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/*
* Copyright © 2019 IBM.
*
* 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.ccsdk.cds.controllerblueprints.core.scripts
import com.google.common.cache.CacheBuilder
import com.google.common.cache.CacheLoader
import com.google.common.cache.LoadingCache
import org.onap.ccsdk.cds.controllerblueprints.core.BlueprintException
import org.onap.ccsdk.cds.controllerblueprints.core.logger
import org.onap.ccsdk.cds.controllerblueprints.core.utils.BlueprintFileUtils
import java.net.URLClassLoader
object BlueprintCompileCache {
val log = logger(BlueprintCompileCache::class)
private val classLoaderCache: LoadingCache<String, URLClassLoader> = CacheBuilder.newBuilder()
.maximumSize(50)
.build(BlueprintClassLoader)
fun classLoader(key: String): URLClassLoader {
return classLoaderCache.get(key)
}
fun cleanClassLoader(key: String) {
if (hasClassLoader(key)) {
// Make sure to close all classloader loaded resources before we let go of it.
// This fixes a Delete failure message on filesystem that keeps locks on opened jars;
// like Windows and NFS.
classLoaderCache.get(key).close()
classLoaderCache.invalidate(key)
log.info("Cleaned compiled cache($key)")
} else {
log.warn("No compiled cache($key) present to clean.")
}
}
fun hasClassLoader(key: String): Boolean {
return classLoaderCache.asMap().containsKey(key)
}
}
object BlueprintClassLoader : CacheLoader<String, URLClassLoader>() {
val log = logger(BlueprintClassLoader::class)
override fun load(key: String) = try {
log.info("loading compiled cache($key)")
BlueprintFileUtils.getURLClassLoaderFromDirectory(key)
} catch (e: Exception) {
throw BlueprintException("failed to load cache($key) with Exception($e)")
}
}
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