code: /*
   * Copyright © 2014-2017 EntIT Software LLC, a Micro Focus company (L.P.)
   *
   * Licensed 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 io.cloudslang.engine.node.services;
  
  
  import com.fasterxml.jackson.databind.SerializationFeature;
  import com.fasterxml.jackson.databind.DeserializationFeature;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.ObjectWriter;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.jmx.export.annotation.ManagedAttribute;
  import org.springframework.jmx.export.annotation.ManagedOperation;
  import org.springframework.jmx.export.annotation.ManagedResource;
  
  import java.io.IOException;
  
  /**
   * User:
   * Date: 2/9/13
   */
  @ManagedResource(description = "Worker Nodes Managing API")
  public class WorkersMBean {
  	@Autowired
  
  	private WorkerNodeService workerNodeService;
  
      private ObjectMapper mapper;
  
      private ObjectMapper objectMapper(){
          if (mapper == null) {
              mapper = new ObjectMapper();
  
              mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
              mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
          }
          return mapper;
      }
  
  	@ManagedAttribute(description = "Number of active workers")
  	public int getActiveWorkers(){
  		return workerNodeService.readWorkersByActivation(true).size();
  	}
  
  	@ManagedAttribute(description = "Number of all registered workers")
  	public int getTotalWorkers(){
  		return workerNodeService.readAllWorkers().size();
  	}
  
  	@ManagedOperation(description = "Returns a list of all registered workers")
  	public String showWorkers() throws IOException {
  		ObjectWriter objectWriter = objectMapper().writerWithDefaultPrettyPrinter();
  		return objectWriter.writeValueAsString(workerNodeService.readAllWorkers());
  	}
  
      /*I remove this due to security issue this present*/
  /*	@ManagedOperation(description = "Activates specified worker")
  	@ManagedOperationParameters(
  			@ManagedOperationParameter(name = "worker UUID", description = "Worker UUID to be activated")
  	)
  	public void activateWorker(String workerUuid){
  		workerNodeService.activate(workerUuid);
  	}
  
  	@ManagedOperation(description = "Deactivates specified worker")
  	@ManagedOperationParameters(
  			@ManagedOperationParameter(name = "worker UUID", description = "Worker UUID to be deactivated")
  	)
  	public void deactivateWorker(String workerUuid){
  		workerNodeService.deactivate(workerUuid);
  	}*/
  }