content: /*
   * 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.activemq.artemis.cli.commands.user;
  
  import org.apache.activemq.artemis.api.core.JsonUtil;
  import org.apache.activemq.artemis.api.core.management.ManagementHelper;
  import org.apache.activemq.artemis.cli.commands.ActionContext;
  import org.apache.activemq.artemis.json.JsonArray;
  import org.apache.activemq.artemis.json.JsonObject;
  import picocli.CommandLine.Command;
  
  /**
   * list existing users, example:
   * ./artemis user list --user guest
   */
  @Command(name = "list", description = "List user(s).")
  public class ListUser extends UserAction {
  
     @Override
     public Object execute(ActionContext context) throws Exception {
        super.execute(context);
  
        list();
  
        return null;
     }
  
     /**
      * List a single user or all users if username is not specified
      *
      * @throws Exception if communication with the broker fails
      */
     private void list() throws Exception {
        StringBuilder logMessage = new StringBuilder("--- \"user\"(roles) ---\n");
        int userCount = 0;
        final String[] result = new String[1];
  
        performCoreManagement(message -> {
           ManagementHelper.putOperationInvocation(message, "broker", "listUser", userCommandUser);
        }, reply -> {
           result[0] = (String) ManagementHelper.getResult(reply, String.class);
        }, reply -> {
           String errMsg = (String) ManagementHelper.getResult(reply, String.class);
           getActionContext().err.println("Failed to list user " + userCommandUser + ". Reason: " + errMsg);
        });
  
        // process the JSON results from the broker
        JsonArray array = JsonUtil.readJsonArray(result[0]);
        for (int arrayIndex = 0; arrayIndex < array.size(); arrayIndex++) {
           JsonObject object = array.getJsonObject(arrayIndex);
           logMessage.append("\"").append(object.getString("username")).append("\"").append("(");
           JsonArray roles = object.getJsonArray("roles");
           for (int i = 0; i < roles.size(); i++) {
              logMessage.append(roles.getString(i));
              if ((i + 1) < roles.size()) {
                 logMessage.append(",");
              }
           }
           logMessage.append(")\n");
           userCount++;
        }
        logMessage.append("\n Total: ").append(userCount);
        getActionContext().out.println(logMessage);
     }
  
  }
  