[ISSUE #4021] Replace LinkedList by ArrayList (#4233)

* replace LinkedList by ArrayList

* update import order

Author: VL-037

eventmesh-common/src/main/java/org/apache/eventmesh/common/protocol/tcp/Subscription.java

@@ -19,12 +19,12 @@
 
 import org.apache.eventmesh.common.protocol.SubscriptionItem;
 
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 
 public class Subscription {
 
-    private List<SubscriptionItem> topicList = new LinkedList<>();
+    private List<SubscriptionItem> topicList = new ArrayList<>();
 
     public Subscription() {
     }

eventmesh-runtime/src/main/java/org/apache/eventmesh/runtime/boot/EventMeshGrpcServer.java

@@ -41,8 +41,8 @@
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClients;
 
+import java.util.ArrayList;
 import java.util.Iterator;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Optional;
 import java.util.concurrent.BlockingQueue;
@@ -276,7 +276,7 @@ private void initThreadPool() {
     }
 
     private void initHttpClientPool() {
-        httpClientPool = new LinkedList<>();
+        httpClientPool = new ArrayList<>();
         int clientPool = RandomUtils.nextInt(MIN_LIMIT, MAX_LIMIT);
         for (int i = 0; i < clientPool; i++) {
             CloseableHttpClient client = HttpClients.createDefault();

eventmesh-runtime/src/main/java/org/apache/eventmesh/runtime/core/protocol/grpc/consumer/ConsumerManager.java

@@ -32,7 +32,6 @@
 import java.util.Date;
 import java.util.HashSet;
 import java.util.Iterator;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -210,7 +209,7 @@ private void startClientCheck() {
                     log.debug("grpc client info check");
                 }
 
-                final List<ConsumerGroupClient> clientList = new LinkedList<>();
+                final List<ConsumerGroupClient> clientList = new ArrayList<>();
                 clientTable.values().forEach(clients -> {
                     clientList.addAll(clients);
                 });

eventmesh-sdks/eventmesh-sdk-java/src/main/java/org/apache/eventmesh/client/tcp/impl/cloudevent/CloudEventTCPSubClient.java

@@ -35,8 +35,8 @@
 import org.apache.commons.collections4.CollectionUtils;
 
 import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -56,7 +56,7 @@
 @Slf4j
 class CloudEventTCPSubClient extends TcpClient implements EventMeshTCPSubClient<CloudEvent> {
 
-    private final List<SubscriptionItem> subscriptionItems = Collections.synchronizedList(new LinkedList<>());
+    private final List<SubscriptionItem> subscriptionItems = Collections.synchronizedList(new ArrayList<>());
     private ReceiveMsgHook<CloudEvent> callback;
 
     public CloudEventTCPSubClient(EventMeshTCPClientConfig eventMeshTcpClientConfig) {

eventmesh-sdks/eventmesh-sdk-java/src/main/java/org/apache/eventmesh/client/tcp/impl/eventmeshmessage/EventMeshMessageTCPSubClient.java

@@ -36,8 +36,8 @@
 
 import org.apache.commons.collections4.CollectionUtils;
 
+import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -48,7 +48,7 @@
 @Slf4j
 class EventMeshMessageTCPSubClient extends TcpClient implements EventMeshTCPSubClient<EventMeshMessage> {
 
-    private final List<SubscriptionItem> subscriptionItems = Collections.synchronizedList(new LinkedList<>());
+    private final List<SubscriptionItem> subscriptionItems = Collections.synchronizedList(new ArrayList<>());
     private ReceiveMsgHook<EventMeshMessage> callback;
 
     public EventMeshMessageTCPSubClient(EventMeshTCPClientConfig eventMeshTcpClientConfig) {