feature: init namingserver client

all/pom.xml

@@ -146,6 +146,11 @@
             <artifactId>seata-discovery-etcd3</artifactId>
             <version>${project.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.seata</groupId>
+            <artifactId>seata-discovery-namingserver</artifactId>
+            <version>${project.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.apache.seata</groupId>
             <artifactId>seata-brpc</artifactId>

bom/pom.xml

@@ -126,6 +126,11 @@
                 <artifactId>seata-discovery-zk</artifactId>
                 <version>${project.version}</version>
             </dependency>
+            <dependency>
+                <groupId>org.apache.seata</groupId>
+                <artifactId>seata-discovery-namingserver</artifactId>
+                <version>${project.version}</version>
+            </dependency>
             <dependency>
                 <groupId>org.apache.seata</groupId>
                 <artifactId>seata-discovery-redis</artifactId>

changes/en-us/2.x.md

@@ -3,6 +3,7 @@ Add changes here for all PR submitted to the 2.x branch.
 <!-- Please add the `changes` to the following location(feature/bugfix/optimize/test) based on the type of PR -->
 
 ### feature:
+- [[#6536](https://github.com/apache/incubator-seata/pull/6536)] support naming server client
 - [[#6226](https://github.com/apache/incubator-seata/pull/6226)] multi-version seata protocol support
 - [[#6537](https://github.com/apache/incubator-seata/pull/6537)] support Namingserver
 - [[#6538](https://github.com/apache/incubator-seata/pull/6538)] Integration of naming server on the Seata server side

changes/zh-cn/2.x.md

@@ -3,6 +3,7 @@
 <!-- 请根据PR的类型添加 `变更记录` 到以下对应位置(feature/bugfix/optimize/test) 下 -->
 
 ### feature:
+- [[#6536](https://github.com/apache/incubator-seata/pull/6536)] 支持 naming server客户端
 - [[#6226](https://github.com/apache/incubator-seata/pull/6226)] 支持seata私有协议多版本兼容
 - [[#6537](https://github.com/apache/incubator-seata/pull/6537)] 支持 Namingserver
 - [[#6538](https://github.com/apache/incubator-seata/pull/6538)] seata server端集成naming server

common/src/main/java/org/apache/seata/common/XID.java

@@ -18,6 +18,7 @@
 
 import static org.apache.seata.common.Constants.IP_PORT_SPLIT_CHAR;
 
+
 /**
  * The type Xid.
  *

common/src/main/java/org/apache/seata/common/metadata/Node.java

@@ -18,6 +18,7 @@
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Objects;
 
 
 public class Node {
@@ -28,6 +29,10 @@ public class Node {
 
     private Endpoint internal;
 
+    private double weight = 1.0;
+    private boolean healthy = true;
+    private long timeStamp;
+
     private String group;
     private ClusterRole role = ClusterRole.MEMBER;
 
@@ -97,6 +102,49 @@ public void setInternal(Endpoint internal) {
         this.internal = internal;
     }
 
+    @Override
+    public int hashCode() {
+        return Objects.hash(control, transaction);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        Node node = (Node) o;
+        return Objects.equals(control, node.control) && Objects.equals(transaction, node.transaction);
+    }
+
+
+    // convert to String
+    public String toJsonString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("{");
+        sb.append("\"controlEndpoint\": ").append(control.toString()).append(", ");
+        sb.append("\"transactionEndpoint\": ").append(transaction.toString()).append(", ");
+        sb.append("\"weight\": ").append(weight).append(", ");
+        sb.append("\"healthy\": ").append(healthy).append(", ");
+        sb.append("\"timeStamp\": ").append(timeStamp).append(", ");
+        sb.append("\"metadata\": {");
+
+        // handle metadata k-v map
+        int i = 0;
+        for (Map.Entry<String, Object> entry : metadata.entrySet()) {
+            if (i > 0) {
+                sb.append(", ");
+            }
+            sb.append("\"").append(entry.getKey()).append("\": \"").append(entry.getValue()).append("\"");
+            i++;
+        }
+
+        sb.append("}}");
+        return sb.toString();
+    }
+
     public static class Endpoint {
 
         private String host;
@@ -136,6 +184,25 @@ public String createAddress() {
             return host + ":" + port;
         }
 
+        @Override
+        public int hashCode() {
+            return Objects.hash(host,port,protocol);
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+            if (o == null || getClass() != o.getClass()) {
+                return false;
+            }
+            Endpoint endpoint = (Endpoint) o;
+            return Objects.equals(endpoint.host,this.host)
+                    && Objects.equals(endpoint.port,this.port)
+                    && Objects.equals(endpoint.protocol,this.protocol);
+        }
+
         @Override
         public String toString() {
             return "Endpoint{" + "host='" + host + '\'' + ", port=" + port + '}';

common/src/main/java/org/apache/seata/common/metadata/namingserver/Instance.java

@@ -34,11 +34,12 @@ public class Instance {
     private String namespace;
     private String clusterName;
     private String unit;
-    private Node.Endpoint controlEndpoint = new Node.Endpoint();
-    private Node.Endpoint transactionEndpoint = new Node.Endpoint();
+    private Node.Endpoint control = new Node.Endpoint();
+    private Node.Endpoint transaction = new Node.Endpoint();
     private double weight = 1.0;
     private boolean healthy = true;
     private long term;
+    private long timestamp;
     private ClusterRole role = ClusterRole.MEMBER;
     private Map<String, Object> metadata = new HashMap<>();
 
@@ -83,20 +84,20 @@ public void setRole(ClusterRole role) {
         this.role = role;
     }
 
-    public Node.Endpoint getControlEndpoint() {
-        return controlEndpoint;
+    public Node.Endpoint getControl() {
+        return control;
     }
 
