/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jackrabbit.rmi.client;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.rmi.RemoteException;
import java.security.AccessControlException;
import javax.jcr.Credentials;
import javax.jcr.Item;
import javax.jcr.Node;
import javax.jcr.Property;
import javax.jcr.Repository;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.UnsupportedRepositoryOperationException;
import javax.jcr.ValueFactory;
import javax.jcr.Workspace;
import javax.jcr.retention.RetentionManager;
import javax.jcr.security.AccessControlManager;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.stream.StreamSource;
import org.apache.jackrabbit.rmi.remote.RemoteSession;
import org.apache.jackrabbit.rmi.value.SerialValueFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* Local adapter for the JCR-RMI
* {@link org.apache.jackrabbit.rmi.remote.RemoteSession RemoteSession}
* interface. This class makes a remote session locally available using
* the JCR {@link javax.jcr.Session Session} interface.
*
* @see javax.jcr.Session
* @see org.apache.jackrabbit.rmi.remote.RemoteSession
*/
public class ClientSession extends ClientObject implements Session {
/**
* Logger instance.
*/
private static final Logger log =
LoggerFactory.getLogger(ClientSession.class);
/** The current repository. */
private final Repository repository;
/**
* Flag indicating whether the session is to be considered live of not.
* This flag is initially set to <code>true</code> and reset to
* <code>false</code> by the {@link #logout()} method. The {@link #isLive()}
* method first checks this flag before asking the remote session.
*/
private boolean live = true;
/** The adapted remote session. */
protected final RemoteSession remote;
/**
* The adapted workspace of this session. This field is set on the first
* call to the {@link #getWorkspace()} method assuming, that a workspace
* instance is not changing during the lifetime of a session, that is,
* each call to the server-side <code>Session.getWorkspace()</code> allways
* returns the same object.
*/
private Workspace workspace;
/**
* Creates a client adapter for the given remote session.
*
* @param repository current repository
* @param remote remote repository
* @param factory local adapter factory
*/
public ClientSession(Repository repository, RemoteSession remote,
LocalAdapterFactory factory) {
super(factory);
this.repository = repository;
this.remote = remote;
}
/**
* Returns the current repository without contacting the remote session.
*
* {@inheritDoc}
*/
public Repository getRepository() {
return repository;
}
/** {@inheritDoc} */
public String getUserID() {
try {
return remote.getUserID();
} catch (RemoteException ex) {
throw new RemoteRuntimeException(ex);
}
}
/** {@inheritDoc} */
public Object getAttribute(String name) {
try {
return remote.getAttribute(name);
} catch (RemoteException ex) {
throw new RemoteRuntimeException(ex);
}
}
/** {@inheritDoc} */
public String[] getAttributeNames() {
try {
return remote.getAttributeNames();
} catch (RemoteException ex) {
throw new RemoteRuntimeException(ex);
}
}
/** {@inheritDoc} */
public Workspace getWorkspace() {
if (workspace == null) {
try {
workspace =
getFactory().getWorkspace(this, remote.getWorkspace());
} catch (RemoteException ex) {
throw new RemoteRuntimeException(ex);
}
}
return workspace;
}
/** {@inheritDoc} */
public Session impersonate(Credentials credentials)
throws RepositoryException {
try {
RemoteSession session = remote.impersonate(credentials);
return getFactory().getSession(repository, session);
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public Node getRootNode() throws RepositoryException {
try {
return getNode(this, remote.getRootNode());
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public Node getNodeByIdentifier(String id) throws RepositoryException {
try {
return getNode(this, remote.getNodeByIdentifier(id));
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public Node getNodeByUUID(String uuid) throws RepositoryException {
try {
return getNode(this, remote.getNodeByUUID(uuid));
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public Item getItem(String path) throws RepositoryException {
try {
return getItem(this, remote.getItem(path));
