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Blueprints property graph implementation for the DEX graph database
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package com.tinkerpop.blueprints.impls.dex;
import com.sparsity.dex.gdb.AttributeKind;
import com.sparsity.dex.gdb.ObjectType;
import com.tinkerpop.blueprints.CloseableIterable;
import com.tinkerpop.blueprints.Edge;
import com.tinkerpop.blueprints.Element;
import com.tinkerpop.blueprints.Features;
import com.tinkerpop.blueprints.GraphQuery;
import com.tinkerpop.blueprints.KeyIndexableGraph;
import com.tinkerpop.blueprints.MetaGraph;
import com.tinkerpop.blueprints.Parameter;
import com.tinkerpop.blueprints.TransactionalGraph;
import com.tinkerpop.blueprints.Vertex;
import com.tinkerpop.blueprints.util.DefaultGraphQuery;
import com.tinkerpop.blueprints.util.ExceptionFactory;
import com.tinkerpop.blueprints.util.MultiIterable;
import com.tinkerpop.blueprints.util.PropertyFilteredIterable;
import com.tinkerpop.blueprints.util.StringFactory;
import org.apache.commons.configuration.Configuration;
import java.io.File;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* Dex is a graph database developed by Sparsity Technologies.
*
* Dex natively supports the property graph data model defined by Blueprints.
* However, there are a few peculiarities. No user defined element identifiers:
* Dex is the gatekeeper and creator of vertex and edge identifiers. Thus, when
* creating a new vertex or edge instance, the provided object identifier is
* ignored.
*
* Vertices are labeled too: When adding vertices, the user can set
* {@link DexGraph#label} to be used as the label of the vertex to be created.
* Also, the label of a vertex (or even an element) can be retrieved through the
* {@link StringFactory#LABEL} property.
*
* DexGraph implements {@link KeyIndexableGraph} with some particularities on
* the way it can be used. As both vertices and edges are labeled when working
* with Dex, the use of some APIs may require previously setting the label (by
* means of {@link DexGraph#label}). Those APIs are:
* {@link #getVertices(String, Object)}, {@link #getEdges(String, Object)}, and
* {@link #createKeyIndex(String, Class)}.
*
* When working with DexGraph, all methods having as a result a collection
* actually return a {@link CloseableIterable} collection. Thus users can
* {@link CloseableIterable#close()} the collection to free resources.
* Otherwise, all those collections will automatically be closed when the
* transaction is stopped ({@link #stopTransaction(com.tinkerpop.blueprints.TransactionalGraph.Conclusion)}
* or if the database is stopped ( {@link #shutdown()}).
*
* @author Sparsity
* Technologies
*/
public class DexGraph implements MetaGraph, KeyIndexableGraph, TransactionalGraph {
/**
* Default Vertex label.
*/
public static final String DEFAULT_DEX_VERTEX_LABEL = "VERTEX_LABEL";
/**
* This is a "bypass" to set the Dex vertex label (node type).
*
* Dex vertices belong to a vertex/node type (thus all of them have a label).
* By default, all vertices will have the {@link #DEFAULT_DEX_VERTEX_LABEL} label.
* The user may set a different vertex label by setting this property when calling
* {@link #addVertex(Object)}.
*
* Moreover, this value will also be used for the KeyIndex-related methods.
*
* @see #addVertex(Object)
* @see #createKeyIndex(String, Class)
* @see #getVertices(String, Object)
* @see #getEdges(String, Object)
*/
public ThreadLocal label = new ThreadLocal() {
@Override
protected String initialValue() {
return null;
}
};
/**
* Database persistent file.
