/*

 * Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

package sun.tools.jconsole;

import java.awt.*;

import java.awt.event.*;

import java.io.*;

import java.lang.management.*;

import java.lang.reflect.*;

import java.util.*;

import java.util.concurrent.*;

import javax.accessibility.*;

import javax.management.*;

import javax.management.openmbean.CompositeData;

import javax.swing.*;

import javax.swing.border.*;

import static sun.tools.jconsole.Formatter.*;

import static sun.tools.jconsole.Utilities.*;

@SuppressWarnings("serial")

class MemoryTab extends Tab implements ActionListener, ItemListener {

    JComboBox<Plotter> plotterChoice;

    TimeComboBox timeComboBox;

    JButton gcButton;

    PlotterPanel plotterPanel;

    JPanel bottomPanel;

    HTMLPane details;

    PoolChart poolChart;

    ArrayList<Plotter> plotterList;

    Plotter heapPlotter, nonHeapPlotter;

    private MemoryOverviewPanel overviewPanel;

    private static final String usedKey        = "used";

    private static final String committedKey   = "committed";

    private static final String maxKey         = "max";

    private static final String thresholdKey   = "threshold";

    private static final Color  usedColor      = Plotter.defaultColor;

    private static final Color  committedColor = null;

    private static final Color  maxColor       = null;

    private static final Color  thresholdColor = Color.red;

    /*

      Hierarchy of panels and layouts for this tab:

        MemoryTab (BorderLayout)

            North:  topPanel (BorderLayout)

                        Center: controlPanel (FlowLayout)

                                    plotterChoice, timeComboBox

                        East:   topRightPanel (FlowLayout)

                                    gcButton

            Center: plotterPanel

                        Center: plotter

            South:  bottomPanel (BorderLayout)

                        Center: details

                        East:   poolChart

    */

    public static String getTabName() {

        return Messages.MEMORY;

    }

    public MemoryTab(VMPanel vmPanel) {

        super(vmPanel, getTabName());

        setLayout(new BorderLayout(0, 0));

        setBorder(new EmptyBorder(4, 4, 3, 4));

        JPanel topPanel     = new JPanel(new BorderLayout());

               plotterPanel = new PlotterPanel(null);

               bottomPanel  = new JPanel(new BorderLayout());

        add(topPanel,     BorderLayout.NORTH);

        add(plotterPanel, BorderLayout.CENTER);

        JPanel controlPanel = new JPanel(new FlowLayout(FlowLayout.LEADING, 20, 5));

        topPanel.add(controlPanel, BorderLayout.CENTER);

        // Plotter choice

        plotterChoice = new JComboBox<Plotter>();

        plotterChoice.addItemListener(this);

        controlPanel.add(new LabeledComponent(Messages.CHART_COLON,

                                              Resources.getMnemonicInt(Messages.CHART_COLON),

                                              plotterChoice));

        // Range control

        timeComboBox = new TimeComboBox();

        controlPanel.add(new LabeledComponent(Messages.TIME_RANGE_COLON,

                                              Resources.getMnemonicInt(Messages.TIME_RANGE_COLON),

                                              timeComboBox));

        gcButton = new JButton(Messages.PERFORM_GC);

        gcButton.setMnemonic(Resources.getMnemonicInt(Messages.PERFORM_GC));

        gcButton.addActionListener(this);

        gcButton.setToolTipText(Messages.PERFORM_GC_TOOLTIP);

        JPanel topRightPanel = new JPanel();

        topRightPanel.setBorder(new EmptyBorder(0, 65-8, 0, 70));

        topRightPanel.add(gcButton);

        topPanel.add(topRightPanel, BorderLayout.AFTER_LINE_ENDS);

        bottomPanel.setBorder(new CompoundBorder(new TitledBorder(Messages.DETAILS),

                                                  new EmptyBorder(10, 10, 10, 10)));

        details = new HTMLPane();

        setAccessibleName(details, Messages.DETAILS);

        bottomPanel.add(new JScrollPane(details), BorderLayout.CENTER);

        poolChart = new PoolChart();

        bottomPanel.add(poolChart, BorderLayout.AFTER_LINE_ENDS);

    }

    private void createPlotters() throws IOException {

        plotterList = new ArrayList<Plotter>();

