add ping executor

jraft-core/src/main/java/com/alipay/sofa/jraft/rpc/RaftRpcServerFactory.java

@@ -71,8 +71,22 @@ public static RpcServer createRaftRpcServer(final Endpoint endpoint) {
      */
     public static RpcServer createRaftRpcServer(final Endpoint endpoint, final Executor raftExecutor,
                                                 final Executor cliExecutor) {
+        return createRaftRpcServer(endpoint, raftExecutor, cliExecutor, null);
+    }
+
+    /**
+     * Creates a raft RPC server with executors to handle requests.
+     *
+     * @param endpoint      server address to bind
+     * @param raftExecutor  executor to handle RAFT requests.
+     * @param cliExecutor   executor to handle CLI service requests.
+     * @param pingExecutor  executor to handle ping requests.
+     * @return a rpc server instance
+     */
+    public static RpcServer createRaftRpcServer(final Endpoint endpoint, final Executor raftExecutor,
+                                                final Executor cliExecutor, final Executor pingExecutor) {
         final RpcServer rpcServer = RpcFactoryHelper.rpcFactory().createRpcServer(endpoint);
-        addRaftRequestProcessors(rpcServer, raftExecutor, cliExecutor);
+        addRaftRequestProcessors(rpcServer, raftExecutor, cliExecutor, pingExecutor);
         return rpcServer;
     }
 
@@ -94,6 +108,19 @@ public static void addRaftRequestProcessors(final RpcServer rpcServer) {
      */
     public static void addRaftRequestProcessors(final RpcServer rpcServer, final Executor raftExecutor,
                                                 final Executor cliExecutor) {
+        addRaftRequestProcessors(rpcServer, raftExecutor, cliExecutor, null);
+    }
+
+    /**
+     * Adds RAFT and CLI service request processors.
+     *
+     * @param rpcServer    rpc server instance
+     * @param raftExecutor executor to handle RAFT requests.
+     * @param cliExecutor  executor to handle CLI service requests.
+     * @param pingExecutor executor to handle ping requests.
+     */
+    public static void addRaftRequestProcessors(final RpcServer rpcServer, final Executor raftExecutor,
+                                                final Executor cliExecutor, final Executor pingExecutor) {
         // raft core processors
         final AppendEntriesRequestProcessor appendEntriesRequestProcessor = new AppendEntriesRequestProcessor(
             raftExecutor);
@@ -102,7 +129,7 @@ public static void addRaftRequestProcessors(final RpcServer rpcServer, final Exe
         rpcServer.registerProcessor(new GetFileRequestProcessor(raftExecutor));
         rpcServer.registerProcessor(new InstallSnapshotRequestProcessor(raftExecutor));
         rpcServer.registerProcessor(new RequestVoteRequestProcessor(raftExecutor));
-        rpcServer.registerProcessor(new PingRequestProcessor());
+        rpcServer.registerProcessor(new PingRequestProcessor(pingExecutor));
         rpcServer.registerProcessor(new TimeoutNowRequestProcessor(raftExecutor));
         rpcServer.registerProcessor(new ReadIndexRequestProcessor(raftExecutor));
         // raft cli service

jraft-core/src/main/java/com/alipay/sofa/jraft/rpc/impl/PingRequestProcessor.java

@@ -22,6 +22,8 @@
 import com.alipay.sofa.jraft.rpc.RpcRequests.PingRequest;
 import com.alipay.sofa.jraft.util.RpcFactoryHelper;
 
+import java.util.concurrent.Executor;
+
 /**
  * Ping request processor.
  *
@@ -30,6 +32,12 @@
  */
 public class PingRequestProcessor implements RpcProcessor<PingRequest> {
 
+    private final Executor executor;
+
+    public PingRequestProcessor(Executor executor) {
+        this.executor = executor;
+    }
+
     @Override
     public void handleRequest(final RpcContext rpcCtx, final PingRequest request) {
         rpcCtx.sendResponse( //
@@ -42,4 +50,9 @@ public void handleRequest(final RpcContext rpcCtx, final PingRequest request) {
     public String interest() {
         return PingRequest.class.getName();
     }
+
+    @Override
+    public Executor executor() {
+        return this.executor;
+    }
 }

jraft-core/src/test/java/com/alipay/sofa/jraft/rpc/ConnectionRefreshTest.java

@@ -35,7 +35,7 @@ public void simulation() throws InterruptedException {
         ProtobufMsgFactory.load();
 
         final RpcServer server = RpcFactoryHelper.rpcFactory().createRpcServer(new Endpoint("127.0.0.1", 19991));
-        server.registerProcessor(new PingRequestProcessor());
+        server.registerProcessor(new PingRequestProcessor(null));
         server.init(null);
 
         final Endpoint target = new Endpoint("my.test.host1.com", 19991);

jraft-core/src/test/java/com/alipay/sofa/jraft/rpc/impl/PingRequestProcessorTest.java

@@ -28,7 +28,7 @@ public class PingRequestProcessorTest {
 
     @Test
     public void testHandlePing() throws Exception {
-        PingRequestProcessor processor = new PingRequestProcessor();
+        PingRequestProcessor processor = new PingRequestProcessor(null);
         MockAsyncContext ctx = new MockAsyncContext();
         processor.handleRequest(ctx, TestUtils.createPingRequest());
         ErrorResponse response = (ErrorResponse) ctx.getResponseObject();

jraft-extension/rpc-grpc-impl/src/test/java/com/alipay/sofa/jraft/rpc/ConnectionRefreshTest.java

@@ -35,7 +35,7 @@ public void simulation() throws InterruptedException {
         ProtobufMsgFactory.load();
 
         final RpcServer server = RpcFactoryHelper.rpcFactory().createRpcServer(new Endpoint("127.0.0.1", 19991));
-        server.registerProcessor(new PingRequestProcessor());
+        server.registerProcessor(new PingRequestProcessor(null));
         server.init(null);
 
         final Endpoint target = new Endpoint("my.test.host1.com", 19991);

jraft-extension/rpc-grpc-impl/src/test/java/com/alipay/sofa/jraft/rpc/impl/PingRequestProcessorTest.java

@@ -28,7 +28,7 @@ public class PingRequestProcessorTest {
 
     @Test
     public void testHandlePing() throws Exception {
-        PingRequestProcessor processor = new PingRequestProcessor();
+        PingRequestProcessor processor = new PingRequestProcessor(null);
         MockAsyncContext ctx = new MockAsyncContext();
         processor.handleRequest(ctx, TestUtils.createPingRequest());
         ErrorResponse response = (ErrorResponse) ctx.getResponseObject();