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Merge branch 'master' of github.com:twitter/finagle

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2 parents 44fcc4a + 2c01daf commit a4d848e69a73f827424beacfce7c08efb13ee359 wilhelm bierbaum committed Feb 24, 2011
Showing with 271 additions and 104 deletions.
  1. +11 −1 finagle-core/src/main/scala/com/twitter/finagle/builder/ChannelFactory.scala
  2. +24 −10 finagle-core/src/main/scala/com/twitter/finagle/builder/ServerBuilder.scala
  3. +2 −2 finagle-core/src/main/scala/com/twitter/finagle/channel/ChannelService.scala
  4. +1 −1 finagle-core/src/main/scala/com/twitter/finagle/channel/ServiceToChannelHandler.scala
  5. +3 −3 finagle-core/src/main/scala/com/twitter/finagle/pool/CachingPool.scala
  6. +2 −2 finagle-core/src/main/scala/com/twitter/finagle/service/StatsFilter.scala
  7. +74 −0 finagle-core/src/main/scala/com/twitter/finagle/stats/CumulativeGauge.scala
  8. +15 −3 finagle-core/src/main/scala/com/twitter/finagle/stats/JavaLoggerStatsReceiver.scala
  9. +38 −6 finagle-core/src/main/scala/com/twitter/finagle/stats/StatsReceiver.scala
  10. +67 −0 finagle-core/src/test/scala/com/twitter/finagle/stats/CumulativeGaugeSpec.scala
  11. +3 −3 finagle-example/src/main/scala/com/twitter/finagle/example/echo/EchoClient.scala
  12. +0 −26 finagle-ostrich/src/main/scala/com/twitter/finagle/stats/AdditiveGauges.scala
  13. +9 −5 finagle-ostrich/src/main/scala/com/twitter/finagle/stats/OstrichStatsReceiver.scala
  14. +0 −26 finagle-ostrich3/src/main/scala/com/twitter/finagle/stats/AdditiveGauges.scala
  15. +9 −5 finagle-ostrich3/src/main/scala/com/twitter/finagle/stats/OstrichStatsReceiver.scala
  16. +9 −7 finagle-stream/src/main/scala/com/twitter/finagle/stream/ChannelToHttpChunk.scala
  17. +2 −2 project/build.properties
  18. +2 −2 project/build/Project.scala
View
12 finagle-core/src/main/scala/com/twitter/finagle/builder/ChannelFactory.scala
@@ -43,8 +43,18 @@ class LazyRevivableChannelFactory(make: () => ChannelFactory)
}
def releaseExternalResources() = synchronized {
+ var thread: Thread = null
+
if (underlying ne null) {
- underlying.releaseExternalResources()
+ // releaseExternalResources must be called in a non-Netty
+ // thread, otherwise it can lead to a deadlock.
+ val _underlying = underlying
+ thread = new Thread {
+ override def run = {
+ _underlying.releaseExternalResources()
+ }
+ }
+ thread.start()
underlying = null
}
}
View
34 finagle-core/src/main/scala/com/twitter/finagle/builder/ServerBuilder.scala
@@ -170,16 +170,24 @@ case class ServerBuilder[Req, Rep](
_recvBufferSize foreach { s => bs.setOption("receiveBufferSize", s) }
// TODO: we need something akin to a max queue depth.
- val queueingChannelHandler = _maxConcurrentRequests map { maxConcurrentRequests =>
- val semaphore = new AsyncSemaphore(maxConcurrentRequests)
- scopedStatsReceiver foreach { sr =>
- sr.provideGauge("request_concurrency") {
- maxConcurrentRequests - semaphore.numPermitsAvailable
+ val queueingChannelHandlerAndGauges =
+ _maxConcurrentRequests map { maxConcurrentRequests =>
+ val semaphore = new AsyncSemaphore(maxConcurrentRequests)
+ val gauges = scopedStatsReceiver.toList flatMap { sr =>
+ sr.addGauge("request_concurrency") {
+ maxConcurrentRequests - semaphore.numPermitsAvailable
+ } :: sr.addGauge("request_queue_size") {
+ semaphore.numWaiters
+ } :: Nil
}
- sr.provideGauge("request_queue_size") { semaphore.numWaiters }
+
+ (new ChannelSemaphoreHandler(semaphore), gauges)
}
- new ChannelSemaphoreHandler(semaphore)
- }
+
+ val queueingChannelHandler =
+ queueingChannelHandlerAndGauges map { case (q, _) => q }
+ val gauges =
+ queueingChannelHandlerAndGauges.toList flatMap { case (_, g) => g }
trait ChannelHandle {
def drain(): Future[Unit]
@@ -188,6 +196,9 @@ case class ServerBuilder[Req, Rep](
val channels = new HashSet[ChannelHandle]
+ // Share this stats receiver to avoid per-connection overhead.
