5 files changed, 152 insertions, 0 deletions
diff --git a/juick-common/src/main/java/com/juick/server/component/DisconnectedEvent.java b/juick-common/src/main/java/com/juick/server/component/DisconnectedEvent.java
new file mode 100644
index 00000000..9da6d7a9
--- /dev/null
+++ b/juick-common/src/main/java/com/juick/server/component/DisconnectedEvent.java
@@ -0,0 +1,14 @@
+package com.juick.server.component;
+
+import org.springframework.context.ApplicationEvent;
+
+public class DisconnectedEvent extends ApplicationEvent {
+    /**
+     * Create a new ApplicationEvent.
+     *
+     * @param source the object on which the event initially occurred (never {@code null})
+     */
+    public DisconnectedEvent(Object source) {
+        super(source);
+    }
+}
diff --git a/juick-common/src/main/java/com/juick/server/component/JuickServerComponent.java b/juick-common/src/main/java/com/juick/server/component/JuickServerComponent.java
new file mode 100644
index 00000000..792f446f
--- /dev/null
+++ b/juick-common/src/main/java/com/juick/server/component/JuickServerComponent.java
@@ -0,0 +1,71 @@
+package com.juick.server.component;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.ApplicationEventPublisher;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.web.socket.CloseStatus;
+import org.springframework.web.socket.PingMessage;
+import org.springframework.web.socket.TextMessage;
+import org.springframework.web.socket.WebSocketSession;
+import org.springframework.web.socket.handler.TextWebSocketHandler;
+
+import javax.annotation.PostConstruct;
+import javax.annotation.PreDestroy;
+import javax.inject.Inject;
+import java.io.IOException;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+public class JuickServerComponent extends TextWebSocketHandler {
+    private static Logger logger = LoggerFactory.getLogger(JuickServerComponent.class);
+    @Inject
+    private ApplicationEventPublisher applicationEventPublisher;
+    @Inject
+    private ObjectMapper jsonMapper;
+
+    private WebSocketSession session;
+    private final AtomicBoolean closeFlag = new AtomicBoolean(false);
+
+    @PostConstruct
+    public void init() {
+        closeFlag.set(false);
+    }
+    @Override
+    public void afterConnectionEstablished(WebSocketSession session) throws Exception {
+        logger.info("WebSocket connected");
+        this.session = session;
+    }
+
+    @Override
+    public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
+        logger.info("WebSocket disconnected with code {}: {}", status.getCode(), status.getReason());
+        applicationEventPublisher.publishEvent(new DisconnectedEvent(this));
+    }
+
+    @Override
+    protected void handleTextMessage(WebSocketSession session, TextMessage text) throws Exception {
+        com.juick.Message jmsg = jsonMapper.readValue(text.asBytes(), com.juick.Message.class);
+
+        if (logger.isInfoEnabled()) // prevent writeValueAsString execution if logger disabled
+            logger.info("got jmsg: {}", jsonMapper.writeValueAsString(jmsg));
+        if (!closeFlag.get()) {
+            applicationEventPublisher.publishEvent(new MessageEvent(this, jmsg));
+        }
+    }
+
+    @Scheduled(fixedRate = 30000, initialDelay = 30000)
+    public void ping() throws IOException {
+        if (session != null && session.isOpen()) {
+            logger.debug("Sending WebSocket ping");
+            session.sendMessage(new PingMessage());
+        } else if (!closeFlag.get()) {
+            applicationEventPublisher.publishEvent(new DisconnectedEvent(this));
+        }
+    }
+    @PreDestroy
+    public void close() {
+        closeFlag.set(true);
+    }
+
+}
diff --git a/juick-common/src/main/java/com/juick/server/component/JuickServerReconnectManager.java b/juick-common/src/main/java/com/juick/server/component/JuickServerReconnectManager.java
new file mode 100644
index 00000000..a662e4fb
--- /dev/null
+++ b/juick-common/src/main/java/com/juick/server/component/JuickServerReconnectManager.java
@@ -0,0 +1,22 @@
+package com.juick.server.component;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.ApplicationListener;
+import org.springframework.stereotype.Component;
+import org.springframework.web.socket.client.WebSocketConnectionManager;
+
+import javax.inject.Inject;
+
+@Component
+public class JuickServerReconnectManager implements ApplicationListener<DisconnectedEvent> {
+    private static Logger logger = LoggerFactory.getLogger(JuickServerReconnectManager.class);
+    @Inject
+    private WebSocketConnectionManager webSocketConnectionManager;
+    @Override
+    public void onApplicationEvent(DisconnectedEvent event) {
+        logger.info("retrying...");
+        webSocketConnectionManager.stop();
+        webSocketConnectionManager.start();
+    }
+}
diff --git a/juick-common/src/main/java/com/juick/server/component/MessageEvent.java b/juick-common/src/main/java/com/juick/server/component/MessageEvent.java
new file mode 100644
index 00000000..048de6a6
--- /dev/null
+++ b/juick-common/src/main/java/com/juick/server/component/MessageEvent.java
@@ -0,0 +1,22 @@
+package com.juick.server.component;
+
+import com.juick.Message;
+import org.springframework.context.ApplicationEvent;
+
+public class MessageEvent extends ApplicationEvent {
+    private Message message;
+    /**
+     * Create a new ApplicationEvent.
+     *
+     * @param source the object on which the event initially occurred (never {@code null})
+     * @param message app message
+     */
+    public MessageEvent(Object source, Message message) {
+        super(source);
+        this.message = message;
+    }
+
+    public Message getMessage() {
+        return message;
+    }
+}
diff --git a/juick-common/src/main/java/com/juick/server/component/UserUpdatedEvent.java b/juick-common/src/main/java/com/juick/server/component/UserUpdatedEvent.java
new file mode 100644
index 00000000..059aeefd
--- /dev/null
+++ b/juick-common/src/main/java/com/juick/server/component/UserUpdatedEvent.java
@@ -0,0 +1,23 @@
+package com.juick.server.component;
+
+import com.juick.User;
+import org.springframework.context.ApplicationEvent;
+import org.springframework.lang.NonNull;
+
+public class UserUpdatedEvent extends ApplicationEvent {
+    private User user;
+    /**
+     * Generated when user is updated (avatar changed, etc).
+     *
+     * @param source the object on which the event initially occurred (never {@code null})
+     * @param user updated user
+     */
+    public UserUpdatedEvent(@NonNull Object source, User user) {
+        super(source);
+        this.user = user;
+    }
+
+    public User getUser() {
+        return user;
+    }
+}