edu.indiana.d2i.sloan.CreateVM.java Source code

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/*******************************************************************************
 * Copyright 2014 The Trustees of Indiana University
 * 
 * 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 edu.indiana.d2i.sloan;

import java.util.UUID;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.Consumes;
import javax.ws.rs.DefaultValue;
import javax.ws.rs.FormParam;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import org.apache.commons.io.FilenameUtils;
import org.apache.log4j.Logger;

import edu.indiana.d2i.sloan.bean.ErrorBean;
import edu.indiana.d2i.sloan.bean.CreateVmRequestBean;
import edu.indiana.d2i.sloan.bean.CreateVmResponseBean;
import edu.indiana.d2i.sloan.bean.VmInfoBean;
import edu.indiana.d2i.sloan.db.DBOperations;
import edu.indiana.d2i.sloan.hyper.CreateVMCommand;
import edu.indiana.d2i.sloan.hyper.HypervisorProxy;
import edu.indiana.d2i.sloan.scheduler.SchedulerFactory;

@Path("/createvm")
public class CreateVM {
    private static Logger logger = Logger.getLogger(CreateVM.class);

    @POST
    @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
    @Produces(MediaType.APPLICATION_JSON)
    public Response getResourcePost(@FormParam("imagename") String imageName,
            @FormParam("loginusername") String loginusername, @FormParam("loginpassword") String loginpassword,
            @DefaultValue("1024") @FormParam("memory") int memory, @DefaultValue("1") @FormParam("vcpu") int vcpu,
            @Context HttpHeaders httpHeaders, @Context HttpServletRequest httpServletRequest) {
        String userName = httpServletRequest.getHeader(Constants.USER_NAME);
        String userEmail = httpServletRequest.getHeader(Constants.USER_EMAIL);
        if (userEmail == null)
            userEmail = "";

        // check input
        if (userName == null) {
            logger.error("Username is not present in http header.");
            return Response.status(500).entity(new ErrorBean(500, "Username is not present in http header."))
                    .build();
        }

        if (imageName == null || loginusername == null || loginpassword == null) {
            return Response.status(400)
                    .entity(new ErrorBean(400, "Image name, login username and login password cannot be empty!"))
                    .build();
        }

        try {
            DBOperations.getInstance().insertUserIfNotExists(userName, userEmail);

            // check if image name is valid
            String imagePath = DBOperations.getInstance().getImagePath(imageName);
            if (imagePath == null) {
                return Response.status(400)
                        .entity(new ErrorBean(400, String.format("Image %s does not exist!", imageName))).build();
            }

            // check if policy name is valid

            int volumeSizeInGB = Integer.valueOf(Configuration.getInstance()
                    .getString(Configuration.PropertyName.VOLUME_SIZE_IN_GB, Constants.DEFAULT_VOLUME_SIZE_IN_GB));

            // vm parameters
            String vmid = UUID.randomUUID().toString();
            String workDir = FilenameUtils.concat(
                    Configuration.getInstance().getString(Configuration.PropertyName.DEFAULT_VM_WORKDIR_PREFIX),
                    vmid);
            CreateVmRequestBean request = new CreateVmRequestBean(userName, imageName, vmid, loginusername,
                    loginpassword, memory, vcpu, volumeSizeInGB, workDir);
            logger.info("User " + userName + " tries to create vm " + request);

            // check quota
            if (!DBOperations.getInstance().quotasNotExceedLimit(request)) {
                logger.info("Quota exceeds limit for user " + userName);
                return Response.status(400).entity(new ErrorBean(400, "Quota exceeds limit!")).build();
            }

            // schedule & update db
            VmInfoBean vminfo = SchedulerFactory.getInstance().schedule(request);

            // nonblocking call to hypervisor
            vminfo.setImagePath(imagePath);
            HypervisorProxy.getInstance().addCommand(new CreateVMCommand(vminfo));

            return Response.status(200).entity(new CreateVmResponseBean(vmid)).build();
        } catch (Exception e) {
            logger.error(e.getMessage(), e);
            return Response.status(500).entity(new ErrorBean(500, e.getMessage())).build();
        }
    }
}