diff --git a/pom.xml b/pom.xml index 20ad5160d9..dae7e4b9c7 100644 --- a/pom.xml +++ b/pom.xml @@ -550,7 +550,8 @@ apache-meecrowave spring-reactive-kotlin jnosql - testing-modules/junit-abstract + testing-modules/junit-abstract + sse-jaxrs diff --git a/sse-jaxrs/pom.xml b/sse-jaxrs/pom.xml new file mode 100644 index 0000000000..ac9bff937f --- /dev/null +++ b/sse-jaxrs/pom.xml @@ -0,0 +1,22 @@ + + + 4.0.0 + + com.baeldung.sse + sse-jaxrs + 1.0-SNAPSHOT + pom + + + 1.8 + 1.8 + + + + sse-jaxrs-server + sse-jaxrs-client + + + diff --git a/sse-jaxrs/sse-jaxrs-client/pom.xml b/sse-jaxrs/sse-jaxrs-client/pom.xml new file mode 100644 index 0000000000..a9068e133f --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-client/pom.xml @@ -0,0 +1,62 @@ + + + 4.0.0 + + + com.baeldung.sse + sse-jaxrs + 1.0-SNAPSHOT + + + sse-jaxrs-client + + + 3.2.0 + + + + + + org.codehaus.mojo + exec-maven-plugin + 1.6.0 + + + singleEvent + + java + + + com.baeldung.sse.jaxrs.client.SseClientApp + + + + broadcast + + java + + + com.baeldung.sse.jaxrs.client.SseClientBroadcastApp + + + + + + + + + + org.apache.cxf + cxf-rt-rs-client + ${cxf-version} + + + org.apache.cxf + cxf-rt-rs-sse + ${cxf-version} + + + + diff --git a/sse-jaxrs/sse-jaxrs-client/src/main/java/com/baeldung/sse/jaxrs/client/SseClientApp.java b/sse-jaxrs/sse-jaxrs-client/src/main/java/com/baeldung/sse/jaxrs/client/SseClientApp.java new file mode 100644 index 0000000000..5d42b3a243 --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-client/src/main/java/com/baeldung/sse/jaxrs/client/SseClientApp.java @@ -0,0 +1,48 @@ +package com.baeldung.sse.jaxrs.client; + +import javax.ws.rs.client.Client; +import javax.ws.rs.client.ClientBuilder; +import javax.ws.rs.client.WebTarget; +import javax.ws.rs.sse.InboundSseEvent; +import javax.ws.rs.sse.SseEventSource; +import java.util.function.Consumer; + +public class SseClientApp { + + private static final String url = "http://127.0.0.1:9080/sse-jaxrs-server/sse/stock/prices"; + + public static void main(String... args) throws Exception { + + Client client = ClientBuilder.newClient(); + WebTarget target = client.target(url); + try (SseEventSource eventSource = SseEventSource.target(target).build()) { + + eventSource.register(onEvent, onError, onComplete); + eventSource.open(); + + //Consuming events for one hour + Thread.sleep(60 * 60 * 1000); + } catch (InterruptedException e) { + e.printStackTrace(); + } + client.close(); + System.out.println("End"); + } + + // A new event is received + private static Consumer onEvent = (inboundSseEvent) -> { + String data = inboundSseEvent.readData(); + System.out.println(data); + }; + + //Error + private static Consumer onError = (throwable) -> { + throwable.printStackTrace(); + }; + + //Connection close and there is nothing to receive + private static Runnable onComplete = () -> { + System.out.println("Done!"); + }; + +} diff --git a/sse-jaxrs/sse-jaxrs-client/src/main/java/com/baeldung/sse/jaxrs/client/SseClientBroadcastApp.java b/sse-jaxrs/sse-jaxrs-client/src/main/java/com/baeldung/sse/jaxrs/client/SseClientBroadcastApp.java new file mode 100644 index 0000000000..9afc187a6d --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-client/src/main/java/com/baeldung/sse/jaxrs/client/SseClientBroadcastApp.java @@ -0,0 +1,52 @@ +package com.baeldung.sse.jaxrs.client; + +import javax.ws.rs.client.Client; +import javax.ws.rs.client.ClientBuilder; +import javax.ws.rs.client.WebTarget; +import javax.ws.rs.sse.InboundSseEvent; +import javax.ws.rs.sse.SseEventSource; +import java.util.concurrent.TimeUnit; +import java.util.function.Consumer; + +public class SseClientBroadcastApp { + + private static final String subscribeUrl = "http://localhost:9080/sse-jaxrs-server/sse/stock/subscribe"; + + + public static void main(String... args) throws Exception { + + Client client = ClientBuilder.newClient(); + WebTarget target = client.target(subscribeUrl); + try (final SseEventSource eventSource = SseEventSource.target(target) + .reconnectingEvery(5, TimeUnit.SECONDS) + .build()) { + eventSource.register(onEvent, onError, onComplete); + eventSource.open(); + System.out.println("Wainting for incoming event ..."); + + //Consuming events for one hour + Thread.sleep(60 * 60 * 1000); + } catch (InterruptedException e) { + e.printStackTrace(); + } + client.close(); + System.out.println("End"); + } + + // A new event is received + private static Consumer onEvent = (inboundSseEvent) -> { + String data = inboundSseEvent.readData(); + System.out.println(data); + }; + + //Error + private static Consumer onError = (throwable) -> { + throwable.printStackTrace(); + }; + + //Connection close and there is nothing to receive + private static Runnable onComplete = () -> { + System.out.println("Done!"); + }; + +} diff --git a/sse-jaxrs/sse-jaxrs-server/pom.xml b/sse-jaxrs/sse-jaxrs-server/pom.xml new file mode 100644 index 0000000000..1e89c70e13 --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-server/pom.xml @@ -0,0 +1,85 @@ + + + 4.0.0 + + + com.baeldung.sse + sse-jaxrs + 1.0-SNAPSHOT + + + sse-jaxrs-server + war + + + 2.4.2 + false + 18.0.0.2 + + + + ${artifactId} + + + net.wasdev.wlp.maven.plugins + liberty-maven-plugin + ${liberty-maven-plugin.version} + + + io.openliberty + openliberty-webProfile8 + ${openliberty-version} + zip + + project + true + src/main/liberty/config/server.xml + + + + install-server + prepare-package + + install-server + create-server + install-feature + + + + install-apps + package + + install-apps + + + + + + + + + + + javax.ws.rs + javax.ws.rs-api + 2.1 + provided + + + javax.enterprise + cdi-api + 2.0 + provided + + + javax.json.bind + javax.json.bind-api + 1.0 + provided + + + + + diff --git a/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/AppConfig.java b/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/AppConfig.java new file mode 100644 index 0000000000..058d19f045 --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/AppConfig.java @@ -0,0 +1,8 @@ +package com.baeldung.sse.jaxrs; + +import javax.ws.rs.ApplicationPath; +import javax.ws.rs.core.Application; + +@ApplicationPath("sse") +public class AppConfig extends Application { +} diff --git a/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/SseResource.java b/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/SseResource.java new file mode 100644 index 0000000000..1f60168a1b --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/SseResource.java @@ -0,0 +1,119 @@ +package com.baeldung.sse.jaxrs; + +import javax.enterprise.context.ApplicationScoped; +import javax.inject.Inject; +import javax.ws.rs.*; +import javax.ws.rs.core.Context; +import javax.ws.rs.core.HttpHeaders; +import javax.ws.rs.core.MediaType; +import javax.ws.rs.sse.OutboundSseEvent; +import javax.ws.rs.sse.Sse; +import javax.ws.rs.sse.SseBroadcaster; +import javax.ws.rs.sse.SseEventSink; + +@ApplicationScoped +@Path("stock") +public class SseResource { + + @Inject + private StockService stockService; + + private Sse sse; + private SseBroadcaster sseBroadcaster; + private OutboundSseEvent.Builder eventBuilder; + + @Context + public void setSse(Sse sse) { + this.sse = sse; + this.eventBuilder = sse.newEventBuilder(); + this.sseBroadcaster = sse.newBroadcaster(); + } + + @GET + @Path("prices") + @Produces("text/event-stream") + public void getStockPrices(@Context SseEventSink sseEventSink, + @HeaderParam(HttpHeaders.LAST_EVENT_ID_HEADER) @DefaultValue("-1") int lastReceivedId) { + + int lastEventId = 1; + if (lastReceivedId != -1) { + lastEventId = ++lastReceivedId; + } + boolean running = true; + while (running) { + Stock stock = stockService.getNextTransaction(lastEventId); + if (stock != null) { + OutboundSseEvent