        ProxyClient proxyClient = vmPanel.getProxyClient();

        heapPlotter = new Plotter(Plotter.Unit.BYTES) {

            public String toString() {

                return Messages.HEAP_MEMORY_USAGE;

            }

        };

        proxyClient.addWeakPropertyChangeListener(heapPlotter);

        nonHeapPlotter = new Plotter(Plotter.Unit.BYTES) {

            public String toString() {

                return Messages.NON_HEAP_MEMORY_USAGE;

            }

        };

        setAccessibleName(heapPlotter,

                          Messages.MEMORY_TAB_HEAP_PLOTTER_ACCESSIBLE_NAME);

        setAccessibleName(nonHeapPlotter,

                          Messages.MEMORY_TAB_NON_HEAP_PLOTTER_ACCESSIBLE_NAME);

        proxyClient.addWeakPropertyChangeListener(nonHeapPlotter);

        heapPlotter.createSequence(usedKey,         Messages.USED,      usedColor,      true);

        heapPlotter.createSequence(committedKey,    Messages.COMMITTED, committedColor, false);

        heapPlotter.createSequence(maxKey,          Messages.MAX,       maxColor,       false);

        nonHeapPlotter.createSequence(usedKey,      Messages.USED,      usedColor,      true);

        nonHeapPlotter.createSequence(committedKey, Messages.COMMITTED, committedColor, false);

        nonHeapPlotter.createSequence(maxKey,       Messages.MAX,       maxColor,       false);

        plotterList.add(heapPlotter);

        plotterList.add(nonHeapPlotter);

        // Now add memory pools

        Map<ObjectName, MBeanInfo> mBeanMap = proxyClient.getMBeans("java.lang");

        Set<ObjectName> keys = mBeanMap.keySet();

        ObjectName[] objectNames = keys.toArray(new ObjectName[keys.size()]);

        ArrayList<PoolPlotter> nonHeapPlotters = new ArrayList<PoolPlotter>(2);

        for (ObjectName objectName : objectNames) {

            String type = objectName.getKeyProperty("type");

            if (type.equals("MemoryPool")) {

                String name = Resources.format(Messages.MEMORY_POOL_LABEL,

                                               objectName.getKeyProperty("name"));

                // Heap or non-heap?

                boolean isHeap = false;

                AttributeList al =

                    proxyClient.getAttributes(objectName,

                                              new String[] { "Type" });

                if (al.size() > 0) {

                    isHeap = MemoryType.HEAP.name().equals(((Attribute)al.get(0)).getValue());

                }

                PoolPlotter poolPlotter = new PoolPlotter(objectName, name, isHeap);

                proxyClient.addWeakPropertyChangeListener(poolPlotter);

                poolPlotter.createSequence(usedKey,      Messages.USED,      usedColor,      true);

                poolPlotter.createSequence(committedKey, Messages.COMMITTED, committedColor, false);

                poolPlotter.createSequence(maxKey,       Messages.MAX,       maxColor,       false);

                poolPlotter.createSequence(thresholdKey, Messages.THRESHOLD, thresholdColor, false);

                poolPlotter.setUseDashedTransitions(thresholdKey, true);

                if (isHeap) {

                    plotterList.add(poolPlotter);

                } else {

                    // Will be added to plotterList below

                    nonHeapPlotters.add(poolPlotter);

                }

            }

        }

        // Add non-heap plotters last

        for (PoolPlotter poolPlotter : nonHeapPlotters) {

            plotterList.add(poolPlotter);

        }

    }

    public void itemStateChanged(ItemEvent ev) {

        if (ev.getStateChange() == ItemEvent.SELECTED) {

            Plotter plotter = (Plotter)plotterChoice.getSelectedItem();

            plotterPanel.setPlotter(plotter);

            plotterPanel.repaint();

        }

    }

    public void gc() {

        new Thread("MemoryPanel.gc") {

            public void run() {

                ProxyClient proxyClient = vmPanel.getProxyClient();

                try {

                    proxyClient.getMemoryMXBean().gc();

                } catch (UndeclaredThrowableException e) {

                    proxyClient.markAsDead();

                } catch (IOException e) {

                    // Ignore

                }

            }

        }.start();

    }

    public SwingWorker<?, ?> newSwingWorker() {

        return new SwingWorker<Boolean, Object>() {

            private long[] used, committed, max, threshold;

            private long timeStamp;

            private String detailsStr;

            private boolean initialRun = false;

            public Boolean doInBackground() {

                ProxyClient proxyClient = vmPanel.getProxyClient();

                if (plotterList == null) {

                    try {

                        createPlotters();

