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.cloudstack.network.lb;
  
  import java.util.List;
  import java.util.Map;
  
  import com.cloud.deploy.DeployDestination;
  import com.cloud.exception.ConcurrentOperationException;
  import com.cloud.exception.InsufficientCapacityException;
  import com.cloud.exception.ResourceUnavailableException;
  import com.cloud.network.Network;
  import com.cloud.network.lb.LoadBalancingRule;
  import com.cloud.network.router.VirtualRouter;
  import com.cloud.user.Account;
  import com.cloud.utils.net.Ip;
  import com.cloud.vm.VirtualMachineProfile.Param;
  
  public interface InternalLoadBalancerVMManager {
      //RAM/CPU for the system offering used by Internal LB VMs
      public static final int DEFAULT_INTERNALLB_VM_RAMSIZE = 512;            // 512 MB
      public static final int DEFAULT_INTERNALLB_VM_CPU_MHZ = 256;            // 256 MHz
  
      /**
       * Destroys Internal LB vm instance
       * @param vmId
       * @param caller
       * @param callerUserId
       * @return
       * @throws ResourceUnavailableException
       * @throws ConcurrentOperationException
       */
      boolean destroyInternalLbVm(long vmId, Account caller, Long callerUserId) throws ResourceUnavailableException, ConcurrentOperationException;
  
      /**
       * Deploys internal lb vm
       * @param guestNetwork
       * @param requestedGuestIp
       * @param dest
       * @param owner
       * @param params
       * @return
       * @throws InsufficientCapacityException
       * @throws ConcurrentOperationException
       * @throws ResourceUnavailableException
       */
      List<? extends VirtualRouter> deployInternalLbVm(Network guestNetwork, Ip requestedGuestIp, DeployDestination dest, Account owner, Map<Param, Object> params)
          throws InsufficientCapacityException, ConcurrentOperationException, ResourceUnavailableException;
  
      /**
       *
       * @param network
       * @param rules
       * @param internalLbVms
       * @return
       * @throws ResourceUnavailableException
       */
      boolean applyLoadBalancingRules(Network network, List<LoadBalancingRule> rules, List<? extends VirtualRouter> internalLbVms) throws ResourceUnavailableException;
  
      /**
       * Returns existing Internal Load Balancer elements based on guestNetworkId (required) and requestedIp (optional)
       * @param guestNetworkId
       * @param requestedGuestIp
       * @return
       */
      List<? extends VirtualRouter> findInternalLbVms(long guestNetworkId, Ip requestedGuestIp);
  
  }
  