com.vmware.photon.controller.apife.commands.steps.HostEnterMaintenanceModeStepCmd.java Source code

Introduction

Here is the source code for com.vmware.photon.controller.apife.commands.steps.HostEnterMaintenanceModeStepCmd.java

Source

/*
 * Copyright 2015 VMware, Inc. All Rights Reserved.
 *
 * 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 com.vmware.photon.controller.apife.commands.steps;

import com.vmware.photon.controller.api.HostState;
import com.vmware.photon.controller.api.common.entities.base.BaseEntity;
import com.vmware.photon.controller.api.common.exceptions.ApiFeException;
import com.vmware.photon.controller.apife.backends.HostBackend;
import com.vmware.photon.controller.apife.backends.StepBackend;
import com.vmware.photon.controller.apife.backends.VmBackend;
import com.vmware.photon.controller.apife.commands.tasks.TaskCommand;
import com.vmware.photon.controller.apife.entities.HostEntity;
import com.vmware.photon.controller.apife.entities.StepEntity;
import com.vmware.photon.controller.apife.exceptions.external.HostHasVmsException;
import com.vmware.photon.controller.apife.exceptions.external.HostStateChangeException;
import com.vmware.photon.controller.common.clients.exceptions.RpcException;

import com.google.common.collect.Iterables;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;

/**
 * StepCommand for host enter maintenance mode.
 */
public class HostEnterMaintenanceModeStepCmd extends StepCommand {

    private static final Logger logger = LoggerFactory.getLogger(HostEnterMaintenanceModeStepCmd.class);

    private final HostBackend hostBackend;
    private final VmBackend vmBackend;

    public HostEnterMaintenanceModeStepCmd(TaskCommand taskCommand, StepBackend stepBackend, StepEntity step,
            HostBackend hostBackend, VmBackend vmBackend) {
        super(taskCommand, stepBackend, step);
        this.hostBackend = hostBackend;
        this.vmBackend = vmBackend;
    }

    @Override
    protected void execute() throws ApiFeException, InterruptedException, RpcException {

        List<BaseEntity> entityList = step.getTransientResourceEntities();

        HostEntity hostEntity = (HostEntity) Iterables.getOnlyElement(entityList);

        int vmCount = vmBackend.countVmsOnHost(hostEntity);
        if (vmCount > 0) {
            throw new HostHasVmsException(hostEntity.getId(), vmCount);
        }

        try {
            taskCommand.getDeployerClient().enterMaintenanceMode(hostEntity.getId());
            hostBackend.updateState(hostEntity, HostState.MAINTENANCE);
        } catch (InterruptedException | RpcException e) {
            HostStateChangeException exception = new HostStateChangeException(hostEntity, HostState.SUSPENDED, e);
            logger.error(exception.getMessage());
            throw exception;
        }
    }

    @Override
    protected void cleanup() {

    }
}