Send a log message to Logstash

stash.groovy

def stash(msg) {
	log.debug(msg)
	def dateNow = new Date()
    // def isoDateNow = dateNow.format("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", location.timeZone)
    def isoDateNow = dateNow.format("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'")
    def json = "{"
    json += "\"date\":\"${dateNow}\","
    json += "\"isoDate\":\"${isoDateNow}\","
    json += "\"name\":\"log\","
    json += "\"message\":\"${msg}\","
    json += "\"smartapp\":\"${app.name}\""
    json += "}"
    def params = [
    	uri: "http://your.logstash.host:port",
        body: json
    ]
    try {
        httpPostJson(params)
    } catch ( groovyx.net.http.HttpResponseException ex ) {
       	log.debug "Unexpected response error: ${ex.statusCode}"
    }
}