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/*
* 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.repl
import org.apache.spark.SparkContext
import org.apache.spark.internal.Logging
import org.apache.spark.util.SignalUtils
private[repl] object Signaling extends Logging {
/**
* Register a SIGINT handler, that terminates all active spark jobs or terminates
* when no jobs are currently running.
* This makes it possible to interrupt a running shell job by pressing Ctrl+C.
*/
def cancelOnInterrupt(ctx: SparkContext): Unit = SignalUtils.register("INT") {
if (!ctx.statusTracker.getActiveJobIds().isEmpty) {
logWarning("Cancelling all active jobs, this can take a while. " +
"Press Ctrl+C again to exit now.")
ctx.cancelAllJobs()
true
} else {
false
}
}
}
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