sseEvent = this.eventBuilder + .name("stock") + .id(String.valueOf(lastEventId)) + .mediaType(MediaType.APPLICATION_JSON_TYPE) + .data(Stock.class, stock) + .reconnectDelay(3000) + .comment("price change") + .build(); + sseEventSink.send(sseEvent); + lastEventId++; + } + //Simulate connection close + if (lastEventId % 5 == 0) { + sseEventSink.close(); + break; + } + + try { + //Wait 5 seconds + Thread.sleep(5 * 1000); + } catch (InterruptedException ex) { + // ... + } + //Simulatae a while boucle break + running = lastEventId <= 2000; + } + sseEventSink.close(); + } + + @GET + @Path("subscribe") + @Produces(MediaType.SERVER_SENT_EVENTS) + public void listen(@Context SseEventSink sseEventSink) { + sseEventSink.send(sse.newEvent("Welcome !")); + this.sseBroadcaster.register(sseEventSink); + sseEventSink.send(sse.newEvent("You are registred !")); + } + + @GET + @Path("publish") + public void broadcast() { + Runnable r = new Runnable() { + @Override + public void run() { + int lastEventId = 0; + boolean running = true; + while (running) { + lastEventId++; + Stock stock = stockService.getNextTransaction(lastEventId); + if (stock != null) { + OutboundSseEvent sseEvent = eventBuilder + .name("stock") + .id(String.valueOf(lastEventId)) + .mediaType(MediaType.APPLICATION_JSON_TYPE) + .data(Stock.class, stock) + .reconnectDelay(3000) + .comment("price change") + .build(); + sseBroadcaster.broadcast(sseEvent); + } + try { + //Wait 5 seconds + Thread.currentThread().sleep(5 * 1000); + } catch (InterruptedException ex) { + // ... + } + //Simulatae a while boucle break + running = lastEventId <= 2000; + } + } + }; + new Thread(r).start(); + } +} diff --git a/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/Stock.java b/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/Stock.java new file mode 100644 index 0000000000..a186b32771 --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/Stock.java @@ -0,0 +1,50 @@ +package com.baeldung.sse.jaxrs; + +import java.math.BigDecimal; +import java.time.LocalDateTime; + +public class Stock { + private Integer id; + private String name; + private BigDecimal price; + LocalDateTime dateTime; + + public Stock(Integer id, String name, BigDecimal price, LocalDateTime dateTime) { + this.id = id; + this.name = name; + this.price = price; + this.dateTime = dateTime; + } + + public Integer getId() { + return id; + } + + public void setId(Integer id) { + this.id = id; + } + + public String getName() { + return name; + } + + public void setName(String name) { + this.name = name; + } + + public BigDecimal getPrice() { + return price; + } + + public void setPrice(BigDecimal price) { + this.price = price; + } + + public LocalDateTime getDateTime() { + return dateTime; + } + + public void setDateTime(LocalDateTime dateTime) { + this.dateTime = dateTime; + } +} diff --git a/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/StockService.java b/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/StockService.java new file mode 100644 index 0000000000..15818ead5d --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/StockService.java @@ -0,0 +1,78 @@ +package com.baeldung.sse.jaxrs; + +import javax.enterprise.context.ApplicationScoped; +import javax.enterprise.context.Initialized; +import javax.enterprise.event.Event; +import javax.enterprise.event.Observes; +import javax.inject.Inject; +import javax.inject.Named; +import java.math.BigDecimal; +import java.math.RoundingMode; +import java.time.LocalDateTime; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; +import java.util.Random; +import java.util.concurrent.atomic.AtomicInteger; + +@ApplicationScoped +@Named +public class StockService { + + private static final BigDecimal UP = BigDecimal.valueOf(1.05f); + private static final BigDecimal DOWN = BigDecimal.valueOf(0.95f); + + List stockNames = Arrays.asList("GOOG", "IBM", "MS", "GOOG", "YAHO"); + List stocksDB = new ArrayList<>(); + private AtomicInteger counter = new AtomicInteger(0); + + public void init(@Observes @Initialized(ApplicationScoped.class) Object init) { + //Open price + System.out.println("@Start Init ..."); + stockNames.forEach(stockName -> { + stocksDB.add(new Stock(counter.incrementAndGet(), stockName, generateOpenPrice(), LocalDateTime.now())); + }); + + Runnable runnable = new Runnable() { + @Override + public void run() { + //Simulate Change price and put every x seconds + while (true) { + int indx = new Random().nextInt(stockNames.size()); + String stockName = stockNames.get(indx); + BigDecimal price = getLastPrice(stockName); + BigDecimal newprice = changePrice(price); + Stock stock = new Stock(counter.incrementAndGet(), stockName, newprice, LocalDateTime.now()); + stocksDB.add(stock); + + int r = new Random().nextInt(30); + try { + Thread.currentThread().sleep(r*1000); + } catch (InterruptedException ex) { + // ... + } + } + } + }; + new Thread(runnable).start(); + System.out.println("@End Init ..."); + } + + public Stock getNextTransaction(Integer lastEventId) { + return stocksDB.stream().filter(s -> s.getId().equals(lastEventId)).findFirst().orElse(null); + } + + BigDecimal generateOpenPrice() { + float min = 70; + float max = 120; + return BigDecimal.valueOf(min + new Random().nextFloat() * (max - min)).setScale(4,RoundingMode.CEILING); + } + + BigDecimal changePrice(BigDecimal price) { + return Math.random() >= 0.5 ? price.multiply(UP).setScale(4,RoundingMode.CEILING) : price.multiply(DOWN).setScale(4,RoundingMode.CEILING); + } + + private BigDecimal getLastPrice(String stockName) { + return stocksDB.stream().filter(stock -> stock.getName().equals(stockName)).findFirst().get().getPrice(); + } +} diff --git a/sse-jaxrs/sse-jaxrs-server/src/main/liberty/config/server.xml b/sse-jaxrs/sse-jaxrs-server/src/main/liberty/config/server.xml new file mode 100644 index 0000000000..9bf66d7795 --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-server/src/main/liberty/config/server.xml @@ -0,0 +1,7 @@ + + + jaxrs-2.1 + cdi-2.0 + + + diff --git a/sse-jaxrs/sse-jaxrs-server/src/main/resources/META-INF/beans.xml b/sse-jaxrs/sse-jaxrs-server/src/main/resources/META-INF/beans.xml new file mode 100644 index 0000000000..4f0b3cdeeb --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-server/src/main/resources/META-INF/beans.xml @@ -0,0 +1,6 @@ + + \ No newline at end of file diff --git a/sse-jaxrs/sse-jaxrs-server/src/main/webapp/WEB-INF/web.xml b/sse-jaxrs/sse-jaxrs-server/src/main/webapp/WEB-INF/web.xml new file mode 100644 index 0000000000..b4b8121fdd --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-server/src/main/webapp/WEB-INF/web.xml @@ -0,0 +1,11 @@ + + + Hello Servlet + + + index.html + + + diff --git a/sse-jaxrs/sse-jaxrs-server/src/main/webapp/index.html b/sse-jaxrs/sse-jaxrs-server/src/main/webapp/index.html new file mode 100644 index 0000000000..9015a7a32c --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-server/src/main/webapp/index.html @@ -0,0 +1 @@ +index diff --git a/sse-jaxrs/sse-jaxrs-server/src/main/webapp/sse-broadcast.html b/sse-jaxrs/sse-jaxrs-server/src/main/webapp/sse-broadcast.html new file mode 100644 index 0000000000..5a46e2a5d3 --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-server/src/main/webapp/sse-broadcast.html @@ -0,0 +1,38 @@ + + + + Server-Sent Event Broadcasting + + +

Stock prices :

+
+
    +
+
+ + + \ No newline at end of file diff --git a/sse-jaxrs/sse-jaxrs-server/src/main/webapp/sse.html b/sse-jaxrs/sse-jaxrs-server/src/main/webapp/sse.html new file mode 100644 index 0000000000..8fddae4717 --- /dev/null +++ b/sse-jaxrs/sse-jaxrs-server/src/main/webapp/sse.html @@ -0,0 +1,38 @@ + + + + Server-Sent Event + + +

Stock prices :

+
+
    +
+
+ + + \ No newline at end of file