                    } catch (UndeclaredThrowableException e) {

                        proxyClient.markAsDead();

                        return false;

                    } catch (final IOException ex) {

                        return false;

                    }

                    initialRun = true;

                }

                int n = plotterList.size();

                used      = new long[n];

                committed = new long[n];

                max       = new long[n];

                threshold = new long[n];

                timeStamp = System.currentTimeMillis();

                for (int i = 0; i < n; i++) {

                    Plotter plotter = plotterList.get(i);

                    MemoryUsage mu = null;

                    used[i] = -1L;

                    threshold[i] = -1L;

                    try {

                        if (plotter instanceof PoolPlotter) {

                            PoolPlotter poolPlotter = (PoolPlotter)plotter;

                            ObjectName objectName = poolPlotter.objectName;

                            AttributeList al =

                                proxyClient.getAttributes(objectName,

                                                          new String[] { "Usage", "UsageThreshold" });

                            if (al.size() > 0) {

                                CompositeData cd = (CompositeData)((Attribute)al.get(0)).getValue();

                                mu = MemoryUsage.from(cd);

                                if (al.size() > 1) {

                                    threshold[i] = (Long)((Attribute)al.get(1)).getValue();

                                }

                            }

                        } else if (plotter == heapPlotter) {

                            mu = proxyClient.getMemoryMXBean().getHeapMemoryUsage();

                        } else if (plotter == nonHeapPlotter) {

                            mu = proxyClient.getMemoryMXBean().getNonHeapMemoryUsage();

                        }

                    } catch (UndeclaredThrowableException e) {

                        proxyClient.markAsDead();

                        return false;

                    } catch (IOException ex) {

                        // Skip this plotter

                    }

                    if (mu != null) {

                        used[i]      = mu.getUsed();

                        committed[i] = mu.getCommitted();

                        max[i]       = mu.getMax();

                    }

                }

                detailsStr = formatDetails();

                return true;

            }

            protected void done() {

                try {

                    if (!get()) {

                        return;

                    }

                } catch (InterruptedException ex) {

                    return;

                } catch (ExecutionException ex) {

                    if (JConsole.isDebug()) {

                        ex.printStackTrace();

                    }

                    return;

                }

                if (initialRun) {

                    // Add Memory Pools

                    for (Plotter p : plotterList) {

                        plotterChoice.addItem(p);

                        timeComboBox.addPlotter(p);

                    }

                    add(bottomPanel,  BorderLayout.SOUTH);

                }

                int n = plotterList.size();

                int poolCount = 0;

                for (int i = 0; i < n; i++) {

                    Plotter plotter = plotterList.get(i);

                    if (used[i] >= 0L) {

                        if (plotter instanceof PoolPlotter) {

                            plotter.addValues(timeStamp, used[i], committed[i], max[i], threshold[i]);

                            if (threshold[i] > 0L) {

                                plotter.setIsPlotted(thresholdKey, true);

                            }

                            poolChart.setValue(poolCount++, (PoolPlotter)plotter,

                                               used[i], threshold[i], max[i]);

                        } else {

                            plotter.addValues(timeStamp, used[i], committed[i], max[i]);

                        }

                        if (plotter == heapPlotter && overviewPanel != null) {

                            overviewPanel.getPlotter().addValues(timeStamp, used[i]);

                            overviewPanel.updateMemoryInfo(used[i], committed[i], max[i]);

                        }

                    }

                }

                details.setText(detailsStr);

            }

        };

    }

    private String formatDetails() {

        ProxyClient proxyClient = vmPanel.getProxyClient();

        if (proxyClient.isDead()) {

            return "";

        }

        String text = "<table cellspacing=0 cellpadding=0>";

        Plotter plotter = (Plotter)plotterChoice.getSelectedItem();

        if (plotter == null) {

            return "";

        }

        //long time = plotter.getLastTimeStamp();

        long time = System.currentTimeMillis();

        String timeStamp = formatDateTime(time);

        text += newRow(Messages.TIME, timeStamp);

        long used = plotter.getLastValue(usedKey);

        long committed = plotter.getLastValue(committedKey);

        long max = plotter.getLastValue(maxKey);

        long threshold = plotter.getLastValue(thresholdKey);

        text += newRow(Messages.USED, formatKBytes(used));

        if (committed > 0L) {

            text += newRow(Messages.COMMITTED, formatKBytes(committed));

