is a template for handling auction started events received via WebSub
*/
@RestController
public class DiscoverWebSubAdapter {
@Value("${websub.hub.uri}")
private String webSubHubUri;
@Value("${auctionhouse.uri}")
private String auctionHouseUri;
/**
* Controller which listens to auction-started callbacks
* @return 200 OK
**/
@GetMapping(path = "/websub/auctions")
public ResponseEntity<String> handleDiscoverWebSubAuction() {
HttpHeaders header = new HttpHeaders();
header.add("link", "<" + auctionHouseUri + "/auctions/>; rel=\"self\"");
header.add("link", "<" + webSubHubUri + ">; rel=\"hub\"");
return ResponseEntity.ok().headers(header).body("");
}
}

18
tapas-auction-house/src/main/java/ch/unisg/tapas/auctionhouse/adapter/in/messaging/websub/ValidateIntentWebSubAdapter.java
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@ -13,21 +13,9 @@ import org.springframework.web.bind.annotation.*;
@RestController
public class ValidateIntentWebSubAdapter {
@Value("${application.environment}")
private String environment;
@GetMapping(path = "/auction-started")
// TODO generate a new capability ID instead of using a hardcoded one.
@GetMapping(path = "/auction-started/74c72c7f-2739-4124-aa35-a3225171a97c")
public ResponseEntity<String> validateIntent(@RequestParam("hub.challenge") String challenge) {
// Different implementation depending on local development or production
if (environment.equalsIgnoreCase("development")) {
HttpHeaders headers = new HttpHeaders();
headers.add("Content-Type", "application/json");
String body = new JSONObject()
.put("hub.challenge", challenge)
.toString();
return new ResponseEntity<>(body, headers, HttpStatus.OK);
} else {
return new ResponseEntity<>(challenge, HttpStatus.OK);
}
return new ResponseEntity<>(challenge, HttpStatus.OK);
}
}

1
tapas-auction-house/src/main/java/ch/unisg/tapas/auctionhouse/adapter/out/messaging/mqtt/PublishAuctionStartedEventMqttAdapter.java
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@ -15,7 +15,6 @@ import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Component;
@Component
@Primary
public class PublishAuctionStartedEventMqttAdapter implements AuctionStartedEventPort {
private static final Logger LOGGER = LogManager.getLogger(PublishAuctionStartedEventMqttAdapter.class);

13
tapas-auction-house/src/main/java/ch/unisg/tapas/auctionhouse/adapter/out/messaging/websub/PublishAuctionStartedEventWebSubAdapter.java
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@ -29,12 +29,8 @@ import java.util.stream.Collectors;
* This class is a template for publishing auction started events via WebSub.
*/
@Component
@Primary
public class PublishAuctionStartedEventWebSubAdapter implements AuctionStartedEventPort {
// You can use this object to retrieve properties from application.properties, e.g. the
// WebSub hub publish endpoint, etc.
@Autowired
private ConfigProperties config;
@Value("${auctionhouse.uri}")
private String auctionHouseUri;
@ -47,15 +43,12 @@ public class PublishAuctionStartedEventWebSubAdapter implements AuctionStartedEv
public void publishAuctionStartedEvent(AuctionStartedEvent event) {
HttpClient client = HttpClient.newHttpClient();
String body = new JSONObject()
.put("hub.url", auctionHouseUri + "/auctions")
.put("hub.mode", "publish")
.toString();
String body = "hub.url=" + auctionHouseUri + "/auctions/&hub.mode=publish";
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create(webSubHubUri))
.header("Content-Type", "application/json")
.header("Content-Type", "application/x-www-form-urlencoded")
.POST(HttpRequest.BodyPublishers.ofString(body))
.build();

7
tapas-auction-house/src/main/java/ch/unisg/tapas/auctionhouse/domain/AuctionHouseDiscovery.java
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@ -20,6 +20,9 @@ public class AuctionHouseDiscovery {
}
};
// TODO load from config
static String AUCTION_HOUSE_URI = "http://localhost:8086";
@Getter
private List<AuctionHouseDiscoveryInformation> auctionHouseDiscoveryList = new ArrayList<>() {
};
@ -28,8 +31,8 @@ public class AuctionHouseDiscovery {
try {
// Add our information to list
auctionHouseDiscoveryList.add(new AuctionHouseDiscoveryInformation(
new AuctionHouseDiscoveryInformation.AuctionHouseUri(new URI("http://localhost:8086")),
new AuctionHouseDiscoveryInformation.WebSubUri(new URI("http://localhost:8086/websub")),
new AuctionHouseDiscoveryInformation.AuctionHouseUri(new URI(AUCTION_HOUSE_URI)),
new AuctionHouseDiscoveryInformation.WebSubUri(new URI(AUCTION_HOUSE_URI + "/websub/auctions")),
new AuctionHouseDiscoveryInformation.TaskTypes(tasktypes),
new AuctionHouseDiscoveryInformation.TimeStamp(new Timestamp(new Date().getTime())),
new AuctionHouseDiscoveryInformation.GroupName("Group 1")

6
tapas-auction-house/src/main/resources/application.properties
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@ -10,6 +10,8 @@ auction.house.uri=https://tapas-auction-house.86-119-35-40.nip.io
tasks.list.uri=http://localhost:8081
application.environment=development
auctionhouse.uri=http://localhost:8086
websub.hub.uri=http://localhost:3000
auctionhouse.uri=http://fe10-77-59-152-182.eu.ngrok.io
websub.hub.uri=https://pubsubhubbub.appspot.com
mqtt.broker.uri=tcp://localhost:1883
discovery.endpoint.uri=http://localhost:3500/discovery/