Twidere-App-Android-Twitter.../twidere/src/main/java/edu/tsinghua/hotmobi/WriteLogTask.java

123 lines
4.4 KiB
Java

/*
* Twidere - Twitter client for Android
*
* Copyright (C) 2012-2015 Mariotaku Lee <mariotaku.lee@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package edu.tsinghua.hotmobi;
import android.content.Context;
import android.content.SharedPreferences;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import android.util.Log;
import org.mariotaku.twidere.BuildConfig;
import org.mariotaku.twidere.Constants;
import org.mariotaku.twidere.model.UserKey;
import org.mariotaku.twidere.util.JsonSerializer;
import org.mariotaku.twidere.util.Utils;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;
import java.util.Collections;
import java.util.List;
import edu.tsinghua.hotmobi.model.LogModel;
/**
* Created by mariotaku on 15/8/23.
*/
public class WriteLogTask<T extends LogModel> implements Runnable, Constants {
private static final byte[] LF = {'\n'};
private final Context context;
private final UserKey accountKey;
private final String type;
private final List<T> events;
@Nullable
private final PreProcessing<T> preProcessing;
public WriteLogTask(Context context, UserKey accountKey, T event, @Nullable PreProcessing<T> preProcessing) {
this(context, accountKey, HotMobiLogger.getLogFilename(event), Collections.singletonList(event), preProcessing);
}
public WriteLogTask(Context context, UserKey accountKey, String type, List<T> events,
@Nullable PreProcessing<T> preProcessing) {
this.context = context;
this.accountKey = accountKey;
this.type = type;
this.events = events;
this.preProcessing = preProcessing;
}
@Override
public void run() {
final SharedPreferences prefs = context.getSharedPreferences(SHARED_PREFERENCES_NAME,
Context.MODE_PRIVATE);
if (!prefs.getBoolean(KEY_USAGE_STATISTICS, false)) return;
RandomAccessFile raf = null;
FileChannel fc = null;
try {
raf = new RandomAccessFile(HotMobiLogger.getLogFile(context, accountKey, type), "rw");
fc = raf.getChannel();
final FileLock lock = fc.lock();
for (T event : events) {
if (preProcessing != null) {
preProcessing.process(event, context);
}
if (BuildConfig.DEBUG) {
if (accountKey != null) {
Log.v(HotMobiLogger.LOGTAG, "Log " + type + " for account " + accountKey + ": " + event);
} else {
Log.v(HotMobiLogger.LOGTAG, "Log " + type + ": " + event);
}
}
final String serialize = JsonSerializer.serialize(event);
if (TextUtils.isEmpty(serialize)) continue;
final byte[] bytes = serialize.getBytes("UTF-8");
final long start = raf.length();
final ByteBuffer bb;
if (start == 0) {
// Don't write line break
bb = ByteBuffer.allocate(bytes.length);
} else {
bb = ByteBuffer.allocate(bytes.length + LF.length);
bb.put(LF);
bb.position(LF.length);
}
bb.put(bytes);
bb.rewind();
fc.position(start);
while (bb.hasRemaining()) {
fc.write(bb);
}
}
lock.release();
} catch (IOException e) {
Log.w(HotMobiLogger.LOGTAG, e);
} finally {
Utils.closeSilently(fc);
Utils.closeSilently(raf);
}
}
}