Android Open Source - cwp-morse-mangle Event Log

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License

The source code is released under:

Copyright (C) 2012 Jussi Kivilinna <jussi.kivilinna@gmail.com> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "S...

Java Source Code

/*
 * Copyright (C) 2012 Jussi Kivilinna <jussi.kivilinna@gmail.com>
 */* ww w  .ja  va 2 s .  c o m*/
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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.
 *
 */

package fi_81.cwp_morse_mangle;

import java.util.concurrent.atomic.AtomicLong;

import android.os.Debug;
import android.util.Log;

/* Log wrapper with on/off switch and formatting input */
public class EventLog {
  private static final boolean logging = false;
  private static final boolean profiling = false;
  private static final boolean tracing = false;
  private static final AtomicLong recvSignalTime = new AtomicLong(0);
  private static final AtomicLong sendSignalTime = new AtomicLong(0);

  /* Tracing dumps to sd-card */
  public static void startTracing() {
    if (tracing)
      Debug.startMethodTracing("cwp_morse_mangle");

    if (profiling)
      Debug.startAllocCounting();
  }

  public static void endTracing() {
    if (tracing)
      Debug.stopMethodTracing();
  }

  /*
   * Performance profiling for received signals.
   * 
   * Note: this is racy, works only when intervals of signals are ~50ms more
   */
  public static void startProfRecv(long timeReceived) {
    if (profiling) {
      recvSignalTime.set(timeReceived);

      StringBuffer sb = localStringBuffer.get();
      int allocs = Debug.getThreadAllocCount();
      int size = Debug.getThreadAllocSize();

      sb.setLength(0);
      sb.append("received signal from network. Memory (used/allocs): ");
      sb.append(size);
      sb.append('/');
      sb.append(allocs);

      Log.d("profiler", sb.toString());
    }
  }

  public static void endProfRecv(long timeProcessed, String info,
      long infoValue) {
    if (profiling) {
      long recvTime = recvSignalTime.getAndSet(0);
      if (recvTime == 0)
        return;

      StringBuffer sb = localStringBuffer.get();
      long duration = timeProcessed - recvTime;
      int allocs = Debug.getThreadAllocCount();
      int size = Debug.getThreadAllocSize();

      sb.setLength(0);
      sb.append("duration receiving signal from network to handling: ");
      sb.append(duration);
      sb.append(" ms (");
      sb.append(info);
      sb.append(infoValue);
      sb.append("). Memory (used/allocs): ");
      sb.append(size);
      sb.append('/');
      sb.append(allocs);

      Log.d("profiler", sb.toString());
    }
  }

  public static void startProfSend(long timeReceived, String info) {
    if (profiling) {
      sendSignalTime.set(timeReceived);

      StringBuffer sb = localStringBuffer.get();
      int allocs = Debug.getThreadAllocCount();
      int size = Debug.getThreadAllocSize();

      sb.setLength(0);
      sb.append("sending signal (");
      sb.append(info);
      sb.append("). Memory (used/allocs): ");
      sb.append(size);
      sb.append('/');
      sb.append(allocs);

      Log.d("profiler", sb.toString());
    }
  }

  public static void endProfSend(long timeProcessed) {
    if (profiling) {
      long sendTime = sendSignalTime.getAndSet(0);
      if (sendTime == 0)
        return;

      StringBuffer sb = localStringBuffer.get();
      long duration = timeProcessed - sendTime;
      int allocs = Debug.getThreadAllocCount();
      int size = Debug.getThreadAllocSize();

      sb.setLength(0);
      sb.append("duration from sending signal to network: ");
      sb.append(duration);
      sb.append(" ms. Memory (used/allocs): ");
      sb.append(size);
      sb.append('/');
      sb.append(allocs);

      Log.d("profiler", sb.toString());
    }
  }

  /* Log.[deiw] wrappers */
  public static void d(String tag, String info) {
    if (logging)
      Log.d(tag, info);
  }

  public static void i(String tag, String info) {
    if (logging)
      Log.i(tag, info);
  }

  public static void w(String tag, String info) {
    if (logging)
      Log.w(tag, info);
  }

  public static void e(String tag, String info) {
    if (logging)
      Log.e(tag, info);
  }

  /* Cached thread-local objects to reduce memory allocations */
  private final static ThreadLocal<StringBuffer> localStringBuffer = new ThreadLocal<StringBuffer>() {
    @Override
    protected StringBuffer initialValue() {
      return new StringBuffer();
    }
  };
}

Java Source Code List

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