xerial.core.util.JavaProcess.scala Maven / Gradle / Ivy
/*
* Copyright 2012 Taro L. Saito
*
* Licensed 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 xerial.core.util
import xerial.core.io.text.LineReader
import xerial.core.log.Logger
//-------------------------------------
//
// JavaProcess.scala
// Since: 2012/08/02 10:05
//
//--------------------------------------
case class JProcess(id:Int, name:String, cmd:String)
/**
* @author leo
*/
object JavaProcess extends Logger {
private val jpsPattern = """([0-9]+)\s+(\S+)\s+(\S.*)""".r
/**
* Obtain a list of java processes running in this machine
* @return
*/
def list : Seq[JProcess] = {
val cmd = Shell.findJavaCommand("jps")
if(cmd.isEmpty) {
warn("no jps command is found. Set PATH or JAVA_HOME properly.")
Seq.empty
}
else {
val ls = for{
line <- scala.sys.process.Process("%s -v".format(cmd.get)).lines.toSeq
m <- jpsPattern.findFirstMatchIn(line)
} yield JProcess(m.group(1).toInt, m.group(2), m.group(3))
ls.toIndexedSeq
}
}
}