+ val statsFilter = scopedStatsReceiver map { new StatsFilter[Req, Rep](_) }
+
bs.setPipelineFactory(new ChannelPipelineFactory {
def getPipeline = {
val pipeline = codec.serverPipelineFactory.getPipeline
@@ -219,8 +230,8 @@ case class ServerBuilder[Req, Rep](
// Compose the service stack.
var service = codec.wrapServerChannel(serviceFactory())
- scopedStatsReceiver foreach { sr =>
- service = (new StatsFilter(sr)) andThen service
+ statsFilter foreach { sf =>
+ service = sf andThen service
}
// We add the idle time after the codec. This ensures that a
@@ -311,6 +322,9 @@ case class ServerBuilder[Req, Rep](
// deadlocking.
channels.synchronized { channels toArray } foreach { _.close() }
+ // Release any gauges we've created.
+ gauges foreach { _.remove() }
+
bs.releaseExternalResources()
Timer.default.stop()
}
View
4 finagle-core/src/main/scala/com/twitter/finagle/channel/ChannelService.scala
@@ -98,8 +98,8 @@ class ChannelServiceFactory[Req, Rep](
{
private[this] val channelLatch = new AsyncLatch
private[this] val connectLatencyStat = statsReceiver.stat("connect_latency_ms")
-
- statsReceiver.provideGauge("connections") { channelLatch.getCount }
+ private[this] val gauge =
+ statsReceiver.addGauge("connections") { channelLatch.getCount }
protected[channel] def channelReleased(channel: ChannelService[Req, Rep]) {
channelLatch.decr()
View
2 finagle-core/src/main/scala/com/twitter/finagle/channel/ServiceToChannelHandler.scala
@@ -88,7 +88,7 @@ class ServiceToChannelHandler[Req, Rep](service: Service[Req, Rep], log: Logger)
}
case Throw(e: Throwable) =>
- log.log(Level.WARNING, e.getMessage, e)
+ log.log(Level.WARNING, "service exception", e)
shutdown()
}
} catch {
View
6 finagle-core/src/main/scala/com/twitter/finagle/pool/CachingPool.scala
@@ -12,9 +12,9 @@ import com.twitter.finagle.util.Timer
* the given timeout amount of time.
*/
class CachingPool[Req, Rep](
- factory: ServiceFactory[Req, Rep],
- timeout: Duration,
- timer: com.twitter.util.Timer = Timer.default)
+ factory: ServiceFactory[Req, Rep],
+ timeout: Duration,
+ timer: com.twitter.util.Timer = Timer.default)
extends ServiceFactory[Req, Rep]
{
private[this] val deathRow = Queue[(Time, Service[Req, Rep])]()
View
4 finagle-core/src/main/scala/com/twitter/finagle/service/StatsFilter.scala
@@ -13,8 +13,8 @@ class StatsFilter[Req, Rep](statsReceiver: StatsReceiver)
private[this] val dispatchCount = statsReceiver.counter("requests")
private[this] val successCount = statsReceiver.counter("success")
private[this] val latencyStat = statsReceiver.stat("request_latency_ms")
-
- statsReceiver.provideGauge("pending") { outstandingRequestCount.get }
+ private[this] val outstandingRequestCountgauge =
+ statsReceiver.addGauge("pending") { outstandingRequestCount.get }
def apply(request: Req, service: Service[Req, Rep]): Future[Rep] = {
val requestedAt = Time.now
View
74 finagle-core/src/main/scala/com/twitter/finagle/stats/CumulativeGauge.scala
@@ -0,0 +1,74 @@
+package com.twitter.finagle.stats
+
+/**
+ * CumulativeGauge provides a gauge that is composed of the (addition)
+ * of several underlying gauges. It follows the weak reference
+ * semantics of Gauges as outlined in StatsReceiver.
