// Copyright 2012 Citrix Systems, Inc. Licensed under the
// Apache License, Version 2.0 (the "License"); you may not use this
// file except in compliance with the License.  Citrix Systems, Inc.
// reserves all rights not expressly granted by 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.
// 
// Automatically generated by addcopyright.py at 04/03/2012
package com.cloud.cluster.agentlb.dao;

import java.util.Date;
import java.util.List;

import javax.ejb.Local;

import org.apache.log4j.Logger;

import com.cloud.cluster.agentlb.HostTransferMapVO;
import com.cloud.cluster.agentlb.HostTransferMapVO.HostTransferState;
import com.cloud.utils.db.DB;
import com.cloud.utils.db.GenericDaoBase;
import com.cloud.utils.db.SearchBuilder;
import com.cloud.utils.db.SearchCriteria;

@Local(value = { HostTransferMapDao.class })
@DB(txn = false)
public class HostTransferMapDaoImpl extends GenericDaoBase<HostTransferMapVO, Long> implements HostTransferMapDao {
    private static final Logger s_logger = Logger.getLogger(HostTransferMapDaoImpl.class);

    protected final SearchBuilder<HostTransferMapVO> AllFieldsSearch;
    protected final SearchBuilder<HostTransferMapVO> IntermediateStateSearch;
    protected final SearchBuilder<HostTransferMapVO> ActiveSearch;

    public HostTransferMapDaoImpl() {
        AllFieldsSearch = createSearchBuilder();
        AllFieldsSearch.and("id", AllFieldsSearch.entity().getId(), SearchCriteria.Op.EQ);
        AllFieldsSearch.and("initialOwner", AllFieldsSearch.entity().getInitialOwner(), SearchCriteria.Op.EQ);
        AllFieldsSearch.and("futureOwner", AllFieldsSearch.entity().getFutureOwner(), SearchCriteria.Op.EQ);
        AllFieldsSearch.and("state", AllFieldsSearch.entity().getState(), SearchCriteria.Op.EQ);
        AllFieldsSearch.done();
        
        IntermediateStateSearch = createSearchBuilder();
        IntermediateStateSearch.and("futureOwner", IntermediateStateSearch.entity().getFutureOwner(), SearchCriteria.Op.EQ);
        IntermediateStateSearch.and("initialOwner", IntermediateStateSearch.entity().getInitialOwner(), SearchCriteria.Op.EQ);
        IntermediateStateSearch.and("state", IntermediateStateSearch.entity().getState(), SearchCriteria.Op.IN);
        IntermediateStateSearch.done();
        
        ActiveSearch = createSearchBuilder();
        ActiveSearch.and("created", ActiveSearch.entity().getCreated(),  SearchCriteria.Op.GT);
        ActiveSearch.and("id", ActiveSearch.entity().getId(), SearchCriteria.Op.EQ);
        ActiveSearch.and("state", ActiveSearch.entity().getState(), SearchCriteria.Op.EQ);
        ActiveSearch.done();
        
    }

    @Override
    public List<HostTransferMapVO> listHostsLeavingCluster(long currentOwnerId) {
        SearchCriteria<HostTransferMapVO> sc = IntermediateStateSearch.create();
        sc.setParameters("initialOwner", currentOwnerId);

        return listBy(sc);
    }

    @Override
    public List<HostTransferMapVO> listHostsJoiningCluster(long futureOwnerId) {
        SearchCriteria<HostTransferMapVO> sc = IntermediateStateSearch.create();
        sc.setParameters("futureOwner", futureOwnerId);

        return listBy(sc);
    }
    
    @Override
    public HostTransferMapVO startAgentTransfering(long hostId, long initialOwner, long futureOwner) {
        HostTransferMapVO transfer = new HostTransferMapVO(hostId, initialOwner, futureOwner);
        return persist(transfer); 
    }

    @Override
    public boolean completeAgentTransfer(long hostId) {
        return remove(hostId);
    }
    
    @Override
    public List<HostTransferMapVO> listBy(long futureOwnerId, HostTransferState state) {
        SearchCriteria<HostTransferMapVO> sc = AllFieldsSearch.create();
        sc.setParameters("futureOwner", futureOwnerId);
        sc.setParameters("state", state);

        return listBy(sc);
    }
    
    @Override
    public HostTransferMapVO findActiveHostTransferMapByHostId(long hostId, Date cutTime) {
        SearchCriteria<HostTransferMapVO> sc = ActiveSearch.create();
        sc.setParameters("id", hostId);
        sc.setParameters("state", HostTransferState.TransferRequested);
        sc.setParameters("created", cutTime);
        
        return findOneBy(sc);
        
    }
    
    @Override
    public boolean startAgentTransfer(long hostId) {
        HostTransferMapVO transfer = findById(hostId);
        transfer.setState(HostTransferState.TransferStarted);
        return update(hostId, transfer);
    }
    
    
    @Override
    public HostTransferMapVO findByIdAndFutureOwnerId(long id, long futureOwnerId) {
        SearchCriteria<HostTransferMapVO> sc = AllFieldsSearch.create();
        sc.setParameters("futureOwner", futureOwnerId);
        sc.setParameters("id", id);

        return findOneBy(sc);
    }
    
    
    @Override
    public HostTransferMapVO findByIdAndCurrentOwnerId(long id, long currentOwnerId) {
        SearchCriteria<HostTransferMapVO> sc = AllFieldsSearch.create();
        sc.setParameters("initialOwner", currentOwnerId);
        sc.setParameters("id", id);

        return findOneBy(sc);
    }
    
}