/*
- * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
+ * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
+ *
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.yangtools.yang.model.repo.util;
-import com.google.common.base.Preconditions;
+import com.google.common.annotations.Beta;
+import com.google.common.base.FinalizablePhantomReference;
+import com.google.common.base.FinalizableReferenceQueue;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
-import com.google.common.cache.RemovalListener;
-import com.google.common.cache.RemovalNotification;
import com.google.common.util.concurrent.CheckedFuture;
import com.google.common.util.concurrent.Futures;
-
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
import org.opendaylight.yangtools.yang.model.repo.api.MissingSchemaSourceException;
import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceException;
import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceRepresentation;
import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceRegistration;
import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceRegistry;
-public class InMemorySchemaSourceCache<T extends SchemaSourceRepresentation> extends AbstractSchemaSourceCache<T> {
- private static final class CacheEntry<T extends SchemaSourceRepresentation> {
- private final SchemaSourceRegistration<T> reg;
- private final T source;
+@Beta
+public class InMemorySchemaSourceCache<T extends SchemaSourceRepresentation> extends AbstractSchemaSourceCache<T>
+ implements AutoCloseable {
+ private final List<FinalizablePhantomReference<T>> regs = Collections.synchronizedList(new ArrayList<>());
+ private final FinalizableReferenceQueue queue = new FinalizableReferenceQueue();
+ private final Cache<SourceIdentifier, T> cache;
- public CacheEntry(final T source, final SchemaSourceRegistration<T> reg) {
- this.source = Preconditions.checkNotNull(source);
- this.reg = Preconditions.checkNotNull(reg);
- }
+ protected InMemorySchemaSourceCache(final SchemaSourceRegistry consumer, final Class<T> representation,
+ final CacheBuilder<Object, Object> builder) {
+ super(consumer, representation, Costs.IMMEDIATE);
+ cache = builder.build();
}
- private static final RemovalListener<SourceIdentifier, CacheEntry<?>> LISTENER = new RemovalListener<SourceIdentifier, CacheEntry<?>>() {
- @Override
- public void onRemoval(final RemovalNotification<SourceIdentifier, CacheEntry<?>> notification) {
- notification.getValue().reg.close();
- }
- };
-
- private final Cache<SourceIdentifier, CacheEntry<T>> cache;
+ public static <R extends SchemaSourceRepresentation> InMemorySchemaSourceCache<R> createSoftCache(
+ final SchemaSourceRegistry consumer, final Class<R> representation) {
+ return new InMemorySchemaSourceCache<>(consumer, representation, CacheBuilder.newBuilder().softValues());
+ }
- protected InMemorySchemaSourceCache(final SchemaSourceRegistry consumer, final Class<T> representation, final int maxSize) {
- super(consumer, representation, Costs.IMMEDIATE);
- cache = CacheBuilder.newBuilder().softValues().maximumSize(maxSize).removalListener(LISTENER).build();
+ public static <R extends SchemaSourceRepresentation> InMemorySchemaSourceCache<R> createSoftCache(
+ final SchemaSourceRegistry consumer, final Class<R> representation, final long lifetime,
+ final TimeUnit units) {
+ return new InMemorySchemaSourceCache<>(consumer, representation, CacheBuilder.newBuilder().softValues()
+ .expireAfterAccess(lifetime, units));
}
@Override
public CheckedFuture<? extends T, SchemaSourceException> getSource(final SourceIdentifier sourceIdentifier) {
- final CacheEntry<T> present = cache.getIfPresent(sourceIdentifier);
+ final T present = cache.getIfPresent(sourceIdentifier);
if (present != null) {
- return Futures.immediateCheckedFuture(present.source);
+ return Futures.immediateCheckedFuture(present);
}
- return Futures.<T, SchemaSourceException>immediateFailedCheckedFuture(new MissingSchemaSourceException("Source not found"));
+ return Futures.immediateFailedCheckedFuture(new MissingSchemaSourceException("Source not found",
+ sourceIdentifier));
}
@Override
protected void offer(final T source) {
- final CacheEntry<T> present = cache.getIfPresent(source.getIdentifier());
+ final T present = cache.getIfPresent(source.getIdentifier());
if (present == null) {
+ cache.put(source.getIdentifier(), source);
+
final SchemaSourceRegistration<T> reg = register(source.getIdentifier());
- cache.put(source.getIdentifier(), new CacheEntry<T>(source, reg));
+ final FinalizablePhantomReference<T> ref = new FinalizablePhantomReference<T>(source, queue) {
+ @Override
+ public void finalizeReferent() {
+ reg.close();
+ regs.remove(this);
+ }
+ };
+
+ regs.add(ref);
}
}
+
+ @Override
+ public void close() {
+ while (!regs.isEmpty()) {
+ final FinalizablePhantomReference<?> ref = regs.get(0);
+ ref.finalizeReferent();
+ }
+
+ cache.invalidateAll();
+ queue.close();
+ }
}