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 com.cloud.api.commands;
  
  import com.cloud.api.response.SimulatorHAStateResponse;
  import com.cloud.exception.ConcurrentOperationException;
  import com.cloud.exception.InsufficientCapacityException;
  import com.cloud.exception.NetworkRuleConflictException;
  import com.cloud.exception.ResourceAllocationException;
  import com.cloud.exception.ResourceUnavailableException;
  import com.cloud.host.Host;
  import org.apache.cloudstack.acl.RoleType;
  import org.apache.cloudstack.api.APICommand;
  import org.apache.cloudstack.api.ApiArgValidator;
  import org.apache.cloudstack.api.ApiConstants;
  import org.apache.cloudstack.api.ApiErrorCode;
  import org.apache.cloudstack.api.BaseCmd;
  import org.apache.cloudstack.api.BaseListCmd;
  import org.apache.cloudstack.api.Parameter;
  import org.apache.cloudstack.api.ServerApiException;
  import org.apache.cloudstack.api.response.HostResponse;
  import org.apache.cloudstack.api.response.ListResponse;
  import org.apache.cloudstack.context.CallContext;
  import org.apache.cloudstack.ha.HAManager;
  import org.apache.cloudstack.ha.SimulatorHAProvider;
  
  import javax.inject.Inject;
  import java.util.ArrayList;
  import java.util.List;
  
  @APICommand(name = ListSimulatorHAStateTransitions.APINAME,
          description="list recent simulator HA state transitions for a host for probing and testing",
          responseObject=SimulatorHAStateResponse.class,
          since = "4.11", authorized = {RoleType.Admin})
  public final class ListSimulatorHAStateTransitions extends BaseListCmd {
      public static final String APINAME = "listSimulatorHAStateTransitions";
  
      @Inject
      private HAManager haManager;
  
      /////////////////////////////////////////////////////
      //////////////// API parameters /////////////////////
      /////////////////////////////////////////////////////
  
      @Parameter(name = ApiConstants.HOST_ID, type = BaseCmd.CommandType.UUID, entityType = HostResponse.class,
              description = "List by host ID", required = true, validations = {ApiArgValidator.PositiveNumber})
      private Long hostId;
  
      /////////////////////////////////////////////////////
      /////////////////// Accessors ///////////////////////
      /////////////////////////////////////////////////////
  
      public Long getHostId() {
          return hostId;
      }
  
      /////////////////////////////////////////////////////
      /////////////// API Implementation///////////////////
      /////////////////////////////////////////////////////
  
      @Override
      public void execute() throws ResourceUnavailableException, InsufficientCapacityException, ServerApiException, ConcurrentOperationException, ResourceAllocationException, NetworkRuleConflictException {
          final Host host = _resourceService.getHost(getHostId());
          if (host == null) {
              throw new ServerApiException(ApiErrorCode.PARAM_ERROR, "Unable to find host by ID: " + getHostId());
          }
  
          final SimulatorHAProvider simulatorHAProvider = (SimulatorHAProvider) haManager.getHAProvider(SimulatorHAProvider.class.getSimpleName().toLowerCase());
          List<SimulatorHAStateResponse> recentStates = new ArrayList<>();
          if (simulatorHAProvider != null) {
              recentStates = simulatorHAProvider.listHAStateTransitions(host.getId());
          }
          final ListResponse<SimulatorHAStateResponse> response = new ListResponse<>();
          response.setResponses(recentStates);
          response.setResponseName(getCommandName());
          response.setObjectName("simulatorhastatetransition");
          setResponseObject(response);
      }
  
      @Override
      public String getCommandName() {
          return APINAME.toLowerCase() + BaseCmd.RESPONSE_SUFFIX;
      }
  
      @Override
      public long getEntityOwnerId() {
          return CallContext.current().getCallingAccountId();
      }
  }
  