Update CHANGELOG.md

0.3.0

CHANGELOG.md

@@ -1,5 +1,28 @@
 # Changelog
 
+## 0.3.1
+
+* Technical fixes for compatibility with Java 8
+
+## 0.3.0
+
+* **BREAKING CHANGE**: Filters will not accept message since this update
+* New `KSLog` realization `DefaultKSLog`
+* Now platforms realize their default loggers callbacks instead of `KSLog` factories
+
+## 0.2.0
+
+* Full rewrite of API
+
+## 0.1.1
+
+* Changes in `JVM` levels
+* Fixes in TagLogger
+
+## 0.1.0
+
+* All the platform specific logged factories has been renamed
+
 ## 0.0.3
 
 * Fixes in `JVM` logging

README.md

@@ -4,6 +4,9 @@
 ![Android](https://img.shields.io/badge/Android-green?style=for-the-badge&logo=android&logoColor=white)
 ![Js](https://img.shields.io/badge/JavaScript-323330?style=for-the-badge&logo=javascript&logoColor=F7DF1E)
 
+[![KDocs](https://img.shields.io/badge/KDocs-323330?style=for-the-badge&logo=Kotlin&logoColor=7F52FF)](https://insanusmokrassar.github.io/KSLog/)
+[![Tutorials](https://img.shields.io/badge/Tutorials-0288D1?style=for-the-badge&logo=bookstack&logoColor=white)](https://bookstack.inmo.dev/books/kslog)
+
 It is simple logging tool which is using built-in tools for logging:
 
 * `java.util.logging.Logger` for `JVM`
@@ -22,18 +25,26 @@ KSLog.i("Some message")
 KSLog.i("Some tag", "Some message")
 // OR
 KSLog.i("Some tag", "Some message", IllegalArgumentException("So, that is exception :)"))
+// OR
+KSLog.i("Some optional tag", Exception("Optional")) { "Lazy inited message" }
+// OR
+KSLog.iS("Some optional tag", Exception("Optional")) { "Lazy inited message for suspendable calculation of text" }
 // OR EVEN
 KSLog.l(LogLevel.INFO, "Some tag", "Some message", IllegalArgumentException("So, that is exception :)"))
+// OR
+KSLog.l(LogLevel.INFO, "Some optional tag", IllegalArgumentException("So, that is exception :)")) { "And lazily inited message" }
 ```
 
 ### A little bit deeper
 
-There are several important things in context of this library:
+There are several important "terms" in context of this library:
 
-* Default logger (available via `KSLog`)
+* Default logger (available via `KSLog.default`)
 * Local logger (can be created via `KSLog` functions and passed anywhere as `KSLog`)
 * Logging shortcuts like `KSLog.i`/`KSLog.info`
 
+Every logging extension (like `KSLog.i`) have its analog with lazy inited message text and the same one with suffix `S` (like `KSLog.iS`) for the suspendable message calculation.
+
 Default logger can be created by passing `defaultTag` and one of variants log level filters: set or minimal loggable level. In `JVM` you also may setup any logger as base logger for default realizations of `KSLog`. Besides, you may use your own callback (on **any target platform**) as output of logging:
 
 ```kotlin

build.gradle

@@ -33,7 +33,13 @@ repositories {
 }
 
 kotlin {
-    jvm()
+    jvm {
+        compilations.main {
+            kotlinOptions {
+                jvmTarget = "1.8"
+            }
+        }
+    }
     js(IR) {
         browser()
         nodejs()
@@ -52,9 +58,8 @@ kotlin {
 }
 
 java {
-    toolchain {
-        languageVersion = JavaLanguageVersion.of(8)
-    }
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
 }
 
 apply from: "defaultAndroidSettings.gradle"

gradle.properties

@@ -9,5 +9,5 @@ android.enableJetifier=true
 # Project data
 
 group=dev.inmo
-version=0.0.3
-android_code_version=3
+version=0.3.1
+android_code_version=8

src/commonMain/kotlin/CallbackKSLog.kt

@@ -0,0 +1,7 @@
+package dev.inmo.kslog.common
+
+class CallbackKSLog(
+    private val performLogCallback: (level: LogLevel, tag: String?, message: String, throwable: Throwable?) -> Unit
+) : KSLog {
+    override fun performLog(level: LogLevel, tag: String?, message: String, throwable: Throwable?) = performLogCallback(level, tag, message, throwable)
+}