*/
private File dbFile = null;
private com.sparsity.dex.gdb.Dex dex = null;
private com.sparsity.dex.gdb.Database db = null;
private class Metadata {
com.sparsity.dex.gdb.Session session = null;
List> collection = null;
}
;
private ThreadLocal sessionData = new ThreadLocal() {
@Override
protected Metadata initialValue() {
return new Metadata();
}
};
private static final Features FEATURES = new Features();
static {
FEATURES.supportsDuplicateEdges = true;
FEATURES.supportsSelfLoops = true;
FEATURES.isPersistent = true;
FEATURES.supportsVertexIteration = true;
FEATURES.supportsEdgeIteration = true;
FEATURES.supportsVertexIndex = false;
FEATURES.supportsEdgeIndex = false;
FEATURES.ignoresSuppliedIds = true;
FEATURES.supportsEdgeRetrieval = true;
FEATURES.supportsVertexProperties = true;
FEATURES.supportsEdgeProperties = true;
FEATURES.supportsTransactions = false;
FEATURES.supportsIndices = false;
FEATURES.supportsSerializableObjectProperty = false;
FEATURES.supportsBooleanProperty = true;
FEATURES.supportsDoubleProperty = true;
FEATURES.supportsFloatProperty = true;
FEATURES.supportsIntegerProperty = true;
FEATURES.supportsPrimitiveArrayProperty = false;
FEATURES.supportsUniformListProperty = false;
FEATURES.supportsMixedListProperty = false;
FEATURES.supportsLongProperty = true;
FEATURES.supportsMapProperty = false;
FEATURES.supportsStringProperty = true;
FEATURES.isWrapper = false;
FEATURES.supportsKeyIndices = true;
FEATURES.supportsVertexKeyIndex = true;
FEATURES.supportsEdgeKeyIndex = true;
FEATURES.supportsThreadedTransactions = false;
}
/**
* Gets the Dex raw graph.
*
* @return Dex raw graph.
*/
public com.sparsity.dex.gdb.Graph getRawGraph() {
com.sparsity.dex.gdb.Session sess = getRawSession(false);
if (sess == null) {
throw new IllegalStateException("Transaction has not been started");
}
return sess.getGraph();
}
/**
* Gets the Dex Session
*
* @return The Dex Session
*/
com.sparsity.dex.gdb.Session getRawSession() {
return getRawSession(true);
}
/**
* Gets the Dex Session
*
* @return The Dex Session
*/
com.sparsity.dex.gdb.Session getRawSession(boolean exception) {
com.sparsity.dex.gdb.Session sess = sessionData.get().session;
if (sess == null && exception) {
throw new IllegalStateException("Transaction has not been started");
}
return sess;
}
/**
* Registers a collection.
*
* @param col Collection to be registered.
*/
protected void register(final DexIterable col) {
if (sessionData.get().collection == null) {
sessionData.get().collection = new ArrayList>();
}
sessionData.get().collection.add(col);
//System.out.println("> register " + sess + ":" + col);
}
/**
* Unregisters a collection.
*
* @param col Collection to be unregistered
*/
protected void unregister(final DexIterable col) {
if (sessionData.get().collection == null) {
throw new IllegalStateException("Session with no collections");
}
sessionData.get().collection.remove(col);
//System.out.println("< unregister " + sess + ":" + col);
}
/**
* Creates a new instance.
*
* @param fileName Database persistent file.
*/
public DexGraph(final String fileName) {
this(fileName, null);
}
/**
* Creates a new instance.
*
* @param fileName Database persistent file.
* @param config Dex configuration file.
*/
public DexGraph(final String fileName, final String config) {
try {
this.dbFile = new File(fileName);
final File dbPath = dbFile.getParentFile();
if (!dbPath.exists()) {
if (!dbPath.mkdirs()) {
throw new RuntimeException("Could not create directory");
}
}
final boolean create = !dbFile.exists();
if (config != null) com.sparsity.dex.gdb.DexProperties.load(config);
dex = new com.sparsity.dex.gdb.Dex(new com.sparsity.dex.gdb.DexConfig());
db = (create ? dex.create(dbFile.getPath(), dbFile.getName()) : dex.open(dbFile.getPath(), false));
} catch (Exception e) {
throw new RuntimeException(e.getMessage(), e);
}
}
public DexGraph(final Configuration configuration) {
this(configuration.getString("blueprints.dex.directory", null), configuration.getString("blueprints.dex.config", null));
}
/**
* Creates a new Vertex.
*
* Given identifier is ignored.
*
* Use {@link #label} to specify the label for the new Vertex.
* If no label is given, {@value #DEFAULT_DEX_VERTEX_LABEL} will be used.
*
* @param id It is ignored.
* @return Added Vertex.
