Logger for debug logs
parent
6b08074a70
commit
c09dd92cff
@ -0,0 +1,128 @@
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package org.koitharu.kotatsu.core.logs
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import android.content.Context
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import androidx.annotation.WorkerThread
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import kotlinx.coroutines.Dispatchers
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import kotlinx.coroutines.Job
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import kotlinx.coroutines.cancelAndJoin
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import kotlinx.coroutines.delay
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import kotlinx.coroutines.launch
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import kotlinx.coroutines.runInterruptible
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import kotlinx.coroutines.sync.Mutex
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import kotlinx.coroutines.sync.withLock
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import org.koitharu.kotatsu.core.prefs.AppSettings
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import org.koitharu.kotatsu.utils.ext.printStackTraceDebug
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import org.koitharu.kotatsu.utils.ext.processLifecycleScope
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import org.koitharu.kotatsu.utils.ext.runCatchingCancellable
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import org.koitharu.kotatsu.utils.ext.subdir
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import java.io.File
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import java.io.FileOutputStream
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import java.text.SimpleDateFormat
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import java.util.Date
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import java.util.Locale
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import java.util.concurrent.ConcurrentLinkedQueue
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private const val DIR = "logs"
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private const val FLUSH_DELAY = 2_000L
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private const val MAX_SIZE_BYTES = 1024 * 1024 // 1 MB
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class FileLogger(
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context: Context,
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private val settings: AppSettings,
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name: String,
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) {
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val file by lazy {
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val dir = context.getExternalFilesDir(DIR) ?: context.filesDir.subdir(DIR)
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File(dir, "$name.log")
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}
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val isEnabled: Boolean
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get() = settings.isLoggingEnabled
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private val dateFormat = SimpleDateFormat.getDateTimeInstance(
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SimpleDateFormat.SHORT,
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SimpleDateFormat.SHORT,
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Locale.ROOT,
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)
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private val buffer = ConcurrentLinkedQueue<String>()
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private val mutex = Mutex()
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private var flushJob: Job? = null
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fun log(message: String, e: Throwable? = null) {
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if (!isEnabled) {
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return
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}
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val text = buildString {
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append(dateFormat.format(Date()))
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append(": ")
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if (e != null) {
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append("E!")
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}
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append(message)
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if (e != null) {
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append(' ')
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append(e.stackTraceToString())
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appendLine()
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}
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}
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buffer.add(text)
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postFlush()
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}
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suspend fun flush() {
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if (!isEnabled) {
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return
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}
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flushJob?.cancelAndJoin()
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flushImpl()
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}
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private fun postFlush() {
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if (flushJob?.isActive == true) {
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return
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}
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flushJob = processLifecycleScope.launch(Dispatchers.Default) {
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delay(FLUSH_DELAY)
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runCatchingCancellable {
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flushImpl()
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}.onFailure {
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it.printStackTraceDebug()
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}
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}
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}
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private suspend fun flushImpl() {
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mutex.withLock {
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if (buffer.isEmpty()) {
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return
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}
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runInterruptible(Dispatchers.IO) {
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if (file.length() > MAX_SIZE_BYTES) {
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rotate()
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}
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FileOutputStream(file, true).use {
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while (true) {
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val message = buffer.poll() ?: break
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it.write(message.toByteArray())
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it.write('\n'.code)
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}
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it.flush()
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}
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}
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}
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}
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@WorkerThread
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private fun rotate() {
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val length = file.length()
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val bakFile = File(file.parentFile, file.name + ".bak")
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file.renameTo(bakFile)
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bakFile.inputStream().use { input ->
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input.skip(length - MAX_SIZE_BYTES / 2)
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file.outputStream().use { output ->
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input.copyTo(output)
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output.flush()
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}
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}
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bakFile.delete()
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}
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}
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@ -0,0 +1,10 @@
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package org.koitharu.kotatsu.core.logs
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import javax.inject.Qualifier
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@Qualifier
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@Retention(AnnotationRetention.BINARY)
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annotation class TrackerLogger
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@ -0,0 +1,31 @@
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package org.koitharu.kotatsu.core.logs
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import android.content.Context
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import androidx.collection.arraySetOf
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import dagger.Module
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import dagger.Provides
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import dagger.hilt.InstallIn
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import dagger.hilt.android.qualifiers.ApplicationContext
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import dagger.hilt.components.SingletonComponent
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import dagger.multibindings.ElementsIntoSet
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import org.koitharu.kotatsu.core.prefs.AppSettings
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@Module
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@InstallIn(SingletonComponent::class)
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object LoggersModule {
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@Provides
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@TrackerLogger
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fun provideTrackerLogger(
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@ApplicationContext context: Context,
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settings: AppSettings,
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) = FileLogger(context, settings, "tracker")
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@Provides
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@ElementsIntoSet
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fun provideAllLoggers(
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@TrackerLogger trackerLogger: FileLogger,
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): Set<@JvmSuppressWildcards FileLogger> = arraySetOf(
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trackerLogger,
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)
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}
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