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.userdata;
  
  import org.apache.cloudstack.api.BaseCmd;
  import org.apache.cloudstack.framework.config.ConfigKey;
  import org.apache.cloudstack.framework.config.Configurable;
  
  import com.cloud.utils.component.Manager;
  
  import java.io.IOException;
  
  public interface UserDataManager extends Manager, Configurable {
      String VM_USERDATA_MAX_LENGTH_STRING = "vm.userdata.max.length";
      ConfigKey<Integer> VM_USERDATA_MAX_LENGTH = new ConfigKey<>("Advanced", Integer.class, VM_USERDATA_MAX_LENGTH_STRING, "32768",
              "Max length of vm userdata after base64 encoding. Default is 32768 and maximum is 1048576", true);
  
      String concatenateUserData(String userdata1, String userdata2, String userdataProvider);
      String validateUserData(String userData, BaseCmd.HTTPMethod httpmethod);
  
      /**
       * This method validates the user data uuid for system VMs and returns the user data
       * after compression and base64 encoding for the system VM to consume.
       *
       * @param userDataUuid
       * @return a String containing the user data after compression and base64 encoding
       * @throws IOException
       */
      String validateAndGetUserDataForSystemVM(String userDataUuid) throws IOException;
  }
  