feature:Support_reconnect_backoff_interface

cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/ClientBuilder.java

@@ -4,6 +4,8 @@
 import com.crossoverjie.cim.client.sdk.io.MessageListener;
 import com.crossoverjie.cim.client.sdk.io.ReconnectCheck;
 import java.util.concurrent.ThreadPoolExecutor;
+
+import com.crossoverjie.cim.client.sdk.io.backoff.BackoffStrategy;
 import okhttp3.OkHttpClient;
 
 /**
@@ -20,4 +22,5 @@ public interface ClientBuilder {
     ClientBuilder okHttpClient(OkHttpClient okHttpClient);
     ClientBuilder messageListener(MessageListener messageListener);
     ClientBuilder callbackThreadPool(ThreadPoolExecutor callbackThreadPool);
+    ClientBuilder backoffStrategy(String backoffStrategy);
 }

cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/impl/ClientBuilderImpl.java

@@ -5,12 +5,20 @@
 import com.crossoverjie.cim.client.sdk.Event;
 import com.crossoverjie.cim.client.sdk.io.MessageListener;
 import com.crossoverjie.cim.client.sdk.io.ReconnectCheck;
+import com.crossoverjie.cim.client.sdk.io.backoff.BackoffStrategy;
+import com.crossoverjie.cim.client.sdk.io.backoff.RandomBackoff;
 import com.crossoverjie.cim.common.util.StringUtil;
+
+import java.lang.reflect.Constructor;
+import java.util.ServiceLoader;
 import java.util.concurrent.ThreadPoolExecutor;
 import okhttp3.OkHttpClient;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class ClientBuilderImpl implements ClientBuilder {
 
+    private Logger logger = LoggerFactory.getLogger(ClientBuilderImpl.class);
 
     private ClientConfigurationData conf;
 
@@ -79,4 +87,17 @@
         this.conf.setCallbackThreadPool(callbackThreadPool);
         return this;
     }
+
+    @Override
+    public ClientBuilder backoffStrategy(String backoffStrategy) {
+        Class<?> clazz = null;
+        try {
+            clazz = Class.forName(backoffStrategy);
+            Constructor<?> constructor = clazz.getDeclaredConstructor();
+            this.conf.setBackoffStrategy((BackoffStrategy) constructor.newInstance());
+        } catch (Exception e) {
+            logger.error("error loader backoffStrategy, using default RandomBackoff", e);
+        }
+        return this;
+    }
 }

cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/impl/ClientConfigurationData.java

@@ -1,7 +1,9 @@
 package com.crossoverjie.cim.client.sdk.impl;
 
 import com.crossoverjie.cim.client.sdk.Event;
+import com.crossoverjie.cim.client.sdk.io.backoff.BackoffStrategy;
 import com.crossoverjie.cim.client.sdk.io.MessageListener;
+import com.crossoverjie.cim.client.sdk.io.backoff.RandomBackoff;
 import com.crossoverjie.cim.client.sdk.io.ReconnectCheck;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
@@ -46,4 +48,7 @@ public static class Auth{
 
     @JsonIgnore
     private ReconnectCheck reconnectCheck = (client) -> true;
+
+    @JsonIgnore
+    private BackoffStrategy backoffStrategy = new RandomBackoff();
 }

cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/impl/ClientImpl.java

@@ -202,9 +202,7 @@ public void reconnect() throws Exception {
 
         this.conf.getEvent().info("cim trigger reconnecting....");
 
-        // TODO: 2024/9/13 need a backoff interface
-        int random = (int) (Math.random() * 7 + 3);
-        TimeUnit.SECONDS.sleep(random);
+        this.conf.getBackoffStrategy().runBackoff();
 
         // don't set State ready, because when connect success, the State will be set to ready automate.
         connectServer(v -> {

cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/io/backoff/BackoffStrategy.java

@@ -0,0 +1,24 @@
+package com.crossoverjie.cim.client.sdk.io.backoff;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * @author:qjj
+ * @create: 2024-09-21 12:16
+ * @Description: backoff strategy interface
+ */
+
+public interface BackoffStrategy {
+    /**
+     * @return the backoff time in milliseconds
+     */
+    long nextBackoff();
+
+    /**
+     * Run the backoff strategy
+     * @throws InterruptedException
+     */
+    default void runBackoff() throws InterruptedException {
+        TimeUnit.SECONDS.sleep(nextBackoff());
+    }
+}

cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/io/backoff/RandomBackoff.java

