feat: migrated the SmarScheduler and the KafkaMonitor

2 files changed, 129 insertions, 0 deletions

diff --git a/opendc-compute/opendc-compute-simulator/src/main/kotlin/org/opendc/compute/simulator/scheduler/SmartScheduler.kt b/opendc-compute/opendc-compute-simulator/src/main/kotlin/org/opendc/compute/simulator/scheduler/SmartScheduler.kt
new file mode 100644
index 00000000..baadd806
--- /dev/null
+++ b/opendc-compute/opendc-compute-simulator/src/main/kotlin/org/opendc/compute/simulator/scheduler/SmartScheduler.kt
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2021 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.compute.simulator.scheduler
+
+import org.opendc.common.utils.HTTPClient
+import org.opendc.compute.simulator.service.HostView
+import org.opendc.compute.simulator.service.ServiceTask
+
+public class SmartScheduler : ComputeScheduler {
+    private val client = HTTPClient.getInstance()
+    // the point is that a smart scheduler listens for suggestions from the
+    // digital twin
+    // and here is where you change your actions based on the result from the DT
+    // predictive analytics is going to be much easier to do.
+    // you will completely overcome the overhead of having to tap-into
+    // the digital twin mid-through the simulation/in between two hosts being scheduled
+    // i.e., the normal simulation will NOT have to wait.
+    // predictive analytics will overcome the problem of the scheduling time overhead
+
+    override fun addHost(host: HostView) {
+        TODO("Not yet implemented")
+    }
+
+    override fun removeHost(host: HostView) {
+        TODO("Not yet implemented")
+    }
+
+    override fun updateHost(host: HostView) {
+        TODO("Not yet implemented")
+    }
+
+    override fun setHostEmpty(hostView: HostView) {
+        TODO("Not yet implemented")
+    }
+
+    override fun select(iter: MutableIterator<SchedulingRequest>): SchedulingResult {
+        TODO("Not yet implemented")
+        // Here be the API calls using HTTP between the other OpenDC
+        // You need to specify how much time do you have to make the prediction between receiving a time and putting onto a host
+        return SchedulingResult(SchedulingResultType.EMPTY)
+    }
+
+    // Benefits of a digital twin: during operations you make sure what is happening in the real world.
+    // The use-case is making split-second automated decisions before operators can make them.
+    // Make a strong case for making a Digital Twin.
+    override fun removeTask(
+        task: ServiceTask,
+        host: HostView?,
+    ) {
+        TODO("Not yet implemented")
+    }
+}
diff --git a/opendc-compute/opendc-compute-simulator/src/main/kotlin/org/opendc/compute/simulator/telemetry/KafkaComputeMonitor.kt b/opendc-compute/opendc-compute-simulator/src/main/kotlin/org/opendc/compute/simulator/telemetry/KafkaComputeMonitor.kt
new file mode 100644
index 00000000..c8368af2
--- /dev/null
+++ b/opendc-compute/opendc-compute-simulator/src/main/kotlin/org/opendc/compute/simulator/telemetry/KafkaComputeMonitor.kt
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2026 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.compute.simulator.telemetry
+
+import org.opendc.common.ProtobufMetrics
+import org.opendc.common.utils.Kafka
+import org.opendc.compute.simulator.telemetry.table.host.HostTableReader
+/**
+ * This class logs data from the simulator into a Kafka topic.
+ * The data uses the Protobuf format.
+ *
+ * @author Mateusz Kwiatkowski
+ *
+ * @see <a href=https://protobuf.dev/getting-started/javatutorial/>
+ *              https://protobuf.dev/getting-started/javatutorial/</a>
+ */
+public class KafkaComputeMonitor : ComputeMonitor {
+    private val send = Kafka("postgres_topic").getSend()
+
+    @Override
+    override fun record(reader: HostTableReader) {
+        try {
+            val packet =
+                ProtobufMetrics.ProtoExport.newBuilder()
+                    .setTimestamp(reader.timestamp.toEpochMilli().toString())
+                    .setHostId(reader.hostInfo.name)
+                    .setTasksactive(reader.tasksActive)
+                    .setCpuutilization(reader.cpuUtilization)
+                    .setEnergyusage(reader.energyUsage)
+                    .build()
+            this.send(packet)
+
+        } catch (e: Exception) {
+            println("${e.message}")
+        }
+    }
+}