/**
* Creates a relationship with the given id, from the nodes identified by id and of type typeId
*
* @param id The id of the relationship to create.
* @param type The id of the relationship type this relationship will have.
* @param firstNodeId The id of the start node.
* @param secondNodeId The id of the end node.
*/
public void relationshipCreate(
long id, int type, long firstNodeId, long secondNodeId, RecordAccessSet recordChangeSet) {
// TODO could be unnecessary to mark as changed here already, dense nodes may not need to change
NodeRecord firstNode =
recordChangeSet.getNodeRecords().getOrLoad(firstNodeId, null).forChangingLinkage();
if (!firstNode.inUse()) {
throw new IllegalStateException(
"First node[" + firstNodeId + "] is deleted and cannot be used to create a relationship");
}
NodeRecord secondNode =
recordChangeSet.getNodeRecords().getOrLoad(secondNodeId, null).forChangingLinkage();
if (!secondNode.inUse()) {
throw new IllegalStateException(
"Second node["
+ secondNodeId
+ "] is deleted and cannot be used to create a relationship");
}
convertNodeToDenseIfNecessary(
firstNode, recordChangeSet.getRelRecords(), recordChangeSet.getRelGroupRecords());
convertNodeToDenseIfNecessary(
secondNode, recordChangeSet.getRelRecords(), recordChangeSet.getRelGroupRecords());
RelationshipRecord record =
recordChangeSet.getRelRecords().create(id, null).forChangingLinkage();
record.setLinks(firstNodeId, secondNodeId, type);
record.setInUse(true);
record.setCreated();
connectRelationship(
firstNode,
secondNode,
record,
recordChangeSet.getRelRecords(),
recordChangeSet.getRelGroupRecords());
}
@Test
public void shouldReadNodeRecords() throws IOException {
URL nodeStoreFile = getClass().getResource("exampledb/neostore.nodestore.db");
LegacyNodeStoreReader nodeStoreReader =
new LegacyNodeStoreReader(new File(nodeStoreFile.getFile()));
assertEquals(1001, nodeStoreReader.getMaxId());
Iterable<NodeRecord> records = nodeStoreReader.readNodeStore();
int nodeCount = 0;
for (NodeRecord record : records) {
if (record.inUse()) nodeCount++;
}
assertEquals(501, nodeCount);
nodeStoreReader.close();
}
private void migrateNodes(NodeStore nodeStore, PropertyWriter propertyWriter)
throws IOException {
Iterable<NodeRecord> records = legacyStore.getNodeStoreReader().readNodeStore();
// estimate total number of nodes using file size then calc number of dots or percentage
// complete
for (NodeRecord nodeRecord : records) {
reportProgress(nodeRecord.getId());
nodeStore.setHighId(nodeRecord.getId() + 1);
if (nodeRecord.inUse()) {
long startOfPropertyChain = nodeRecord.getNextProp();
if (startOfPropertyChain != Record.NO_NEXT_RELATIONSHIP.intValue()) {
long propertyRecordId = migrateProperties(startOfPropertyChain, propertyWriter);
nodeRecord.setNextProp(propertyRecordId);
}
nodeStore.updateRecord(nodeRecord);
} else {
nodeStore.freeId(nodeRecord.getId());
}
}
legacyStore.getNodeStoreReader().close();
}