refactor(trace): Support GZIP files in Azure trace

This change updates the Azure VM trace format implementation to directly
support loading a trace in GZIP format in order to prevent users having
to decompress the trace files so they can be opened by OpenDC.

5 files changed, 11 insertions, 116 deletions

diff --git a/opendc-trace/opendc-trace-azure/src/main/kotlin/org/opendc/trace/azure/AzureTraceFormat.kt b/opendc-trace/opendc-trace-azure/src/main/kotlin/org/opendc/trace/azure/AzureTraceFormat.kt
index 253c7057..c9982877 100644
--- a/opendc-trace/opendc-trace-azure/src/main/kotlin/org/opendc/trace/azure/AzureTraceFormat.kt
+++ b/opendc-trace/opendc-trace-azure/src/main/kotlin/org/opendc/trace/azure/AzureTraceFormat.kt
@@ -31,8 +31,9 @@ import org.opendc.trace.util.CompositeTableReader
 import java.nio.file.Files
 import java.nio.file.Path
 import java.util.stream.Collectors
-import kotlin.io.path.extension
-import kotlin.io.path.nameWithoutExtension
+import java.util.zip.GZIPInputStream
+import kotlin.io.path.inputStream
+import kotlin.io.path.name
 
 /**
  * A format implementation for the Azure v1 format.
@@ -81,7 +82,10 @@ public class AzureTraceFormat : TraceFormat {
 
     override fun newReader(path: Path, table: String): TableReader {
         return when (table) {
-            TABLE_RESOURCES -> AzureResourceTableReader(factory.createParser(path.resolve("vmtable/vmtable.csv").toFile()))
+            TABLE_RESOURCES -> {
+                val stream = GZIPInputStream(path.resolve("vmtable/vmtable.csv.gz").inputStream())
+                AzureResourceTableReader(factory.createParser(stream))
+            }
             TABLE_RESOURCE_STATES -> newResourceStateReader(path)
             else -> throw IllegalArgumentException("Table $table not supported")
         }
@@ -96,8 +100,8 @@ public class AzureTraceFormat : TraceFormat {
      */
     private fun newResourceStateReader(path: Path): TableReader {
         val partitions = Files.walk(path.resolve("vm_cpu_readings"), 1)
-            .filter { !Files.isDirectory(it) && it.extension == "csv" }
-            .collect(Collectors.toMap({ it.nameWithoutExtension }, { it }))
+            .filter { !Files.isDirectory(it) && it.name.endsWith(".csv.gz") }
+            .collect(Collectors.toMap({ it.name.removeSuffix(".csv.gz") }, { it }))
             .toSortedMap()
         val it = partitions.iterator()
 
@@ -105,7 +109,8 @@ public class AzureTraceFormat : TraceFormat {
             override fun nextReader(): TableReader? {
                 return if (it.hasNext()) {
                     val (_, partPath) = it.next()
-                    return AzureResourceStateTableReader(factory.createParser(partPath.toFile()))
+                    val stream = GZIPInputStream(partPath.inputStream())
+                    return AzureResourceStateTableReader(factory.createParser(stream))
                 } else {
                     null
                 }
diff --git a/opendc-trace/opendc-trace-azure/src/test/resources/trace/vm_cpu_readings/vm_cpu_readings-file-1-of-125.csv b/opendc-trace/opendc-trace-azure/src/test/resources/trace/vm_cpu_readings/vm_cpu_readings-file-1-of-125.csv
deleted file mode 100644
index db6ddf8a..00000000
--- a/opendc-trace/opendc-trace-azure/src/test/resources/trace/vm_cpu_readings/vm_cpu_readings-file-1-of-125.csv
+++ /dev/null
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diff --git a/opendc-trace/opendc-trace-azure/src/test/resources/trace/vm_cpu_readings/vm_cpu_readings-file-1-of-125.csv.gz b/opendc-trace/opendc-trace-azure/src/test/resources/trace/vm_cpu_readings/vm_cpu_readings-file-1-of-125.csv.gz
new file mode 100644
index 00000000..592c7316
--- /dev/null
+++ b/opendc-trace/opendc-trace-azure/src/test/resources/trace/vm_cpu_readings/vm_cpu_readings-file-1-of-125.csv.gz
diff --git a/opendc-trace/opendc-trace-azure/src/test/resources/trace/vmtable/vmtable.csv b/opendc-trace/opendc-trace-azure/src/test/resources/trace/vmtable/vmtable.csv
deleted file mode 100644
index 299c518c..00000000
--- a/opendc-trace/opendc-trace-azure/src/test/resources/trace/vmtable/vmtable.csv
+++ /dev/null
@@ -1,10 +0,0 @@
-x/XsOfHO4ocsV99i4NluqKDuxctW2MMVmwqOPAlg4wp8mqbBOe3wxBlQo0+Qx+uf,VDU4C8cqdr+ORcqquwMRcsBA2l0SC6lCPys0wdghKROuxPYysA2XYii9Y5ZkaYaq,Pc2VLB8aDxK2DCC96itq4vW/zVDp4wioAUiB3HoGSFYQ0o6/ZCegTpb9vEH4LeMTEWVObHTPRYEY81TYivZCMQ==,0,2591700,99.369869,3.4240942342446719,10.194309,Delay-insensitive,1,1.75

-H5CxmMoVcZSpjgGbohnVA3R+7uCTe/hM2ht2uIYi3t7KwXB4tkBxmZHBrt2A4x+n,BSXOcywx8pUU0DueDo6UMol1YzR6tn47KLEKaoXp0a1bf2PpzJ7n7lLlmhQ0OJf9,3J17LcV4gXjFat62qhVFRfoiWArHnY763HVqqI6orJCfV8h5j9yeotRMnCLlX1ooGkMyQ2MDOuY1oz111AGN9Q==,0,1539300,100,6.18178366757598,33.98136,Interactive,1,0.75

