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/*
* Copyright 2016-2017, Nokia Corporation
*
* 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 org.onap.vfc.nfvo.driver.vnfm.svnfm.nokia.onap.core;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.concurrent.TimeUnit;
import org.onap.vfc.nfvo.driver.vnfm.svnfm.nokia.api.VimInfoProvider;
import org.onap.vfc.nfvo.driver.vnfm.svnfm.nokia.api.VnfmInfoProvider;
import org.onap.vnfmdriver.model.VnfmInfo;
import org.slf4j.Logger;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.core.env.Environment;
import static java.lang.Long.valueOf;
import static com.google.common.cache.CacheBuilder.newBuilder;
import static org.onap.vfc.nfvo.driver.vnfm.svnfm.nokia.util.CbamUtils.buildFatalFailure;
import static org.slf4j.LoggerFactory.getLogger;
/**
* Responsible for providing access to core systems
*/
public abstract class GenericExternalSystemInfoProvider extends IpMappingProvider implements VnfmInfoProvider, VimInfoProvider, InitializingBean {
/**
* The name of the VNFM info cache eviction in the properties file
*/
public static final String VNFM_INFO_CACHE_EVICTION_IN_MS = "vnfmInfoCacheEvictionInMs";
/**
* The default VNFM info cache eviction in milliseconds
*/
public static final int DEFAULT_CACHE_EVICTION_TIMEOUT_IN_MS = 10 * 60 * 1000;
private static Logger logger = getLogger(GenericExternalSystemInfoProvider.class);
private final Environment environment;
private LoadingCache<String, VnfmInfo> vnfmInfoCache;
public GenericExternalSystemInfoProvider(Environment environment) {
super(environment);
this.environment = environment;
}
/**
* After the Bean has been initialized the IP mapping and the VMFM cache is initialized
* It is done in this phase because the logic requires the the @Value anoted fields to
* be specified
*/
@Override
public void afterPropertiesSet() throws Exception {
super.afterPropertiesSet();
vnfmInfoCache = newBuilder().expireAfterWrite(environment.getProperty(VNFM_INFO_CACHE_EVICTION_IN_MS, Long.class, valueOf(DEFAULT_CACHE_EVICTION_TIMEOUT_IN_MS)), TimeUnit.MILLISECONDS).concurrencyLevel(1).build(new CacheLoader<String, VnfmInfo>() {
@Override
public VnfmInfo load(String vnfmId) throws Exception {
logger.info("Querying VNFM info from source with " + vnfmId + " identifier");
return queryVnfmInfoFromSource(vnfmId);
}
});
}
/*
* @param vnfmId the identifier of the VNFM
* @return the cached VNFM
*/
public VnfmInfo getVnfmInfo(String vnfmId) {
try {
return vnfmInfoCache.get(vnfmId);
} catch (Exception e) {
throw buildFatalFailure(logger, "Unable to query VNFM info for " + vnfmId, e);
}
}
/**
* Load the information related to the VNFM from the remote source
*
* @param vnfmId the identifier of the VNFM
* @return the description of the VNFM
*/
public abstract VnfmInfo queryVnfmInfoFromSource(String vnfmId);
}
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