Merge pull request #4 from InsanusMokrassar/0.4.1

Managers

CHANGELOG.md

@@ -12,6 +12,15 @@
 * Now `SauceNaoAPI` working with synchronous queue
 * `SauceNaoAPI` now will wait for some time when one of limits will be achieved
 
+### 0.4.1 Managers experiments and row format in answer
+
+* Add `TimeManager` - it will manage work with requests times
+* Add `RequestQuotaMagager` - it will manage quota for requests and call suspend
+if they will be over
+* `SauceNaoAPI` now working (almost) asynchronously
+* Now `SauceNaoAnswer` have field `row` which contains `JsonObject` with
+all original answer fields
+
 ## 0.3.0
 
 * Now `results` field of `SauceNaoAnswer` is optional and is empty list by default

README.md

@@ -1 +1,25 @@
-# SauceNaoAPI
+# SauceNaoAPI
+
+It is wrapper for [SauceNAO](https://saucenao.com/) API. For now, library is
+in preview state. It can be fully used, but some of info can be unavailable from
+wrapper classes, but now you can access them via `SauceNaoAnswer#row` field.
+
+## Requester
+
+For the requests we are using `SauceNaoAPI` object. Unfortunately, for now it
+supports only url strings as source of request. For example:
+
+```kotlin
+val key = // here must be your Sauce NAO API key
+val requestUrl = // here must be your link to some image
+
+val api = SauceNaoAPI(key)
+api.use {
+    println(
+        it.request(requestUrl)
+    )
+}
+```
+
+Most of others requests use the same etymology and meaning as in the
+`SauceNAO` API docs.

build.gradle

@@ -1,4 +1,4 @@
-project.version = "0.4.0"
+project.version = "0.4.1"
 project.group = "com.github.insanusmokrassar"
 
 buildscript {
@@ -15,7 +15,6 @@ buildscript {
     }
 }
 
-apply plugin: 'java-library'
 apply plugin: 'kotlin'
 apply plugin: 'kotlinx-serialization'
 

src/main/kotlin/com/github/insanusmokrassar/SauceNaoAPI/Launcher.kt

@@ -2,15 +2,13 @@ package com.github.insanusmokrassar.SauceNaoAPI
 
 import kotlinx.coroutines.*
 
-fun main(vararg args: String) {
+suspend fun main(vararg args: String) {
     val (key, requestUrl) = args
 
-    runBlocking {
+    val api = SauceNaoAPI(key, scope = GlobalScope)
-        val api = SauceNaoAPI(key, scope = GlobalScope)
+    api.use {
-        api.use {
+        println(
-            println(
+            it.request(requestUrl)
-                it.request(requestUrl)
+        )
-            )
-        }
     }
 }

src/main/kotlin/com/github/insanusmokrassar/SauceNaoAPI/SauceNaoAPI.kt

@@ -4,6 +4,8 @@ import com.github.insanusmokrassar.SauceNaoAPI.additional.LONG_TIME_RECALCULATIN
 import com.github.insanusmokrassar.SauceNaoAPI.additional.SHORT_TIME_RECALCULATING_MILLIS
 import com.github.insanusmokrassar.SauceNaoAPI.exceptions.sauceNaoAPIException
 import com.github.insanusmokrassar.SauceNaoAPI.models.SauceNaoAnswer
+import com.github.insanusmokrassar.SauceNaoAPI.utils.*
+import com.github.insanusmokrassar.SauceNaoAPI.utils.calculateSleepTime
 import io.ktor.client.HttpClient
 import io.ktor.client.engine.okhttp.OkHttp
 import io.ktor.client.features.ClientRequestException
@@ -38,31 +40,24 @@ data class SauceNaoAPI(
     private val logger = Logger.getLogger("SauceNaoAPI")
 
     private val requestsChannel = Channel<Pair<Continuation<SauceNaoAnswer>, HttpRequestBuilder>>(Channel.UNLIMITED)
-    private val requestsSendTimes = mutableListOf<DateTime>()
+    private val timeManager = TimeManager(scope)
+    private val quotaManager = RequestQuotaManager(scope)
 