+ */
+
+import ref.WeakReference
+import collection.mutable.WeakHashMap
+
+trait CumulativeGauge {
+ private[this] case class UnderlyingGauge(f: () => Float) extends Gauge {
+ def remove() { removeGauge(this) }
+ }
+
+ private[this] var underlying: List[WeakReference[UnderlyingGauge]] = Nil
+
+ private[this] def get() = synchronized {
+ removeGauge(null) // GC.
+ underlying map { _.get } flatten
+ }
+
+ private[this] def removeGauge(underlyingGauge: UnderlyingGauge) = synchronized {
+ // This does a GC also.
+ underlying = underlying filter { _.get map { _ ne underlyingGauge } getOrElse false }
+ if (underlying.isEmpty)
+ deregister()
+ }
+
+ def addGauge(f: => Float): Gauge = synchronized {
+ val shouldRegister = underlying.isEmpty
+ val underlyingGauge = UnderlyingGauge(() => f)
+ underlying ::= new WeakReference(underlyingGauge)
+
+ if (shouldRegister)
+ register()
+
+ underlyingGauge
+ }
+
+ def getValue = synchronized {
+ get() map { _.f() } sum
+ }
+
+ /**
+ * These need to be implemented by the gauge provider. They indicate
+ * when the gauge needs to be registered & deregistered.
+ */
+ def register(): Unit
+ def deregister(): Unit
+}
+
+trait StatsReceiverWithCumulativeGauges extends StatsReceiver {
+ private[this] val gaugeMap = new WeakHashMap[Seq[String], CumulativeGauge]
+
+ /**
+ * The StatsReceiver implements these. They provide the cumulated
+ * gauges.
+ */
+ protected[this] def registerGauge(name: Seq[String], f: => Float)
+ protected[this] def deregisterGauge(name: Seq[String])
+
+ def addGauge(name: String*)(f: => Float) = synchronized {
+ val cumulativeGauge = gaugeMap getOrElseUpdate(name, {
+ new CumulativeGauge {
+ def register() = StatsReceiverWithCumulativeGauges.this.registerGauge(name, getValue)
+ def deregister() = StatsReceiverWithCumulativeGauges.this.deregisterGauge(name)
+ }
+ })
+
+ cumulativeGauge.addGauge(f)
+ }
+}
View
18 finagle-core/src/main/scala/com/twitter/finagle/stats/JavaLoggerStatsReceiver.scala
@@ -1,12 +1,18 @@
package com.twitter.finagle.stats
+import collection.mutable.HashMap
+
import java.util.logging.Logger
import com.twitter.conversions.time._
import com.twitter.util
import com.twitter.finagle.util.Conversions._
import com.twitter.finagle.util.Timer
-class JavaLoggerStatsReceiver(logger: Logger, timer: util.Timer) extends StatsReceiver {
+class JavaLoggerStatsReceiver(logger: Logger, timer: util.Timer)
+ extends StatsReceiverWithCumulativeGauges
+{
+ var timerTasks = new HashMap[Seq[String], util.TimerTask]
+
def this(logger: Logger) = this(logger, Timer.default)
def stat(name: String*) = new Stat {
@@ -21,12 +27,18 @@ class JavaLoggerStatsReceiver(logger: Logger, timer: util.Timer) extends StatsRe
}
}
- def provideGauge(name: String*)(f: => Float) {
- timer.schedule(10.seconds) {
+ protected[this] def registerGauge(name: Seq[String], f: => Float) = synchronized {
+ deregisterGauge(name)
+
+ timerTasks(name) = timer.schedule(10.seconds) {
logger.info("%s %2f".format(formatName(name), f))
}
}
+ protected[this] def deregisterGauge(name: Seq[String]) {
+ timerTasks.remove(name) foreach { _.cancel() }
+ }
+
private[this] def formatName(description: Seq[String]) = {
description mkString "/"
}
View
44 finagle-core/src/main/scala/com/twitter/finagle/stats/StatsReceiver.scala
@@ -16,6 +16,14 @@ trait Stat {
def add(value: Float)
}
+trait Gauge {
+ def remove()
+}
+
+object StatsReceiver {
+ private[StatsReceiver] var immortalGauges: List[Gauge] = Nil
+}
+
trait StatsReceiver {
/**
* Get a Counter with the description
@@ -28,9 +36,27 @@ trait StatsReceiver {
def stat(name: String*): Stat
/**
- * Register a function to be periodically measured.
