*/
package org.opendaylight.controller.md.sal.dom.store.impl;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
+import static com.google.common.base.Preconditions.checkNotNull;
+import com.google.common.base.Optional;
+import com.google.common.util.concurrent.CheckedFuture;
+import com.google.common.util.concurrent.Futures;
+import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
-import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
-import com.google.common.base.Optional;
-import com.google.common.util.concurrent.Futures;
-import com.google.common.util.concurrent.ListenableFuture;
-
/**
* Implementation of Read-Write transaction which is backed by {@link DataTreeSnapshot}
* and executed according to {@link TransactionReadyPrototype}.
*
*/
-class SnapshotBackedReadWriteTransaction extends SnapshotBackedWriteTransaction implements
-DOMStoreReadWriteTransaction {
-
+final class SnapshotBackedReadWriteTransaction extends SnapshotBackedWriteTransaction implements DOMStoreReadWriteTransaction {
private static final Logger LOG = LoggerFactory.getLogger(SnapshotBackedReadWriteTransaction.class);
/**
* @param snapshot Snapshot which will be modified.
* @param readyImpl Implementation of ready method.
*/
- protected SnapshotBackedReadWriteTransaction(final Object identifier, final DataTreeSnapshot snapshot,
- final TransactionReadyPrototype store) {
- super(identifier, snapshot, store);
+ protected SnapshotBackedReadWriteTransaction(final Object identifier, final boolean debug,
+ final DataTreeSnapshot snapshot, final TransactionReadyPrototype store) {
+ super(identifier, debug, snapshot, store);
}
@Override
- public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(final InstanceIdentifier path) {
+ public CheckedFuture<Optional<NormalizedNode<?,?>>, ReadFailedException> read(final YangInstanceIdentifier path) {
LOG.debug("Tx: {} Read: {}", getIdentifier(), path);
+ checkNotNull(path, "Path must not be null.");
+
+ final Optional<NormalizedNode<?, ?>> result;
try {
- return Futures.immediateFuture(getMutatedView().readNode(path));
+ result = readSnapshotNode(path);
} catch (Exception e) {
LOG.error("Tx: {} Failed Read of {}", getIdentifier(), path, e);
- throw e;
+ return Futures.immediateFailedCheckedFuture(new ReadFailedException("Read failed", e));
+ }
+
+ if (result == null) {
+ return Futures.immediateFailedCheckedFuture(new ReadFailedException("Transaction is closed"));
+ } else {
+ return Futures.immediateCheckedFuture(result);
+ }
+ }
+
+ @Override
+ public CheckedFuture<Boolean, ReadFailedException> exists(final YangInstanceIdentifier path) {
+ try {
+ return Futures.immediateCheckedFuture(
+ read(path).checkedGet().isPresent());
+ } catch (ReadFailedException e) {
+ return Futures.immediateFailedCheckedFuture(e);
}
}
-}
\ No newline at end of file
+}