-    init {
+    private val requestsJob = scope.launch {
-        scope.launch {
+        for ((callback, requestBuilder) in requestsChannel) {
-            for ((callback, requestBuilder) in requestsChannel) {
+            quotaManager.getQuota()
+            launch {
                 try {
                     val answer = makeRequest(requestBuilder)
                     callback.resumeWith(Result.success(answer))
 
-                    val sleepUntil = if (answer.header.longRemaining < 1) {
+                    quotaManager.updateQuota(answer.header, timeManager)
-                        getMostOldestInLongPeriod() ?.plusMillis(LONG_TIME_RECALCULATING_MILLIS)
-                    } else {
-                        if (answer.header.shortRemaining < 1) {
-                            getMostOldestInShortPeriod() ?.plusMillis(SHORT_TIME_RECALCULATING_MILLIS)
-                        } else {
-                            null
-                        }
-                    }
-
-                    sleepUntil ?.also { _ ->
-                        logger.warning("LONG LIMIT REACHED, SLEEP UNTIL $sleepUntil")
-                        delay(sleepUntil.millis - DateTime.now().millis)
-                    }
                 } catch (e: Exception) {
-                    callback.resumeWith(Result.failure(e))
+                    try {
+                        callback.resumeWith(Result.failure(e))
+                    } catch (e: IllegalStateException) { // may happen when already resumed and api was closed
+                        // do nothing
+                    }
                 }
             }
         }
@@ -121,7 +116,7 @@ data class SauceNaoAPI(
             val call = client.execute(builder)
             val answerText = call.response.readText()
             logger.info(answerText)
-            addRequestTimesAndClear()
+            timeManager.addTimeAndClear()
             Json.nonstrict.parse(
                 SauceNaoAnswer.serializer(),
                 answerText
@@ -131,40 +126,6 @@ data class SauceNaoAPI(
         }
     }
 
-    private fun addRequestTimesAndClear() {
-        val newDateTime = DateTime.now()
-
-        clearRequestTimes(newDateTime)
-
-        requestsSendTimes.add(newDateTime)
-    }
-
-    private fun clearRequestTimes(relatedTo: DateTime = DateTime.now()) {
-        val limitValue = relatedTo.minusMillis(LONG_TIME_RECALCULATING_MILLIS)
-
-        requestsSendTimes.removeAll {
-            it < limitValue
-        }
-    }
-
-    private fun getMostOldestInLongPeriod(): DateTime? {
-        clearRequestTimes()
-
-        return requestsSendTimes.min()
-    }
-
-    private fun getMostOldestInShortPeriod(): DateTime? {
-        val now = DateTime.now()
-
-        val limitTime = now.minusMillis(SHORT_TIME_RECALCULATING_MILLIS)
-
-        clearRequestTimes(now)
-
-        return requestsSendTimes.asSequence().filter {
-            limitTime < it
-        }.min()
-    }
-
     private suspend fun makeRequest(
         url: String,
         db: Int? = null,
@@ -193,6 +154,8 @@ data class SauceNaoAPI(
     override fun close() {
         requestsChannel.close()
         client.close()
-        requestsSendTimes.clear()
+        requestsJob.cancel()
+        timeManager.close()
+        quotaManager.close()
     }
 }

src/main/kotlin/com/github/insanusmokrassar/SauceNaoAPI/models/SauceNaoAnswer.kt

@@ -1,9 +1,40 @@
 package com.github.insanusmokrassar.SauceNaoAPI.models
 
-import kotlinx.serialization.Serializable
+import kotlinx.serialization.*
+import kotlinx.serialization.internal.ArrayListSerializer
+import kotlinx.serialization.json.*
 