* @see com.tinkerpop.blueprints.Graph#addVertex(java.lang.Object)
* @see #label
*/
@Override
public Vertex addVertex(final Object id) {
autoStartTransaction();
String label = this.label.get() == null ? DEFAULT_DEX_VERTEX_LABEL : this.label.get();
com.sparsity.dex.gdb.Graph rawGraph = getRawGraph();
int type = rawGraph.findType(label);
if (type == com.sparsity.dex.gdb.Type.InvalidType) {
// First instance of this type, let's create it
type = rawGraph.newNodeType(label);
}
assert type != com.sparsity.dex.gdb.Type.InvalidType;
// create object instance
long oid = rawGraph.newNode(type);
return new DexVertex(this, oid);
}
/*
* (non-Javadoc)
*
* @see com.tinkerpop.blueprints.Graph#getVertex(java.lang.Object)
*/
@Override
public Vertex getVertex(final Object id) {
autoStartTransaction();
if (null == id)
throw ExceptionFactory.vertexIdCanNotBeNull();
try {
final Long longId = Double.valueOf(id.toString()).longValue();
com.sparsity.dex.gdb.Graph rawGraph = getRawGraph();
final int type = rawGraph.getObjectType(longId);
if (type != com.sparsity.dex.gdb.Type.InvalidType)
return new DexVertex(this, longId);
else
return null;
} catch (NumberFormatException e) {
return null;
} catch (RuntimeException re) {
// dex throws a runtime exception => [DEX: 12] Invalid object identifier.
return null;
}
}
/*
* (non-Javadoc)
*
* @see
* com.tinkerpop.blueprints.Graph#removeVertex(com.tinkerpop.blueprints
* .pgm.Vertex)
*/
@Override
public void removeVertex(final Vertex vertex) {
autoStartTransaction();
assert vertex instanceof DexVertex;
getRawGraph().drop((Long) vertex.getId());
}
/*
* (non-Javadoc)
*
* @see com.tinkerpop.blueprints.Graph#getVertices()
*/
@Override
public CloseableIterable getVertices() {
autoStartTransaction();
com.sparsity.dex.gdb.Graph rawGraph = getRawGraph();
com.sparsity.dex.gdb.TypeList tlist = rawGraph.findNodeTypes();
List> vertices = new ArrayList>();
for (Integer type : tlist) {
com.sparsity.dex.gdb.Objects objs = rawGraph.select(type);
vertices.add(new DexIterable(this, objs, Vertex.class));
}
tlist.delete();
tlist = null;
return new MultiIterable(vertices);
}
/**
* Returns an iterable to all the vertices in the graph that have a particular key/value property.
*
* In case key is {@link StringFactory#LABEL}, it returns an iterable of all the vertices having
* the given value as the label (therefore, belonging to the given type).
*
* In case {@link #label} is null, it will return all vertices having a particular
* key/value no matters the type.
* In case {@link #label} is not null, it will return all vertices having a particular
* key/value belonging to the given type.
*
* @see com.tinkerpop.blueprints.Graph#getVertices(String, Object)
* @see #label
*/
@Override
public CloseableIterable getVertices(final String key, final Object value) {
autoStartTransaction();
com.sparsity.dex.gdb.Graph rawGraph = getRawGraph();
if (key.compareTo(StringFactory.LABEL) == 0) { // label is "indexed"
int type = rawGraph.findType(value.toString());
if (type != com.sparsity.dex.gdb.Type.InvalidType) {
com.sparsity.dex.gdb.Type tdata = rawGraph.getType(type);
if (tdata.getObjectType() == ObjectType.Node) {
com.sparsity.dex.gdb.Objects objs = rawGraph.select(type);
return new DexIterable(this, objs, Vertex.class);
}
}
return null;
}
String label = this.label.get();
if (label == null) { // all vertex types
com.sparsity.dex.gdb.TypeList tlist = rawGraph.findNodeTypes();
List> vertices = new ArrayList>();
for (Integer type : tlist) {
int attr = rawGraph.findAttribute(type, key);
if (com.sparsity.dex.gdb.Attribute.InvalidAttribute != attr) {
com.sparsity.dex.gdb.Attribute adata = rawGraph.getAttribute(attr);
if (adata.getKind() == AttributeKind.Basic) { // "table" scan
com.sparsity.dex.gdb.Objects objs = rawGraph.select(type);
vertices.add(new PropertyFilteredIterable(key, value, new DexIterable(this, objs, Vertex.class)));
} else { // use the index
vertices.add(new DexIterable(this, this.rawGet(adata, value), Vertex.class));
}
}
}
tlist.delete();
tlist = null;
