RATIS-1430. Add ratis-shell addPeer command

ratis-shell/src/main/java/org/apache/ratis/shell/cli/sh/command/QuorumAddCommand.java

@@ -0,0 +1,121 @@
+/*
+ * 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.ratis.shell.cli.sh.command;
+
+import org.apache.commons.cli.CommandLine;
+import org.apache.commons.cli.Option;
+import org.apache.commons.cli.Options;
+import org.apache.ratis.client.RaftClient;
+import org.apache.ratis.protocol.RaftClientReply;
+import org.apache.ratis.protocol.RaftPeer;
+import org.apache.ratis.protocol.RaftPeerId;
+import org.apache.ratis.shell.cli.RaftUtils;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+/**
+ * Command for remove ratis server.
+ */
+public class QuorumAddCommand extends AbstractRatisCommand {
+  public static final String ADD_PEER_ADDRESS_OPTION_NAME = "addPeer";
+
+  /**
+   * @param context command context
+   */
+  public QuorumAddCommand(Context context) {
+    super(context);
+  }
+
+  @Override
+  public String getCommandName() {
+    return "quorumAdd";
+  }
+
+  @Override
+  public int run(CommandLine cl) throws IOException {
+    super.run(cl);
+    Map<RaftPeerId, InetSocketAddress> raftPeerInfos = new HashMap<>();
+    for (String address : cl.getOptionValues(ADD_PEER_ADDRESS_OPTION_NAME)) {
+      String[] str = address.split(":");
+      if(str.length < 2) {
+        println("The format of the parameter is wrong");
+        return -1;
+      }
+      InetSocketAddress serverAddress = InetSocketAddress
+              .createUnresolved(str[0], Integer.parseInt(str[1]));
+      RaftPeerId peerId = RaftUtils.getPeerId(serverAddress);
+      raftPeerInfos.put(peerId, serverAddress);
+    }
+
+    try (RaftClient client = RaftUtils.createClient(getRaftGroup())) {
+      List<RaftPeer> peers = new ArrayList<>(getRaftGroup().getPeers());
+      List<RaftPeerId> peerIdList = getRaftGroup().getPeers().stream()
+              .map(RaftPeer::getId).collect(Collectors.toList());
+      for (RaftPeerId id : raftPeerInfos.keySet()) {
+        if (!peerIdList.contains(id)) {
+          peers.add(RaftPeer.newBuilder()
+                  .setId(id)
+                  .setAddress(raftPeerInfos.get(id))
+                  .setPriority(0)
+                  .build());
+        }
+      }
+      RaftClientReply reply = client.admin().setConfiguration(peers);
+      processReply(reply, () ->"failed to add raft peer");
+    }
+    return 0;
+  }
+
+  @Override
+  public String getUsage() {
+    return String.format("%s"
+                    + " -%s <PEER0_HOST:PEER0_PORT,PEER1_HOST:PEER1_PORT,PEER2_HOST:PEER2_PORT>"
+                    + " [-%s <RAFT_GROUP_ID>]"
+                    + " -%s <PEER_HOST:PEER_PORT>",
+            getCommandName(), PEER_OPTION_NAME, GROUPID_OPTION_NAME, ADD_PEER_ADDRESS_OPTION_NAME);
+  }
+
+  @Override
+  public String getDescription() {
+    return description();
+  }
+
+  @Override
+  public Options getOptions() {
+    return super.getOptions().addOption(
+            Option.builder()
+                    .option(ADD_PEER_ADDRESS_OPTION_NAME)
+                    .hasArg()
+                    .required()
+                    .desc("peer address to be added")
+                    .build());
+  }
+
+  /**
+   * @return command's description
+   */
+  public static String description() {
+    return "Add peers of a ratis group";
+  }
+}