build: Add support for Java 16

This pull request adds support for building OpenDC using Java 16. 

To make this possible, we have upgraded the following dependencies:
- Kotlin from 1.4.3 to 1.5.0
- Jacoco from 0.8.6 to 0.8.7
- Gradle from 7.0 to 7.0.2

4 files changed, 6 insertions, 3 deletions

diff --git a/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/telemetry/parquet/ParquetEventWriter.kt b/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/telemetry/parquet/ParquetEventWriter.kt
index 38930ee5..4fa6ae66 100644
--- a/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/telemetry/parquet/ParquetEventWriter.kt
+++ b/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/telemetry/parquet/ParquetEventWriter.kt
@@ -52,6 +52,7 @@ public open class ParquetEventWriter<in T : Event>(
     /**
      * The writer to write the Parquet file.
      */
+    @Suppress("DEPRECATION")
     private val writer = AvroParquetWriter.builder<GenericData.Record>(Path(path.absolutePath))
         .withSchema(schema)
         .withCompressionCodec(CompressionCodecName.SNAPPY)
diff --git a/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/Sc20RawParquetTraceReader.kt b/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/Sc20RawParquetTraceReader.kt
index ffbf46d4..bd27cf02 100644
--- a/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/Sc20RawParquetTraceReader.kt
+++ b/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/Sc20RawParquetTraceReader.kt
@@ -105,7 +105,7 @@ public class Sc20RawParquetTraceReader(private val path: File) {
                 val uid = UUID.nameUUIDFromBytes("$id-${counter++}".toByteArray())
 
                 val vmFragments = fragments.getValue(id).asSequence()
-                val totalLoad = vmFragments.sumByDouble { it.usage } * 5 * 60 // avg MHz * duration = MFLOPs
+                val totalLoad = vmFragments.sumOf { it.usage } * 5 * 60 // avg MHz * duration = MFLOPs
                 val workload = SimTraceWorkload(vmFragments)
                 entries.add(
                     TraceEntry(
diff --git a/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/Sc20TraceConverter.kt b/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/Sc20TraceConverter.kt
index 7713c06f..1f9e289c 100644
--- a/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/Sc20TraceConverter.kt
+++ b/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/Sc20TraceConverter.kt
@@ -109,6 +109,7 @@ public class TraceConverterCli : CliktCommand(name = "trace-converter") {
             traceParquet.delete()
         }
 
+        @Suppress("DEPRECATION")
         val metaWriter = AvroParquetWriter.builder<GenericData.Record>(Path(metaParquet.toURI()))
             .withSchema(metaSchema)
             .withCompressionCodec(CompressionCodecName.SNAPPY)
@@ -116,6 +117,7 @@ public class TraceConverterCli : CliktCommand(name = "trace-converter") {
             .withRowGroupSize(16 * 1024 * 1024) // For write buffering (Page size)
             .build()
 
+        @Suppress("DEPRECATION")
         val writer = AvroParquetWriter.builder<GenericData.Record>(Path(traceParquet.toURI()))
             .withSchema(schema)
             .withCompressionCodec(CompressionCodecName.SNAPPY)
diff --git a/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/WorkloadSampler.kt b/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/WorkloadSampler.kt
index 5c8727ea..6de3f265 100644
--- a/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/WorkloadSampler.kt
+++ b/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/WorkloadSampler.kt
@@ -69,7 +69,7 @@ public fun sampleRegularWorkload(
     val totalLoad = if (workload is CompositeWorkload) {
         workload.totalLoad
     } else {
-        shuffled.sumByDouble { it.meta.getValue("total-load") as Double }
+        shuffled.sumOf { it.meta.getValue("total-load") as Double }
     }
     var currentLoad = 0.0
 
@@ -129,7 +129,7 @@ public fun sampleHpcWorkload(
     val totalLoad = if (workload is CompositeWorkload) {
         workload.totalLoad
     } else {
-        trace.sumByDouble { it.meta.getValue("total-load") as Double }
+        trace.sumOf { it.meta.getValue("total-load") as Double }
     }
 
     logger.debug { "Total trace load: $totalLoad" }