if (vertices.size() > 0) return new MultiIterable(vertices);
else throw new IllegalArgumentException("The given attribute '" + key + "' does not exist");
} else { // restricted to a type
int type = rawGraph.findType(label);
if (type == com.sparsity.dex.gdb.Type.InvalidType) {
throw new IllegalArgumentException("Unnexisting vertex label: " + label);
}
com.sparsity.dex.gdb.Type tdata = rawGraph.getType(type);
if (tdata.getObjectType() != com.sparsity.dex.gdb.ObjectType.Node) {
throw new IllegalArgumentException("Given label is not a vertex label: " + label);
}
int attr = rawGraph.findAttribute(type, key);
if (com.sparsity.dex.gdb.Attribute.InvalidAttribute == attr) {
throw new IllegalArgumentException("The given attribute '" + key
+ "' does not exist for the given node label '" + label + "'");
}
com.sparsity.dex.gdb.Attribute adata = rawGraph.getAttribute(attr);
if (adata.getKind() == AttributeKind.Basic) { // "table" scan
com.sparsity.dex.gdb.Objects objs = rawGraph.select(type);
return new PropertyFilteredIterable(key, value, new DexIterable(this, objs, Vertex.class));
} else { // use the index
return new DexIterable(this, this.rawGet(adata, value), Vertex.class);
}
}
}
/*
* (non-Javadoc)
*
* @see com.tinkerpop.blueprints.Graph#addEdge(java.lang.Object,
* com.tinkerpop.blueprints.Vertex, com.tinkerpop.blueprints.Vertex,
* java.lang.String)
*/
@Override
public Edge addEdge(final Object id, final Vertex outVertex, final Vertex inVertex, final String label) {
if (label == null)
throw ExceptionFactory.edgeLabelCanNotBeNull();
autoStartTransaction();
com.sparsity.dex.gdb.Graph rawGraph = getRawGraph();
int type = rawGraph.findType(label);
if (type == com.sparsity.dex.gdb.Type.InvalidType) {
// First instance of this type, let's create it
type = rawGraph.newEdgeType(label, true, true);
}
assert type != com.sparsity.dex.gdb.Type.InvalidType;
// create object instance
assert outVertex instanceof DexVertex && inVertex instanceof DexVertex;
long oid = rawGraph.newEdge(type, (Long) outVertex.getId(), (Long) inVertex.getId());
return new DexEdge(this, oid);
}
/*
* (non-Javadoc)
*
* @see com.tinkerpop.blueprints.Graph#getEdge(java.lang.Object)
*/
@Override
public Edge getEdge(final Object id) {
autoStartTransaction();
if (null == id)
throw ExceptionFactory.edgeIdCanNotBeNull();
try {
com.sparsity.dex.gdb.Graph rawGraph = getRawGraph();
Long longId = Double.valueOf(id.toString()).longValue();
int type = rawGraph.getObjectType(longId);
if (type != com.sparsity.dex.gdb.Type.InvalidType)
return new DexEdge(this, longId);
else
return null;
} catch (NumberFormatException e) {
return null;
} catch (RuntimeException re) {
// dex throws an runtime exception => [DEX: 12] Invalid object identifier.
return null;
}
}
/*
* (non-Javadoc)
*
* @see
* com.tinkerpop.blueprints.Graph#removeEdge(com.tinkerpop.blueprints
* .pgm.Edge)
*/
@Override
public void removeEdge(final Edge edge) {
autoStartTransaction();
assert edge instanceof DexEdge;
getRawGraph().drop((Long) edge.getId());
}
/*
* (non-Javadoc)
*
* @see com.tinkerpop.blueprints.Graph#getEdges()
*/
@Override
public CloseableIterable getEdges() {
autoStartTransaction();
com.sparsity.dex.gdb.Graph rawGraph = getRawGraph();
com.sparsity.dex.gdb.TypeList tlist = rawGraph.findEdgeTypes();
List> edges = new ArrayList>();
for (Integer type : tlist) {
com.sparsity.dex.gdb.Objects objs = rawGraph.select(type);
edges.add(new DexIterable(this, objs, Edge.class));
}
tlist.delete();
tlist = null;
return new MultiIterable(edges);
}
/**
* Returns an iterable to all the edges in the graph that have a particular key/value property.
*
* In case key is {@link StringFactory#LABEL}, it returns an iterable of all the edges having
* the given value as the label (therefore, belonging to the given type).
*
* In case {@link #label} is null, it will return all edges having a particular
* key/value no matters the type.
* In case {@link #label} is not null, it will return all edges having a particular
* key/value belonging to the given type.
