67 lines
2.2 KiB
Kotlin
67 lines
2.2 KiB
Kotlin
/*
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* Copyright 2016 Christian Basler
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package ch.dissem.apps.abit.service
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import android.content.ComponentName
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import android.content.Context
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import android.content.Intent
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import android.content.ServiceConnection
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import android.os.IBinder
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import java.util.LinkedList
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import ch.dissem.apps.abit.service.ProofOfWorkService.PowBinder
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import ch.dissem.apps.abit.service.ProofOfWorkService.PowItem
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import ch.dissem.bitmessage.ports.ProofOfWorkEngine
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import android.content.Context.BIND_AUTO_CREATE
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/**
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* Proof of Work engine that uses the Proof of Work service.
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*/
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class ServicePowEngine(private val ctx: Context) : ProofOfWorkEngine {
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private val queue = LinkedList<PowItem>()
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private var service: PowBinder? = null
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private val connection = object : ServiceConnection {
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override fun onServiceConnected(name: ComponentName, service: IBinder) = synchronized(lock) {
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this@ServicePowEngine.service = service as PowBinder
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while (!queue.isEmpty()) {
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service.process(queue.poll())
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}
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}
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override fun onServiceDisconnected(name: ComponentName) {
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service = null
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}
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}
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override fun calculateNonce(initialHash: ByteArray, target: ByteArray, callback: ProofOfWorkEngine.Callback) {
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val item = PowItem(initialHash, target, callback)
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synchronized(lock) {
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service?.process(item) ?: {
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queue.add(item)
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ctx.bindService(Intent(ctx, ProofOfWorkService::class.java), connection, BIND_AUTO_CREATE)
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}.invoke()
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}
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}
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companion object {
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private val lock = Any()
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}
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}
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