feat: add grpc plugin and Implemented code generation for gRPC services.

ci/spotbugs/exclude.xml

@@ -42,4 +42,8 @@
         <Bug pattern="URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD"/>
     </Match>
 
+    <!-- Exclude gRPC auto-generated classes -->
+    <Match>
+        <Package name="io.opengemini.client.proto"/>
+    </Match>
 </FindBugsFilter>

opengemini-client/src/main/proto/write.proto

@@ -0,0 +1,61 @@
+syntax = "proto3";
+package proto;
+option java_multiple_files = true;
+option java_package = "io.opengemini.client.proto";
+option java_outer_classname = "WriteProto";
+
+// WriteService represents a openGemini RPC write service.
+service WriteService {
+  // Write writes the given records to the specified database and retention policy.
+  rpc Write (WriteRequest) returns (WriteResponse) {}
+  // Ping is used to check if the server is alive
+  rpc Ping(PingRequest) returns (PingResponse) {}
+}
+
+message WriteRequest {
+  uint32 version = 1;
+  string database = 2;
+  string retention_policy = 3;
+  string username = 4;
+  string password = 5;
+  repeated Record records = 6;
+}
+
+message WriteResponse {
+  ResponseCode code = 1;
+}
+
+message Record {
+  string measurement = 1;
+  int64 min_time = 2;
+  int64 max_time = 3;
+  CompressMethod compress_method = 4;
+  bytes block = 5;
+}
+
+enum CompressMethod {
+  UNCOMPRESSED = 0;
+  LZ4_FAST = 1;
+  ZSTD_FAST = 2;
+  SNAPPY = 3;
+}
+
+enum ResponseCode {
+  Success = 0;
+  Partial = 1;
+  Failed = 2;
+}
+
+message PingRequest {
+  string client_id = 1;
+}
+
+enum ServerStatus {
+  Up = 0;
+  Down = 1;
+  Unknown = 99;
+}
+
+message PingResponse {
+  ServerStatus status = 1;
+}

pom.xml

@@ -188,6 +188,44 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.xolstice.maven.plugins</groupId>
+                <artifactId>protobuf-maven-plugin</artifactId>
+                <version>${maven-protobuf-maven-plugin}</version>
+                <configuration>
+                    <protocArtifact>com.google.protobuf:protoc:${protoc.version}:exe:${os.detected.classifier}
+                    </protocArtifact>
+                </configuration>
+                <executions>
+                    <!-- Execution for grpc-java -->
+                    <execution>
+                        <id>grpc-java</id>
+                        <goals>
+                            <goal>compile</goal>
+                            <goal>compile-custom</goal>
+                        </goals>
+                        <configuration>
+                            <pluginId>grpc-java</pluginId>
+                            <pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}
+                            </pluginArtifact>
+                        </configuration>
+                    </execution>
+                    <!-- Execution for vertx-grpc -->
+                    <execution>
+                        <id>vertx-grpc</id>
+                        <goals>
+                            <goal>compile</goal>
+                            <goal>compile-custom</goal>
+                        </goals>
+                        <configuration>
+                            <pluginId>grpc-vertx</pluginId>
+                            <pluginArtifact>
+                                io.vertx:vertx-grpc-protoc-plugin:${vertx.version}:exe:${os.detected.classifier}
+                            </pluginArtifact>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>