-wR/G1YUjpMP4zUbxGM/XJNhYS8cAK3SGKM2tqhF7VdeTUYHGktQiKQNoDTtYvnAc,VDU4C8cqdr+ORcqquwMRcsBA2l0SC6lCPys0wdghKROuxPYysA2XYii9Y5ZkaYaq,Pc2VLB8aDxK2DCC96itq4vW/zVDp4wioAUiB3HoGSFYQ0o6/ZCegTpb9vEH4LeMT+hzuAPZnYJMu61JNhTDF/Q==,2188800,2591700,99.569027,3.5736346071428589,7.92425,Delay-insensitive,1,1.75

-1XiU+KpvIa3T1XP8kk3ZY71Of03+ogFL5Pag9Mc2jBuh0YqeW0Zcb9lepKLdPEDg,8u+M3WcFp8pq183WoMB79PhK7xUzbaviOBv0qWN6Xn4mbuNVM1GYJlIjswgit+k1,DHbeI+pYTYFjH8JAF8SewM0z/4SqQctvxcBRGIRglBmeLW5VjISVEw7/IpY345kHwHtk7+SKlEwc1upnT3PigA==,0,2591700,99.405085,16.2876105408034,95.69789,Delay-insensitive,8,56

-z5i2HiSaz6ZdLR6PXdnDjGva3jIlkMPXx23VtfXx9q3dXFRBQrxCOj7sHUsrmFLa,VDU4C8cqdr+ORcqquwMRcsBA2l0SC6lCPys0wdghKROuxPYysA2XYii9Y5ZkaYaq,Pc2VLB8aDxK2DCC96itq4vW/zVDp4wioAUiB3HoGSFYQ0o6/ZCegTpb9vEH4LeMTEWVObHTPRYEY81TYivZCMQ==,0,2188500,98.967961,3.036037969572376,9.445484,Delay-insensitive,1,1.75

-n77nP00/UpJmT+Yx1ZkDphvAqPoHU8yUpDCwyUtPNlRENqvNp6Inya1eiy7VP1+x,8u+M3WcFp8pq183WoMB79PhK7xUzbaviOBv0qWN6Xn4mbuNVM1GYJlIjswgit+k1,DHbeI+pYTYFjH8JAF8SewM0z/4SqQctvxcBRGIRglBmeLW5VjISVEw7/IpY345kHwHtk7+SKlEwc1upnT3PigA==,0,2591700,99.448473,34.17401179027781,98.553018,Delay-insensitive,8,56

-aTSXW3N1KepxKYwKumd7T1+f7DkGolSKV8EArYAdctjD26YqSMKezCVSdvmSgqIQ,dBub/K+8I6jD9t2ExqUdRNlVxPPvDWqICA9Sr+yzcBZ/nNuC0W2swapPoBNIRoF+,C9GnRqFF2lzW/elUsLEwhyAQj9D/d5JIOOgvwfPL1aINf+m1f29G7nXhr6mRPGbiofmjfP9GkepcWz9LX5tp7Q==,2290500,2292300,94.113335,32.461745857142866,94.113335,Unkown,1,1.75

-uSkGH3DS6BVo3RFnw3GZb6WCFSmGgvgKi4HIj08yxO4f5ladUQc3pqDOtqRN0W9+,8u+M3WcFp8pq183WoMB79PhK7xUzbaviOBv0qWN6Xn4mbuNVM1GYJlIjswgit+k1,DHbeI+pYTYFjH8JAF8SewM0z/4SqQctvxcBRGIRglBmeLW5VjISVEw7/IpY345kHwHtk7+SKlEwc1upnT3PigA==,0,2591700,99.276369,1.3500837561060346,23.450372,Delay-insensitive,8,56

-ztRY/Sk5mrSFFcpy2usZ0YZZ7Eumq130/5BB8WVXfWaYvFkU+EhXUQ2kOFkCXuCw,dBub/K+8I6jD9t2ExqUdRNlVxPPvDWqICA9Sr+yzcBZ/nNuC0W2swapPoBNIRoF+,C9GnRqFF2lzW/elUsLEwhyAQj9D/d5JIOOgvwfPL1aINf+m1f29G7nXhr6mRPGbiofmjfP9GkepcWz9LX5tp7Q==,2281200,2300100,98.671595,43.724999781249991,98.13707,Unkown,1,1.75

-bJoIb8ras2ZNNSdAz3CAu4HYRd6k9MOqij/+6/+/5XaYw4+EoGdUEr74DCi974gJ,8u+M3WcFp8pq183WoMB79PhK7xUzbaviOBv0qWN6Xn4mbuNVM1GYJlIjswgit+k1,DHbeI+pYTYFjH8JAF8SewM0z/4SqQctvxcBRGIRglBmeLW5VjISVEw7/IpY345kHwHtk7+SKlEwc1upnT3PigA==,0,2591700,99.498748,18.989459534151351,94.751666,Interactive,8,56

diff --git a/opendc-trace/opendc-trace-azure/src/test/resources/trace/vmtable/vmtable.csv.gz b/opendc-trace/opendc-trace-azure/src/test/resources/trace/vmtable/vmtable.csv.gz
new file mode 100644
index 00000000..0adc6b7e
--- /dev/null
+++ b/opendc-trace/opendc-trace-azure/src/test/resources/trace/vmtable/vmtable.csv.gz