*
* @see com.tinkerpop.blueprints.Graph#getEdges(String, Object)
* @see #label
*/
@Override
public CloseableIterable getEdges(final String key, final Object value) {
autoStartTransaction();
com.sparsity.dex.gdb.Graph rawGraph = getRawGraph();
if (key.compareTo(StringFactory.LABEL) == 0) { // label is "indexed"
int type = rawGraph.findType(value.toString());
if (type != com.sparsity.dex.gdb.Type.InvalidType) {
com.sparsity.dex.gdb.Type tdata = rawGraph.getType(type);
if (tdata.getObjectType() == ObjectType.Edge) {
com.sparsity.dex.gdb.Objects objs = rawGraph.select(type);
return new DexIterable(this, objs, Edge.class);
}
}
return null;
}
String label = this.label.get();
if (label == null) { // all vertex types
com.sparsity.dex.gdb.TypeList tlist = rawGraph.findEdgeTypes();
List> edges = new ArrayList>();
for (Integer type : tlist) {
int attr = rawGraph.findAttribute(type, key);
if (com.sparsity.dex.gdb.Attribute.InvalidAttribute != attr) {
com.sparsity.dex.gdb.Attribute adata = rawGraph.getAttribute(attr);
if (adata.getKind() == AttributeKind.Basic) { // "table" scan
com.sparsity.dex.gdb.Objects objs = rawGraph.select(type);
edges.add(new PropertyFilteredIterable(key, value, new DexIterable(this, objs, Edge.class)));
} else { // use the index
edges.add(new DexIterable(this, this.rawGet(adata, value), Edge.class));
}
}
}
tlist.delete();
tlist = null;
if (edges.size() > 0) return new MultiIterable(edges);
else throw new IllegalArgumentException("The given attribute '" + key + "' does not exist");
} else { // restricted to a type
int type = rawGraph.findType(label);
if (type == com.sparsity.dex.gdb.Type.InvalidType) {
throw new IllegalArgumentException("Unnexisting edge label: " + label);
}
com.sparsity.dex.gdb.Type tdata = rawGraph.getType(type);
if (tdata.getObjectType() != com.sparsity.dex.gdb.ObjectType.Edge) {
throw new IllegalArgumentException("Given label is not a edge label: " + label);
}
int attr = rawGraph.findAttribute(type, key);
if (com.sparsity.dex.gdb.Attribute.InvalidAttribute == attr) {
throw new IllegalArgumentException("The given attribute '" + key
+ "' does not exist for the given edge label '" + label + "'");
}
com.sparsity.dex.gdb.Attribute adata = rawGraph.getAttribute(attr);
if (adata.getKind() == AttributeKind.Basic) { // "table" scan
com.sparsity.dex.gdb.Objects objs = rawGraph.select(type);
return new PropertyFilteredIterable(key, value, new DexIterable(this, objs, Edge.class));
} else { // use the index
return new DexIterable(this, this.rawGet(adata, value), Edge.class);
}
}
}
/**
* Closes all non-closed iterables.
*/
protected void closeAllSessionCollections() {
if (sessionData.get().collection != null) {
for (DexIterable elem : sessionData.get().collection) {
elem.close(false);
}
sessionData.get().collection.clear();
}
}
/*
* (non-Javadoc)
*
* @see com.tinkerpop.blueprints.Graph#shutdown()
*/
@Override
public void shutdown() {
commit();
db.close();
dex.close();
}
@Override
public String toString() {
return StringFactory.graphString(this, dbFile.getPath());
}
public Features getFeatures() {
return FEATURES;
}
private com.sparsity.dex.gdb.Objects rawGet(final com.sparsity.dex.gdb.Attribute adata, final Object value) {
com.sparsity.dex.gdb.Value v = new com.sparsity.dex.gdb.Value();
switch (adata.getDataType()) {
case Boolean:
v.setBooleanVoid((Boolean) value);
break;
case Integer:
v.setIntegerVoid((Integer) value);
break;
case Long:
v.setLongVoid((Long) value);
break;
case String:
v.setStringVoid((String) value);
break;
case Double:
if (value instanceof Double) {
v.setDoubleVoid((Double) value);
} else if (value instanceof Float) {
v.setDoubleVoid(((Float) value).doubleValue());
}
break;
default:
throw new UnsupportedOperationException();
}
return this.getRawGraph().select(adata.getId(), com.sparsity.dex.gdb.Condition.Equal, v);
}
@Override
public void dropKeyIndex(String key,
Class elementClass) {
throw new UnsupportedOperationException();
}
/**
* Create an automatic indexing structure for indexing provided key for element class.
*
* Dex attributes are restricted to an specific vertex/edge type. The property
* {@link #label} must be used to specify the vertex/edge label.
