refactor: Use InstantSource as time source

This change updates the modules of OpenDC to always accept
the `InstantSource` interface as source of time. Previously we used
`java.time.Clock`, but this class is bound to a time zone which does not
make sense for our use-cases.

Since `java.time.Clock` implements `java.time.InstantSource`, it can be
used in places that require an `InstantSource` as parameter. Conversion
from `InstantSource` to `Clock` is also possible by invoking
`InstantSource#withZone`.

2 files changed, 5 insertions, 5 deletions

diff --git a/opendc-simulator/opendc-simulator-compute/src/main/java/org/opendc/simulator/compute/SimPsuFactories.java b/opendc-simulator/opendc-simulator-compute/src/main/java/org/opendc/simulator/compute/SimPsuFactories.java
index 52d04052..05b40cf8 100644
--- a/opendc-simulator/opendc-simulator-compute/src/main/java/org/opendc/simulator/compute/SimPsuFactories.java
+++ b/opendc-simulator/opendc-simulator-compute/src/main/java/org/opendc/simulator/compute/SimPsuFactories.java
@@ -22,7 +22,7 @@
 
 package org.opendc.simulator.compute;
 
-import java.time.Clock;
+import java.time.InstantSource;
 import org.jetbrains.annotations.NotNull;
 import org.opendc.simulator.compute.model.ProcessingUnit;
 import org.opendc.simulator.compute.power.CpuPowerModel;
@@ -117,7 +117,7 @@ public class SimPsuFactories {
         private final FlowStage stage;
         private final OutPort out;
         private final CpuPowerModel model;
-        private final Clock clock;
+        private final InstantSource clock;
 
         private double targetFreq;
         private double totalUsage;
diff --git a/opendc-simulator/opendc-simulator-compute/src/main/java/org/opendc/simulator/compute/kernel/SimHypervisor.java b/opendc-simulator/opendc-simulator-compute/src/main/java/org/opendc/simulator/compute/kernel/SimHypervisor.java
index 4ebcba71..a1623351 100644
--- a/opendc-simulator/opendc-simulator-compute/src/main/java/org/opendc/simulator/compute/kernel/SimHypervisor.java
+++ b/opendc-simulator/opendc-simulator-compute/src/main/java/org/opendc/simulator/compute/kernel/SimHypervisor.java
@@ -22,7 +22,7 @@
 
 package org.opendc.simulator.compute.kernel;
 
-import java.time.Clock;
+import java.time.InstantSource;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -253,7 +253,7 @@ public final class SimHypervisor implements SimWorkload {
         private final FlowMultiplexer multiplexer;
         private final FlowStage stage;
         private final List<ScalingGovernor> scalingGovernors;
-        private final Clock clock;
+        private final InstantSource clock;
         private final HvCounters counters;
 
         private long lastCounterUpdate;
@@ -526,7 +526,7 @@ public final class SimHypervisor implements SimWorkload {
         private final VmInterferenceMember interferenceMember;
         private final FlowStage stage;
         private final FlowMultiplexer multiplexer;
-        private final Clock clock;
+        private final InstantSource clock;
 
         private final List<VCpu> cpus;
         private final SimAbstractMachine.Memory memory;