/**
* Sone - WebOfTrustPinger.kt - Copyright © 2019–2020 David ‘Bombe’ Roden
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
package net.pterodactylus.sone.freenet.wot
import com.google.common.eventbus.*
import net.pterodactylus.sone.core.event.*
import net.pterodactylus.sone.freenet.plugin.*
import net.pterodactylus.sone.utils.*
import java.util.concurrent.atomic.*
import java.util.function.*
import javax.inject.*
/**
* [Runnable] that is scheduled via an [Executor][java.util.concurrent.Executor],
* checks whether the web of trust plugin can be communicated with, sends
* events if its status changes and reschedules itself.
*/
class WebOfTrustPinger @Inject constructor(
private val eventBus: EventBus,
@Named("webOfTrustReacher") private val webOfTrustReacher: Runnable,
@Named("webOfTrustReschedule") private val reschedule: Consumer) : Runnable {
private val lastState = AtomicBoolean(false)
override fun run() {
try {
webOfTrustReacher()
if (!lastState.get()) {
eventBus.post(WebOfTrustAppeared())
lastState.set(true)
}
} catch (e: PluginException) {
if (lastState.get()) {
eventBus.post(WebOfTrustDisappeared())
lastState.set(false)
}
}
reschedule(this)
}
}