Added Batteries (#300)

* Batteries are implemented. Small problem with the deletion when running larger workloads.

Added mock files for the Battery implementation. Updated the Carbon Model to allow for multiple receivers of CarbonIntensity

* Implemented batteries in OpenDC.

* Spotless applied

opendc-compute/opendc-compute-simulator/src/main/kotlin/org/opendc/compute/simulator/internal/Guest.kt

@@ -96,6 +96,7 @@ public class Guest(
 
         val scalingPolicy = NoDelayScaling()
 
+        // TODO: This is not being used at the moment
         val bootworkload =
             TraceWorkload(
                 ArrayList(

opendc-compute/opendc-compute-simulator/src/main/kotlin/org/opendc/compute/simulator/provisioner/HostsProvisioningStep.kt

@@ -27,7 +27,11 @@ import org.opendc.compute.simulator.host.SimHost
 import org.opendc.compute.simulator.service.ComputeService
 import org.opendc.compute.topology.specs.ClusterSpec
 import org.opendc.compute.topology.specs.HostSpec
+import org.opendc.simulator.compute.power.CarbonModel
 import org.opendc.simulator.compute.power.SimPowerSource
+import org.opendc.simulator.compute.power.batteries.BatteryAggregator
+import org.opendc.simulator.compute.power.batteries.SimBattery
+import org.opendc.simulator.compute.power.batteries.policy.SingleThresholdBatteryPolicy
 import org.opendc.simulator.engine.engine.FlowEngine
 import org.opendc.simulator.engine.graph.FlowDistributor
 
@@ -57,15 +61,50 @@ public class HostsProvisioningStep internal constructor(
         for (cluster in clusterSpecs) {
             // Create the Power Source to which hosts are connected
 
+            // Create Power Source
+            val simPowerSource = SimPowerSource(graph, cluster.powerSource.totalPower.toDouble())
+            simPowerSources.add(simPowerSource)
+            service.addPowerSource(simPowerSource)
+
+            val hostDistributor = FlowDistributor(graph)
+
             val carbonFragments = getCarbonFragments(cluster.powerSource.carbonTracePath)
 
-            val simPowerSource = SimPowerSource(graph, cluster.powerSource.totalPower.toDouble(), carbonFragments, startTime)
+            var carbonModel: CarbonModel? = null
+            // Create Carbon Model
+            if (carbonFragments != null) {
+                carbonModel = CarbonModel(graph, carbonFragments, startTime)
+                carbonModel.addReceiver(simPowerSource)
+            }
 
-            service.addPowerSource(simPowerSource)
-            simPowerSources.add(simPowerSource)
+            if (cluster.battery != null) {
+                // Create Battery Distributor
+                val batteryDistributor = FlowDistributor(graph)
+                graph.addEdge(batteryDistributor, simPowerSource)
 
-            val powerDistributor = FlowDistributor(graph)
-            graph.addEdge(powerDistributor, simPowerSource)
+                // Create Battery
+                val battery =
+                    SimBattery(graph, cluster.battery!!.capacity, cluster.battery!!.chargingSpeed, cluster.battery!!.initialCharge)
+                graph.addEdge(battery, batteryDistributor)
+
+                // Create Aggregator
+                val batteryAggregator = BatteryAggregator(graph, battery, batteryDistributor)
+
+                // Create BatteryPolicy
+                val batteryPolicy =
+                    SingleThresholdBatteryPolicy(
+                        graph,
+                        battery,
+                        batteryAggregator,
+                        cluster.battery!!.batteryPolicy.carbonThreshold,
+                    )
+
+                carbonModel?.addReceiver(batteryPolicy)
+
+                graph.addEdge(hostDistributor, batteryAggregator)
+            } else {
+                graph.addEdge(hostDistributor, simPowerSource)
+            }
 
