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/*******************************************************************************
* Copyright (c) 2011, 2012 Wind River 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
*
* Contributors:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.tcf.ui.handler;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.jface.window.Window;
import org.eclipse.osgi.util.NLS;
import org.eclipse.tcf.protocol.Protocol;
import org.eclipse.tcf.te.runtime.persistence.interfaces.IURIPersistenceService;
import org.eclipse.tcf.te.runtime.services.ServiceManager;
import org.eclipse.tcf.te.runtime.statushandler.StatusHandlerUtil;
import org.eclipse.tcf.te.runtime.utils.StatusHelper;
import org.eclipse.tcf.te.tcf.core.peers.Peer;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerNode;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerNodeProperties;
import org.eclipse.tcf.te.tcf.locator.interfaces.services.IPeerModelRefreshService;
import org.eclipse.tcf.te.tcf.locator.interfaces.services.IPeerModelUpdateService;
import org.eclipse.tcf.te.tcf.locator.model.Model;
import org.eclipse.tcf.te.tcf.locator.nodes.PeerRedirector;
import org.eclipse.tcf.te.tcf.ui.dialogs.RedirectPeerSelectionDialog;
import org.eclipse.tcf.te.tcf.ui.help.IContextHelpIds;
import org.eclipse.tcf.te.tcf.ui.nls.Messages;
import org.eclipse.tcf.te.ui.swt.DisplayUtil;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.ui.navigator.CommonNavigator;
/**
* Redirect peer command handler implementation.
*/
public class RedirectHandler extends AbstractHandler {
/* (non-Javadoc)
* @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
*/
@Override
public Object execute(final ExecutionEvent event) throws ExecutionException {
// Determine the peer selected in Target Explorer tree
ISelection selection = HandlerUtil.getCurrentSelection(event);
if (selection instanceof IStructuredSelection && !selection.isEmpty()) {
// Redirect is supporting single selection only
Object candidate = ((IStructuredSelection)selection).getFirstElement();
if (candidate instanceof IPeerNode) {
final IPeerNode peerNode = (IPeerNode)candidate;
// Create the agent selection dialog
RedirectPeerSelectionDialog dialog = new RedirectPeerSelectionDialog(HandlerUtil.getActiveShell(event), null) {
@Override
protected void configureTableViewer(TableViewer viewer) {
Assert.isNotNull(viewer);
List<ViewerFilter> filter = new ArrayList<ViewerFilter>();
if (viewer.getFilters() != null && viewer.getFilters().length > 0) {
filter.addAll(Arrays.asList(viewer.getFilters()));
}
filter.add(new ViewerFilter() {
@Override
public boolean select(Viewer viewer, Object parentElement, Object element) {
if (peerNode.equals(element)) {
return false;
}
return true;
}
});
viewer.setFilters(filter.toArray(new ViewerFilter[filter.size()]));
}
};
// Open the dialog
if (dialog.open() == Window.OK) {
// Get the selected proxy from the dialog
selection = dialog.getSelection();
if (selection instanceof IStructuredSelection && !selection.isEmpty()) {
candidate = ((IStructuredSelection)selection).getFirstElement();
if (candidate instanceof IPeerNode) {
final IPeerNode proxy = (IPeerNode)candidate;
Protocol.invokeLater(new Runnable() {
@Override
public void run() {
redirect(peerNode, proxy);
DisplayUtil.safeAsyncExec(new Runnable() {
@Override
public void run() {
IWorkbenchPart part = HandlerUtil.getActivePart(event);
if (part instanceof CommonNavigator) {
CommonNavigator navigator = (CommonNavigator)part;
navigator.selectReveal(new StructuredSelection(peerNode));
}
}
});
}
});
}
}
}
}
}
return null;
}
/**
* Redirect the communication to the given peer through the given proxy.
* <p>
* The method must be called from within the TCF dispatch thread.
*
* @param peerNode The peer to redirect. Must not be <code>null</code>.
* @param proxy The proxy. Must not be <code>null</code>
*/
public void redirect(IPeerNode peerNode, IPeerNode proxy) {
Assert.isNotNull(peerNode);
Assert.isNotNull(proxy);
Assert.isTrue(Protocol.isDispatchThread(), "Illegal Thread Access"); //$NON-NLS-1$
// Get the peer attributes
Map<String, String> attributes = new HashMap<String, String>();
attributes.putAll(peerNode.getPeer().getAttributes());
// Set the redirection
attributes.put(IPeerNodeProperties.PROP_REDIRECT_PROXY, proxy.getPeerId());
try {
IURIPersistenceService uRIPersistenceService = ServiceManager.getInstance().getService(IURIPersistenceService.class);
if (uRIPersistenceService == null) {
throw new IOException("Persistence service instance unavailable."); //$NON-NLS-1$
}
uRIPersistenceService.write(new Peer(attributes), null);
// Create a peer redirector
PeerRedirector redirector = new PeerRedirector(proxy.getPeer(), attributes);
// And update the instance
peerNode.setProperty(IPeerNodeProperties.PROP_INSTANCE, redirector);
// Associate proxy (parent) and peer model (child)
peerNode.setParent(proxy);
Model.getModel().getService(IPeerModelUpdateService.class).addChild(peerNode);
// Trigger a refresh of the locator model in a later dispatch cycle
Protocol.invokeLater(new Runnable() {
@Override
public void run() {
Model.getModel().getService(IPeerModelRefreshService.class).refresh(null);
}
});
} catch (IOException e) {
String template = NLS.bind(Messages.RedirectHandler_error_redirectFailed, Messages.PossibleCause);
StatusHandlerUtil.handleStatus(StatusHelper.getStatus(e), peerNode, template,
Messages.RedirectHandler_error_title, IContextHelpIds.MESSAGE_REDIRECT_FAILED, this, null);
}
}
}
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