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ThreadData.java

/*
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 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common
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package org.netbeans.lib.profiler.results.threads;

import org.netbeans.lib.profiler.global.CommonConstants;
import java.awt.*;


/**
 * A representation of the thread timeline data for a single thread
 *
 * @author Misha Dmitriev
 */
00052 public class ThreadData {
    //~ Static fields/initializers -----------------------------------------------------------------------------------------------

    static final byte NO_STATE = 127;

    //~ Instance fields ----------------------------------------------------------------------------------------------------------

    private final Object dataLock = new Object();
    private String className;
    private String name;
    private byte[] threadStates; // Array of states corresponding to above timestamps
                                 // @GuardedBy dataLock

    // @GuardedBy dataLock
    private long[] timeStamps; // Array of points in time at which thread's state changes
                               // @GuardedBy dataLock

    // @GuardedBy dataLock
    private int capacity;
    private int curSize;

    //~ Constructors -------------------------------------------------------------------------------------------------------------

    public ThreadData(String name, String className) {
        synchronized (dataLock) {
            capacity = 50;
            timeStamps = new long[capacity];
            threadStates = new byte[capacity];
            curSize = 0;
        }

        this.name = name;
        this.className = className;
    }

    //~ Methods ------------------------------------------------------------------------------------------------------------------

    public String getClassName() {
        return className;
    }

    public byte getFirstState() {
        synchronized (dataLock) {
            if (curSize == 0) {
                return NO_STATE;
            } else {
                return threadStates[0];
            }
        }
    }

    public long getFirstTimeStamp() {
        synchronized (dataLock) {
            if (curSize == 0) {
                return 0;
            } else {
                return timeStamps[0];
            }
        }
    }

    public byte getLastState() {
        synchronized (dataLock) {
            if (curSize == 0) {
                return NO_STATE;
            } else {
                return threadStates[curSize - 1];
            }
        }
    }

    public long getLastTimeStamp() {
        synchronized (dataLock) {
            if (curSize == 0) {
                return 0;
            } else {
                return timeStamps[curSize - 1];
            }
        }
    }

    public String getName() {
        return name;
    }

    public byte getStateAt(int idx) {
        synchronized (dataLock) {
            return threadStates[idx];
        }
    }

    public static Color getThreadStateColor(int threadState) {
        switch (threadState) {
            case CommonConstants.THREAD_STATUS_UNKNOWN:
                return CommonConstants.THREAD_STATUS_UNKNOWN_COLOR;
            case CommonConstants.THREAD_STATUS_ZOMBIE:
                return CommonConstants.THREAD_STATUS_ZOMBIE_COLOR;
            case CommonConstants.THREAD_STATUS_RUNNING:
                return CommonConstants.THREAD_STATUS_RUNNING_COLOR;
            case CommonConstants.THREAD_STATUS_SLEEPING:
                return CommonConstants.THREAD_STATUS_SLEEPING_COLOR;
            case CommonConstants.THREAD_STATUS_MONITOR:
                return CommonConstants.THREAD_STATUS_MONITOR_COLOR;
            case CommonConstants.THREAD_STATUS_WAIT:
                return CommonConstants.THREAD_STATUS_WAIT_COLOR;
            default:
                return CommonConstants.THREAD_STATUS_UNKNOWN_COLOR;
        }
    }

    public Color getThreadStateColorAt(int idx) {
        synchronized (dataLock) {
            return getThreadStateColor(threadStates[idx]);
        }
    }

    public long getTimeStampAt(int idx) {
        synchronized (dataLock) {
            return timeStamps[idx];
        }
    }

    public void add(long timeStamp, byte threadState) {
        synchronized (dataLock) {
            if (curSize == capacity) {
                long[] oldStamps = timeStamps;
                byte[] oldStates = threadStates;
                int oldCapacity = capacity;
                capacity = capacity * 2;
                timeStamps = new long[capacity];
                threadStates = new byte[capacity];
                System.arraycopy(oldStamps, 0, timeStamps, 0, oldCapacity);
                System.arraycopy(oldStates, 0, threadStates, 0, oldCapacity);
            }

            timeStamps[curSize] = timeStamp;
            threadStates[curSize] = threadState;
            curSize++;
        }
    }

    public void clearStates() {
        synchronized (dataLock) {
            capacity = 50;
            timeStamps = new long[capacity];
            threadStates = new byte[capacity];
            curSize = 0;
        }
    }

    public int size() {
        synchronized (dataLock) {
            return curSize;
        }
    }
}

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