src/commonMain/kotlin/DefaultKSLog.kt

@@ -0,0 +1,40 @@
+package dev.inmo.kslog.common
+
+class DefaultKSLog(
+    private val defaultTag: String,
+    val filter: MessageFilter = { _, _, _ -> true },
+    private val messageFormatter: MessageFormatter = defaultMessageFormatter,
+    private val logging: (level: LogLevel, tag: String, message: String, throwable: Throwable?) -> Unit = defaultLogging
+) : KSLog {
+    override fun performLog(level: LogLevel, tag: String?, message: String, throwable: Throwable?) {
+        val tag = tag ?: defaultTag
+
+        if (filter(level, tag, throwable)) {
+            val text = messageFormatter(level, tag, message, throwable)
+            logging(level, tag, text, throwable)
+        }
+    }
+
+    override fun performLog(level: LogLevel, tag: String?, throwable: Throwable?, messageBuilder: () -> String) {
+        val tag = tag ?: defaultTag
+
+        if (filter(level, tag, throwable)) {
+            val text = messageFormatter(level, tag, messageBuilder(), throwable)
+            logging(level, tag, text, throwable)
+        }
+    }
+
+    override suspend fun performLogS(
+        level: LogLevel,
+        tag: String?,
+        throwable: Throwable?,
+        messageBuilder: suspend () -> String
+    ) {
+        val tag = tag ?: defaultTag
+
+        if (filter(level, tag, throwable)) {
+            val text = messageFormatter(level, tag, messageBuilder(), throwable)
+            logging(level, tag, text, throwable)
+        }
+    }
+}

src/commonMain/kotlin/Extensions.kt

@@ -2,72 +2,86 @@
 
 package dev.inmo.kslog.common
 
-inline fun KSLog.log(level: LogLevel, tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = performLog(level, tag, messageBuilder(), e)
-inline fun KSLog.log(level: LogLevel, message: String, e: Throwable? = null) = log(level, null, e) { message }
-inline fun KSLog.log(level: LogLevel, tag: String, message: String, e: Throwable? = null) = log(level, tag, e) { message }
+inline fun KSLog.log(level: LogLevel, tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = performLog(level, tag, e, messageBuilder)
+suspend inline fun KSLog.logS(level: LogLevel, tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = performLogS(level, tag, e, messageBuilder)
+inline fun KSLog.log(level: LogLevel, message: String, e: Throwable? = null) = performLog(level, message, e)
+inline fun KSLog.log(level: LogLevel, tag: String, message: String, e: Throwable? = null) = performLog(level, tag, message, e)
 
 
-inline fun KSLog.verbose(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(LogLevel.VERBOSE, tag, e, messageBuilder)
+inline fun KSLog.debug(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(LogLevel.DEBUG, tag, e, messageBuilder)
+suspend inline fun KSLog.debugS(tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = logS(LogLevel.DEBUG, tag, e, messageBuilder)
+inline fun KSLog.debug(message: String, e: Throwable? = null) = log(LogLevel.DEBUG, message, e)
+inline fun KSLog.debug(tag: String, message: String, e: Throwable? = null) = log(LogLevel.DEBUG, tag, message, e)
+
+
+inline fun KSLog.verbose(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(LogLevel.VERBOSE, tag, e, messageBuilder)
+suspend inline fun KSLog.verboseS(tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = logS(LogLevel.VERBOSE, tag, e, messageBuilder)
 inline fun KSLog.verbose(message: String, e: Throwable? = null) = log(LogLevel.VERBOSE, message, e)
 inline fun KSLog.verbose(tag: String, message: String, e: Throwable? = null) = log(LogLevel.VERBOSE, tag, message, e)
 
 
-inline fun KSLog.info(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(LogLevel.INFO, tag, e, messageBuilder)
+inline fun KSLog.info(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(LogLevel.INFO, tag, e, messageBuilder)
+suspend inline fun KSLog.infoS(tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = logS(LogLevel.INFO, tag, e, messageBuilder)
 inline fun KSLog.info(message: String, e: Throwable? = null) = log(LogLevel.INFO, message, e)
 inline fun KSLog.info(tag: String, message: String, e: Throwable? = null) = log(LogLevel.INFO, tag, message, e)
 
 
-inline fun KSLog.warning(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(LogLevel.WARNING, tag, e, messageBuilder)
+inline fun KSLog.warning(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(LogLevel.WARNING, tag, e, messageBuilder)
+suspend inline fun KSLog.warningS(tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = logS(LogLevel.WARNING, tag, e, messageBuilder)
 inline fun KSLog.warning(message: String, e: Throwable? = null) = log(LogLevel.WARNING, message, e)
 inline fun KSLog.warning(tag: String, message: String, e: Throwable? = null) = log(LogLevel.WARNING, tag, message, e)
 
