Plugin updating is executed asynchronously by Quartz Scheduler

src/main/scala/plugin/PluginSystem.scala

@@ -87,25 +87,6 @@ object PluginSystem {
   case class RepositoryMenu(label: String, name: String, url: String, icon: String, condition: Context => Boolean)
   case class Action(path: String, function: (HttpServletRequest, HttpServletResponse) => Any)
 
-  /**
-   * Clone or pull all plugin repositories
-   *
-   * TODO Support plugin repository access through the proxy server
-   */
-  def updateAllRepositories(): Unit = {
-    repositories.foreach { repository =>
-      val dir = getPluginCacheDir()
-      val repo = new java.io.File(dir, repository.id)
-      if(repo.exists){
-        // pull if the repository is already cloned
-        Git.open(repo).pull().call()
-      } else {
-        // clone if the repository is not exist
-        Git.cloneRepository().setURI(repository.url).setDirectory(repo).call()
-      }
-    }
-  }
-
   /**
    * Checks whether the plugin is updatable.
    */
@@ -126,8 +107,6 @@ object PluginSystem {
     }
   }
 
-
-
   // TODO This is a test
 //  addGlobalMenu("Google", "http://www.google.co.jp/", "data:image/png;base64,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")
 //    { context => context.loginAccount.isDefined }

src/main/scala/plugin/PluginUpdateJob.scala

@@ -0,0 +1,66 @@
+package plugin
+
+import util.Directory._
+import org.eclipse.jgit.api.Git
+import org.slf4j.LoggerFactory
+import org.quartz.{Scheduler, JobExecutionContext, Job}
+import org.quartz.JobBuilder._
+import org.quartz.TriggerBuilder._
+import org.quartz.SimpleScheduleBuilder._
+
+class PluginUpdateJob extends Job {
+
+  private val logger = LoggerFactory.getLogger(classOf[PluginUpdateJob])
+  private var failedCount = 0
+
+  /**
+   * Clone or pull all plugin repositories
+   *
+   * TODO Support plugin repository access through the proxy server
+   */
+  override def execute(context: JobExecutionContext): Unit = {
+    try {
+      if(failedCount > 3){
+        logger.error("Skip plugin information updating because failed count is over limit")
+      } else {
+        logger.info("Start plugin information updating")
+        PluginSystem.repositories.foreach { repository =>
+          logger.info(s"Updating ${repository.id}: ${repository.url}...")
+          val dir = getPluginCacheDir()
+          val repo = new java.io.File(dir, repository.id)
+          if(repo.exists){
+            // pull if the repository is already cloned
+            Git.open(repo).pull().call()
+          } else {
+            // clone if the repository is not exist
+            Git.cloneRepository().setURI(repository.url).setDirectory(repo).call()
+          }
+        }
+        logger.info("End plugin information updating")
+      }
+    } catch {
+      case e: Exception => {
+        failedCount = failedCount + 1
+        logger.error("Failed to update plugin information", e)
+      }
+    }
+  }
+}
+
+object PluginUpdateJob {
+
+  def schedule(scheduler: Scheduler): Unit = {
+    val job = newJob(classOf[PluginUpdateJob])
+      .withIdentity("pluginUpdateJob")
+      .build()
+
+    val trigger = newTrigger()
+      .withIdentity("pluginUpdateTrigger")
+      .startNow()
+      .withSchedule(simpleSchedule().withIntervalInHours(24).repeatForever())
+      .build()
+
+    scheduler.scheduleJob(job, trigger)
+  }
+
+}