+ * Register a function to be periodically measured. This measurement
+ * exists in perpetuity. Measurements under the same name are added
+ * together.
*/
- def provideGauge(name: String*)(f: => Float)
+ def provideGauge(name: String*)(f: => Float) {
+ val gauge = addGauge(name: _*)(f)
+ StatsReceiver.synchronized {
+ StatsReceiver.immortalGauges ::= gauge
+ }
+ }
+
+ /**
+ * Add the function ``f'' as a gauge with the given name. The
+ * returned gauge value is only weakly referenced by the
+ * StatsReceiver, and if garbage collected will cease to be a part
+ * of this measurement: thus, it needs to be retained by the
+ * caller. Immortal measurements are made with ``provideGauge''. As
+ * with ``provideGauge'', gauges with equal names are added
+ * together.
+ */
+ def addGauge(name: String*)(f: => Float): Gauge
/**
* Prepend ``namespace'' to the names of this receiver.
@@ -42,6 +68,9 @@ trait StatsReceiver {
}
}
+ /**
+ * Append ``namespace'' to the names of this receiver.
+ */
def withSuffix(namespace: String) = {
val seqSuffix = Seq(namespace)
new NameTranslatingStatsReceiver(this) {
@@ -73,8 +102,10 @@ class RollupStatsReceiver(val self: StatsReceiver)
def add(value: Float) = allStats foreach (_.add(value))
}
- def provideGauge(name: String*)(f: => Float) =
- tails(name) foreach { self.provideGauge(_: _*)(f) }
+ def addGauge(name: String*)(f: => Float) = new Gauge {
+ private[this] val underlying = tails(name) map { self.addGauge(_: _*)(f) }
+ def remove() = underlying foreach { _.remove() }
+ }
}
abstract class NameTranslatingStatsReceiver(val self: StatsReceiver)
@@ -84,7 +115,8 @@ abstract class NameTranslatingStatsReceiver(val self: StatsReceiver)
def counter(name: String*) = self.counter(translate(name): _*)
def stat(name: String*) = self.stat(translate(name): _*)
- def provideGauge(name: String*)(f: => Float) = self.provideGauge(translate(name): _*)(f)
+
+ def addGauge(name: String*)(f: => Float) = self.addGauge(translate(name): _*)(f)
}
object NullStatsReceiver extends StatsReceiver {
@@ -96,5 +128,5 @@ object NullStatsReceiver extends StatsReceiver {
def add(value: Float) {}
}
- def provideGauge(name: String*)(f: => Float) {}
+ def addGauge(name: String*)(f: => Float) = new Gauge { def remove() {} }
}
View
67 finagle-core/src/test/scala/com/twitter/finagle/stats/CumulativeGaugeSpec.scala
@@ -0,0 +1,67 @@
+package com.twitter.finagle.stats
+
+import org.specs.Specification
+import org.specs.mock.Mockito
+
+object CumulativeGaugeSpec extends Specification with Mockito {
+ class TestGauge extends CumulativeGauge {
+ def register() {}
+ def deregister() {}
+ }
+
+ "an empty CumulativeGauge" should {
+ val gauge = spy(new TestGauge)
+ there was no(gauge).register()
+
+ "register on the first gauge added" in {
+ gauge.addGauge { 0.0f }
+ there was one(gauge).register()
+ }
+ }
+
+ "a CumulativeGauge with size = 1" should {
+ val gauge = spy(new TestGauge)
+ var added = gauge.addGauge { 1.0f }
+ there was no(gauge).deregister()
+
+ "deregister when all gauges are removed" in {
+ added.remove()
+ there was one(gauge).deregister()
+ }
+
+ "not deregister after a System.gc when there are still valid references to the gauge" in {
+ System.gc()
+
+ // We have to incite some action for the weakref GC to take place.
+ gauge.getValue must be_==(1.0f)
+ there was no(gauge).deregister()
+ }
+
+ "deregister after a System.gc when no references are held onto" in {
+ added = null
+ System.gc()
+
+ // We have to incite some action for the weakref GC to take place.