 
-inline fun KSLog.error(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(LogLevel.ERROR, tag, e, messageBuilder)
+inline fun KSLog.error(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(LogLevel.ERROR, tag, e, messageBuilder)
+suspend inline fun KSLog.errorS(tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = logS(LogLevel.ERROR, tag, e, messageBuilder)
 inline fun KSLog.error(message: String, e: Throwable? = null) = log(LogLevel.ERROR, message, e)
 inline fun KSLog.error(tag: String, message: String, e: Throwable? = null) = log(LogLevel.ERROR, tag, message, e)
 
 
-inline fun KSLog.assert(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(LogLevel.ASSERT, tag, e, messageBuilder)
+inline fun KSLog.assert(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(LogLevel.ASSERT, tag, e, messageBuilder)
+suspend inline fun KSLog.assertS(tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = logS(LogLevel.ASSERT, tag, e, messageBuilder)
 inline fun KSLog.assert(message: String, e: Throwable? = null) = log(LogLevel.ASSERT, message, e)
 inline fun KSLog.assert(tag: String, message: String, e: Throwable? = null) = log(LogLevel.ASSERT, tag, message, e)
 
-
-inline fun KSLog.debug(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(LogLevel.DEBUG, tag, e, messageBuilder)
-inline fun KSLog.debug(message: String, e: Throwable? = null) = log(LogLevel.DEBUG, message, e)
-inline fun KSLog.debug(tag: String, message: String, e: Throwable? = null) = log(LogLevel.DEBUG, tag, message, e)
-
 // ----- Short names
 
 
-inline fun KSLog.l(level: LogLevel, tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(level, tag, e, messageBuilder)
+inline fun KSLog.l(level: LogLevel, tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(level, tag, e, messageBuilder)
+suspend inline fun KSLog.lS(level: LogLevel, tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = logS(level, tag, e, messageBuilder)
 inline fun KSLog.l(level: LogLevel, message: String, e: Throwable? = null) = log(level, message, e)
 inline fun KSLog.l(level: LogLevel, tag: String, message: String, e: Throwable? = null) = log(level, tag, message, e)
 
-inline fun KSLog.v(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = verbose(tag, e, messageBuilder)
+
+inline fun KSLog.d(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = debug(tag, e, messageBuilder)
+suspend inline fun KSLog.dS(tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = debugS(tag, e, messageBuilder)
+inline fun KSLog.d(message: String, e: Throwable? = null) = debug(message, e)
+inline fun KSLog.d(tag: String, message: String, e: Throwable? = null) = debug(tag, message, e)
+
+inline fun KSLog.v(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = verbose(tag, e, messageBuilder)
+suspend inline fun KSLog.vS(tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = verboseS(tag, e, messageBuilder)
 inline fun KSLog.v(message: String, e: Throwable? = null) = verbose(message, e)
 inline fun KSLog.v(tag: String, message: String, e: Throwable? = null) = verbose(tag, message, e)
 
 
-inline fun KSLog.i(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = info(tag, e, messageBuilder)
+inline fun KSLog.i(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = info(tag, e, messageBuilder)
+suspend inline fun KSLog.iS(tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = infoS(tag, e, messageBuilder)
 inline fun KSLog.i(message: String, e: Throwable? = null) = info(message, e)
 inline fun KSLog.i(tag: String, message: String, e: Throwable? = null) = info(tag, message, e)
 
 
-inline fun KSLog.w(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = warning(tag, e, messageBuilder)
+inline fun KSLog.w(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = warning(tag, e, messageBuilder)
+suspend inline fun KSLog.wS(tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = warningS(tag, e, messageBuilder)
 inline fun KSLog.w(message: String, e: Throwable? = null) = warning(message, e)
 inline fun KSLog.w(tag: String, message: String, e: Throwable? = null) = warning(tag, message, e)
 
 
-inline fun KSLog.e(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = error(tag, e, messageBuilder)
+inline fun KSLog.e(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = error(tag, e, messageBuilder)
+suspend inline fun KSLog.eS(tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = errorS(tag, e, messageBuilder)
 inline fun KSLog.e(message: String, e: Throwable? = null) = error(message, e)
 inline fun KSLog.e(tag: String, message: String, e: Throwable? = null) = error(tag, message, e)
 
