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/*******************************************************************************
* Copyright (c) 2012, 2013 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.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.atomic.AtomicBoolean;
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.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.osgi.util.NLS;
import org.eclipse.tcf.protocol.IPeer;
import org.eclipse.tcf.protocol.Protocol;
import org.eclipse.tcf.te.runtime.callback.Callback;
import org.eclipse.tcf.te.runtime.interfaces.callback.ICallback;
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.tcf.core.peers.Peer;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModel;
import org.eclipse.tcf.te.tcf.locator.interfaces.services.ILocatorModelRefreshService;
import org.eclipse.tcf.te.tcf.locator.model.Model;
import org.eclipse.tcf.te.tcf.ui.activator.UIPlugin;
import org.eclipse.tcf.te.tcf.ui.help.IContextHelpIds;
import org.eclipse.tcf.te.tcf.ui.nls.Messages;
import org.eclipse.tcf.te.ui.views.Managers;
import org.eclipse.tcf.te.ui.views.interfaces.IUIConstants;
import org.eclipse.tcf.te.ui.views.interfaces.categories.ICategorizable;
import org.eclipse.ui.handlers.HandlerUtil;
/**
* "Always available offline" command handler implementation.
*/
public class OfflineCommandHandler extends AbstractHandler {
/* (non-Javadoc)
* @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
*/
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
// Get the current selection
final ISelection selection = HandlerUtil.getCurrentSelection(event);
// Make the selection available offline
if (selection != null) makeAvailableOffline(selection, new Callback() {
@Override
protected void internalDone(Object caller, IStatus status) {
if (status.getSeverity() == IStatus.ERROR) {
StatusHandlerUtil.handleStatus(status, selection, null,
Messages.OfflineCommandHandler_error_title, IContextHelpIds.MESSAGE_MAKEOFFLINE_FAILED, OfflineCommandHandler.this, null);
}
// Trigger a refresh of the model
Protocol.invokeLater(new Runnable() {
@Override
public void run() {
ILocatorModelRefreshService service = Model.getModel().getService(ILocatorModelRefreshService.class);
// Refresh the model now (must be executed within the TCF dispatch thread)
if (service != null) service.refresh(null);
}
});
}
});
return null;
}
/**
* Tests if the elements of the given selection can be made
* available offline.
*
* @param selection The selection. Must not be <code>null</code>.
* @return <code>True</code> if the elements can be made available offline, <code>false</code> otherwise.
*/
public boolean canMakeAvailableOffline(ISelection selection) {
Assert.isNotNull(selection);
boolean enabled = false;
// The selection must be a structured selection and must not be empty
if (selection instanceof IStructuredSelection && !selection.isEmpty()) {
// Assume the selection to be deletable
enabled = true;
// Iterate the selection. All elements must be of type IPeerModel
Iterator<?> iterator = ((IStructuredSelection)selection).iterator();
while (iterator.hasNext()) {
Object element = iterator.next();
if (!(element instanceof IPeerModel)) {
enabled = false;
break;
}
// Determine if the selected peer model is static
boolean isStatic = isStatic((IPeerModel)element);
if (isStatic) enabled = false;
if (!enabled) break;
}
}
return enabled;
}
/**
* Determines if the given peer model node is a static node.
*
* @param node The peer model node. Must not be <code>null</code>.
* @return <code>True</code> if the node is static, <code>false</code> otherwise.
*/
private boolean isStatic(final IPeerModel node) {
Assert.isNotNull(node);
final AtomicBoolean isStatic = new AtomicBoolean();
Runnable runnable = new Runnable() {
@Override
public void run() {
isStatic.set(node.isStatic());
}
};
if (Protocol.isDispatchThread()) runnable.run();
else Protocol.invokeAndWait(runnable);
return isStatic.get();
}
/**
* Creates an offline copy of the peer attributes.
*
* @param selection The selection. Must not be <code>null</code>.
* @param callback The callback. Must not be <code>null</code>.
*/
public void makeAvailableOffline(final ISelection selection, final ICallback callback) {
Assert.isNotNull(selection);
Assert.isNotNull(callback);
Runnable runnable = new Runnable() {
@Override
public void run() {
// The status to report back
IStatus status = Status.OK_STATUS;
// The selection must be a structured selection and must not be empty
if (selection instanceof IStructuredSelection && !selection.isEmpty()) {
// Iterate the selection. All elements must be of type IPeerModel
Iterator<?> iterator = ((IStructuredSelection)selection).iterator();
while (iterator.hasNext()) {
Object element = iterator.next();
Assert.isTrue(element instanceof IPeerModel);
IPeerModel node = (IPeerModel)element;
// Copy the peer attributes
Map<String, String> attrs = new HashMap<String, String>();
attrs.putAll(node.getPeer().getAttributes());
// Remove attributes filled in by the discovery
attrs.remove(IPeer.ATTR_AGENT_ID);
attrs.remove(IPeer.ATTR_SERVICE_MANGER_ID);
attrs.remove("ServerManagerID"); //$NON-NLS-1$
attrs.remove(IPeer.ATTR_USER_NAME);
attrs.remove(IPeer.ATTR_OS_NAME);
// Persist the attributes
try {
IURIPersistenceService service = ServiceManager.getInstance().getService(IURIPersistenceService.class);
if (service == null) {
throw new IOException("Persistence service instance unavailable."); //$NON-NLS-1$
}
service.write(new Peer(attrs), null);
// Remove the node from the "Neighborhood" category
ICategorizable categorizable = (ICategorizable)node.getAdapter(ICategorizable.class);
if (categorizable == null) categorizable = (ICategorizable)Platform.getAdapterManager().getAdapter(node, ICategorizable.class);
Assert.isNotNull(categorizable);
Managers.getCategoryManager().remove(IUIConstants.ID_CAT_NEIGHBORHOOD, categorizable.getId());
} catch (IOException e) {
status = new Status(IStatus.ERROR, UIPlugin.getUniqueIdentifier(),
NLS.bind(Messages.OfflineCommandHandler_error_makeOffline_failed, node.getName(), e.getLocalizedMessage()), e);
}
if (status != null) break;
}
}
// Invoke the callback
callback.done(OfflineCommandHandler.this, status);
}
};
Protocol.invokeLater(runnable);
}
}
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