import com.google.common.annotations.Beta;
import com.google.common.base.Preconditions;
-import com.google.common.base.Verify;
-import java.util.concurrent.atomic.AtomicLongFieldUpdater;
+import org.opendaylight.controller.cluster.access.client.AbstractClientConnection;
import org.opendaylight.controller.cluster.access.concepts.LocalHistoryIdentifier;
import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
* Client-side view of a local history. This class tracks all state related to a particular history and routes
* frontend requests towards the backend.
*
+ * <p>
* This interface is used by the world outside of the actor system and in the actor system it is manifested via
- * its client actor. That requires some state transfer with {@link DistributedDataStoreClientBehavior}. In order to
+ * its client actor. That requires some state transfer with {@link AbstractDataStoreClientBehavior}. In order to
* reduce request latency, all messages are carbon-copied (and enqueued first) to the client actor.
*
* @author Robert Varga
*/
@Beta
-public final class ClientLocalHistory extends AbstractClientHistory implements AutoCloseable {
-
- private static final AtomicLongFieldUpdater<ClientLocalHistory> NEXT_TX_UPDATER =
- AtomicLongFieldUpdater.newUpdater(ClientLocalHistory.class, "nextTx");
-
- // Used via NEXT_TX_UPDATER
- @SuppressWarnings("unused")
- private volatile long nextTx = 0;
-
- ClientLocalHistory(final DistributedDataStoreClientBehavior client, final LocalHistoryIdentifier historyId) {
+public class ClientLocalHistory extends AbstractClientHistory implements AutoCloseable {
+ ClientLocalHistory(final AbstractDataStoreClientBehavior client, final LocalHistoryIdentifier historyId) {
super(client, historyId);
}
- public ClientTransaction createTransaction() {
+ @Override
+ public void close() {
+ doClose();
+ }
+
+ private State ensureIdleState() {
final State local = state();
Preconditions.checkState(local == State.IDLE, "Local history %s state is %s", this, local);
- updateState(local, State.TX_OPEN);
+ return local;
+ }
- return new ClientTransaction(this, new TransactionIdentifier(getIdentifier(),
- NEXT_TX_UPDATER.getAndIncrement(this)));
+ @Override
+ ClientSnapshot doCreateSnapshot() {
+ ensureIdleState();
+ return new ClientSnapshot(this, new TransactionIdentifier(getIdentifier(), nextTx()));
}
@Override
- public void close() {
- final State local = state();
- if (local != State.CLOSED) {
- Preconditions.checkState(local == State.IDLE, "Local history %s has an open transaction", this);
- updateState(local, State.CLOSED);
+ ClientTransaction doCreateTransaction() {
+ updateState(ensureIdleState(), State.TX_OPEN);
+ return new ClientTransaction(this, new TransactionIdentifier(getIdentifier(), nextTx()));
+ }
+
+ @Override
+ void onTransactionAbort(final AbstractClientHandle<?> snap) {
+ if (snap instanceof ClientTransaction) {
+ final State local = state();
+ if (local == State.TX_OPEN) {
+ updateState(local, State.IDLE);
+ }
}
+
+ super.onTransactionAbort(snap);
}
@Override
- void onTransactionReady(final ClientTransaction transaction) {
+ AbstractTransactionCommitCohort onTransactionReady(final ClientTransaction tx,
+ final AbstractTransactionCommitCohort cohort) {
+
final State local = state();
- Verify.verify(local == State.TX_OPEN, "Local history %s is in unexpected state %s", this, local);
- updateState(local, State.IDLE);
- super.onTransactionReady(transaction);
+ switch (local) {
+ case CLOSED:
+ return super.onTransactionReady(tx, cohort);
+ case IDLE:
+ throw new IllegalStateException(String.format("Local history %s is idle when readying transaction %s",
+ this, tx.getIdentifier()));
+ case TX_OPEN:
+ updateState(local, State.IDLE);
+ return super.onTransactionReady(tx, cohort);
+ default:
+ throw new IllegalStateException(String.format("Local history %s in unhandled state %s", this, local));
+
+ }
+ }
+
+ @Override
+ ProxyHistory createHistoryProxy(final LocalHistoryIdentifier historyId,
+ final AbstractClientConnection<ShardBackendInfo> connection) {
+ return ProxyHistory.createClient(this, connection, historyId);
}
}