Java tutorial
/******************************************************************************* * Copyright (c) 2013 Red Hat, Inc. * All rights reserved. * This program is 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: * Red Hat, Inc. - initial API and implementation * ******************************************************************************/ package org.fusesource.ide.jmx.karaf.navigator.osgi; import java.util.ArrayList; import java.util.Collections; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Set; import java.util.concurrent.Callable; import javax.management.Notification; import javax.management.NotificationListener; import org.eclipse.jface.action.Action; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Composite; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.views.properties.IPropertySource; import org.fusesource.ide.foundation.core.util.Objects; import org.fusesource.ide.foundation.ui.jobs.Jobs; import org.fusesource.ide.foundation.ui.util.Selections; import org.fusesource.ide.foundation.ui.util.Viewers; import org.fusesource.ide.jmx.karaf.KarafJMXPlugin; import org.fusesource.ide.jmx.karaf.Messages; public class BundlesTabSection extends BundlesTableView { private BundlesNode current; private Action startBundleAction; private Action stopBundleAction; private Action uninstallBundleAction; private NotificationListener notificationListener; public BundlesTabSection() { super(BundlesTableSheetPage.VIEW_ID, null); startBundleAction = new Action(Messages.StartBundleAction, SWT.CHECK) { @Override public void run() { startBundles(); } }; startBundleAction.setToolTipText(Messages.StartBundleActionToolTip); startBundleAction.setImageDescriptor(KarafJMXPlugin.getDefault().getImageDescriptor("start_task.gif")); startBundleAction.setId(BundlesTabSection.class.getName() + ".Start"); stopBundleAction = new Action(Messages.StopBundleAction, SWT.CHECK) { @Override public void run() { stopBundles(); } }; stopBundleAction.setToolTipText(Messages.StopBundleActionToolTip); stopBundleAction.setImageDescriptor(KarafJMXPlugin.getDefault().getImageDescriptor("stop_task.gif")); stopBundleAction.setId(BundlesTabSection.class.getName() + ".Stop"); uninstallBundleAction = new Action(Messages.UninstallBundleAction, SWT.CHECK) { @Override public void run() { uninstallBundles(); } }; uninstallBundleAction.setToolTipText(Messages.UninstallBundleActionToolTip); uninstallBundleAction.setImageDescriptor(KarafJMXPlugin.getDefault().getImageDescriptor("delete.gif")); uninstallBundleAction.setId(BundlesTabSection.class.getName() + ".Uninstall"); startBundleAction.setEnabled(false); stopBundleAction.setEnabled(false); uninstallBundleAction.setEnabled(false); notificationListener = new NotificationListener() { @Override public void handleNotification(Notification notification, Object handback) { refresh(); } }; } @Override public void createPartControl(Composite parent) { super.createPartControl(parent); getViewer().addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { Set<String> states = new HashSet<>(getSelectedBundleIDStates().values()); startBundleAction.setEnabled(!states.isEmpty() && !states.contains("ACTIVE")); stopBundleAction.setEnabled(!states.isEmpty() && states.contains("ACTIVE")); uninstallBundleAction.setEnabled(!states.isEmpty() && !states.contains("ACTIVE")); } }); addToolBarActions(startBundleAction, stopBundleAction, uninstallBundleAction); addLocalMenuActions(startBundleAction, stopBundleAction, uninstallBundleAction); } @Override public void setInput(IWorkbenchPart part, ISelection selection) { BundlesNode bundles = (BundlesNode) Selections.getFirstSelection(selection); if (bundles == current) { return; } if (current != null) { current.getFacade().removeBundleStateNotificationListener(notificationListener, null, null); } current = bundles; List<IPropertySource> propertySources = bundles == null ? Collections.emptyList() : bundles.getPropertySourceList(); setPropertySources(propertySources); getViewer().setInput(propertySources); recreateColumns(); getSearchText().setText(getInitialSearchText()); getViewer().refresh(true); } @Override protected String getInitialSearchText() { String searchText = current == null ? null : current.getBundlefilterText(); return searchText == null ? "" : searchText; } @Override protected void recreateColumns() { if (current != null) { super.recreateColumns(); } } @Override public void aboutToBeShown() { if (current != null) { current.getFacade().addBundleStateNotificationListener(notificationListener, null, null); } super.aboutToBeShown(); } @Override public void aboutToBeHidden() { if (current != null) { current.getFacade().removeBundleStateNotificationListener(notificationListener, null, null); } super.aboutToBeHidden(); } protected void startBundles() { final long[] ids = getSelectedBundleIds(); if (ids.length > 0) { String message = Objects.makeString("Start bundles ", ", ", "", ids); doUpdate(message, new Callable<Boolean>() { @Override public Boolean call() throws Exception { current.getFacade().startBundles(ids); return true; } }); } } protected void stopBundles() { final long[] ids = getSelectedBundleIds(); if (ids.length > 0) { String message = Objects.makeString("Stop bundles ", ", ", "", ids); doUpdate(message, new Callable<Boolean>() { @Override public Boolean call() throws Exception { current.getFacade().stopBundles(ids); return true; } }); } } protected void uninstallBundles() { final long[] ids = getSelectedBundleIds(); if (ids.length > 0) { String message = Objects.makeString("Uninstall bundles ", ", ", "", ids); doUpdate(message, new Callable<Boolean>() { @Override public Boolean call() throws Exception { current.getFacade().uninstallBundles(ids); return true; } }); } } protected void doUpdate(String message, final Callable<Boolean> callable) { Jobs.schedule(message, new Callable<Boolean>() { @Override public Boolean call() throws Exception { Boolean answer = callable.call(); if (answer != null && answer.booleanValue()) { refresh(); } return answer; } }); } @Override public void refresh() { Viewers.async(new Runnable() { @Override public void run() { Set<Long> selectedBundleIds = getSelectedBundleIDStates().keySet(); setPropertySources(current.getPropertySourceList()); BundlesTabSection.super.refresh(); setSelectedBundleIds(selectedBundleIds); } }); } protected void setSelectedBundleIds(Set<Long> selectedBundleIds) { TableViewer viewer = getViewer(); if (viewer != null) { List<?> propertySources = getPropertySources(); List<Object> selected = new ArrayList<>(); for (Object object : propertySources) { if (object instanceof IPropertySource) { BundleStateFacade bundleState = new BundleStateFacade((IPropertySource) object); final Long id = bundleState.getId(); if (id != null && selectedBundleIds.contains(id)) { selected.add(object); } } } viewer.setSelection(new StructuredSelection(selected)); if (selected.size() == 1) { Object first = selected.get(0); viewer.reveal(first); } } } protected long[] getSelectedBundleIds() { Set<Long> ids = getSelectedBundleIDStates().keySet(); long[] answer = new long[ids.size()]; int idx = 0; for (Long n : ids) { if (n != null) { answer[idx++] = n.longValue(); } } return answer; } protected Map<Long, String> getSelectedBundleIDStates() { Map<Long, String> answer = new HashMap<>(); IStructuredSelection selection = Selections.getStructuredSelection(getViewer()); if (selection != null) { Iterator<?> iter = selection.iterator(); while (iter.hasNext()) { Object value = iter.next(); if (value instanceof IPropertySource) { BundleStateFacade bundleState = new BundleStateFacade((IPropertySource) value); Long id = bundleState.getId(); String state = bundleState.getState(); if (id != null && state != null) { answer.put(id, state); } } } } return answer; } public BundlesNode getCurrent() { return current; } }