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public Node getNode(String path) throws RepositoryException {
try {
return getNode(this, remote.getNode(path));
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public Property getProperty(String path) throws RepositoryException {
try {
return (Property) getItem(this, remote.getProperty(path));
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public boolean itemExists(String path) throws RepositoryException {
try {
return remote.itemExists(path);
} catch (RemoteException ex) {
throw new RemoteRuntimeException(ex);
}
}
/** {@inheritDoc} */
public boolean nodeExists(String path) throws RepositoryException {
try {
return remote.nodeExists(path);
} catch (RemoteException ex) {
throw new RemoteRuntimeException(ex);
}
}
/** {@inheritDoc} */
public boolean propertyExists(String path) throws RepositoryException {
try {
return remote.propertyExists(path);
} catch (RemoteException ex) {
throw new RemoteRuntimeException(ex);
}
}
/** {@inheritDoc} */
public void removeItem(String path) throws RepositoryException {
try {
remote.removeItem(path);
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public void move(String from, String to) throws RepositoryException {
try {
remote.move(from, to);
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public void save() throws RepositoryException {
try {
remote.save();
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public void refresh(boolean keepChanges) throws RepositoryException {
try {
remote.refresh(keepChanges);
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public boolean hasPendingChanges() throws RepositoryException {
try {
return remote.hasPendingChanges();
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/**
* Returns the {@link SerialValueFactory#getInstance()}.
*
* {@inheritDoc}
*/
public ValueFactory getValueFactory() {
return SerialValueFactory.getInstance();
}
/** {@inheritDoc} */
public void checkPermission(String path, String actions)
throws AccessControlException, RepositoryException {
if (!hasPermission(path, actions)) {
throw new AccessControlException(
"No permission for " + actions + " on " + path);
}
}
/** {@inheritDoc} */
public boolean hasPermission(String path, String actions)
throws RepositoryException {
try {
return remote.hasPermission(path, actions);
} catch (RemoteException ex) {
throw new RemoteRuntimeException(ex);
}
}
/** {@inheritDoc} */
public void importXML(String path, InputStream xml, int mode)
throws IOException, RepositoryException {
try {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
byte[] bytes = new byte[4096];
for (int n = xml.read(bytes); n != -1; n = xml.read(bytes)) {
buffer.write(bytes, 0, n);
}
remote.importXML(path, buffer.toByteArray(), mode);
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public ContentHandler getImportContentHandler(
final String path, final int mode) throws RepositoryException {
getItem(path); // Check that the path exists
try {
final ByteArrayOutputStream buffer = new ByteArrayOutputStream();
ContentHandler handler =
SerializingContentHandler.getSerializer(buffer);
return new DefaultContentHandler(handler) {
public void endDocument() throws SAXException {
super.endDocument();
try {
remote.importXML(path, buffer.toByteArray(), mode);
} catch (Exception e) {
throw new SAXException("XML import failed", e);
}
}
};
} catch (SAXException e) {
throw new RepositoryException("XML serialization failed", e);
}
}
/** {@inheritDoc} */
public void setNamespacePrefix(String prefix, String uri)
throws RepositoryException {
try {
remote.setNamespacePrefix(prefix, uri);
} catch (RemoteException ex) {
throw new RemoteRuntimeException(ex);
}
}
/** {@inheritDoc} */
public String[] getNamespacePrefixes() throws RepositoryException {
try {
return remote.getNamespacePrefixes();
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public String getNamespaceURI(String prefix) throws RepositoryException {
try {
return remote.getNamespaceURI(prefix);
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public String getNamespacePrefix(String uri) throws RepositoryException {
try {
return remote.getNamespacePrefix(uri);
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/** {@inheritDoc} */
public void logout() {
// ignore if we are not alive any more.
