*
* 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/eplv10.html
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.yangtools.yang.model.repo.util;
import com.google.common.annotations.Beta;
-import com.google.common.collect.HashMultimap;
+import com.google.common.collect.ArrayListMultimap;
+import com.google.common.collect.ListMultimap;
+import com.google.common.collect.Lists;
import com.google.common.collect.Multimap;
import com.google.common.util.concurrent.CheckedFuture;
+import com.google.common.util.concurrent.FutureCallback;
import com.google.common.util.concurrent.FutureFallback;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
-
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
+import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
-
import javax.annotation.concurrent.GuardedBy;
-
import org.opendaylight.yangtools.util.concurrent.ExceptionMapper;
import org.opendaylight.yangtools.util.concurrent.ReflectiveExceptionMapper;
import org.opendaylight.yangtools.yang.model.repo.api.MissingSchemaSourceException;
* a specific representation of a source.
*/
@GuardedBy("this")
- private final Map<SourceIdentifier, Multimap<Class<? extends SchemaSourceRepresentation>, AbstractSchemaSourceRegistration<?>>> sources = new HashMap<>();
+ private final Map<SourceIdentifier, ListMultimap<Class<? extends SchemaSourceRepresentation>, AbstractSchemaSourceRegistration<?>>> sources = new HashMap<>();
/*
* Schema source listeners.
@GuardedBy("this")
private final Collection<SchemaListenerRegistration> listeners = new ArrayList<>();
- private static
final <T extends SchemaSourceRepresentation> CheckedFuture<T, SchemaSourceException> fetchSource(final SourceIdentifier id, final Iterator<AbstractSchemaSourceRegistration<?>> it) {
+ private static <T extends SchemaSourceRepresentation> CheckedFuture<T, SchemaSourceException> fetchSource(final SourceIdentifier id, final Iterator<AbstractSchemaSourceRegistration<?>> it) {
final AbstractSchemaSourceRegistration<?> reg = it.next();
@SuppressWarnings("unchecked")
final CheckedFuture<? extends T, SchemaSourceException> f = ((SchemaSourceProvider<T>)reg.getProvider()).getSource(id);
+
return Futures.makeChecked(Futures.withFallback(f, new FutureFallback<T>() {
@Override
public ListenableFuture<T> create(final Throwable t) throws SchemaSourceException {
return fetchSource(id, it);
}
- throw new MissingSchemaSourceException("All available providers exhausted");
+ throw new MissingSchemaSourceException("All available providers exhausted", id, t);
}
}), FETCH_MAPPER);
}
@Override
public <T extends SchemaSourceRepresentation> CheckedFuture<T, SchemaSourceException> getSchemaSource(final SourceIdentifier id, final Class<T> representation) {
- final Multimap<Class<? extends SchemaSourceRepresentation>, AbstractSchemaSourceRegistration<?>> srcs = sources.get(id);
- if (srcs == null) {
- return Futures.<T, SchemaSourceException>immediateFailedCheckedFuture(new MissingSchemaSourceException("No providers registered for source" + id));
+ final ArrayList<AbstractSchemaSourceRegistration<?>> sortedSchemaSourceRegistrations;
+
+ synchronized (this) {
+ final ListMultimap<Class<? extends SchemaSourceRepresentation>, AbstractSchemaSourceRegistration<?>> srcs = sources.get(id);
+ if (srcs == null) {
+ return Futures.<T, SchemaSourceException>immediateFailedCheckedFuture(new MissingSchemaSourceException("No providers registered for source" + id, id));
+ }
+
+ sortedSchemaSourceRegistrations = Lists.newArrayList(srcs.get(representation));
}
- final Iterator<AbstractSchemaSourceRegistration<?>> regs = srcs.get(representation).iterator();
+ // TODO, remove and make sources keep sorted multimap (e.g. ArrayListMultimap with SortedLists)
+ Collections.sort(sortedSchemaSourceRegistrations, SchemaProviderCostComparator.INSTANCE);
+
+ final Iterator<AbstractSchemaSourceRegistration<?>> regs = sortedSchemaSourceRegistrations.iterator();
if (!regs.hasNext()) {
return Futures.<T, SchemaSourceException>immediateFailedCheckedFuture(
- new MissingSchemaSourceException("No providers for source " + id + " representation " + representation + " available"));
+ new MissingSchemaSourceException("No providers for source " + id + " representation " + representation + " available", id));
}
- return fetchSource(id, regs);
+ CheckedFuture<T, SchemaSourceException> fetchSourceFuture = fetchSource(id, regs);
+ // Add callback to notify cache listeners about encountered schema
+ Futures.addCallback(fetchSourceFuture, new FutureCallback<T>() {
+ @Override
+ public void onSuccess(final T result) {
+ for (final SchemaListenerRegistration listener : listeners) {
+ listener.getInstance().schemaSourceEncountered(result);
+ }
+ }
+
+ @Override
+ public void onFailure(final Throwable t) {
+ LOG.trace("Skipping notification for encountered source {}, fetching source failed", id, t);
+ }
+ });
+
+ return fetchSourceFuture;
}
private synchronized <T extends SchemaSourceRepresentation> void addSource(final PotentialSchemaSource<T> source, final AbstractSchemaSourceRegistration<T> reg) {
- Multimap<Class<? extends SchemaSourceRepresentation>, AbstractSchemaSourceRegistration<?>> m = sources.get(source.getSourceIdentifier());
+ ListMultimap<Class<? extends SchemaSourceRepresentation>, AbstractSchemaSourceRegistration<?>> m = sources.get(source.getSourceIdentifier());
if (m == null) {
- m = HashMultimap.create();
+ m = ArrayListMultimap.create();
sources.put(source.getSourceIdentifier(), m);
}
}
if (m.isEmpty()) {
- sources.remove(m);
+ sources.remove(source.getSourceIdentifier());
}
}
}
@Override
public <T extends SchemaSourceRepresentation> SchemaSourceRegistration<T> registerSchemaSource(final SchemaSourceProvider<? super T> provider, final PotentialSchemaSource<T> source) {
- final AbstractSchemaSourceRegistration<T> ret = new AbstractSchemaSourceRegistration<T>(provider, source) {
+ final PotentialSchemaSource<T> src = source.cachedReference();
+
+ final AbstractSchemaSourceRegistration<T> ret = new AbstractSchemaSourceRegistration<T>(provider, src) {
@Override
protected void removeRegistration() {
- removeSource(source, this);
+ removeSource(src, this);
}
};
- addSource(source, ret);
+ addSource(src, ret);
return ret;
}
}
return ret;
}
+
+ private static class SchemaProviderCostComparator implements Comparator<AbstractSchemaSourceRegistration<?>> {
+ public static final SchemaProviderCostComparator INSTANCE = new SchemaProviderCostComparator();
+
+ @Override
+ public int compare(final AbstractSchemaSourceRegistration<?> o1, final AbstractSchemaSourceRegistration<?> o2) {
+ return o1.getInstance().getCost() - o2.getInstance().getCost();
+ }
+ }
}
Code Review / yangtools.git / blobdiff