ThreadInformationsPanel.java

/*
 * Copyright 2008-2017 by Emeric Vernat
 *
 *     This file is part of Java Melody.
 *
 * Licensed 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 net.bull.javamelody;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.IOException;
import java.util.List;

import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

import net.bull.javamelody.swing.MButton;
import net.bull.javamelody.swing.Utilities;
import net.bull.javamelody.swing.table.MDefaultTableCellRenderer;
import net.bull.javamelody.swing.table.MTable;
import net.bull.javamelody.swing.table.MTableScrollPane;

/**
 * Panel des threads.
 * @author Emeric Vernat
 */
class ThreadInformationsPanel extends MelodyPanel {
	private static final long serialVersionUID = 1L;

	private final JavaInformations javaInformations;
	@SuppressWarnings("all")
	private final List<ThreadInformations> threadInformationsList;
	private final boolean stackTraceEnabled;
	private final boolean cpuTimeEnabled;
	private final MTable<ThreadInformations> table;

	private class NameTableCellRenderer extends MDefaultTableCellRenderer {
		private static final long serialVersionUID = 1L;

		NameTableCellRenderer() {
			super();
		}

		@Override
		public Component getTableCellRendererComponent(JTable jtable, Object value,
				boolean isSelected, boolean hasFocus, int row, int column) {
			// tooltip selon la stack-trace
			if (row == -1) {
				setToolTipText(null);
			} else {
				final MTable<ThreadInformations> myTable = getTable();
				final ThreadInformations threadInformations = myTable.getList()
						.get(myTable.convertRowIndexToModel(row));
				setToolTipText(convertStackTraceToHtml(threadInformations.getName(),
						threadInformations.getStackTrace()));
			}
			// et texte selon la valeur (nom du thread)
			return super.getTableCellRendererComponent(jtable, value, isSelected, hasFocus, row,
					column);
		}
	}

	private class StateTableCellRenderer extends MDefaultTableCellRenderer {
		private static final long serialVersionUID = 1L;

		StateTableCellRenderer() {
			super();
		}

		@Override
		public Component getTableCellRendererComponent(JTable jtable, Object value,
				boolean isSelected, boolean hasFocus, int row, int column) {
			// icône correspondant à l'état
			if (row == -1) {
				setIcon(null);
			} else {
				final MTable<ThreadInformations> myTable = getTable();
				final ThreadInformations threadInformations = myTable.getList()
						.get(myTable.convertRowIndexToModel(row));
				setIcon(ImageIconCache.getImageIcon("bullets/"
						+ HtmlThreadInformationsReport.getStateIcon(threadInformations)));
			}
			// et texte selon la valeur (libellé de l'état)
			return super.getTableCellRendererComponent(jtable, value, isSelected, hasFocus, row,
					column);
		}
	}

	ThreadInformationsPanel(RemoteCollector remoteCollector, JavaInformations javaInformations) {
		super(remoteCollector);
		assert javaInformations != null;
		this.javaInformations = javaInformations;
		this.threadInformationsList = javaInformations.getThreadInformationsList();
		this.stackTraceEnabled = javaInformations.isStackTraceEnabled();
		this.cpuTimeEnabled = !threadInformationsList.isEmpty()
				&& threadInformationsList.get(0).getCpuTimeMillis() != -1;

		final MTableScrollPane<ThreadInformations> scrollPane = createScrollPane();
		this.table = scrollPane.getTable();
		table.setList(threadInformationsList);
		Utilities.adjustTableHeight(table);

		add(scrollPane, BorderLayout.NORTH);

		final JLabel label = new JLabel(' ' + getString("Temps_threads"));
		add(label, BorderLayout.WEST);

		final JPanel buttonsPanel = createButtonsPanel();
		add(buttonsPanel, BorderLayout.EAST);
	}

	private MTableScrollPane<ThreadInformations> createScrollPane() {
		final MTableScrollPane<ThreadInformations> tableScrollPane = new MTableScrollPane<>();
		final MTable<ThreadInformations> myTable = tableScrollPane.getTable();
		myTable.addColumn("name", getString("Thread"));
		myTable.addColumn("daemon", getString("Demon"));
		myTable.addColumn("priority", getString("Priorite"));
		myTable.addColumn("state", getString("Etat"));
		if (stackTraceEnabled) {
			myTable.addColumn("executedMethod", getString("Methode_executee"));
		}
		if (cpuTimeEnabled) {
			myTable.addColumn("cpuTimeMillis", getString("Temps_cpu"));
			myTable.addColumn("userTimeMillis", getString("Temps_user"));
		}
		myTable.setColumnCellRenderer("state", new StateTableCellRenderer());

		myTable.setColumnCellRenderer("name", new NameTableCellRenderer());

		return tableScrollPane;
	}

	private JPanel createButtonsPanel() {
		final JPanel buttonsPanel = Utilities.createButtonsPanel();

