/*

 * Copyright (c) 2004, 2012, 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

 * questions.

 */

package sun.tools.jconsole;

import java.awt.*;

import java.io.*;

import java.lang.management.*;

import java.lang.reflect.*;

import java.text.*;

import java.util.*;

import java.util.concurrent.*;

import javax.swing.*;

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

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

@SuppressWarnings("serial")

class SummaryTab extends Tab {

    private static final String cpuUsageKey = "cpu";

    private static final String newDivider =   "<tr><td colspan=4><font size =-1><hr>";

    private static final String newTable =     "<tr><td colspan=4 align=left><table cellpadding=1>";

    private static final String newLeftTable = "<tr><td colspan=2 align=left><table cellpadding=1>";

    private static final String newRightTable =  "<td colspan=2 align=left><table cellpadding=1>";

    private static final String endTable = "</table>";

    private static final int CPU_DECIMALS = 1;

    private CPUOverviewPanel overviewPanel;

    private DateFormat headerDateTimeFormat;

    private String pathSeparator = null;

    HTMLPane info;

    private static class Result {

        long upTime = -1L;

        long processCpuTime = -1L;

        long timeStamp;

        int nCPUs;

        String summary;

    }

    public static String getTabName() {

        return Messages.SUMMARY_TAB_TAB_NAME;

    }

    public SummaryTab(VMPanel vmPanel) {

        super(vmPanel, getTabName());

        setLayout(new BorderLayout());

        info = new HTMLPane();

        setAccessibleName(info, getTabName());

        add(new JScrollPane(info));

        headerDateTimeFormat =

            Formatter.getDateTimeFormat(Messages.SUMMARY_TAB_HEADER_DATE_TIME_FORMAT);

    }

    public SwingWorker<?, ?> newSwingWorker() {

        return new SwingWorker<Result, Object>() {

            public Result doInBackground() {

                return formatSummary();

            }

            protected void done() {

                try {

                    Result result = get();

                    if (result != null) {

                        info.setText(result.summary);

                        if (overviewPanel != null &&

                            result.upTime > 0L &&

                            result.processCpuTime >= 0L) {

                            overviewPanel.updateCPUInfo(result);

                        }

                    }

                } catch (InterruptedException ex) {

                } catch (ExecutionException ex) {

                    if (JConsole.isDebug()) {

                        ex.printStackTrace();

                    }

                }

            }

        };

    }

    StringBuilder buf;

    synchronized Result formatSummary() {

        Result result = new Result();

        ProxyClient proxyClient = vmPanel.getProxyClient();

        if (proxyClient.isDead()) {

            return null;

        }

        buf = new StringBuilder();

        append("<table cellpadding=1>");

        try {

            RuntimeMXBean         rmBean     = proxyClient.getRuntimeMXBean();

            CompilationMXBean     cmpMBean   = proxyClient.getCompilationMXBean();

            ThreadMXBean          tmBean     = proxyClient.getThreadMXBean();

            MemoryMXBean          memoryBean = proxyClient.getMemoryMXBean();

            ClassLoadingMXBean    clMBean    = proxyClient.getClassLoadingMXBean();

            OperatingSystemMXBean osMBean    = proxyClient.getOperatingSystemMXBean();

            com.sun.management.OperatingSystemMXBean sunOSMBean  =

               proxyClient.getSunOperatingSystemMXBean();

            append("<tr><td colspan=4>");

            append("<center><b>" + Messages.SUMMARY_TAB_TAB_NAME + "</b></center>");

            String dateTime =

                headerDateTimeFormat.format(System.currentTimeMillis());

            append("<center>" + dateTime + "</center>");

            append(newDivider);

            {  // VM info

                append(newLeftTable);

                append(Messages.CONNECTION_NAME, vmPanel.getDisplayName());

                append(Messages.VIRTUAL_MACHINE,

                       Resources.format(Messages.SUMMARY_TAB_VM_VERSION,

                                        rmBean.getVmName(), rmBean.getVmVersion()));

                append(Messages.VENDOR, rmBean.getVmVendor());

                append(Messages.NAME, rmBean.getName());

                append(endTable);

                append(newRightTable);

                result.upTime = rmBean.getUptime();

                append(Messages.UPTIME, formatTime(result.upTime));

                if (sunOSMBean != null) {

                    result.processCpuTime = sunOSMBean.getProcessCpuTime();

                    append(Messages.PROCESS_CPU_TIME, formatNanoTime(result.processCpuTime));

