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[Sone.git] / src / main / kotlin / net / pterodactylus / sone / freenet / wot / IdentityManagerImpl.kt

diff --git a/src/main/kotlin/net/pterodactylus/sone/freenet/wot/IdentityManagerImpl.kt b/src/main/kotlin/net/pterodactylus/sone/freenet/wot/IdentityManagerImpl.kt
new file mode 100644 (file)
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+++ b/src/main/kotlin/net/pterodactylus/sone/freenet/wot/IdentityManagerImpl.kt
@@ -0,0 +1,91 @@
+/*
+ * Sone - IdentityManagerImpl.java - Copyright © 2010–2019 David 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 <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sone.freenet.wot
+
+import com.google.common.eventbus.*
+import com.google.inject.*
+import net.pterodactylus.util.service.*
+import java.util.concurrent.TimeUnit.*
+import java.util.logging.*
+import java.util.logging.Logger.*
+
+/**
+ * The identity manager takes care of loading and storing identities, their
+ * contexts, and properties. It does so in a way that does not expose errors via
+ * exceptions but it only logs them and tries to return sensible defaults.
+ *
+ *
+ * It is also responsible for polling identities from the Web of Trust plugin
+ * and sending events to the [EventBus] when [Identity]s and
+ * [OwnIdentity]s are discovered or disappearing.
+ */
+@Singleton
+class IdentityManagerImpl @Inject constructor(
+               private val eventBus: EventBus,
+               private val webOfTrustConnector: WebOfTrustConnector,
+               private val identityLoader: IdentityLoader
+) : AbstractService("Sone Identity Manager", false), IdentityManager {
+
+       private val currentOwnIdentities = mutableSetOf<OwnIdentity>()
+
+       override val isConnected: Boolean
+               get() = notThrowing { webOfTrustConnector.ping() }
+
+       override val allOwnIdentities: Set<OwnIdentity>
+               get() = synchronized(currentOwnIdentities) {
+                       currentOwnIdentities.toSet()
+               }
+
+       override fun serviceRun() {
+               var oldIdentities = mapOf<OwnIdentity, Collection<Identity>>()
+
+               while (!shouldStop()) {
+                       try {
+                               val currentIdentities = identityLoader.loadIdentities()
+
+                               val identityChangeEventSender = IdentityChangeEventSender(eventBus, oldIdentities)
+                               identityChangeEventSender.detectChanges(currentIdentities)
+
+                               oldIdentities = currentIdentities
+
+                               synchronized(currentOwnIdentities) {
+                                       currentOwnIdentities.clear()
+                                       currentOwnIdentities.addAll(currentIdentities.keys)
+                               }
+                       } catch (wote1: WebOfTrustException) {
+                               logger.log(Level.WARNING, "WoT has disappeared!", wote1)
+                       } catch (e: Exception) {
+                               logger.log(Level.SEVERE, "Uncaught exception in IdentityManager thread!", e)
+                       }
+
+                       /* wait a minute before checking again. */
+                       sleep(SECONDS.toMillis(60))
+               }
+       }
+
+}
+
+private val logger: Logger = getLogger(IdentityManagerImpl::class.java.name)
+
+private fun notThrowing(action: () -> Unit): Boolean =
+               try {
+                       action()
+                       true
+               } catch (e: Exception) {
+                       false
+               }