-@Serializable
+@Serializable(SauceNaoAnswerSerializer::class)
 data class SauceNaoAnswer(
     val header: Header,
-    val results: List<Result> = emptyList()
+    val results: List<Result> = emptyList(),
+    val raw: JsonObject
 )
+
+@Serializer(SauceNaoAnswer::class)
+object SauceNaoAnswerSerializer : KSerializer<SauceNaoAnswer> {
+    private val resultsSerializer = ArrayListSerializer(Result.serializer())
+    private const val headerField = "header"
+    private const val resultsField = "results"
+    private val serializer = Json.nonstrict
+
+    override fun deserialize(decoder: Decoder): SauceNaoAnswer {
+        val raw = JsonObjectSerializer.deserialize(decoder)
+        val header = serializer.fromJson(Header.serializer(), raw.getObject(headerField))
+        val results = serializer.fromJson(resultsSerializer, raw.getArray(resultsField))
+
+        return SauceNaoAnswer(header, results, raw)
+    }
+
+    override fun serialize(encoder: Encoder, obj: SauceNaoAnswer) {
+        val resultObject = JsonObject(
+            obj.raw.content.let {
+                it + mapOf(
+                    headerField to serializer.toJson(Header.serializer(), obj.header),
+                    resultsField to serializer.toJson(resultsSerializer, obj.results)
+                )
+            }
+        )
+        JsonObject.serializer().serialize(encoder, resultObject)
+    }
+}

src/main/kotlin/com/github/insanusmokrassar/SauceNaoAPI/utils/RequestQuotaManager.kt

@@ -0,0 +1,74 @@
+package com.github.insanusmokrassar.SauceNaoAPI.utils
+
+import com.github.insanusmokrassar.SauceNaoAPI.additional.LONG_TIME_RECALCULATING_MILLIS
+import com.github.insanusmokrassar.SauceNaoAPI.additional.SHORT_TIME_RECALCULATING_MILLIS
+import com.github.insanusmokrassar.SauceNaoAPI.models.Header
+import kotlinx.coroutines.*
+import kotlinx.coroutines.channels.Channel
+import kotlinx.io.core.Closeable
+import org.joda.time.DateTime
+import kotlin.coroutines.suspendCoroutine
+import kotlin.math.min
+
+class RequestQuotaManager (
+    private val scope: CoroutineScope
+) : Closeable {
+    private var longQuota = 1
+    private var shortQuota = 1
+    private var longMaxQuota = 1
+    private var shortMaxQuota = 1
+
+    private val quotaActions = Channel<suspend () -> Unit>(Channel.UNLIMITED)
+
+    private val quotaJob = scope.launch {
+        for (callback in quotaActions) {
+            callback()
+        }
+    }
+
+    suspend fun updateQuota(header: Header, timeManager: TimeManager) {
+        quotaActions.send(
+            suspend {
+                longMaxQuota = header.longLimit
+                shortMaxQuota = header.shortLimit
+
+                longQuota = min(header.longLimit, header.longRemaining)
+                shortQuota = min(header.shortLimit, header.shortRemaining)
+
+                when {
+                    shortQuota < 1 -> timeManager.getMostOldestInShortPeriod() ?.millis ?.plus(SHORT_TIME_RECALCULATING_MILLIS) ?: let {
+                        shortQuota = 1
+                        null
+                    }
+                    longQuota < 1 -> timeManager.getMostOldestInLongPeriod() ?.millis ?.plus(LONG_TIME_RECALCULATING_MILLIS) ?: let {
+                        longQuota = 1
+                        null
+                    }
+                    else -> null
+                } ?.let {
+                    delay(it - DateTime.now().millis)
+                }
+                Unit
+            }
+        )
+    }
+
+    suspend fun getQuota() {
+        return suspendCoroutine {
+            lateinit var callback: suspend () -> Unit
+            callback = suspend {
+                if (longQuota > 0 && shortQuota > 0) {
+                    it.resumeWith(Result.success(Unit))
+                } else {
+                    quotaActions.send(callback)
+                }
+            }
+            quotaActions.offer(callback)
+        }
+    }
+
+    override fun close() {
+        quotaJob.cancel()
+        quotaActions.close()
+    }
+}

src/main/kotlin/com/github/insanusmokrassar/SauceNaoAPI/utils/SleepCalculations.kt

