Fix Failing Logging capture (#82)

* Fix Failing Logging capture

* Remove unused methods

* Add issue-79 example

* Rename private getLogLevelInt method, add tests

README.md

@@ -83,9 +83,8 @@ val json =
      |}
   """.stripMargin
 
-val pipeline = Pipeline(json)
+val pipeline = Pipeline(json, LogLevel.Debug5) // initialize and make it really noisy
 pipeline.validate() // check if our JSON and options were good
-pipeline.setLogLevel(LogLevel.Debug5) // make it really noisy
 pipeline.execute() // execute the pipeline
 val metadata = pipeline.getMetadata() // retrieve metadata
 val pvs      = pipeline.getPointViews() // iterator over PointViews

core/src/main/scala/io/pdal/LogLevel.scala

@@ -24,15 +24,6 @@
 
 package io.pdal
 
-object LogLevel {
-  val Error = 0
-  val Warning = 1
-  val Info = 2
-  val Debug = 3
-  val Debug1 = 4
-  val Debug2 = 5
-  val Debug3 = 6
-  val Debug4 = 7
-  val Debug5 = 8
-  val None = 9
+object LogLevel extends Enumeration {
+  val Error, Warning, Info, Debug, Debug1, Debug2, Debug3, Debug4, Debug5 = Value
 }

core/src/main/scala/io/pdal/Pipeline.scala

@@ -26,8 +26,10 @@ package io.pdal
 
 import com.github.sbt.jni.syntax.NativeLoader
 
-class Pipeline(val json: String, val logLevel: Int) extends Native {
-  Pipeline // reference the object so that the nativeLoader will load the JNI native libraries
+class Pipeline private (val json: String, val logLevel: Int) extends Native {
+  Pipeline // reference companion object so nativeLoader loads the JNI native libraries
+
+  def this(json: String, logLevel: LogLevel.Value = LogLevel.Error) = this(json, logLevel.id)
 
   @native def initialize(): Unit
   @native def execute(): Unit
@@ -39,13 +41,13 @@ class Pipeline(val json: String, val logLevel: Int) extends Native {
   @native def getSchema(): String
   @native def getQuickInfo(): String
   @native def validate(): Boolean
-  @native def setLogLevel(i: Int): Unit
-  @native def getLogLevel(): Int
-  @native def getLog(): String
+  @native private def getLogLevelInt(): Int
+
+  def getLogLevel(): LogLevel.Value = LogLevel.apply(getLogLevelInt())
 }
 
 object Pipeline extends NativeLoader("pdaljni.2.6") {
-  def apply(json: String, logLevel: Int = LogLevel.Error): Pipeline = {
+  def apply(json: String, logLevel: LogLevel.Value = LogLevel.Error): Pipeline = {
     val p = new Pipeline(json, logLevel); p.initialize(); p
   }
 }

core/src/test/scala/io/pdal/PipelineSpec.scala

@@ -46,6 +46,11 @@ class PipelineSpec extends TestEnvironmentSpec {
       pipeline.execute()
     }
 
+    it("should get pipeline LogLevel") {
+      pipeline.getLogLevel() shouldBe LogLevel.Error
+      pipeline.getLogLevel() shouldBe LogLevel(pipeline.logLevel)
+    }
+
     it("should create pointViews iterator") {
       val pvi = pipeline.getPointViews()
       pvi.asScala.length should be(1)

examples/pdal-jni/src/main/scala/com/azavea/MainLogging.scala

@@ -0,0 +1,34 @@
+import io.pdal.Pipeline
+
+object MainLogging {
+  val json =
+    """
+      |{
+      |  "pipeline": [
+      |    {
+      |      "filename": "data/issue-79.las",
+      |      "type": "readers.las",
+      |      "spatialreference": "EPSG:2056"
+      |    },
+      |    {
+      |      "distance": 250,
+      |      "type": "filters.crop",
+      |      "point": "POINT(2717706.2 1103466.2 677.54)"
+      |    },
+      |    {
+      |      "count": 100000,
+      |      "decay": 0.9,
+      |      "type": "filters.relaxationdartthrowing",
+      |      "radius": 1
+      |    }
+      |  ]
+      |}
+    """.stripMargin
+
+  def main(args: Array[String]) = {
+    val pipeline = Pipeline(json, LogLevel.Debug)
+    pipeline.execute()
+    println(s"pipeline.getMetadata(): ${pipeline.getMetadata()}")
+    pipeline.close()
+  }
+}

native/src/JavaPipeline.cpp

@@ -36,8 +36,6 @@
 #include <pdal/XMLSchema.hpp>
 #endif
 
-using pdal::LogLevel;
-using pdal::LogPtr;
 using pdal::MetadataNode;
 using pdal::PointId;
 using pdal::PointViewSet;
@@ -64,14 +62,9 @@ PipelineExecutor::PipelineExecutor(string const& json, int level)
 {
     setLogLevel(level);
 
