84 lines
2.6 KiB
Kotlin
84 lines
2.6 KiB
Kotlin
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2017 Mariotaku Lee <mariotaku.lee@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.mariotaku.twidere.util.sync
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import android.content.Context
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import android.support.annotation.UiThread
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import android.support.annotation.WorkerThread
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import android.support.v4.util.ArrayMap
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import org.mariotaku.twidere.annotation.ReadPositionTag
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import java.io.IOException
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import java.util.*
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/**
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* Created by mariotaku on 2017/4/13.
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*/
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abstract class TimelineSyncManager(val context: Context) {
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private val stagedCommits = ArrayMap<TimelineKey, Long>()
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private val cachedPositions = ArrayMap<TimelineKey, Long>()
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fun setPosition(@ReadPositionTag positionTag: String, currentTag: String?, positionKey: Long) {
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stagedCommits[TimelineKey(positionTag, currentTag)] = positionKey
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}
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fun commit() {
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val data = stagedCommits.map { (key, value) ->
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PositionData(key.positionTag, key.currentTag, value)
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}.toTypedArray()
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stagedCommits.clear()
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performSync(data)
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}
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@UiThread
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protected abstract fun performSync(data: Array<PositionData>)
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@WorkerThread
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@Throws(IOException::class)
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abstract fun blockingGetPosition(@ReadPositionTag positionTag: String, currentTag: String?): Long
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data class TimelineKey(val positionTag: String, val currentTag: String?)
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data class PositionData(val positionTag: String, val currentTag: String?, val positionKey: Long)
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abstract class Factory {
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protected var manager: TimelineSyncManager? = null
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fun get(): TimelineSyncManager? = manager
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fun setup(context: Context) {
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manager = create(context)
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}
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protected abstract fun create(context: Context): TimelineSyncManager?
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}
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object DummyFactory : Factory() {
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override fun create(context: Context) = null
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}
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companion object {
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fun newFactory(): Factory = ServiceLoader.load(Factory::class.java).firstOrNull() ?: DummyFactory
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}
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}
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