                }

                if (cmpMBean != null) {

                    append(Messages.JIT_COMPILER, cmpMBean.getName());

                    append(Messages.TOTAL_COMPILE_TIME,

                           cmpMBean.isCompilationTimeMonitoringSupported()

                                    ? formatTime(cmpMBean.getTotalCompilationTime())

                                    : Messages.UNAVAILABLE);

                } else {

                    append(Messages.JIT_COMPILER, Messages.UNAVAILABLE);

                }

                append(endTable);

            }

            append(newDivider);

            {  // Threads and Classes

                append(newLeftTable);

                int tlCount = tmBean.getThreadCount();

                int tdCount = tmBean.getDaemonThreadCount();

                int tpCount = tmBean.getPeakThreadCount();

                long ttCount = tmBean.getTotalStartedThreadCount();

                String[] strings1 = formatLongs(tlCount, tpCount,

                                                tdCount, ttCount);

                append(Messages.LIVE_THREADS, strings1[0]);

                append(Messages.PEAK, strings1[1]);

                append(Messages.DAEMON_THREADS, strings1[2]);

                append(Messages.TOTAL_THREADS_STARTED, strings1[3]);

                append(endTable);

                append(newRightTable);

                long clCount = clMBean.getLoadedClassCount();

                long cuCount = clMBean.getUnloadedClassCount();

                long ctCount = clMBean.getTotalLoadedClassCount();

                String[] strings2 = formatLongs(clCount, cuCount, ctCount);

                append(Messages.CURRENT_CLASSES_LOADED, strings2[0]);

                append(Messages.TOTAL_CLASSES_LOADED, strings2[2]);

                append(Messages.TOTAL_CLASSES_UNLOADED, strings2[1]);

                append(null, "");

                append(endTable);

            }

            append(newDivider);

            {  // Memory

                MemoryUsage u = memoryBean.getHeapMemoryUsage();

                append(newLeftTable);

                String[] strings1 = formatKByteStrings(u.getUsed(), u.getMax());

                append(Messages.CURRENT_HEAP_SIZE, strings1[0]);

                append(Messages.MAXIMUM_HEAP_SIZE, strings1[1]);

                append(endTable);

                append(newRightTable);

                String[] strings2 = formatKByteStrings(u.getCommitted());

                append(Messages.COMMITTED_MEMORY,  strings2[0]);

                append(Messages.SUMMARY_TAB_PENDING_FINALIZATION_LABEL,

                       Messages.SUMMARY_TAB_PENDING_FINALIZATION_VALUE,

                       memoryBean.getObjectPendingFinalizationCount());

                append(endTable);

                append(newTable);

                Collection<GarbageCollectorMXBean> garbageCollectors =

                                            proxyClient.getGarbageCollectorMXBeans();

                for (GarbageCollectorMXBean garbageCollectorMBean : garbageCollectors) {

                    String gcName = garbageCollectorMBean.getName();

                    long gcCount = garbageCollectorMBean.getCollectionCount();

                    long gcTime = garbageCollectorMBean.getCollectionTime();

                    append(Messages.GARBAGE_COLLECTOR,

                           Resources.format(Messages.GC_INFO, gcName, gcCount,

                                            (gcTime >= 0) ? formatTime(gcTime)

                                                 : Messages.UNAVAILABLE),

                           4);

                }

                append(endTable);

            }

            append(newDivider);

            {  // Operating System info

                append(newLeftTable);

                String osName = osMBean.getName();

                String osVersion = osMBean.getVersion();

                String osArch = osMBean.getArch();

                result.nCPUs = osMBean.getAvailableProcessors();

                append(Messages.OPERATING_SYSTEM, osName + " " + osVersion);

                append(Messages.ARCHITECTURE, osArch);

                append(Messages.NUMBER_OF_PROCESSORS, result.nCPUs+"");

                if (pathSeparator == null) {

                    // Must use separator of remote OS, not File.pathSeparator

                    // from this local VM. In the future, consider using

                    // RuntimeMXBean to get the remote system property.

                    pathSeparator = osName.startsWith("Windows ") ? ";" : ":";

