import com.google.common.collect.Iterables;
import com.google.common.util.concurrent.CheckedFuture;
import java.util.Collection;
+import javax.annotation.Nonnull;
import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
import org.opendaylight.mdsal.common.api.ReadFailedException;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeCursor;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteCursor;
import org.opendaylight.mdsal.dom.spi.store.DOMStoreThreePhaseCommitCohort;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
@Beta
public final class ClientTransaction extends AbstractClientHandle<AbstractProxyTransaction> {
+ private ClientTransactionCursor cursor;
+
ClientTransaction(final AbstractClientHistory parent, final TransactionIdentifier transactionId) {
super(parent, transactionId);
}
-
private AbstractProxyTransaction createProxy(final Long shard) {
return parent().createTransactionProxy(getIdentifier(), shard);
}
return ensureProxy(path, this::createProxy);
}
+ public DOMDataTreeWriteCursor openCursor() {
+ Preconditions.checkState(cursor == null, "Transaction %s has open cursor", getIdentifier());
+ cursor = new ClientTransactionCursor(this);
+ return cursor;
+ }
+
public CheckedFuture<Boolean, ReadFailedException> exists(final YangInstanceIdentifier path) {
return ensureTransactionProxy(path).exists(path);
}
return parent().onTransactionReady(this, cohort);
}
+
+ void closeCursor(@Nonnull final DOMDataTreeCursor cursor) {
+ if (cursor.equals(this.cursor)) {
+ this.cursor = null;
+ }
+ }
}
--- /dev/null
+/*
+ * Copyright (c) 2016 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.controller.cluster.databroker.actors.dds;
+
+import com.google.common.base.Preconditions;
+import java.util.Arrays;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteCursor;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+
+/**
+ * A {@link DOMDataTreeWriteCursor} tied to a {@link ClientTransaction}.
+ *
+ * @author Robert Varga
+ */
+final class ClientTransactionCursor implements DOMDataTreeWriteCursor {
+ private YangInstanceIdentifier current = YangInstanceIdentifier.EMPTY;
+ private final ClientTransaction parent;
+
+ ClientTransactionCursor(final ClientTransaction parent) {
+ this.parent = Preconditions.checkNotNull(parent);
+ }
+
+ @Override
+ public void enter(final PathArgument child) {
+ current = current.node(child);
+ }
+
+ @Override
+ public void enter(final PathArgument... path) {
+ enter(Arrays.asList(path));
+ }
+
+ @Override
+ public void enter(final Iterable<PathArgument> path) {
+ path.forEach(this::enter);
+ }
+
+ @Override
+ public void exit() {
+ final YangInstanceIdentifier parent = current.getParent();
+ Preconditions.checkState(parent != null);
+ current = parent;
+ }
+
+ @Override
+ public void exit(final int depth) {
+ for (int i = 0; i < depth; ++i) {
+ exit();
+ }
+ }
+
+ @Override
+ public void close() {
+ parent.closeCursor(this);
+ }
+
+ @Override
+ public void delete(final PathArgument child) {
+ parent.delete(current.node(child));
+ }
+
+ @Override
+ public void merge(final PathArgument child, final NormalizedNode<?, ?> data) {
+ parent.merge(current.node(child), data);
+ }
+
+ @Override
+ public void write(final PathArgument child, final NormalizedNode<?, ?> data) {
+ parent.write(current.node(child), data);
+ }
+}