		final MButton openButton = new MButton(getString("Ouvrir"),
				ImageIconCache.getImageIcon("action_open.png"));
		buttonsPanel.add(openButton);
		openButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				final ThreadInformations threadInformations = getTable().getSelectedObject();
				showStackTraceInPopup(threadInformations);
			}
		});
		table.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent e) {
				if (e.getClickCount() == 2) {
					openButton.doClick();
				}
			}
		});
		table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
			@Override
			public void valueChanged(ListSelectionEvent e) {
				final ThreadInformations threadInformations = getTable().getSelectedObject();
				openButton.setEnabled(threadInformations != null);
			}
		});
		openButton.setEnabled(false);

		if (Parameters.isSystemActionsEnabled()) {
			final MButton killThreadButton = new MButton(getString("Tuer"),
					ImageIconCache.getImageIcon("stop.png"));
			getTable().getSelectionModel().addListSelectionListener(new ListSelectionListener() {
				@Override
				public void valueChanged(ListSelectionEvent e) {
					final ThreadInformations threadInformations = getTable().getSelectedObject();
					killThreadButton.setEnabled(threadInformations != null);
					if (threadInformations != null) {
						killThreadButton.setToolTipText(
								getFormattedString("kill_thread", threadInformations.getName()));
					} else {
						killThreadButton.setToolTipText(null);
					}
				}
			});
			killThreadButton.setEnabled(getTable().getSelectedObject() != null);
			killThreadButton.addActionListener(new ActionListener() {
				@Override
				public void actionPerformed(ActionEvent e) {
					final ThreadInformations threadInformations = getTable().getSelectedObject();
					if (threadInformations != null
							&& confirm(getFormattedString("confirm_kill_thread",
									threadInformations.getName()))) {
						actionKillThread(threadInformations);
					}
				}
			});

			buttonsPanel.add(killThreadButton);
		}

		if (stackTraceEnabled) {
			final MButton dumpThreadsButton = new MButton(getString("Dump_threads_en_texte"),
					ImageIconCache.getImageIcon("text.png"));
			dumpThreadsButton.addActionListener(new ActionListener() {
				@Override
				public void actionPerformed(ActionEvent e) {
					actionDumpThreads();
				}
			});
			buttonsPanel.add(dumpThreadsButton);
		}

		return buttonsPanel;
	}

	final void actionKillThread(ThreadInformations threadInformations) {
		try {
			final String message = getRemoteCollector().executeActionAndCollectData(
					Action.KILL_THREAD, null, null, threadInformations.getGlobalThreadId(), null,
					null);
			showMessage(message);
			MainPanel.refreshMainTabFromChild(this);
		} catch (final IOException ex) {
			showException(ex);
		}
	}

	final void actionDumpThreads() {
		try {
			final ThreadsDumpPanel panel = new ThreadsDumpPanel(getRemoteCollector(),
					javaInformations);
			MainPanel.addOngletFromChild(this, panel);
		} catch (final IOException ex) {
			showException(ex);
		}
	}

	final void showStackTraceInPopup(ThreadInformations threadInformations) {
		final StringBuilder sb = new StringBuilder();
		sb.append(threadInformations.getName());
		final List<StackTraceElement> stackTrace = threadInformations.getStackTrace();
		if (stackTrace != null && !stackTrace.isEmpty()) {
			// même si stackTraceEnabled, ce thread n'a pas forcément de stack-trace
			sb.append('\n');
			for (final StackTraceElement stackTraceElement : stackTrace) {
				sb.append(stackTraceElement);
				sb.append('\n');
			}
		}
		final String title = threadInformations.getName();
		final String text = sb.toString();
		Utilities.showTextInPopup(this, title, text);
	}

	static String convertStackTraceToHtml(String description, List<StackTraceElement> stackTrace) {
		if (stackTrace != null && !stackTrace.isEmpty()) {
			// même si stackTraceEnabled, ce thread n'a pas forcément de stack-trace
			final StringBuilder sb = new StringBuilder();
			sb.append("<html>");
			sb.append(description);
			sb.append("<br/>");
			for (final StackTraceElement stackTraceElement : stackTrace) {
				sb.append(stackTraceElement);
				sb.append("<br/>");
			}
			return sb.toString();
		}
		return null;
	}

	JLabel createThreadDeadlocksLabel() {
		final StringBuilder sb = new StringBuilder();
		sb.append("  ");
		sb.append(getString("Threads_deadlocks"));
		String separator = " ";
		for (final ThreadInformations thread : threadInformationsList) {
			if (thread.isDeadlocked()) {
				sb.append(separator);
				sb.append(thread.getName());
				separator = ", ";
			}
		}
		final JLabel label = new JLabel(sb.toString());
		label.setForeground(Color.RED);
		label.setFont(label.getFont().deriveFont(Font.BOLD));
		// séparateur avec composants au-dessus
		label.setBorder(BorderFactory.createEmptyBorder(10, 0, 0, 0));
		return label;
	}

	MTable<ThreadInformations> getTable() {
		return table;
	}
}