Add default properties to deal with no configure file situation

core/src/main/scala/spark/metrics/MetricsConfig.scala

 package spark.metrics
 
 import java.util.Properties
-import java.io.FileInputStream
+import java.io.{File, FileInputStream}
 
 import scala.collection.mutable
 import scala.util.matching.Regex
 
 private [spark] class MetricsConfig(val configFile: String) {
   val properties = new Properties()
-  var fis: FileInputStream = _
+  // Add default properties in case there's no properties file
+  MetricsConfig.setDefaultProperties(properties)
   
-  try {
-    fis = new FileInputStream(configFile)
-    properties.load(fis)
-  } finally {
-    fis.close()
+  val confFile = new File(configFile)
+  if (confFile.exists()) {
+	var fis: FileInputStream = null
+    try {
+      fis = new FileInputStream(configFile)
+      properties.load(fis)
+    } finally {
+      fis.close()
+    }
   }
   
   val propertyCategories = MetricsConfig.subProperties(properties, MetricsConfig.INSTANCE_REGEX)
@@ -35,11 +40,15 @@ private [spark] class MetricsConfig(val configFile: String) {
   }
 }
 
-object MetricsConfig {
-  val DEFAULT_CONFIG_FILE = "conf/metrics.properties"
+private[spark] object MetricsConfig {
   val DEFAULT_PREFIX = "*"
   val INSTANCE_REGEX = "^(\\*|[a-zA-Z]+)\\.(.+)".r
   
+  def setDefaultProperties(prop: Properties) {
+    prop.setProperty("*.sink.jmx.enabled", "default")
+    prop.setProperty("*.source.jvm.class", "spark.metrics.source.JvmSource")
+  }
+  
   def subProperties(prop: Properties, regex: Regex) = {
     val subProperties = new mutable.HashMap[String, Properties]
     
@@ -48,7 +57,6 @@ object MetricsConfig {
       if (regex.findPrefixOf(kv._1) != None) {
         val regex(prefix, suffix) = kv._1
         subProperties.getOrElseUpdate(prefix, new Properties).setProperty(suffix, kv._2)
-        println(">>>>>subProperties added  " + prefix + " " + suffix + " " + kv._2)
       }
     }
     

core/src/main/scala/spark/metrics/MetricsSystem.scala

@@ -14,7 +14,7 @@ import spark.metrics.source._
 private[spark] class MetricsSystem private (val instance: String) extends Logging {
   initLogging()
   
-  val confFile = System.getProperty("spark.metrics.conf.file", MetricsConfig.DEFAULT_CONFIG_FILE)
+  val confFile = System.getProperty("spark.metrics.conf.file", "unsupported")
   val metricsConfig = new MetricsConfig(confFile)
   
   val sinks = new mutable.ArrayBuffer[Sink]
@@ -58,9 +58,6 @@ private[spark] class MetricsSystem private (val instance: String) extends Loggin
     val instConfig = metricsConfig.getInstance(instance)
     val sinkConfigs = MetricsConfig.subProperties(instConfig, MetricsSystem.SINK_REGEX)
     
-    // Register JMX sink as a default sink
-    sinks += new JmxSink(registry)
-    
     // Register other sinks according to conf
     sinkConfigs.foreach { kv =>
       val classPath = if (MetricsSystem.DEFAULT_SINKS.contains(kv._1)) {
@@ -81,9 +78,7 @@ private[spark] class MetricsSystem private (val instance: String) extends Loggin
 }
 
 private[spark] object MetricsSystem {
-  val DEFAULT_SINKS = Map(
-      "console" -> "spark.metrics.sink.ConsoleSink",
-      "csv" -> "spark.metrics.sink.CsvSink")
+  val DEFAULT_SINKS = Map("jmx" -> "spark.metrics.sink.JmxSink")
       
   val SINK_REGEX = "^sink\\.(.+)\\.(.+)".r
   val SOURCE_REGEX = "^source\\.(.+)\\.(.+)".r

core/src/main/scala/spark/metrics/sink/ConsoleSink.scala

 package spark.metrics.sink
 
+import com.codahale.metrics.{ConsoleReporter, MetricRegistry}
+
 import java.util.Properties
 import java.util.concurrent.TimeUnit
 
-import com.codahale.metrics.{ConsoleReporter, MetricRegistry}
-
 import spark.metrics.MetricsSystem
 
 class ConsoleSink(val property: Properties, val registry: MetricRegistry) extends Sink {
@@ -18,7 +18,7 @@ class ConsoleSink(val property: Properties, val registry: MetricRegistry) extend
     case None => MetricsSystem.timeUnits(ConsoleSink.CONSOLE_DEFAULT_UNIT)
   }
   
-  var reporter: ConsoleReporter = ConsoleReporter.forRegistry(registry)
+  val reporter: ConsoleReporter = ConsoleReporter.forRegistry(registry)
       .convertDurationsTo(TimeUnit.MILLISECONDS)
       .convertRatesTo(TimeUnit.SECONDS)
       .build()

core/src/main/scala/spark/metrics/sink/CsvSink.scala

 package spark.metrics.sink
 
+import com.codahale.metrics.{CsvReporter, MetricRegistry}
+
 import java.io.File
 import java.util.{Locale, Properties}
 import java.util.concurrent.TimeUnit
 
-import com.codahale.metrics.{CsvReporter, MetricRegistry}
-
 import spark.metrics.MetricsSystem
 
 class CsvSink(val property: Properties, val registry: MetricRegistry) extends Sink {
@@ -24,7 +24,7 @@ class CsvSink(val property: Properties, val registry: MetricRegistry) extends Si
     case None => CsvSink.CSV_DEFAULT_DIR
   }
   
-  var reporter: CsvReporter = CsvReporter.forRegistry(registry)
+  val reporter: CsvReporter = CsvReporter.forRegistry(registry)
       .formatFor(Locale.US)
       .convertDurationsTo(TimeUnit.MILLISECONDS)
       .convertRatesTo(TimeUnit.SECONDS)

core/src/main/scala/spark/metrics/sink/JmxSink.scala

 package spark.metrics.sink
 
+import java.util.Properties
+
 import com.codahale.metrics.{JmxReporter, MetricRegistry}
 
-class JmxSink(registry: MetricRegistry) extends Sink {
-  var reporter: JmxReporter = JmxReporter.forRegistry(registry).build()
+class JmxSink(val property: Properties, val registry: MetricRegistry) extends Sink {
+  val reporter: JmxReporter = JmxReporter.forRegistry(registry).build()
   
   override def start() {
     reporter.start()