*
* The index could be created even before the vertex/edge label
* had been created (that is, there are no instances for the given vertex/edge label).
* If so, this will create the vertex/edge type automatically.
* The same way, if necessary the attribute will be created automatically.
*
* FIXME: In case the attribute is created, this always creates an String
* attribute, could this be set somehow?
*/
@Override
public void createKeyIndex(String key, Class elementClass, final Parameter... indexParameters) {
autoStartTransaction();
String label = this.label.get();
if (label == null) {
throw new IllegalArgumentException("Label must be given");
}
com.sparsity.dex.gdb.Graph rawGraph = getRawGraph();
int type = rawGraph.findType(label);
if (type == com.sparsity.dex.gdb.Type.InvalidType) {
// create the node/edge type
if (Vertex.class.isAssignableFrom(elementClass)) {
type = rawGraph.newNodeType(label);
} else if (Edge.class.isAssignableFrom(elementClass)) {
type = rawGraph.newEdgeType(label, true, true);
} else {
throw ExceptionFactory.classIsNotIndexable(elementClass);
}
} else {
// validate the node/edge type
com.sparsity.dex.gdb.Type tdata = rawGraph.getType(type);
if (tdata.getObjectType() == ObjectType.Node) {
if (!Vertex.class.isAssignableFrom(elementClass)) {
throw new IllegalArgumentException("Given element class '"
+ elementClass.getName()
+ "' is not valid for the given node type '"
+ label + "'");
}
} else if (tdata.getObjectType() == ObjectType.Edge) {
if (!Edge.class.isAssignableFrom(elementClass)) {
throw new IllegalArgumentException("Given element class '"
+ elementClass.getName()
+ "' is not valid for the given edge type '"
+ label + "'");
}
}
}
int attr = rawGraph.findAttribute(type, key);
if (com.sparsity.dex.gdb.Attribute.InvalidAttribute == attr) {
// create the attribute (indexed)
attr = rawGraph.newAttribute(type, key,
com.sparsity.dex.gdb.DataType.String,
com.sparsity.dex.gdb.AttributeKind.Indexed);
} else {
// it already exists, let's indexe it if necessary
com.sparsity.dex.gdb.Attribute adata = rawGraph.getAttribute(attr);
if (adata.getKind() == AttributeKind.Indexed || adata.getKind() == AttributeKind.Unique) {
throw ExceptionFactory.indexAlreadyExists(label + " " + key);
}
rawGraph.indexAttribute(attr,
com.sparsity.dex.gdb.AttributeKind.Indexed);
}
}
@Override
public Set getIndexedKeys(Class elementClass) {
autoStartTransaction();
com.sparsity.dex.gdb.TypeList tlist = null;
com.sparsity.dex.gdb.Graph rawGraph = getRawGraph();
if (Vertex.class.isAssignableFrom(elementClass)) {
tlist = rawGraph.findNodeTypes();
} else if (Edge.class.isAssignableFrom(elementClass)) {
tlist = rawGraph.findEdgeTypes();
} else {
throw ExceptionFactory.classIsNotIndexable(elementClass);
}
Set ret = new HashSet();
for (Integer type : tlist) {
com.sparsity.dex.gdb.AttributeList alist = rawGraph.findAttributes(type);
for (Integer attr : alist) {
com.sparsity.dex.gdb.Attribute adata = rawGraph.getAttribute(attr);
if (adata.getKind() == AttributeKind.Indexed || adata.getKind() == AttributeKind.Unique) {
ret.add(adata.getName());
}
}
alist.delete();
alist = null;
}
tlist.delete();
tlist = null;
return ret;
}
void autoStartTransaction() {
if (sessionData.get().session == null) {
sessionData.get().session = db.newSession();
//System.out.println("> th=" + Thread.currentThread().getId() + " starts tx with sess=" + sess);
} else {
assert !sessionData.get().session.isClosed();
}
}
public void commit() {
if (sessionData.get().session == null) {
// already closed session
return;
}
closeAllSessionCollections();
if (sessionData.get().session != null && !sessionData.get().session.isClosed()) {
sessionData.get().session.close();
}
sessionData.get().session = null;
}
public void rollback() {
throw new UnsupportedOperationException("Rollback is not supported");
}
@Override
public void stopTransaction(Conclusion conclusion) {
if (Conclusion.SUCCESS == conclusion)
commit();
else
rollback();
}
public GraphQuery query() {
return new DefaultGraphQuery(this);
}
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