@@ -0,0 +1,19 @@
+package com.crossoverjie.cim.client.sdk.io.backoff;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * @author:qjj
+ * @create: 2024-09-21 12:22
+ * @Description: random backoff strategy
+ */
+
+public class RandomBackoff implements BackoffStrategy {
+
+    @Override
+    public long nextBackoff() {
+        int random = (int) (Math.random() * 7 + 3);
+        return random;
+    }
+
+}

cim-client-sdk/src/test/java/com/crossoverjie/cim/client/sdk/ClientTest.java

@@ -224,11 +224,13 @@ public void testReconnect() throws Exception {
                 .userName(zs)
                 .userId(zsId)
                 .build();
+        var backoffStrategy = "com.crossoverjie.cim.client.sdk.io.backoff.RandomBackoff";
 
         @Cleanup
         Client client1 = Client.builder()
                 .auth(auth1)
                 .routeUrl(routeUrl)
+                .backoffStrategy(backoffStrategy)
                 .build();
         TimeUnit.SECONDS.sleep(3);
         ClientState.State state = client1.getState();
@@ -242,6 +244,7 @@ public void testReconnect() throws Exception {
                 .auth(auth2)
                 .routeUrl(routeUrl)
                 .messageListener((client, message) -> client2Receive.set(message))
+                .backoffStrategy(backoffStrategy)
                 .build();
         TimeUnit.SECONDS.sleep(3);
         ClientState.State state2 = client2.getState();

cim-client/src/main/java/com/crossoverjie/cim/client/config/AppConfiguration.java

@@ -29,6 +29,8 @@ public class AppConfiguration {
 
     @Value("${cim.reconnect.count}")
     private int reconnectCount;
+    @Value("${cim.reconnect.backoff.strategy}")
+    private String backoffStrategy;
 
     @Value("${cim.route.url}")
     private String routeUrl;

cim-client/src/main/java/com/crossoverjie/cim/client/config/BeanConfig.java

@@ -3,6 +3,7 @@
 import com.crossoverjie.cim.client.sdk.Client;
 import com.crossoverjie.cim.client.sdk.Event;
 import com.crossoverjie.cim.client.sdk.impl.ClientConfigurationData;
+import com.crossoverjie.cim.client.sdk.io.backoff.RandomBackoff;
 import com.crossoverjie.cim.client.service.MsgLogger;
 import com.crossoverjie.cim.client.service.ShutDownSign;
 import com.crossoverjie.cim.client.service.impl.MsgCallBackListener;
@@ -61,6 +62,7 @@ public Client buildClient(@Qualifier("callBackThreadPool") ThreadPoolExecutor ca
                 .okHttpClient(okHttpClient)
                 .messageListener(new MsgCallBackListener(msgLogger))
                 .callbackThreadPool(callbackThreadPool)
+                .backoffStrategy(appConfiguration.getBackoffStrategy())
                 .build();
     }
 

cim-client/src/main/resources/application.yaml

@@ -1,37 +1,39 @@
-spring:
-  application:
-    name: cim-client
-
-# web port
-server:
-  port: 8082
-
-logging:
-  level:
-    root: error
-
-# enable swagger
-springdoc:
-  swagger-ui:
-    enabled: true
-
-# log path
-cim:
-  msg:
-    logger:
-      path: /opt/logs/cim/
-  route:
-    url: http://localhost:8083 # route url suggested that this is Nginx address
-  user: # cim userId and userName
-    id: 1725714450795
-    userName: cj4
-  callback:
-    thread:
-      queue:
-        size: 2
-      pool:
-        size: 2
-  heartbeat:
-    time: 60 # cim heartbeat time (seconds)
-  reconnect:
-    count: 3
+spring:
+  application:
+    name: cim-client
+
+# web port
+server:
+  port: 8082
+
+logging:
+  level:
+    root: error
+
+# enable swagger
+springdoc:
+  swagger-ui:
+    enabled: true
+
+# log path
+cim:
+  msg:
+    logger:
+      path: /opt/logs/cim/
+  route:
+    url: http://localhost:8083 # route url suggested that this is Nginx address
+  user: # cim userId and userName
+    id: 1725714450795
+    userName: cj4
+  callback:
+    thread:
+      queue:
+        size: 2
+      pool:
+        size: 2
+  heartbeat:
+    time: 60 # cim heartbeat time (seconds)
+  reconnect:
+    count: 3
+    backoff:
+      strategy: com.crossoverjie.cim.client.sdk.io.backoff.RandomBackoff

cim-client/src/test/resources/application.yaml

@@ -37,4 +37,6 @@ cim:
   heartbeat:
     time: 60 # cim heartbeat time (seconds)
   reconnect:
-    count: 3
+    count: 3
+    backoff:
+      strategy: com.crossoverjie.cim.client.sdk.io.backoff.RandomBackoff