 
-inline fun KSLog.wtf(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = assert(tag, e, messageBuilder)
+inline fun KSLog.wtf(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = assert(tag, e, messageBuilder)
+suspend inline fun KSLog.wtfS(tag: String? = null, e: Throwable? = null, noinline messageBuilder: suspend () -> String) = assertS(tag, e, messageBuilder)
 inline fun KSLog.wtf(message: String, e: Throwable? = null) = assert(message, e)
 inline fun KSLog.wtf(tag: String, message: String, e: Throwable? = null) = assert(tag, message, e)
-
-
-inline fun KSLog.d(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = debug(tag, e, messageBuilder)
-inline fun KSLog.d(message: String, e: Throwable? = null) = debug(message, e)
-inline fun KSLog.d(tag: String, message: String, e: Throwable? = null) = debug(tag, message, e)

src/commonMain/kotlin/KSLog.kt

@@ -2,16 +2,29 @@ package dev.inmo.kslog.common
 
 
 enum class LogLevel {
+    DEBUG,
     VERBOSE,
     INFO,
     WARNING,
     ERROR,
     ASSERT,
-    DEBUG
 }
 
 interface KSLog {
     fun performLog(level: LogLevel, tag: String?, message: String, throwable: Throwable?)
+    fun performLog(level: LogLevel, message: String, throwable: Throwable?) = performLog(level, null, message, throwable)
+    fun performLog(
+        level: LogLevel,
+        tag: String?,
+        throwable: Throwable?,
+        messageBuilder: () -> String
+    ) = performLog(level, tag, messageBuilder(), throwable)
+    suspend fun performLogS(
+        level: LogLevel,
+        tag: String?,
+        throwable: Throwable?,
+        messageBuilder: suspend () -> String
+    ) = performLog(level, tag, messageBuilder(), throwable)
     companion object : KSLog {
         private var defaultLogger: KSLog? = null
         var default: KSLog
@@ -24,44 +37,64 @@ interface KSLog {
                 defaultLogger = value
             }
         override fun performLog(level: LogLevel, tag: String?, message: String, throwable: Throwable?) = default.performLog(level, tag, message, throwable)
+        override fun performLog(level: LogLevel, message: String, throwable: Throwable?) = default.performLog(level, message, throwable)
+        override fun performLog(
+            level: LogLevel,
+            tag: String?,
+            throwable: Throwable?,
+            messageBuilder: () -> String
+        ) = default.performLog(level, tag, throwable, messageBuilder)
+        override suspend fun performLogS(
+            level: LogLevel,
+            tag: String?,
+            throwable: Throwable?,
+            messageBuilder: suspend () -> String
+        ) = default.performLogS(level, tag, throwable, messageBuilder)
     }
 }
 
 
 operator fun KSLog.invoke(performLogCallback: (level: LogLevel, tag: String?, message: String, throwable: Throwable?) -> Unit) = CallbackKSLog(performLogCallback)
 
-class CallbackKSLog(
-    private val performLogCallback: (level: LogLevel, tag: String?, message: String, throwable: Throwable?) -> Unit
-) : KSLog {
-    override fun performLog(level: LogLevel, tag: String?, message: String, throwable: Throwable?) = performLogCallback(level, tag, message, throwable)
-}
-
-
-expect fun KSLog(
-    defaultTag: String,
-    filter: (l: LogLevel, t: String, m: String, Throwable?) -> Boolean
-) : KSLog
+internal expect val defaultLogging: (level: LogLevel, tag: String, message: String, throwable: Throwable?) -> Unit
 
 fun KSLog(
     defaultTag: String,
-    levels: Iterable<LogLevel>
+    filter: MessageFilter = { _, _, _ -> true },
+    messageFormatter: MessageFormatter = defaultMessageFormatter
+): KSLog = DefaultKSLog(
+    defaultTag,
+    filter,
+    messageFormatter
+)
+
+fun KSLog(
+    defaultTag: String,
+    levels: Iterable<LogLevel>,
+    messageFormatter: MessageFormatter = defaultMessageFormatter
 ): KSLog {
     val levels = levels.toSet()
-    return KSLog (defaultTag) { l, _, _, _ ->
+    return KSLog (defaultTag, { l, _, _ ->
         l in levels
-    }
+    }, messageFormatter)
 }
 