                }

                if (sunOSMBean != null) {

                    String[] kbStrings1 =

                        formatKByteStrings(sunOSMBean.getCommittedVirtualMemorySize());

                    String[] kbStrings2 =

                        formatKByteStrings(sunOSMBean.getTotalPhysicalMemorySize(),

                                           sunOSMBean.getFreePhysicalMemorySize(),

                                           sunOSMBean.getTotalSwapSpaceSize(),

                                           sunOSMBean.getFreeSwapSpaceSize());

                    append(Messages.COMMITTED_VIRTUAL_MEMORY, kbStrings1[0]);

                    append(endTable);

                    append(newRightTable);

                    append(Messages.TOTAL_PHYSICAL_MEMORY, kbStrings2[0]);

                    append(Messages.FREE_PHYSICAL_MEMORY,  kbStrings2[1]);

                    append(Messages.TOTAL_SWAP_SPACE,      kbStrings2[2]);

                    append(Messages.FREE_SWAP_SPACE,       kbStrings2[3]);

                }

                append(endTable);

            }

            append(newDivider);

            {  // VM arguments and paths

                append(newTable);

                String args = "";

                java.util.List<String> inputArguments = rmBean.getInputArguments();

                for (String arg : inputArguments) {

                    args += arg + " ";

                }

                append(Messages.VM_ARGUMENTS, args, 4);

                append(Messages.CLASS_PATH,   rmBean.getClassPath(), 4);

                append(Messages.LIBRARY_PATH, rmBean.getLibraryPath(), 4);

                append(Messages.BOOT_CLASS_PATH,

                       rmBean.isBootClassPathSupported()

                                    ? rmBean.getBootClassPath()

                                    : Messages.UNAVAILABLE,

                       4);

                append(endTable);

            }

        } catch (IOException e) {

            if (JConsole.isDebug()) {

                e.printStackTrace();

            }

            proxyClient.markAsDead();

            return null;

        } catch (UndeclaredThrowableException e) {

            if (JConsole.isDebug()) {

                e.printStackTrace();

            }

            proxyClient.markAsDead();

            return null;

        }

        append("</table>");

        result.timeStamp = System.currentTimeMillis();

        result.summary = buf.toString();

        return result;

    }

    private synchronized void append(String str) {

        buf.append(str);

    }

    void append(String label, String value) {

        append(newRow(label, value));

    }

    private void append(String label, String value, int columnPerRow) {

        if (columnPerRow == 4 && pathSeparator != null) {

            value = value.replace(pathSeparator,

                                  "<b></b>" + pathSeparator);

        }

        append(newRow(label, value, columnPerRow));

    }

    OverviewPanel[] getOverviewPanels() {

        if (overviewPanel == null) {

            overviewPanel = new CPUOverviewPanel();

        }

        return new OverviewPanel[] { overviewPanel };

    }

    private static class CPUOverviewPanel extends OverviewPanel {

        private long prevUpTime, prevProcessCpuTime;

        CPUOverviewPanel() {

            super(Messages.CPU_USAGE, cpuUsageKey, Messages.CPU_USAGE, Plotter.Unit.PERCENT);

            getPlotter().setDecimals(CPU_DECIMALS);

        }

        public void updateCPUInfo(Result result) {

            if (prevUpTime > 0L && result.upTime > prevUpTime) {

                // elapsedCpu is in ns and elapsedTime is in ms.

                long elapsedCpu = result.processCpuTime - prevProcessCpuTime;

                long elapsedTime = result.upTime - prevUpTime;

                // cpuUsage could go higher than 100% because elapsedTime

                // and elapsedCpu are not fetched simultaneously. Limit to

                // 99% to avoid Plotter showing a scale from 0% to 200%.

                float cpuUsage =

                    Math.min(99F,

                             elapsedCpu / (elapsedTime * 10000F * result.nCPUs));

                cpuUsage = Math.max(0F, cpuUsage);

                getPlotter().addValues(result.timeStamp,

                                Math.round(cpuUsage * Math.pow(10.0, CPU_DECIMALS)));

                getInfoLabel().setText(Resources.format(Messages.CPU_USAGE_FORMAT,

                                               String.format("%."+CPU_DECIMALS+"f", cpuUsage)));

            }

            this.prevUpTime = result.upTime;

            this.prevProcessCpuTime = result.processCpuTime;

        }

    }

}