+ gauge.getValue must be_==(0.0f)
+ there was one(gauge).deregister()
+ }
+ }
+
+ "a CumulativeGauge" should {
+ val gauge = spy(new TestGauge)
+
+ "sum values across all registered gauges" in {
+ 0 until 100 foreach { _ => gauge.addGauge { 10.0f } }
+ gauge.getValue must be_==(10.0f * 100)
+ }
+
+ "discount gauges once removed" in {
+ val underlying = 0 until 100 map { _ => gauge.addGauge { 10.0f } }
+ gauge.getValue must be_==(10.0f * 100)
+ underlying(0).remove()
+ gauge.getValue must be_==(10.0f * 99)
+ underlying(1).remove()
+ gauge.getValue must be_==(10.0f * 98)
+ }
+ }
+}
View
6 finagle-example/src/main/scala/com/twitter/finagle/example/echo/EchoClient.scala
@@ -11,13 +11,13 @@ object EchoClient {
.build()
// Issue request:
- client("hi mom\n") onSuccess { result =>
+ val result = client("hi mom\n")
+ result onSuccess { result =>
println("Received result: " + result)
} onFailure { error =>
error.printStackTrace()
} ensure {
- // All done! Close TCP connection:
- println("releasin")
+ // All done! Close TCP connection(s):
client.release()
}
}
View
26 finagle-ostrich/src/main/scala/com/twitter/finagle/stats/AdditiveGauges.scala
@@ -1,26 +0,0 @@
-package com.twitter.finagle.stats
-
-/**
- * AdditiveGauges provide composite gauges on top of Ostrich. This
- * allows us to roll up gauge values.
- */
-
-import collection.mutable.HashMap
-import com.twitter.ostrich.Stats
-
-object AdditiveGauges {
- private[this] val gauges = new HashMap[String, Seq[() => Float]]
-
- def apply(name: String)(f: => Float) = synchronized {
- val fs = Seq({ () => f })
-
- if (gauges contains name) {
- gauges(name) = gauges(name) ++ fs
- } else {
- gauges(name) = fs
- Stats.makeGauge(name) {
- AdditiveGauges.this.synchronized { gauges(name) map (_()) sum }
- }
- }
- }
-}
View
14 finagle-ostrich/src/main/scala/com/twitter/finagle/stats/OstrichStatsReceiver.scala
@@ -2,7 +2,15 @@ package com.twitter.finagle.stats
import com.twitter.ostrich.Stats
-class OstrichStatsReceiver extends StatsReceiver {
+class OstrichStatsReceiver extends StatsReceiverWithCumulativeGauges {
+ protected[this] def registerGauge(name: Seq[String], f: => Float) {
+ Stats.makeGauge(variableName(name)) { f }
+ }
+
+ protected[this] def deregisterGauge(name: Seq[String]) {
+ Stats.clearGauge(variableName(name))
+ }
+
def counter(name: String*) = new Counter {
private[this] val name_ = variableName(name)
@@ -17,9 +25,5 @@ class OstrichStatsReceiver extends StatsReceiver {
}
}
- def provideGauge(name: String*)(f: => Float) = {
- AdditiveGauges(variableName(name))(f)
- }
-
private[this] def variableName(name: Seq[String]) = name mkString "/"
}
View
26 finagle-ostrich3/src/main/scala/com/twitter/finagle/stats/AdditiveGauges.scala
@@ -1,26 +0,0 @@
-package com.twitter.finagle.stats
-
-/**
- * AdditiveGauges provide composite gauges on top of Ostrich. This
- * allows us to roll up gauge values.
