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/*-
 * ============LICENSE_START=======================================================
 * openECOMP : SDN-C
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. 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.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.sdnc.rm.comp;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.openecomp.sdnc.lock.comp.LockHelper;
import org.openecomp.sdnc.rm.dao.ResourceDao;
import org.openecomp.sdnc.rm.data.AllocationOutcome;
import org.openecomp.sdnc.rm.data.AllocationRequest;
import org.openecomp.sdnc.rm.data.Resource;
import org.openecomp.sdnc.rm.util.ResourceUtil;
import org.openecomp.sdnc.util.str.StrUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ResourceManagerImpl implements ResourceManager {

    private static final Logger log = LoggerFactory.getLogger(ResourceManagerImpl.class);

    private LockHelper lockHelper;
    private ResourceDao resourceDao;

    private String applicationId;
    private int lockTimeout = 10 * 60; // Default 10 min

    public ResourceManagerImpl() {
        log.info("ResourceManager created.");
    }

    @Override
    public Resource getResource(String resourceName, String assetId) {
        Resource r = resourceDao.getResource(assetId, resourceName);
        ResourceUtil.recalculate(r);
        return r;
    }

    @Override
    public List<Resource> getResourceUnion(String resourceUnionId) {
        List<Resource> rlist = resourceDao.getResourceUnion(resourceUnionId);
        for (Resource r : rlist)
            ResourceUtil.recalculate(r);
        return rlist;
    }

    @Override
    public AllocationOutcome allocateResources(AllocationRequest allocationRequest) {
        if (allocationRequest == null)
            throw new IllegalArgumentException("allocateResources called with null argument");

        AllocationFunction allocationFunction =
                new AllocationFunction(lockHelper, resourceDao, applicationId, allocationRequest, lockTimeout);
        allocationFunction.exec();
        AllocationOutcome allocationOutcome = allocationFunction.getAllocationOutcome();

        StrUtil.info(log, allocationOutcome);

        return allocationOutcome;
    }

    @Override
    public void releaseResourceSet(String resourceSetId) {
        List<Resource> resourceList = resourceDao.getResourceSet(resourceSetId);
        if (resourceList == null || resourceList.isEmpty())
            return;

        Set<String> lockNames = getLockNames(resourceList);
        ReleaseFunction releaseFunction =
                new ReleaseFunction(lockHelper, resourceDao, resourceSetId, null, lockNames, lockTimeout);
        releaseFunction.exec();
    }

    @Override
    public void releaseResourceUnion(String resourceUnionId) {
        List<Resource> resourceList = resourceDao.getResourceUnion(resourceUnionId);
        if (resourceList == null || resourceList.isEmpty())
            return;

        Set<String> lockNames = getLockNames(resourceList);
        ReleaseFunction releaseFunction =
                new ReleaseFunction(lockHelper, resourceDao, null, resourceUnionId, lockNames, lockTimeout);
        releaseFunction.exec();
    }

    private Set<String> getLockNames(List<Resource> resourceList) {
        Set<String> lockNames = new HashSet<String>();
        for (Resource r : resourceList)
            lockNames.add(r.resourceKey.assetId);
        return lockNames;
    }

    public void setResourceDao(ResourceDao resourceDao) {
        this.resourceDao = resourceDao;
    }

    public void setLockTimeout(int lockTimeout) {
        this.lockTimeout = lockTimeout;
    }

    public void setApplicationId(String applicationId) {
        this.applicationId = applicationId;
    }

    public void setLockHelper(LockHelper lockHelper) {
        this.lockHelper = lockHelper;
    }
}