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authorGravatar Vitaly Takmazov2017-11-02 16:02:17 +0300
committerGravatar Vitaly Takmazov2017-11-02 16:12:40 +0300
commitee20020d9c576a48173c13b68b03d349c0ec3e47 (patch)
tree7c59dcac74cde4e5b819a245dc0fbbb315020f10 /juick-server-web/src/main/java/com/juick
parent61c6a3fe338a5cbbef55081f8ac26011c053125d (diff)
server-web: base websocket component with autoreconnect
Diffstat (limited to 'juick-server-web/src/main/java/com/juick')
-rw-r--r--juick-server-web/src/main/java/com/juick/server/component/JuickServerComponent.java56
-rw-r--r--juick-server-web/src/main/java/com/juick/server/component/JuickServerReconnectManager.java22
-rw-r--r--juick-server-web/src/main/java/com/juick/server/component/MessageEvent.java21
-rw-r--r--juick-server-web/src/main/java/com/juick/server/configuration/JuickServerComponentConfiguration.java30
4 files changed, 129 insertions, 0 deletions
diff --git a/juick-server-web/src/main/java/com/juick/server/component/JuickServerComponent.java b/juick-server-web/src/main/java/com/juick/server/component/JuickServerComponent.java
new file mode 100644
index 00000000..96b8c398
--- /dev/null
+++ b/juick-server-web/src/main/java/com/juick/server/component/JuickServerComponent.java
@@ -0,0 +1,56 @@
+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.inject.Inject;
+import java.io.IOException;
+
+public class JuickServerComponent extends TextWebSocketHandler {
+ private static Logger logger = LoggerFactory.getLogger(JuickServerComponent.class);
+ @Inject
+ private ApplicationEventPublisher applicationEventPublisher;
+ @Inject
+ private ObjectMapper jsonMapper;
+
+ private WebSocketSession session;
+
+ @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));
+ 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 {
+ applicationEventPublisher.publishEvent(new DisconnectedEvent(this));
+ }
+ }
+}
diff --git a/juick-server-web/src/main/java/com/juick/server/component/JuickServerReconnectManager.java b/juick-server-web/src/main/java/com/juick/server/component/JuickServerReconnectManager.java
new file mode 100644
index 00000000..a662e4fb
--- /dev/null
+++ b/juick-server-web/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-server-web/src/main/java/com/juick/server/component/MessageEvent.java b/juick-server-web/src/main/java/com/juick/server/component/MessageEvent.java
new file mode 100644
index 00000000..59537a79
--- /dev/null
+++ b/juick-server-web/src/main/java/com/juick/server/component/MessageEvent.java
@@ -0,0 +1,21 @@
+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})
+ */
+ public MessageEvent(Object source, Message message) {
+ super(source);
+ this.message = message;
+ }
+
+ public Message getMessage() {
+ return message;
+ }
+}
diff --git a/juick-server-web/src/main/java/com/juick/server/configuration/JuickServerComponentConfiguration.java b/juick-server-web/src/main/java/com/juick/server/configuration/JuickServerComponentConfiguration.java
new file mode 100644
index 00000000..7ddda36e
--- /dev/null
+++ b/juick-server-web/src/main/java/com/juick/server/configuration/JuickServerComponentConfiguration.java
@@ -0,0 +1,30 @@
+package com.juick.server.configuration;
+
+import com.juick.server.component.JuickServerComponent;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableScheduling;
+import org.springframework.web.socket.client.WebSocketConnectionManager;
+import org.springframework.web.socket.client.standard.StandardWebSocketClient;
+
+import javax.inject.Inject;
+
+@Configuration
+@EnableScheduling
+public class JuickServerComponentConfiguration {
+ @Value("${websocket_url:ws://localhost:8080/ws/}")
+ private String WS_URI;
+ @Inject
+ private JuickServerComponent juickServerComponent;
+ @Bean
+ public WebSocketConnectionManager connectionManager() {
+ WebSocketConnectionManager manager = new WebSocketConnectionManager(client(), juickServerComponent, WS_URI);
+ manager.setAutoStartup(true);
+ return manager;
+ }
+ @Bean
+ public StandardWebSocketClient client() {
+ return new StandardWebSocketClient();
+ }
+}