HDFS-17751. [ARR] Add unit tests using asynchronous router rpc for al…

…l in org.apache.hadoop.hdfs.server.federation.router

hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestSafeMode.java

@@ -35,10 +35,10 @@
 public class TestSafeMode {
 
   /** Federated HDFS cluster. */
-  private MiniRouterDFSCluster cluster;
+  protected MiniRouterDFSCluster cluster;
 
   @Before
-  public  void setup() throws Exception {
+  public void setup() throws Exception {
     cluster = new MiniRouterDFSCluster(true, 2);
 
     // Start NNs and DNs and wait until ready

hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/async/TestSafeModeWithRouterAsync.java

@@ -0,0 +1,86 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hdfs.server.federation.router.async;
+
+import static org.apache.hadoop.hdfs.server.federation.FederationTestUtils.NAMENODES;
+
+import java.io.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hdfs.protocol.ClientProtocol;
+import org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction;
+import org.apache.hadoop.hdfs.server.federation.MiniRouterDFSCluster;
+import org.apache.hadoop.hdfs.server.federation.MiniRouterDFSCluster.RouterContext;
+import org.apache.hadoop.hdfs.server.federation.RouterConfigBuilder;
+import org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys;
+import org.apache.hadoop.hdfs.server.federation.router.TestSafeMode;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Test the SafeMode using async router rpc.
+ */
+public class TestSafeModeWithRouterAsync extends TestSafeMode {
+
+  @Before
+  public void setup() throws Exception {
+    cluster = new MiniRouterDFSCluster(true, 2);
+    Configuration routerConf = new RouterConfigBuilder().rpc().build();
+    routerConf.setBoolean(RBFConfigKeys.DFS_ROUTER_ASYNC_RPC_ENABLE_KEY, true);
+    cluster.addRouterOverrides(routerConf);
+
+    // Start NNs and DNs and wait until ready.
+    cluster.startCluster();
+
+    // Start routers with only an RPC service.
+    cluster.startRouters();
+
+    // Register and verify all NNs with all routers.
+    cluster.registerNamenodes();
+    cluster.waitNamenodeRegistration();
+
+    // Setup the mount table.
+    cluster.installMockLocations();
+
+    // Making one Namenodes active per nameservice.
+    if (cluster.isHighAvailability()) {
+      for (String ns : cluster.getNameservices()) {
+        cluster.switchToActive(ns, NAMENODES[0]);
+        cluster.switchToStandby(ns, NAMENODES[1]);
+      }
+    }
+    cluster.waitActiveNamespaces();
+  }
+
+  @After
+  public void teardown() throws IOException {
+    if (cluster != null) {
+      cluster.shutdown();
+      cluster = null;
+    }
+  }
+
+  @Test
+  public void testProxySetSafemode() throws Exception {
+    RouterContext routerContext = cluster.getRandomRouter();
+    ClientProtocol routerProtocol = routerContext.getClient().getNamenode();
+    routerProtocol.setSafeMode(SafeModeAction.SAFEMODE_GET, true);
+    routerProtocol.setSafeMode(SafeModeAction.SAFEMODE_GET, false);
+  }
+}