*/
package org.opendaylight.controller.cluster.databroker.actors.dds;
-import com.google.common.base.Preconditions;
-import com.google.common.collect.BiMap;
+import static akka.pattern.Patterns.ask;
+import static com.google.common.base.Verify.verifyNotNull;
+
+import akka.dispatch.ExecutionContexts;
+import akka.dispatch.OnComplete;
+import akka.util.Timeout;
import com.google.common.collect.ImmutableBiMap;
-import com.google.common.collect.ImmutableBiMap.Builder;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
-import javax.annotation.concurrent.GuardedBy;
-import javax.annotation.concurrent.ThreadSafe;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Stream;
+import org.checkerframework.checker.lock.qual.GuardedBy;
+import org.eclipse.jdt.annotation.NonNull;
import org.opendaylight.controller.cluster.access.client.BackendInfoResolver;
import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
+import org.opendaylight.controller.cluster.datastore.shardmanager.RegisterForShardAvailabilityChanges;
import org.opendaylight.controller.cluster.datastore.shardstrategy.DefaultShardStrategy;
-import org.opendaylight.controller.cluster.datastore.utils.ActorContext;
+import org.opendaylight.controller.cluster.datastore.utils.ActorUtils;
+import org.opendaylight.yangtools.concepts.Registration;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
+import scala.concurrent.Future;
/**
* {@link BackendInfoResolver} implementation for static shard configuration based on ShardManager. Each string-named
* shard is assigned a single cookie and this mapping is stored in a bidirectional map. Information about corresponding
- * shard leader is resolved via {@link ActorContext}. The product of resolution is {@link ShardBackendInfo}.
+ * shard leader is resolved via {@link ActorUtils}. The product of resolution is {@link ShardBackendInfo}.
+ *
+ * <p>
+ * This class is thread-safe.
*
* @author Robert Varga
*/
-@ThreadSafe
final class ModuleShardBackendResolver extends AbstractShardBackendResolver {
private static final Logger LOG = LoggerFactory.getLogger(ModuleShardBackendResolver.class);
private final ConcurrentMap<Long, ShardState> backends = new ConcurrentHashMap<>();
- private final ActorContext actorContext;
+
+ private final Future<Registration> shardAvailabilityChangesRegFuture;
@GuardedBy("this")
private long nextShard = 1;
- private volatile BiMap<String, Long> shards = ImmutableBiMap.of(DefaultShardStrategy.DEFAULT_SHARD, 0L);
+ private volatile ImmutableBiMap<String, Long> shards = ImmutableBiMap.of(DefaultShardStrategy.DEFAULT_SHARD, 0L);
// FIXME: we really need just ActorContext.findPrimaryShardAsync()
- ModuleShardBackendResolver(final ClientIdentifier clientId, final ActorContext actorContext) {
- super(clientId, actorContext);
- this.actorContext = Preconditions.checkNotNull(actorContext);
+ ModuleShardBackendResolver(final ClientIdentifier clientId, final ActorUtils actorUtils) {
+ super(clientId, actorUtils);
+
+ shardAvailabilityChangesRegFuture = ask(actorUtils.getShardManager(), new RegisterForShardAvailabilityChanges(
+ this::onShardAvailabilityChange), Timeout.apply(60, TimeUnit.MINUTES))
+ .map(reply -> (Registration)reply, ExecutionContexts.global());
+
+ shardAvailabilityChangesRegFuture.onComplete(new OnComplete<Registration>() {
+ @Override
+ public void onComplete(final Throwable failure, final Registration reply) {
+ if (failure != null) {
+ LOG.error("RegisterForShardAvailabilityChanges failed", failure);
+ }
+ }
+ }, ExecutionContexts.global());
}
- Long resolveShardForPath(final YangInstanceIdentifier path) {
- final String shardName = actorContext.getShardStrategyFactory().getStrategy(path).findShard(path);
+ private void onShardAvailabilityChange(final String shardName) {
+ LOG.debug("onShardAvailabilityChange for {}", shardName);
+
Long cookie = shards.get(shardName);
if (cookie == null) {
- synchronized (this) {
- cookie = shards.get(shardName);
- if (cookie == null) {
- cookie = nextShard++;
-
- Builder<String, Long> builder = ImmutableBiMap.builder();
- builder.putAll(shards);
- builder.put(shardName, cookie);
- shards = builder.build();
- }
- }
+ LOG.debug("No shard cookie found for {}", shardName);
+ return;
}
- return cookie;
+ notifyStaleBackendInfoCallbacks(cookie);
}
+ Long resolveShardForPath(final YangInstanceIdentifier path) {
+ return resolveCookie(actorUtils().getShardStrategyFactory().getStrategy(path).findShard(path));
+ }
+
+ Stream<Long> resolveAllShards() {
+ return actorUtils().getConfiguration().getAllShardNames().stream()
+ .sorted()
+ .map(this::resolveCookie);
+ }
+
+ private @NonNull Long resolveCookie(final String shardName) {
+ final Long cookie = shards.get(shardName);
+ return cookie != null ? cookie : populateShard(shardName);
+ }
+
+ private synchronized @NonNull Long populateShard(final String shardName) {
+ Long cookie = shards.get(shardName);
+ if (cookie == null) {
+ cookie = nextShard++;
+ shards = ImmutableBiMap.<String, Long>builder().putAll(shards).put(shardName, cookie).build();
+ }
+ return cookie;
+ }
@Override
public CompletionStage<ShardBackendInfo> getBackendInfo(final Long cookie) {
}
LOG.debug("Invalidating backend information {}", staleInfo);
- flushCache(staleInfo.getShardName());
+ flushCache(staleInfo.getName());
- LOG.trace("Invalidated cache %s", staleInfo);
+ LOG.trace("Invalidated cache {}", staleInfo);
backends.remove(cookie, existing);
}
return getBackendInfo(cookie);
}
+
+ @Override
+ public void close() {
+ shardAvailabilityChangesRegFuture.onComplete(new OnComplete<Registration>() {
+ @Override
+ public void onComplete(final Throwable failure, final Registration reply) {
+ reply.close();
+ }
+ }, ExecutionContexts.global());
+ }
+
+ @Override
+ public String resolveCookieName(final Long cookie) {
+ return verifyNotNull(shards.inverse().get(cookie), "Unexpected null cookie: %s", cookie);
+ }
}
Code Review / controller.git / blobdiff