feat(web/runner): Avoid REST layer if possible

This change updates the Quarkus extension for the OpenDC runner to avoid
the REST layer if possible, by providing an implementation of `JobManager`
that directly communicates with the `JobService`. This means the runner
does not have to traverse the authentication layer.

1 files changed, 67 insertions, 0 deletions

diff --git a/opendc-web/opendc-web-server/src/main/kotlin/org/opendc/web/server/util/runner/QuarkusJobManager.kt b/opendc-web/opendc-web-server/src/main/kotlin/org/opendc/web/server/util/runner/QuarkusJobManager.kt
new file mode 100644
index 00000000..4704c5ae
--- /dev/null
+++ b/opendc-web/opendc-web-server/src/main/kotlin/org/opendc/web/server/util/runner/QuarkusJobManager.kt
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2022 AtLarge Research
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package org.opendc.web.server.util.runner
+
+import org.opendc.web.proto.JobState
+import org.opendc.web.proto.runner.Job
+import org.opendc.web.runner.JobManager
+import org.opendc.web.server.service.JobService
+import javax.enterprise.context.ApplicationScoped
+import javax.inject.Inject
+import javax.transaction.Transactional
+
+/**
+ * Implementation of [JobManager] that interfaces directly with [JobService] without overhead of the REST API.
+ */
+@ApplicationScoped
+class QuarkusJobManager @Inject constructor(private val service: JobService) : JobManager {
+    @Transactional
+    override fun findNext(): Job? {
+        return service.queryPending().firstOrNull()
+    }
+
+    @Transactional
+    override fun claim(id: Long): Boolean {
+        return try {
+            service.updateState(id, JobState.CLAIMED, null)
+            true
+        } catch (e: IllegalStateException) {
+            false
+        }
+    }
+
+    @Transactional
+    override fun heartbeat(id: Long) {
+        service.updateState(id, JobState.RUNNING, null)
+    }
+
+    @Transactional
+    override fun fail(id: Long) {
+        service.updateState(id, JobState.FAILED, null)
+    }
+
+    @Transactional
+    override fun finish(id: Long, results: Map<String, Any>) {
+        service.updateState(id, JobState.FINISHED, results)
+    }
+}