-inline fun KSLog(
+fun KSLog(
     defaultTag: String,
     firstLevel: LogLevel,
     secondLevel: LogLevel,
-    vararg otherLevels: LogLevel
-): KSLog = KSLog(defaultTag, setOf(firstLevel, secondLevel, *otherLevels))
+    vararg otherLevels: LogLevel,
+    messageFormatter: MessageFormatter = defaultMessageFormatter,
+): KSLog = KSLog(defaultTag, setOf(firstLevel, secondLevel, *otherLevels), messageFormatter)
 
 fun KSLog(
     defaultTag: String,
-    minLoggingLevel: LogLevel = LogLevel.VERBOSE
-): KSLog = KSLog (defaultTag) { l, _, _, _ ->
+    minLoggingLevel: LogLevel,
+    messageFormatter: MessageFormatter = defaultMessageFormatter,
+): KSLog = KSLog (
+    defaultTag,
+    { l, _, _ ->
         minLoggingLevel.ordinal <= l.ordinal
-}
+    },
+    messageFormatter
+)

src/commonMain/kotlin/KSLogTypealiases.kt

@@ -0,0 +1,6 @@
+package dev.inmo.kslog.common
+
+typealias MessageFormatter = (l: LogLevel, t: String, m: String, Throwable?) -> String
+typealias MessageFilter = (l: LogLevel, t: String?, Throwable?) -> Boolean
+val defaultMessageFormatter: MessageFormatter = { l, t, m, _ -> "[$l] $t - $m" }
+

src/commonMain/kotlin/TagLogger.kt

@@ -5,6 +5,6 @@ import kotlin.jvm.JvmInline
 @JvmInline
 value class TagLogger(val tag: String) : KSLog {
     override fun performLog(level: LogLevel, tag: String?, message: String, throwable: Throwable?) {
-        KSLog.performLog(level, tag ?: tag, message, throwable)
+        KSLog.performLog(level, tag ?: this.tag, message, throwable)
     }
 }

src/jsMain/kotlin/ActualLogger.kt

@@ -1,30 +1,15 @@
 package dev.inmo.kslog.common
 
-fun KSLog(
-    messageFormatter: (l: LogLevel, t: String?, m: String, Throwable?) -> String,
-    filter: (l: LogLevel, t: String?, m: String, Throwable?) -> Boolean
-) = KSLog { l, t, m, e ->
-    if (!filter(l, t, m, e)) return@KSLog
-    val text = messageFormatter(l,t,m,e)
+internal actual val defaultLogging: (level: LogLevel, tag: String, message: String, throwable: Throwable?) -> Unit = { l, t, m, e ->
     val args = e ?.let {
-        arrayOf(text, e)
-    } ?: arrayOf(text)
+        arrayOf(m, e)
+    } ?: arrayOf(m)
     when (l) {
+        LogLevel.DEBUG -> console.log(*args)
         LogLevel.VERBOSE,
         LogLevel.INFO -> console.info(*args)
         LogLevel.WARNING -> console.warn(*args)
         LogLevel.ERROR,
         LogLevel.ASSERT -> console.error(*args)
-        LogLevel.DEBUG -> console.log(*args)
     }
 }
-
-actual fun KSLog(
-    defaultTag: String,
-    filter: (l: LogLevel, t: String, m: String, Throwable?) -> Boolean
-): KSLog {
-    return KSLog(
-        { l, t, m, _ -> "[$l] ${t ?: defaultTag} - $m" },
-        { l, t, m, e -> filter(l, t ?: defaultTag, m, e) }
-    )
-}

src/jvmMain/kotlin/ActualLogger.kt

@@ -1,46 +1,62 @@
 package dev.inmo.kslog.common
 
 import java.util.logging.Level
+import java.util.logging.Logger
 
-fun KSLog(
-    logger: java.util.logging.Logger,
-    filter: (l: LogLevel, t: String?, m: String, Throwable?) -> Boolean,
-    messageFormatter: (l: LogLevel, t: String?, m: String, Throwable?) -> String
-) = KSLog { l, t, m, e ->
-    if (!filter(l, t, m, e)) return@KSLog
-    val text = messageFormatter(l,t,m,e)
-    logger.log(
+private val defaultKSLogLogger by lazy {
+    Logger.getLogger("KSLog")
+}
+private fun Logger.doLog(
+    l: LogLevel, t: String, m: String, e: Throwable?
+) = log(
     when(l) {
-            LogLevel.VERBOSE -> Level.FINEST
+        LogLevel.DEBUG -> Level.FINEST
+        LogLevel.VERBOSE -> Level.FINE
         LogLevel.INFO -> Level.INFO
         LogLevel.WARNING -> Level.WARNING
         LogLevel.ERROR -> Level.SEVERE
-            LogLevel.ASSERT -> Level.OFF
-            LogLevel.DEBUG -> Level.ALL
+        LogLevel.ASSERT -> Level.SEVERE
     },
-        text,
+    m,
     e
-    )
+)
+internal actual val defaultLogging: (level: LogLevel, tag: String, message: String, throwable: Throwable?) -> Unit = { l, t, m, e ->
+    defaultKSLogLogger.doLog(l, t, m, e)
 }
 