if (!isLive()) {
return;
}
try {
remote.logout();
} catch (RemoteException ex) {
// JCRRMI-3: Just log a warning, the connection is dead anyway
log.warn("Remote logout failed", ex);
} finally {
// mark "dead"
live = false;
}
}
/** {@inheritDoc} */
public void addLockToken(String name) {
try {
remote.addLockToken(name);
} catch (RemoteException ex) {
throw new RemoteRuntimeException(ex);
}
}
/** {@inheritDoc} */
public String[] getLockTokens() {
try {
return remote.getLockTokens();
} catch (RemoteException ex) {
throw new RemoteRuntimeException(ex);
}
}
/** {@inheritDoc} */
public void removeLockToken(String name) {
try {
remote.removeLockToken(name);
} catch (RemoteException ex) {
throw new RemoteRuntimeException(ex);
}
}
/**
* Exports the XML system view of the specified repository location
* to the given XML content handler. This method first requests the
* raw XML data from the remote session, and then uses an identity
* transformation to feed the data to the given XML content handler.
* Possible IO and transformer exceptions are thrown as SAXExceptions.
*
* {@inheritDoc}
*/
public void exportSystemView(
String path, ContentHandler handler,
boolean binaryAsLink, boolean noRecurse)
throws SAXException, RepositoryException {
try {
byte[] xml = remote.exportSystemView(path, binaryAsLink, noRecurse);
Source source = new StreamSource(new ByteArrayInputStream(xml));
Result result = new SAXResult(handler);
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer();
transformer.transform(source, result);
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
} catch (IOException ex) {
throw new SAXException(ex);
} catch (TransformerConfigurationException ex) {
throw new SAXException(ex);
} catch (TransformerException ex) {
throw new SAXException(ex);
}
}
/**
* Exports the XML system view of the specified repository location
* to the given output stream. This method first requests the
* raw XML data from the remote session, and then writes the data to
* the output stream.
*
* {@inheritDoc}
*/
public void exportSystemView(
String path, OutputStream output,
boolean binaryAsLink, boolean noRecurse)
throws IOException, RepositoryException {
try {
byte[] xml = remote.exportSystemView(path, binaryAsLink, noRecurse);
output.write(xml);
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/**
* Exports the XML document view of the specified repository location
* to the given XML content handler. This method first requests the
* raw XML data from the remote session, and then uses an identity
* transformation to feed the data to the given XML content handler.
* Possible IO and transformer exceptions are thrown as SAXExceptions.
*
* {@inheritDoc}
*/
public void exportDocumentView(
String path, ContentHandler handler,
boolean binaryAsLink, boolean noRecurse)
throws SAXException, RepositoryException {
try {
byte[] xml = remote.exportDocumentView(path, binaryAsLink, noRecurse);
Source source = new StreamSource(new ByteArrayInputStream(xml));
Result result = new SAXResult(handler);
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer();
transformer.transform(source, result);
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
} catch (IOException ex) {
throw new SAXException(ex);
} catch (TransformerConfigurationException ex) {
throw new SAXException(ex);
} catch (TransformerException ex) {
throw new SAXException(ex);
}
}
/**
* Exports the XML document view of the specified repository location
* to the given output stream. This method first requests the
* raw XML data from the remote session, and then writes the data to
* the output stream.
*
* {@inheritDoc}
*/
public void exportDocumentView(
String path, OutputStream output,
boolean binaryAsLink, boolean noRecurse)
throws IOException, RepositoryException {
try {
byte[] xml = remote.exportDocumentView(path, binaryAsLink, noRecurse);
output.write(xml);
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
/**
* {@inheritDoc}
*/
public boolean isLive() {
try {
return live && remote.isLive();
} catch (RemoteException e) {
log.warn("Failed to test remote session state", e);
return false;
}
}
public AccessControlManager getAccessControlManager()
throws UnsupportedRepositoryOperationException, RepositoryException {
try {
return getFactory().getAccessControlManager(
remote.getAccessControlManager());
} catch (RemoteException ex) {
throw new RemoteRepositoryException(ex);
}
}
public RetentionManager getRetentionManager()
throws RepositoryException {
throw new UnsupportedRepositoryOperationException("TODO: JCRRMI-26");
}
public boolean hasCapability(
String methodName, Object target, Object[] arguments)
throws RepositoryException {
throw new UnsupportedRepositoryOperationException("TODO: JCRRMI-26");
}
}