Github user mgummelt commented on a diff in the pull request:
https://github.com/apache/spark/pull/18220#discussion_r120997425
--- Diff:
resource-managers/mesos/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosProtoUtils.scala
---
@@ -0,0 +1,94 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.scheduler.cluster.mesos
+
+import org.apache.mesos.Protos
+
+import org.apache.spark.SparkException
+import org.apache.spark.internal.Logging
+
+object MesosProtoUtils extends Logging {
+
+ /** Parses a label string of the format specified in
spark.mesos.task.labels. */
+ def mesosLabels(labelsStr: String): Protos.Labels.Builder = {
+ var key: Option[String] = None
+ var value: Option[String] = None
+ var currStr = ""
+ var i = 0
+ val labels = Protos.Labels.newBuilder()
+
+ // 0 -> parsing key
+ // 1 -> parsing value
+ var state = 0
--- End diff --
I simplified it, but I can't do a simple regex splitting, because I have to
condition the match on characters (the escape sequence), that shouldn't
actually be considered part of the matched string. So I just wrote a custom
`splitUnescaped` method to implement what I need.
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