-    public void setControlEndpoint(Node.Endpoint controlEndpoint) {
-        this.controlEndpoint = controlEndpoint;
+    public void setControl(Node.Endpoint control) {
+        this.control = control;
     }
 
-    public Node.Endpoint getTransactionEndpoint() {
-        return transactionEndpoint;
+    public Node.Endpoint getTransaction() {
+        return transaction;
     }
 
-    public void setTransactionEndpoint(Node.Endpoint transactionEndpoint) {
-        this.transactionEndpoint = transactionEndpoint;
+    public void setTransaction(Node.Endpoint transaction) {
+        this.transaction = transaction;
     }
 
     public double getWeight() {
@@ -124,6 +125,14 @@ public void setTerm(long term) {
         this.term = term;
     }
 
+    public long getTimestamp() {
+        return timestamp;
+    }
+
+    public void setTimestamp(long timestamp) {
+        this.timestamp = timestamp;
+    }
+
     public void addMetadata(String key, Object value) {
         this.metadata.put(key, value);
     }
@@ -134,7 +143,7 @@ public void setMetadata(Map<String, Object> metadata) {
 
     @Override
     public int hashCode() {
-        return Objects.hash(controlEndpoint, transactionEndpoint);
+        return Objects.hash(control, transaction);
     }
 
     @Override
@@ -146,7 +155,7 @@ public boolean equals(Object o) {
             return false;
         }
         Instance instance = (Instance) o;
-        return Objects.equals(controlEndpoint, instance.controlEndpoint) && Objects.equals(transactionEndpoint, instance.transactionEndpoint);
+        return Objects.equals(control, instance.control) && Objects.equals(transaction, instance.transaction);
     }
 
 
@@ -168,11 +177,12 @@ public Map<String, String> toMap() {
         resultMap.put("namespace", namespace);
         resultMap.put("clusterName", clusterName);
         resultMap.put("unit", unit);
-        resultMap.put("controlEndpoint", controlEndpoint.toString());
-        resultMap.put("transactionEndpoint", transactionEndpoint.toString());
+        resultMap.put("control", control.toString());
+        resultMap.put("transaction", transaction.toString());
         resultMap.put("weight", String.valueOf(weight));
         resultMap.put("healthy", String.valueOf(healthy));
         resultMap.put("term", String.valueOf(term));
+        resultMap.put("timestamp",String.valueOf(timestamp));
         resultMap.put("metadata", mapToJsonString(metadata));
 
         return resultMap;

common/src/main/java/org/apache/seata/common/metadata/namingserver/NamingServerNode.java

@@ -28,6 +28,26 @@ public class NamingServerNode extends Node {
     private boolean healthy = true;
     private long term;
 
+    public double getWeight() {
+        return weight;
+    }
+
+    public boolean isHealthy() {
+        return healthy;
+    }
+
+    public void setHealthy(boolean healthy) {
+        this.healthy = healthy;
+    }
+
+    public long getTerm() {
+        return term;
+    }
+
+    public void setTerm(long term) {
+        this.term = term;
+    }
+
     @Override
     public int hashCode() {
         return Objects.hash(getControl(), getTransaction());
@@ -45,25 +65,15 @@ public boolean equals(Object o) {
         return Objects.equals(getControl(), node.getControl()) && Objects.equals(getTransaction(), node.getTransaction());
     }
 
-    public boolean isTotalEqual(Object obj) {
-        if (this == obj) {
-            return true;
-        }
 
-        if (obj == null || getClass() != obj.getClass()) {
+    public boolean isChanged(Object obj) {
+        if (Objects.isNull(obj)) {
             return false;
         }
-
         NamingServerNode otherNode = (NamingServerNode) obj;
 
-        // check each member variable
-        return Objects.equals(getControl(), otherNode.getControl()) &&
-                Objects.equals(getTransaction(), otherNode.getTransaction()) &&
-                Double.compare(otherNode.weight, weight) == 0 &&
-                healthy == otherNode.healthy &&
-                Objects.equals(getRole(), otherNode.getRole()) &&
-                term == otherNode.term &&
-                Objects.equals(getMetadata(), otherNode.getMetadata());
+        // other node is newer than me
+        return otherNode.term > term;
     }
 
     // convert to String

common/src/main/java/org/apache/seata/common/metadata/namingserver/Unit.java

@@ -24,7 +24,7 @@ public class Unit {
 
     private String unitName;
 
-    private List<Node> nodeList;
+    private List<NamingServerNode> nodeList;
 
     public String getUnitName() {
         return unitName;
@@ -34,11 +34,11 @@ public void setUnitName(String unitName) {
         this.unitName = unitName;
     }
 
-    public List<Node> getNamingInstanceList() {
+    public List<NamingServerNode> getNamingInstanceList() {
         return nodeList;
     }
 
-    public void setNamingInstanceList(List<Node> nodeList) {
+    public void setNamingInstanceList(List<NamingServerNode> nodeList) {
         this.nodeList = nodeList;
     }
 
@@ -51,16 +51,17 @@ public void removeInstance(Node node) {
     /**
      * @param node node
      */
-    public void addInstance(NamingServerNode node) {
+    public boolean addInstance(NamingServerNode node) {
         if (nodeList.contains(node)) {
-            Node node1 = nodeList.get(nodeList.indexOf(node));
-            if (node.isTotalEqual(node1)) {
-                return;
-            } else {
+            NamingServerNode node1 = nodeList.get(nodeList.indexOf(node));
+            if (node1.isChanged(node)) {
                 nodeList.remove(node1);
+            } else {
+                return false;
             }
         }
         nodeList.add(node);
+        return true;
 
     }