+/*
+ * Copyright (c) 2017 Brocade Communications 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.clustering.it.provider;
+
+import com.google.common.base.Optional;
+import com.google.common.base.Verify;
+import com.google.common.util.concurrent.CheckedFuture;
+import com.google.common.util.concurrent.Futures;
+import org.opendaylight.mdsal.common.api.DataValidationFailedException;
+import org.opendaylight.mdsal.common.api.PostCanCommitStep;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeCandidate;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeCommitCohort;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.sal.clustering.it.car.rev140818.Cars;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
+import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
+import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Example implementation of a DOMDataTreeCommitCohort that validates car entry data.
+ *
+ * @author Thomas Pantelis
+ */
+public class CarEntryDataTreeCommitCohort implements DOMDataTreeCommitCohort {
+ private static final Logger LOG = LoggerFactory.getLogger(CarEntryDataTreeCommitCohort.class);
+
+ private static final QName YEAR_QNAME = QName.create(Cars.QNAME, "year").intern();
+ private static final NodeIdentifier YEAR_NODE_ID = new NodeIdentifier(YEAR_QNAME);
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public CheckedFuture<PostCanCommitStep, DataValidationFailedException> canCommit(Object txId,
+ DOMDataTreeCandidate candidate, SchemaContext ctx) {
+
+ // Simple data validation - verify the year, if present, is >= 1990
+
+ final DataTreeCandidateNode rootNode = candidate.getRootNode();
+ final Optional<NormalizedNode<?, ?>> dataAfter = rootNode.getDataAfter();
+
+ LOG.info("In canCommit: modificationType: {}, dataBefore: {}, dataAfter: {}", rootNode.getModificationType(),
+ rootNode.getDataBefore(), dataAfter);
+
+ // Note: we don't want to process DELETE modifications but we don't need to explicitly check the
+ // ModificationType because dataAfter will not be present. Also dataAfter *should* always contain a
+ // MapEntryNode but we verify anyway.
+ if (dataAfter.isPresent()) {
+ final NormalizedNode<?, ?> normalizedNode = dataAfter.get();
+ Verify.verify(normalizedNode instanceof DataContainerNode, "Expected type DataContainerNode, actual was %s",
+ normalizedNode.getClass());
+ DataContainerNode<?> entryNode = (DataContainerNode<?>) normalizedNode;
+ final Optional<DataContainerChild<? extends PathArgument, ?>> possibleYear =
+ entryNode.getChild(YEAR_NODE_ID);
+ if (possibleYear.isPresent()) {
+ final Number year = (Number) possibleYear.get().getValue();
+
+ LOG.info("year is {}", year);
+
+ if (!(year.longValue() >= 1990)) {
+ return Futures.immediateFailedCheckedFuture(new DataValidationFailedException(
+ DOMDataTreeIdentifier.class, candidate.getRootPath(),
+ String.format("Invalid year %d - year must be >= 1990", year)));
+ }
+ }
+ }
+
+ // Return the noop PostCanCommitStep as we're only validating input data and not participating in the
+ // remaining 3PC stages (pre-commit and commit).
+ return (CheckedFuture<PostCanCommitStep, DataValidationFailedException>) PostCanCommitStep.NOOP_SUCCESS_FUTURE;
+ }
+}