merge: Add generic trace reading library

This pull request adds a generic trace reading library to OpenDC. 
The library has been designed to support a wide range of trace formats 
and uses a streaming approach to improve performance of reading large traces.

* Add trace reading API
* Implement API for GWF format
* Implement API for SWF format
* Implement API for WTF format
* Implement API for Bitbrains format
* Implement API for Bitbrains Parquet format

**Breaking API Changes**

* `opendc-format` has been removed in favour of `opendc-trace-*`

1 files changed, 98 insertions, 0 deletions

diff --git a/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/TaskColumns.kt b/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/TaskColumns.kt
new file mode 100644
index 00000000..88bbc623
--- /dev/null
+++ b/opendc-trace/opendc-trace-api/src/main/kotlin/org/opendc/trace/TaskColumns.kt
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2021 AtLarge Research
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+@file:JvmName("TaskColumns")
+package org.opendc.trace
+
+/**
+ * A column containing the task identifier.
+ */
+@JvmField
+public val TASK_ID: TableColumn<Long> = longColumn("task:id")
+
+/**
+ * A column containing the identifier of the workflow.
+ */
+@JvmField
+public val TASK_WORKFLOW_ID: TableColumn<Long> = longColumn("task:workflow_id")
+
+/**
+ * A column containing the submit time of the task.
+ */
+@JvmField
+public val TASK_SUBMIT_TIME: TableColumn<Long> = longColumn("task:submit_time")
+
+/**
+ * A column containing the wait time of the task.
+ */
+@JvmField
+public val TASK_WAIT_TIME: TableColumn<Long> = longColumn("task:wait_time")
+
+/**
+ * A column containing the runtime time of the task.
+ */
+@JvmField
+public val TASK_RUNTIME: TableColumn<Long> = longColumn("task:runtime")
+
+/**
+ * A column containing the parents of a task.
+ */
+@Suppress("UNCHECKED_CAST")
+@JvmField
+public val TASK_PARENTS: TableColumn<Set<Long>> = TableColumn("task:parents", type = Set::class.java as Class<Set<Long>>)
+
+/**
+ * A column containing the children of a task.
+ */
+@Suppress("UNCHECKED_CAST")
+@JvmField
+public val TASK_CHILDREN: TableColumn<Set<Long>> = TableColumn("task:children", type = Set::class.java as Class<Set<Long>>)
+
+/**
+ * A column containing the requested CPUs of a task.
+ */
+@JvmField
+public val TASK_REQ_NCPUS: TableColumn<Int> = intColumn("task:req_ncpus")
+
+/**
+ * A column containing the allocated CPUs of a task.
+ */
+@JvmField
+public val TASK_ALLOC_NCPUS: TableColumn<Int> = intColumn("task:alloc_ncpus")
+
+/**
+ * A column containing the status of a task.
+ */
+@JvmField
+public val TASK_STATUS: TableColumn<Int> = intColumn("task:status")
+
+/**
+ * A column containing the group id of a task.
+ */
+@JvmField
+public val TASK_GROUP_ID: TableColumn<Int> = intColumn("task:group_id")
+
+/**
+ * A column containing the user id of a task.
+ */
+@JvmField
+public val TASK_USER_ID: TableColumn<Int> = intColumn("task:user_id")