        }

        if (max > 0L) {

            text += newRow(Messages.MAX, formatKBytes(max));

        }

        if (threshold > 0L) {

            text += newRow(Messages.USAGE_THRESHOLD, formatKBytes(threshold));

        }

        try {

            Collection<GarbageCollectorMXBean> garbageCollectors =

                proxyClient.getGarbageCollectorMXBeans();

            boolean descPrinted = false;

            for (GarbageCollectorMXBean garbageCollectorMBean : garbageCollectors) {

                String gcName = garbageCollectorMBean.getName();

                long gcCount = garbageCollectorMBean.getCollectionCount();

                long gcTime = garbageCollectorMBean.getCollectionTime();

                String str = Resources.format(Messages.GC_TIME_DETAILS, justify(formatTime(gcTime), 14),

                                              gcName,

                                              String.format("%,d",gcCount));

                if (!descPrinted) {

                    text += newRow(Messages.GC_TIME, str);

                    descPrinted = true;

                } else {

                    text += newRow(null, str);

                }

           }

        } catch (IOException e) {

        }

        return text;

    }

    public void actionPerformed(ActionEvent ev) {

        Object src = ev.getSource();

        if (src == gcButton) {

            gc();

        }

    }

    private class PoolPlotter extends Plotter {

        ObjectName objectName;

        String name;

        boolean isHeap;

        long value, threshold, max;

        int barX;

        public PoolPlotter(ObjectName objectName, String name, boolean isHeap) {

            super(Plotter.Unit.BYTES);

            this.objectName = objectName;

            this.name       = name;

            this.isHeap     = isHeap;

            setAccessibleName(this,

                              Resources.format(Messages.MEMORY_TAB_POOL_PLOTTER_ACCESSIBLE_NAME,

                                               name));

        }

        public String toString() {

            return name;

        }

    }

    private class PoolChart extends BorderedComponent

                            implements Accessible, MouseListener {

        final int height       = 150;

        final int leftMargin   =  50;

        final int rightMargin  =  23;

        final int bottomMargin =  35;

        final int barWidth     =  22;

        final int barGap       =   3;

        final int groupGap     =   8;

        final int barHeight    = height * 2 / 3;

        final Color greenBar           = new Color(100, 255, 100);

        final Color greenBarBackground = new Color(210, 255, 210);

        final Color redBarBackground   = new Color(255, 210, 210);

        Font smallFont = null;

        ArrayList<PoolPlotter> poolPlotters = new ArrayList<PoolPlotter>(5);

        int nHeapPools    = 0;

        int nNonHeapPools = 0;

        Rectangle heapRect    = new Rectangle(leftMargin,            height - bottomMargin + 6, barWidth, 20);

        Rectangle nonHeapRect = new Rectangle(leftMargin + groupGap, height - bottomMargin + 6, barWidth, 20);

        public PoolChart() {

            super(null, null);

            setFocusable(true);

            addMouseListener(this);

            ToolTipManager.sharedInstance().registerComponent(this);

        }

        public void setValue(int poolIndex, PoolPlotter poolPlotter,

                             long value, long threshold, long max) {

            poolPlotter.value = value;

            poolPlotter.threshold = threshold;

            poolPlotter.max = max;

            if (poolIndex == poolPlotters.size()) {

                poolPlotters.add(poolPlotter);

                if (poolPlotter.isHeap) {

                    poolPlotter.barX = nHeapPools * (barWidth + barGap);

                    nHeapPools++;

                    heapRect.width = nHeapPools * barWidth + (nHeapPools - 1) * barGap;

                    nonHeapRect.x  = leftMargin + heapRect.width + groupGap;

                } else {

                    poolPlotter.barX = nonHeapRect.x - leftMargin + nNonHeapPools * (barWidth + barGap);

                    nNonHeapPools++;

                    nonHeapRect.width = nNonHeapPools * barWidth + (nNonHeapPools - 1) * barGap;

                }

            } else {

                poolPlotters.set(poolIndex, poolPlotter);

            }

            repaint();

        }

        private void paintPoolBar(Graphics g, PoolPlotter poolPlotter) {