 fun KSLog(
     defaultTag: String,
-    logger: java.util.logging.Logger,
-    filter: (l: LogLevel, t: String, m: String, Throwable?) -> Boolean = { _, _, _, _ -> true }
-): KSLog {
-    return KSLog(
-        logger,
-        { l, t, m, e -> filter(l, t ?: defaultTag, m, e) }
-    ) { _, t, m, _ -> "${t ?: defaultTag} - $m" }
+    logger: Logger,
+    filter: MessageFilter = { _, _, _ -> true },
+    messageFormatter: MessageFormatter = defaultMessageFormatter
+) = KSLog { l, t, m, e ->
+    if (!filter(l, t, e)) return@KSLog
+    val text = messageFormatter(l,t ?: defaultTag,m,e)
+    logger.doLog(l, t ?: defaultTag, text, e)
 }
 
-actual fun KSLog(
+fun KSLog(
     defaultTag: String,
-    filter: (l: LogLevel, t: String, m: String, Throwable?) -> Boolean
+    logger: Logger,
+    levels: Iterable<LogLevel>,
+    messageFormatter: MessageFormatter = defaultMessageFormatter
 ): KSLog {
-    return KSLog(
-        defaultTag,
-        logger = java.util.logging.Logger.getAnonymousLogger(),
-        filter = { l, t, m, e -> filter(l, t, m, e) }
-    )
+    val levels = levels.toSet()
+    return KSLog (defaultTag, logger, { l, _, _ -> l in levels }, messageFormatter)
 }
+
+fun KSLog(
+    defaultTag: String,
+    logger: Logger,
+    firstLevel: LogLevel,
+    secondLevel: LogLevel,
+    vararg otherLevels: LogLevel,
+    messageFormatter: MessageFormatter = defaultMessageFormatter,
+): KSLog = KSLog (defaultTag, logger, setOf(firstLevel, secondLevel, *otherLevels), messageFormatter)
+
+fun KSLog(
+    defaultTag: String,
+    logger: Logger,
+    minLoggingLevel: LogLevel = LogLevel.values().first(),
+    messageFormatter: MessageFormatter = defaultMessageFormatter
+): KSLog = KSLog (defaultTag, logger, { l, _, _ -> minLoggingLevel.ordinal <= l.ordinal }, messageFormatter)

src/main/kotlin/ActualLogger.kt

@@ -2,20 +2,14 @@ package dev.inmo.kslog.common
 
 import android.util.Log
 
-actual fun KSLog(
-    defaultTag: String,
-    filter: (l: LogLevel, t: String, m: String, Throwable?) -> Boolean
-): KSLog {
-    return KSLog { l, t, m, e ->
-        val tag = t ?: defaultTag
-        if (!filter(l, t ?: defaultTag, m, e)) return@KSLog
+
+internal actual val defaultLogging: (level: LogLevel, tag: String, message: String, throwable: Throwable?) -> Unit = { l, t, m, e ->
     when(l) {
-            LogLevel.VERBOSE -> Log.v(tag, m, e)
-            LogLevel.INFO -> Log.i(tag, m, e)
-            LogLevel.WARNING -> Log.w(tag, m, e)
-            LogLevel.ERROR -> Log.e(tag, m, e)
-            LogLevel.ASSERT -> Log.wtf(tag, m, e)
-            LogLevel.DEBUG -> Log.d(tag, m, e)
-        }
+        LogLevel.DEBUG -> Log.d(t, m, e)
+        LogLevel.VERBOSE -> Log.v(t, m, e)
+        LogLevel.INFO -> Log.i(t, m, e)
+        LogLevel.WARNING -> Log.w(t, m, e)
+        LogLevel.ERROR -> Log.e(t, m, e)
+        LogLevel.ASSERT -> Log.wtf(t, m, e)
     }
 }