+++ /dev/null
-/*
- * Copyright (c) 2014 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.md.sal.dom.store.impl.tree.data;
-
-import com.google.common.base.Optional;
-import com.google.common.base.Preconditions;
-import org.opendaylight.controller.md.sal.dom.store.impl.tree.DataTree;
-import org.opendaylight.controller.md.sal.dom.store.impl.tree.DataTreeCandidate;
-import org.opendaylight.controller.md.sal.dom.store.impl.tree.DataTreeModification;
-import org.opendaylight.controller.md.sal.dom.store.impl.tree.DataValidationFailedException;
-import org.opendaylight.controller.md.sal.dom.store.impl.tree.ModificationType;
-import org.opendaylight.controller.md.sal.dom.store.impl.tree.StoreUtils;
-import org.opendaylight.controller.md.sal.dom.store.impl.tree.spi.TreeNode;
-import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
-import org.opendaylight.yangtools.yang.model.api.SchemaContext;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.util.concurrent.locks.ReadWriteLock;
-import java.util.concurrent.locks.ReentrantReadWriteLock;
-
-/**
- * Read-only snapshot of the data tree.
- */
-final class InMemoryDataTree implements DataTree {
- private static final Logger LOG = LoggerFactory.getLogger(InMemoryDataTree.class);
- private static final InstanceIdentifier PUBLIC_ROOT_PATH = InstanceIdentifier.builder().build();
-
- private final ReadWriteLock rwLock = new ReentrantReadWriteLock(true);
- private ModificationApplyOperation applyOper = new AlwaysFailOperation();
- private SchemaContext currentSchemaContext;
- private TreeNode rootNode;
-
- public InMemoryDataTree(final TreeNode rootNode, final SchemaContext schemaContext) {
- this.rootNode = Preconditions.checkNotNull(rootNode);
-
- if (schemaContext != null) {
- // Also sets applyOper
- setSchemaContext(schemaContext);
- }
- }
-
- @Override
- public synchronized void setSchemaContext(final SchemaContext newSchemaContext) {
- Preconditions.checkNotNull(newSchemaContext);
-
- LOG.info("Attepting to install schema context {}", newSchemaContext);
-
- /*
- * FIXME: we should walk the schema contexts, both current and new and see
- * whether they are compatible here. Reject incompatible changes.
- */
-
- // Instantiate new apply operation, this still may fail
- final ModificationApplyOperation newApplyOper = SchemaAwareApplyOperation.from(newSchemaContext);
-
- // Ready to change the context now, make sure no operations are running
- rwLock.writeLock().lock();
- try {
- this.applyOper = newApplyOper;
- this.currentSchemaContext = newSchemaContext;
- } finally {
- rwLock.writeLock().unlock();
- }
- }
-
- @Override
- public InMemoryDataTreeSnapshot takeSnapshot() {
- rwLock.readLock().lock();
- try {
- return new InMemoryDataTreeSnapshot(currentSchemaContext, rootNode, applyOper);
- } finally {
- rwLock.readLock().unlock();
- }
- }
-
- @Override
- public void validate(final DataTreeModification modification) throws DataValidationFailedException {
- Preconditions.checkArgument(modification instanceof InMemoryDataTreeModification, "Invalid modification class %s", modification.getClass());
-
- final InMemoryDataTreeModification m = (InMemoryDataTreeModification)modification;
- m.getStrategy().checkApplicable(PUBLIC_ROOT_PATH, m.getRootModification(), Optional.<TreeNode>of(rootNode));
- }
-
- @Override
- public synchronized DataTreeCandidate prepare(final DataTreeModification modification) {
- Preconditions.checkArgument(modification instanceof InMemoryDataTreeModification, "Invalid modification class %s", modification.getClass());
-
- final InMemoryDataTreeModification m = (InMemoryDataTreeModification)modification;
- final ModifiedNode root = m.getRootModification();
-
- if (root.getType() == ModificationType.UNMODIFIED) {
- return new NoopDataTreeCandidate(PUBLIC_ROOT_PATH, root);
- }
-
- rwLock.writeLock().lock();
- try {
- final Optional<TreeNode> newRoot = m.getStrategy().apply(m.getRootModification(),
- Optional.<TreeNode>of(rootNode), rootNode.getSubtreeVersion().next());
- Preconditions.checkState(newRoot.isPresent(), "Apply strategy failed to produce root node");
- return new InMemoryDataTreeCandidate(PUBLIC_ROOT_PATH, root, rootNode, newRoot.get());
- } finally {
- rwLock.writeLock().unlock();
- }
- }
-
- @Override
- public synchronized void commit(final DataTreeCandidate candidate) {
- if (candidate instanceof NoopDataTreeCandidate) {
- return;
- }
-
- Preconditions.checkArgument(candidate instanceof InMemoryDataTreeCandidate, "Invalid candidate class %s", candidate.getClass());
- final InMemoryDataTreeCandidate c = (InMemoryDataTreeCandidate)candidate;
-
- LOG.debug("Updating datastore from {} to {}", rootNode, c.getAfterRoot());
-
- if (LOG.isTraceEnabled()) {
- LOG.trace("Data Tree is {}", StoreUtils.toStringTree(c.getAfterRoot().getData()));
- }
-
- // Ready to change the context now, make sure no operations are running
- rwLock.writeLock().lock();
- try {
- Preconditions.checkState(c.getBeforeRoot() == rootNode,
- String.format("Store tree %s and candidate base %s differ.", rootNode, c.getBeforeRoot()));
- this.rootNode = c.getAfterRoot();
- } finally {
- rwLock.writeLock().unlock();
- }
- }
-}
Code Review / controller.git / blobdiff