Package org.hpi.service

Source Code of org.hpi.service.ListInvokersService

package org.hpi.service;

import java.util.List;

import org.com.tatu.helper.GeneralsHelper;
import org.hpi.dialogue.protocol.entities.Invoker;
import org.hpi.dialogue.protocol.response.ListInvokersResponse;
import org.hpi.dialogue.protocol.response.Response;
import org.hpi.dialogue.protocol.service.HPIClientProtocol;
import org.hpi.service.command.Command;
import org.hpi.service.command.SessionedCommand;

public class ListInvokersService extends SessionedCommand implements Command {

  public static final String COMMAND = "-list";
 
  public ListInvokersService(String sessionId) {
    super(sessionId);
  }

  @Override
  public String execute(HPIClientProtocol clientProtocol) {
    // list invokers
    StringBuffer returning = new StringBuffer();
    ListInvokersResponse invokersResponse = clientProtocol.listInvokers(this.getSessionId());
    if (invokersResponse.getStatus().equals(Response.Status.SUCCESS)) {
      List<Invoker> invokers = invokersResponse.getListInvokers();
      if (GeneralsHelper.isCollectionOk(invokers)) {
        for (Invoker invoker : invokers) {
          returning.append("\n");
          returning.append("\t" + invoker.getId());
        }
      } else {
        returning.append("The server has not found no invoker.");
      }
    } else if (invokersResponse.getStatus().equals(Response.Status.FAIL)) {
      returning.append(invokersResponse.getMessage());
    } else throw new IllegalStateException("Unkonw the server's status code response");
   
    return returning.toString();
  }

}
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