BUG-5280: add ClientTransactionCursor

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / databroker / actors / dds / ClientTransaction.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/ClientTransaction.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/ClientTransaction.java
index 334ab71d585d2f4295b8d78b2e5094fff839973e..f0ce2faf085c09bd25a5f89648b8db8f98e92a1c 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/ClientTransaction.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/ClientTransaction.java
@@ -13,8 +13,11 @@ import com.google.common.base.Preconditions;
 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;
@@ -52,11 +55,12 @@ 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);
     }
@@ -65,6 +69,12 @@ public final class ClientTransaction extends AbstractClientHandle<AbstractProxyT
         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);
     }
@@ -107,4 +117,10 @@ public final class ClientTransaction extends AbstractClientHandle<AbstractProxyT
 
         return parent().onTransactionReady(this, cohort);
     }
+
+    void closeCursor(@Nonnull final DOMDataTreeCursor cursor) {
+        if (cursor.equals(this.cursor)) {
+            this.cursor = null;
+        }
+    }
 }