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`.

1 files changed, 3 insertions, 3 deletions

diff --git a/opendc-experiments/opendc-experiments-faas/src/main/kotlin/org/opendc/experiments/faas/TraceHelpers.kt b/opendc-experiments/opendc-experiments-faas/src/main/kotlin/org/opendc/experiments/faas/TraceHelpers.kt
index c4001e2e..7a354d69 100644
--- a/opendc-experiments/opendc-experiments-faas/src/main/kotlin/org/opendc/experiments/faas/TraceHelpers.kt
+++ b/opendc-experiments/opendc-experiments-faas/src/main/kotlin/org/opendc/experiments/faas/TraceHelpers.kt
@@ -28,16 +28,16 @@ import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 import org.opendc.faas.service.FaaSService
-import java.time.Clock
+import java.time.InstantSource
 import kotlin.math.max
 
 /**
  * Run a simulation of the [FaaSService] by replaying the workload trace given by [trace].
  *
- * @param clock A [Clock] instance tracking simulation time.
+ * @param clock An [InstantSource] instance tracking simulation time.
  * @param trace The trace to simulate.
  */
-public suspend fun FaaSService.replay(clock: Clock, trace: List<FunctionTrace>) {
+public suspend fun FaaSService.replay(clock: InstantSource, trace: List<FunctionTrace>) {
     val client = newClient()
     try {
         coroutineScope {