@@ -0,0 +1,18 @@
+package com.github.insanusmokrassar.SauceNaoAPI.utils
+
+import com.github.insanusmokrassar.SauceNaoAPI.additional.LONG_TIME_RECALCULATING_MILLIS
+import com.github.insanusmokrassar.SauceNaoAPI.additional.SHORT_TIME_RECALCULATING_MILLIS
+import com.github.insanusmokrassar.SauceNaoAPI.models.Header
+import org.joda.time.DateTime
+
+internal suspend fun calculateSleepTime(
+    header: Header,
+    mostOldestInShortPeriodGetter: suspend () -> DateTime?,
+    mostOldestInLongPeriodGetter: suspend () -> DateTime?
+): DateTime? {
+    return when {
+        header.longRemaining < 1 -> mostOldestInLongPeriodGetter() ?.plusMillis(LONG_TIME_RECALCULATING_MILLIS)
+        header.shortRemaining < 1 -> mostOldestInShortPeriodGetter() ?.plusMillis(SHORT_TIME_RECALCULATING_MILLIS)
+        else -> null
+    }
+}

src/main/kotlin/com/github/insanusmokrassar/SauceNaoAPI/utils/TimeManager.kt

@@ -0,0 +1,104 @@
+package com.github.insanusmokrassar.SauceNaoAPI.utils
+
+import com.github.insanusmokrassar.SauceNaoAPI.additional.LONG_TIME_RECALCULATING_MILLIS
+import com.github.insanusmokrassar.SauceNaoAPI.additional.SHORT_TIME_RECALCULATING_MILLIS
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.launch
+import kotlinx.io.core.Closeable
+import org.joda.time.DateTime
+import kotlin.coroutines.Continuation
+import kotlin.coroutines.suspendCoroutine
+
+private fun MutableList<DateTime>.clearTooOldTimes(relatedTo: DateTime = DateTime.now()) {
+    val limitValue = relatedTo.minusMillis(LONG_TIME_RECALCULATING_MILLIS)
+
+    removeAll {
+        it < limitValue
+    }
+}
+
+private interface TimeManagerAction {
+    suspend fun makeChangeWith(times: MutableList<DateTime>)
+    suspend operator fun invoke(times: MutableList<DateTime>) = makeChangeWith(times)
+}
+
+private data class TimeManagerClean(private val relatedTo: DateTime = DateTime.now()) : TimeManagerAction {
+    override suspend fun makeChangeWith(times: MutableList<DateTime>) {
+        times.clearTooOldTimes(relatedTo)
+    }
+}
+
+private data class TimeManagerTimeAdder(
+    private val time: DateTime = DateTime.now()
+) : TimeManagerAction {
+    override suspend fun makeChangeWith(times: MutableList<DateTime>) {
+        times.add(time)
+        times.clearTooOldTimes()
+    }
+}
+
+private data class TimeManagerMostOldestInLongGetter(
+    private val continuation: Continuation<DateTime?>
+) : TimeManagerAction {
+    override suspend fun makeChangeWith(times: MutableList<DateTime>) {
+        times.clearTooOldTimes()
+        continuation.resumeWith(Result.success(times.min()))
+    }
+}
+
+private data class TimeManagerMostOldestInShortGetter(
+    private val continuation: Continuation<DateTime?>
+) : TimeManagerAction {
+    override suspend fun makeChangeWith(times: MutableList<DateTime>) {
+        times.clearTooOldTimes()
+
+        val now = DateTime.now()
+
+        val limitTime = now.minusMillis(SHORT_TIME_RECALCULATING_MILLIS)
+
+        continuation.resumeWith(
+            Result.success(
+                times.asSequence().filter {
+                    limitTime < it
+                }.min()
+            )
+        )
+    }
+}
+
+class TimeManager(
+    scope: CoroutineScope
+) : Closeable {
+    private val actionsChannel = Channel<TimeManagerAction>(Channel.UNLIMITED)
+
+    private val timeUpdateJob = scope.launch {
+        val times = mutableListOf<DateTime>()
+        for (action in actionsChannel) {
+            action(times)
+        }
+    }
+
+    suspend fun addTimeAndClear() {
+        actionsChannel.send(TimeManagerTimeAdder())
+    }
+
+    suspend fun getMostOldestInLongPeriod(): DateTime? {
+        return suspendCoroutine {
+            actionsChannel.offer(
+                TimeManagerMostOldestInLongGetter(it)
+            )
+        }
+    }
+
+    suspend fun getMostOldestInShortPeriod(): DateTime? {
+        return suspendCoroutine {
+            actionsChannel.offer(TimeManagerMostOldestInShortGetter(it))
+        }
+    }
+
+    override fun close() {
+        actionsChannel.close()
+        timeUpdateJob.cancel()
+    }
+}