format: Use LocalInputFile for Parquet reader

This change updates the format implementations that use Parquet by
switching to our InputFile implementation for local files, which
eliminates the need for Hadoop's filesystem support.

3 files changed, 53 insertions, 37 deletions

diff --git a/opendc-format/build.gradle.kts b/opendc-format/build.gradle.kts
index c0ffeb3e..d3c1a59a 100644
--- a/opendc-format/build.gradle.kts
+++ b/opendc-format/build.gradle.kts
@@ -39,8 +39,15 @@ dependencies {
         exclude(group = "org.jetbrains.kotlin", module = "kotlin-reflect")
     }
     implementation(kotlin("reflect"))
-    implementation(libs.parquet)
-    implementation(libs.hadoop.client) {
+
+    implementation(libs.parquet) {
+        exclude(group = "org.apache.hadoop")
+    }
+    implementation(libs.hadoop.common) {
+        exclude(group = "org.slf4j", module = "slf4j-log4j12")
+        exclude(group = "log4j")
+    }
+    implementation(libs.hadoop.mapreduce.client.core) {
         exclude(group = "org.slf4j", module = "slf4j-log4j12")
         exclude(group = "log4j")
     }
diff --git a/opendc-format/src/main/kotlin/org/opendc/format/trace/wtf/WtfTraceReader.kt b/opendc-format/src/main/kotlin/org/opendc/format/trace/wtf/WtfTraceReader.kt
index feadf61f..dde1b340 100644
--- a/opendc-format/src/main/kotlin/org/opendc/format/trace/wtf/WtfTraceReader.kt
+++ b/opendc-format/src/main/kotlin/org/opendc/format/trace/wtf/WtfTraceReader.kt
@@ -23,15 +23,16 @@
 package org.opendc.format.trace.wtf
 
 import org.apache.avro.generic.GenericRecord
-import org.apache.hadoop.fs.Path
-import org.apache.parquet.avro.AvroParquetReader
 import org.opendc.format.trace.TraceEntry
 import org.opendc.format.trace.TraceReader
+import org.opendc.format.util.LocalParquetReader
 import org.opendc.simulator.compute.workload.SimFlopsWorkload
 import org.opendc.workflow.api.Job
 import org.opendc.workflow.api.Task
 import org.opendc.workflow.api.WORKFLOW_TASK_CORES
 import org.opendc.workflow.api.WORKFLOW_TASK_DEADLINE
+import java.io.File
+import java.nio.file.Path
 import java.util.UUID
 import kotlin.math.min
 
@@ -41,13 +42,20 @@ import kotlin.math.min
  *
  * @param path The path to the trace.
  */
-public class WtfTraceReader(path: String) : TraceReader<Job> {
+public class WtfTraceReader(path: Path) : TraceReader<Job> {
     /**
      * The internal iterator to use for this reader.
      */
     private val iterator: Iterator<TraceEntry<Job>>
 
     /**
+     * Construct a [TraceReader] from the specified [path].
+     *
+     * @param path The path to the trace.
+     */
+    public constructor(path: File) : this(path.toPath())
+
+    /**
      * Initialize the reader.
      */
     init {
@@ -56,43 +64,43 @@ public class WtfTraceReader(path: String) : TraceReader<Job> {
         val tasks = mutableMapOf<Long, Task>()
         val taskDependencies = mutableMapOf<Task, List<Long>>()
 
-        @Suppress("DEPRECATION")
-        val reader = AvroParquetReader.builder<GenericRecord>(Path(path, "tasks/schema-1.0")).build()
+        LocalParquetReader<GenericRecord>(path.resolve("tasks/schema-1.0")).use { reader ->
+            while (true) {
+                val nextRecord = reader.read() ?: break
 
-        while (true) {
-            val nextRecord = reader.read() ?: break
+                val workflowId = nextRecord.get("workflow_id") as Long
+                val taskId = nextRecord.get("id") as Long
+                val submitTime = nextRecord.get("ts_submit") as Long
+                val runtime = nextRecord.get("runtime") as Long
+                val cores = (nextRecord.get("resource_amount_requested") as Double).toInt()
 
-            val workflowId = nextRecord.get("workflow_id") as Long
-            val taskId = nextRecord.get("id") as Long
-            val submitTime = nextRecord.get("ts_submit") as Long
-            val runtime = nextRecord.get("runtime") as Long
-            val cores = (nextRecord.get("resource_amount_requested") as Double).toInt()
-            @Suppress("UNCHECKED_CAST")
-            val dependencies = (nextRecord.get("parents") as ArrayList<GenericRecord>).map {
-                it.get("item") as Long
-            }
+                @Suppress("UNCHECKED_CAST")
+                val dependencies = (nextRecord.get("parents") as ArrayList<GenericRecord>).map {
+                    it.get("item") as Long
+                }
 
-            val flops: Long = 4100 * (runtime / 1000) * cores
+                val flops: Long = 4100 * (runtime / 1000) * cores
 
-            val workflow = workflows.getOrPut(workflowId) {
-                Job(UUID(0L, workflowId), "<unnamed>", HashSet())
-            }
-            val workload = SimFlopsWorkload(flops)
-            val task = Task(
-                UUID(0L, taskId),
-                "<unnamed>",
-                HashSet(),
-                mapOf(
-                    "workload" to workload,
-                    WORKFLOW_TASK_CORES to cores,
-                    WORKFLOW_TASK_DEADLINE to runtime
+                val workflow = workflows.getOrPut(workflowId) {
+                    Job(UUID(0L, workflowId), "<unnamed>", HashSet())
+                }
+                val workload = SimFlopsWorkload(flops)
+                val task = Task(
+                    UUID(0L, taskId),
+                    "<unnamed>",
+                    HashSet(),
+                    mapOf(
+                        "workload" to workload,
+                        WORKFLOW_TASK_CORES to cores,
+                        WORKFLOW_TASK_DEADLINE to runtime
+                    )
                 )
-            )
 
-            starts.merge(workflowId, submitTime, ::min)
-            (workflow.tasks as MutableSet<Task>).add(task)
-            tasks[taskId] = task
-            taskDependencies[task] = dependencies
+                starts.merge(workflowId, submitTime, ::min)
+                (workflow.tasks as MutableSet<Task>).add(task)
+                tasks[taskId] = task
+                taskDependencies[task] = dependencies
+            }
         }
 
         // Fix dependencies and dependents for all tasks
diff --git a/opendc-format/src/test/kotlin/org/opendc/format/trace/wtf/WtfTraceReaderTest.kt b/opendc-format/src/test/kotlin/org/opendc/format/trace/wtf/WtfTraceReaderTest.kt
index bcfa7553..31ae03e0 100644
--- a/opendc-format/src/test/kotlin/org/opendc/format/trace/wtf/WtfTraceReaderTest.kt
+++ b/opendc-format/src/test/kotlin/org/opendc/format/trace/wtf/WtfTraceReaderTest.kt
@@ -24,6 +24,7 @@ package org.opendc.format.trace.wtf
 
 import org.junit.jupiter.api.Assertions.*
 import org.junit.jupiter.api.Test
+import java.io.File
 
 /**
  * Test suite for the [WtfTraceReader] class.
@@ -34,7 +35,7 @@ class WtfTraceReaderTest {
      */
     @Test
     fun testParseWtf() {
-        val reader = WtfTraceReader("src/test/resources/wtf-trace")
+        val reader = WtfTraceReader(File("src/test/resources/wtf-trace"))
         var entry = reader.next()
         assertEquals(0, entry.start)
         assertEquals(23, entry.workload.tasks.size)