- */
-
-import collection.mutable.HashMap
-import com.twitter.stats.Stats
-
-object AdditiveGauges {
- private[this] val gauges = new HashMap[String, Seq[() => Float]]
-
- def apply(name: String)(f: => Float) = synchronized {
- val fs = Seq({ () => f })
-
- if (gauges contains name) {
- gauges(name) = gauges(name) ++ fs
- } else {
- gauges(name) = fs
- Stats.addGauge(name) {
- AdditiveGauges.this.synchronized { gauges(name) map (_()) sum }
- }
- }
- }
-}
View
14 finagle-ostrich3/src/main/scala/com/twitter/finagle/stats/OstrichStatsReceiver.scala
@@ -2,7 +2,15 @@ package com.twitter.finagle.stats
import com.twitter.stats.Stats
-class OstrichStatsReceiver extends StatsReceiver {
+class OstrichStatsReceiver extends StatsReceiverWithCumulativeGauges {
+ protected[this] def registerGauge(name: Seq[String], f: => Float) {
+ Stats.addGauge(variableName(name)) { f }
+ }
+
+ protected[this] def deregisterGauge(name: Seq[String]) {
+ Stats.clearGauge(variableName(name))
+ }
+
def counter(name: String*) = new Counter {
private[this] val name_ = variableName(name)
@@ -17,9 +25,5 @@ class OstrichStatsReceiver extends StatsReceiver {
}
}
- def provideGauge(name: String*)(f: => Float) = {
- AdditiveGauges(variableName(name))(f)
- }
-
private[this] def variableName(name: Seq[String]) = name mkString "/"
}
View
16 finagle-stream/src/main/scala/com/twitter/finagle/stream/ChannelToHttpChunk.scala
@@ -6,7 +6,7 @@ import org.jboss.netty.channel._
import java.util.concurrent.atomic.{AtomicReference, AtomicBoolean}
import com.twitter.concurrent.Observer
import com.twitter.finagle.util.Conversions._
-import com.twitter.finagle.util.Ok
+import com.twitter.finagle.util.{Ok, Error}
import org.jboss.netty.util.CharsetUtil
/**
@@ -28,8 +28,11 @@ class ChannelToHttpChunk extends SimpleChannelDownstreamHandler {
case channel: com.twitter.concurrent.Channel[ChannelBuffer] =>
require(state.compareAndSet(Idle, Open), "Channel is already open or busy.")
- val startMessage = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK)
- HttpHeaders.setHeader(startMessage, "Transfer-Encoding", "Chunked")
+ val startMessage = {
+ val startMessage = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK)
+ HttpHeaders.setHeader(startMessage, "Transfer-Encoding", "Chunked")
+ startMessage
+ }
val startFuture = new DefaultChannelFuture(ctx.getChannel, false)
Channels.write(ctx, startFuture, startMessage)
@@ -43,13 +46,12 @@ class ChannelToHttpChunk extends SimpleChannelDownstreamHandler {
}
state.set(Observing(observer))
channel.closes.respond { _ =>
- val closeFuture = new DefaultChannelFuture(ctx.getChannel, false)
- val result = closeFuture.toTwitterFuture
+ val closeFuture = e.getFuture
state.set(Idle)
Channels.write(ctx, closeFuture, new DefaultHttpChunkTrailer)
- result
}
- case _ =>
+ case Error(f) =>
+ e.getFuture.setFailure(f)
}
case _ =>
View
4 project/build.properties
@@ -1,8 +1,8 @@
#Project properties
-#Tue Feb 22 14:24:33 PST 2011
+#Wed Feb 23 10:35:43 PST 2011
project.organization=com.twitter
project.name=finagle
sbt.version=0.7.4
-project.version=1.1.25
+project.version=1.1.27-SNAPSHOT
build.scala.versions=2.8.1
project.initialize=false
View
4 project/build/Project.scala
@@ -95,7 +95,7 @@ class Project(info: ProjectInfo) extends StandardParentProject(info)
val nettyRepo =
"repository.jboss.org" at "http://repository.jboss.org/nexus/content/groups/public/"
val netty = "org.jboss.netty" % "netty" % "3.2.3.Final"
- val util = "com.twitter" % "util" % "1.6.7"
+ val util = "com.twitter" % "util" % "1.6.8"
val mockito = "org.mockito" % "mockito-all" % "1.8.5" % "test" withSources()
val specs = "org.scala-tools.testing" % "specs_2.8.0" % "1.6.5" % "test" withSources()
@@ -130,7 +130,7 @@ class Project(info: ProjectInfo) extends StandardParentProject(info)
}
class ExampleProject(info: ProjectInfo) extends StandardProject(info)
- with AdhocInlines
+ with SubversionPublisher with AdhocInlines
class OstrichProject(info: ProjectInfo) extends StandardProject(info)
with SubversionPublisher with AdhocInlines

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