-    LogPtr log(pdal::Log::makeLog("javapipeline", &m_logStream));
-    log->setLevel(m_logLevel);
-    m_manager.setLog(log);
-
     stringstream strm;
     strm << json;
     m_manager.readPipeline(strm);
-
 }
 
 bool PipelineExecutor::validate()
@@ -123,7 +116,6 @@ string PipelineExecutor::getPipeline() const
     return strm.str();
 }
 
-
 string PipelineExecutor::getMetadata() const
 {
     if (!m_executed)
@@ -135,7 +127,6 @@ string PipelineExecutor::getMetadata() const
     return strm.str();
 }
 
-
 string PipelineExecutor::getSchema() const
 {
     if (!m_executed)
@@ -188,7 +179,6 @@ MetadataNode computePreview(Stage* stage)
     return summary;
 }
 
-
 string PipelineExecutor::getQuickInfo() const
 {
 
@@ -217,25 +207,18 @@ string PipelineExecutor::getQuickInfo() const
     return strm.str();
 }
 
-void PipelineExecutor::setLogStream(std::ostream& strm)
-{
-
-    LogPtr log(pdal::Log::makeLog("javapipeline", &strm));
-    log->setLevel(m_logLevel);
-    m_manager.setLog(log);
-}
-
-
 void PipelineExecutor::setLogLevel(int level)
 {
-    if (level < static_cast<int>(LogLevel::Error) || level > static_cast<int>(LogLevel::None))
-        throw java_error("LogLevel should be between 0 and 9");
+    if (level < 0 || level > 8)
+        throw java_error("LogLevel should be between 0 and 8!");
 
     m_logLevel = static_cast<pdal::LogLevel>(level);
-    setLogStream(m_logStream);
+
+    pdal::LogPtr log(pdal::Log::makeLog("javapipeline", "stdlog"));
+    log->setLevel(m_logLevel);
+    m_manager.setLog(log);
 }
 
-
 int PipelineExecutor::getLogLevel() const
 {
     return static_cast<int>(m_logLevel);

native/src/include/JavaPipeline.hpp

@@ -73,9 +73,7 @@ class PDAL_DLL PipelineExecutor {
     std::string getSchema() const;
     std::string getSrsWKT2() const;
     pdal::PipelineManager const& getManager() const { return m_manager; }
-    void setLogLevel(int level);
     int getLogLevel() const;
-    std::string getLog() const { return m_logStream.str(); }
 
 protected:
     virtual pdal::ConstPointTableRef pointTable() const { return m_manager.pointTable(); }
@@ -84,9 +82,9 @@ class PDAL_DLL PipelineExecutor {
     bool m_executed = false;
 
 private:
-    void setLogStream(std::ostream& strm);
-    std::stringstream m_logStream;
     pdal::LogLevel m_logLevel;
+
+    void setLogLevel(int level);
 };
 
 class CountPointTable : public pdal::FixedPointTable

native/src/io_pdal_Pipeline.cpp

@@ -191,27 +191,13 @@ JNIEXPORT jboolean JNICALL Java_io_pdal_Pipeline_validate
     return result;
 }
 
-JNIEXPORT void JNICALL Java_io_pdal_Pipeline_setLogLevel
-  (JNIEnv *env, jobject obj, jint i)
-{
-    PipelineExecutor *p = getHandle<PipelineExecutor>(env, obj);
-    p->setLogLevel(i);
-}
-
-JNIEXPORT jint JNICALL Java_io_pdal_Pipeline_getLogLevel
+JNIEXPORT jint JNICALL Java_io_pdal_Pipeline_getLogLevelInt
   (JNIEnv *env, jobject obj)
 {
     PipelineExecutor *p = getHandle<PipelineExecutor>(env, obj);
     return p->getLogLevel();
 }
 
-JNIEXPORT jstring JNICALL Java_io_pdal_Pipeline_getLog
-  (JNIEnv *env, jobject obj)
-{
-    PipelineExecutor *p = getHandle<PipelineExecutor>(env, obj);
-    return env->NewStringUTF(p->getLog().c_str());
-}
-
 JNIEXPORT jobject JNICALL Java_io_pdal_Pipeline_getPointViews
   (JNIEnv *env, jobject obj)
 {