Java tutorial
/* * Copyright (c) 2008 Stiftung Deutsches Elektronen-Synchrotron, * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY. * * THIS SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "../AS IS" BASIS. * WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE AND * NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * THE USE OR OTHER DEALINGS IN THE SOFTWARE. SHOULD THE SOFTWARE PROVE DEFECTIVE * IN ANY RESPECT, THE USER ASSUMES THE COST OF ANY NECESSARY SERVICING, REPAIR OR * CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. * NO USE OF ANY SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER. * DESY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, * OR MODIFICATIONS. * THE FULL LICENSE SPECIFYING FOR THE SOFTWARE THE REDISTRIBUTION, MODIFICATION, * USAGE AND OTHER RIGHTS AND OBLIGATIONS IS INCLUDED WITH THE DISTRIBUTION OF THIS * PROJECT IN THE FILE LICENSE.HTML. IF THE LICENSE IS NOT INCLUDED YOU MAY FIND A COPY * AT HTTP://WWW.DESY.DE/LEGAL/LICENSE.HTM */ package org.csstudio.sds.ui.internal.statistics; import java.text.NumberFormat; import org.csstudio.domain.common.LayoutUtil; import org.csstudio.sds.internal.statistics.MeasureCategoriesEnum; import org.csstudio.sds.internal.statistics.StatisticUtil; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.core.runtime.jobs.Job; import org.eclipse.jface.viewers.ILabelProviderListener; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.ITableLabelProvider; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.swt.SWT; import org.eclipse.swt.events.MouseAdapter; import org.eclipse.swt.events.MouseEvent; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.ui.part.ViewPart; /** * This view displays the current performance measures by category. * * @author Sven Wende * */ public final class PerformanceMeasuresView extends ViewPart { /** * The view identification as configured in the plugin.xml. */ public static final String VIEW_ID = "org.csstudio.sds.ui.internal.statistics.PerformanceMeasuresView"; //$NON-NLS-1$ /** * {@inheritDoc} */ @Override public void createPartControl(final Composite parent) { parent.setLayout(LayoutUtil.createGridLayout(1, 0, 10, 10)); // create a table viewer, which displays the current measures final TableViewer measureResultsViewer = createMeasureResultsTable(parent); // create a button, which resets the statistics Button resetStatisticButton = new Button(parent, SWT.NONE); resetStatisticButton.setText("Reset"); resetStatisticButton.addMouseListener(new MouseAdapter() { @Override public void mouseDown(final MouseEvent e) { StatisticUtil.getInstance().init(); measureResultsViewer.refresh(); } }); final Display display = Display.getCurrent(); final Job job = new Job("Long Running Job") { @Override protected IStatus run(final IProgressMonitor monitor) { try { display.asyncExec(new Runnable() { public void run() { if (!measureResultsViewer.getControl().isDisposed()) { measureResultsViewer.refresh(); } } }); return Status.OK_STATUS; } finally { schedule(500); } } }; // job.setSystem(true); job.schedule(); } /** * {@inheritDoc} */ @Override public void setFocus() { } /** * Creates a table viewer, which enables the user to enter aliases. * * @param parent * the parent composite * * @return the created viewer */ private TableViewer createMeasureResultsTable(final Composite parent) { Group group = new Group(parent, SWT.NONE); group.setLayout(LayoutUtil.createGridLayout(1, 0, 0, 0)); group.setText("Performance Measures"); group.setLayoutData(LayoutUtil.createGridDataForHorizontalFillingCell(100)); // define column names String[] columnNames = new String[] { "PROP_NAME", "PROP_VALUE", "PROP_DESCRIPTION" }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ // create table final Table table = new Table(group, SWT.FULL_SELECTION | SWT.SCROLL_PAGE); table.setLinesVisible(true); table.setLayoutData(LayoutUtil.createGridDataForFillingCell()); table.setHeaderVisible(true); TableColumn column = new TableColumn(table, SWT.CENTER, 0); column.setText("Category"); column.setWidth(140); column = new TableColumn(table, SWT.LEFT, 1); column.setText("Exec [Counter]"); column.setWidth(140); column = new TableColumn(table, SWT.LEFT, 2); column.setText("Time [Execution]"); column.setWidth(140); column = new TableColumn(table, SWT.LEFT, 3); column.setText("Time [Total]"); column.setWidth(140); column = new TableColumn(table, SWT.LEFT, 4); column.setText("Avg Exec [ calls / ms"); column.setWidth(140); column = new TableColumn(table, SWT.LEFT, 5); column.setText("Avg Exec Time [ms / call"); column.setWidth(140); column = new TableColumn(table, SWT.LEFT, 6); column.setText("Avg Total Time [ms / call"); column.setWidth(140); // create viewer final TableViewer viewer = new TableViewer(table); // viewer.setUseHashlookup(true); // define column properties viewer.setColumnProperties(columnNames); // content and label provider viewer.setContentProvider(new MeasuresTableContentProvider()); viewer.setLabelProvider(new MeasuresTableLabelProvider()); viewer.setInput(MeasureCategoriesEnum.values()); return viewer; } /** * Content provider for the encapsulated measures table. * * @author Sven Wende */ protected final class MeasuresTableContentProvider implements IStructuredContentProvider { /** * {@inheritDoc} */ public void inputChanged(final Viewer viewer, final Object oldInput, final Object newInput) { } /** * {@inheritDoc} */ public Object[] getElements(final Object parent) { return (Object[]) parent; } /** * {@inheritDoc} */ public void dispose() { } } /** * Label provider for the encapsulated measures table. * * @author Sven Wende */ protected final class MeasuresTableLabelProvider implements ITableLabelProvider { /** * A number formatter needed for output. */ private NumberFormat _formatter = NumberFormat.getNumberInstance(); /** * The used statistics util. */ private StatisticUtil _statisticUtil = StatisticUtil.getInstance(); /** * {@inheritDoc} */ public Image getColumnImage(final Object element, final int columnIndex) { return null; } /** * {@inheritDoc} */ public String getColumnText(final Object element, final int columnIndex) { String result = ""; //$NON-NLS-1$ MeasureCategoriesEnum category = (MeasureCategoriesEnum) element; switch (columnIndex) { case 0: result = category.toString(); break; case 1: result = _formatter.format(_statisticUtil.getExecutionCount(category)); break; case 2: result = _formatter.format(_statisticUtil.getExecutionTimeSum(category)); break; case 3: result = _formatter.format(_statisticUtil.getRunningTime()); break; case 4: result = _formatter.format(_statisticUtil.getAverageCallsPerMs(category)); break; case 5: result = _formatter.format(_statisticUtil.getAverageExecutionTimePerCall(category)); break; case 6: result = _formatter.format(_statisticUtil.getAverageTimeBetweenCalls(category)); break; default: break; } assert result != null : "result!=null"; //$NON-NLS-1$; return result; } /** * {@inheritDoc} */ public void addListener(final ILabelProviderListener listener) { } /** * {@inheritDoc} */ public void dispose() { } /** * {@inheritDoc} */ public boolean isLabelProperty(final Object element, final String property) { return false; } /** * {@inheritDoc} */ public void removeListener(final ILabelProviderListener listener) { } } }