             // Create hosts, they are connected to the powerMux when SimMachine is created
             for (hostSpec in cluster.hostSpecs) {
@@ -78,7 +117,7 @@ public class HostsProvisioningStep internal constructor(
                         graph,
                         hostSpec.model,
                         hostSpec.cpuPowerModel,
-                        powerDistributor,
+                        hostDistributor,
                     )
 
                 require(simHosts.add(simHost)) { "Host with uid ${hostSpec.uid} already exists" }
@@ -92,7 +131,6 @@ public class HostsProvisioningStep internal constructor(
             }
 
             for (simPowerSource in simPowerSources) {
-                // TODO: add close function
                 simPowerSource.close()
             }
         }

opendc-compute/opendc-compute-topology/src/main/kotlin/org/opendc/compute/topology/TopologyFactories.kt

@@ -24,6 +24,7 @@
 
 package org.opendc.compute.topology
 
+import org.opendc.compute.topology.specs.BatterySpec
 import org.opendc.compute.topology.specs.ClusterJSONSpec
 import org.opendc.compute.topology.specs.ClusterSpec
 import org.opendc.compute.topology.specs.HostJSONSpec
@@ -109,8 +110,21 @@ private fun ClusterJSONSpec.toClusterSpec(random: RandomGenerator): ClusterSpec
             totalPower = this.powerSource.totalPower,
             carbonTracePath = this.powerSource.carbonTracePath,
         )
+
+    var batterySpec: BatterySpec? = null
+    if (this.battery != null) {
+        batterySpec =
+            BatterySpec(
+                UUID(random.nextLong(), clusterId.toLong()),
+                this.battery.capacity,
+                this.battery.chargingSpeed,
+                this.battery.batteryPolicy,
+                this.battery.initialCharge,
+            )
+    }
+
     clusterId++
-    return ClusterSpec(this.name, hostSpecs, powerSourceSpec)
+    return ClusterSpec(this.name, hostSpecs, powerSourceSpec, batterySpec)
 }
 
 /**

opendc-compute/opendc-compute-topology/src/main/kotlin/org/opendc/compute/topology/specs/BatterySpec.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2025 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.topology.specs
+
+import java.util.UUID
+
+public data class BatterySpec(
+    val uid: UUID,
+    val capacity: Double,
+    val chargingSpeed: Double,
+    val batteryPolicy: BatteryPolicyJSONSpec,
+    val initialCharge: Double,
+)

opendc-compute/opendc-compute-topology/src/main/kotlin/org/opendc/compute/topology/specs/ClusterSpec.kt

@@ -26,4 +26,5 @@ public data class ClusterSpec(
     val name: String,
     val hostSpecs: List<HostSpec>,
     val powerSource: PowerSourceSpec,
+    val battery: BatterySpec? = null,
 )

opendc-compute/opendc-compute-topology/src/main/kotlin/org/opendc/compute/topology/specs/TopologySpecs.kt

@@ -51,6 +51,7 @@ public data class ClusterJSONSpec(
     val count: Int = 1,
     val hosts: List<HostJSONSpec>,
     val powerSource: PowerSourceJSONSpec = PowerSourceJSONSpec.DFLT,
+    val battery: BatteryJSONSpec? = null,
     val location: String = "NL",
 )
 
@@ -155,3 +156,29 @@ public data class PowerSourceJSONSpec(
             )
     }
 }
+
+/**
+ * Definition of a power source used for JSON input.
+ *
+ * @property vendor
+ * @property modelName
+ * @property arch
+ * @property totalPower
+ */
+@Serializable
+public data class BatteryJSONSpec(
+    var capacity: Double,
+    val chargingSpeed: Double,
+    val batteryPolicy: BatteryPolicyJSONSpec,
+    var initialCharge: Double = 0.0,
+) {
+    init {
+        this.capacity *= 3600000
+        this.initialCharge *= 3600000
+    }
+}
+
+@Serializable
+public data class BatteryPolicyJSONSpec(
+    val carbonThreshold: Double,
+)