1 files changed, 82 insertions, 0 deletions
diff --git a/kamon-jdbc/src/main/scala/kamon/jdbc/Jdbc.scala b/kamon-jdbc/src/main/scala/kamon/jdbc/Jdbc.scala
new file mode 100644
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+++ b/kamon-jdbc/src/main/scala/kamon/jdbc/Jdbc.scala
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+/* =========================================================================================
+ * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ *
+ * 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 kamon.jdbc
+
+import akka.actor.{ ExtendedActorSystem, Extension, ExtensionId, ExtensionIdProvider }
+import kamon.Kamon
+import kamon.util.ConfigTools.Syntax
+
+object Jdbc extends ExtensionId[JdbcExtension] with ExtensionIdProvider {
+  override def lookup(): ExtensionId[_ <: Extension] = Jdbc
+  override def createExtension(system: ExtendedActorSystem): JdbcExtension = new JdbcExtension(system)
+
+  val SegmentLibraryName = "jdbc"
+}
+
+class JdbcExtension(system: ExtendedActorSystem) extends Kamon.Extension {
+  private val config = system.settings.config.getConfig("kamon.jdbc")
+
+  private val nameGeneratorFQN = config.getString("name-generator")
+  private val nameGenerator: JdbcNameGenerator = system.dynamicAccess.createInstanceFor[JdbcNameGenerator](nameGeneratorFQN, Nil).get
+
+  private val slowQueryProcessorClass = config.getString("slow-query-processor")
+  private val slowQueryProcessor: SlowQueryProcessor = system.dynamicAccess.createInstanceFor[SlowQueryProcessor](slowQueryProcessorClass, Nil).get
+
+  private val sqlErrorProcessorClass = config.getString("sql-error-processor")
+  private val sqlErrorProcessor: SqlErrorProcessor = system.dynamicAccess.createInstanceFor[SqlErrorProcessor](sqlErrorProcessorClass, Nil).get
+
+  val slowQueryThreshold = config.getFiniteDuration("slow-query-threshold").toMillis
+
+  def processSlowQuery(sql: String, executionTime: Long) = slowQueryProcessor.process(sql, executionTime, slowQueryThreshold)
+  def processSqlError(sql: String, ex: Throwable) = sqlErrorProcessor.process(sql, ex)
+  def generateJdbcSegmentName(statement: String): String = nameGenerator.generateJdbcSegmentName(statement)
+}
+
+trait SlowQueryProcessor {
+  def process(sql: String, executionTime: Long, queryThreshold: Long): Unit
+}
+
+trait SqlErrorProcessor {
+  def process(sql: String, ex: Throwable): Unit
+}
+
+trait JdbcNameGenerator {
+  def generateJdbcSegmentName(statement: String): String
+}
+
+class DefaultJdbcNameGenerator extends JdbcNameGenerator {
+  def generateJdbcSegmentName(statement: String): String = s"Jdbc[$statement]"
+}
+
+class DefaultSqlErrorProcessor extends SqlErrorProcessor {
+  import org.slf4j.LoggerFactory
+
+  val log = LoggerFactory.getLogger(classOf[DefaultSqlErrorProcessor])
+
+  override def process(sql: String, cause: Throwable): Unit = {
+    log.error(s"the query [$sql] failed with exception [${cause.getMessage}]")
+  }
+}
+
+class DefaultSlowQueryProcessor extends SlowQueryProcessor {
+  import org.slf4j.LoggerFactory
+
+  val log = LoggerFactory.getLogger(classOf[DefaultSlowQueryProcessor])
+
+  override def process(sql: String, executionTimeInMillis: Long, queryThresholdInMillis: Long): Unit = {
+    log.warn(s"The query [$sql] took $executionTimeInMillis ms and the slow query threshold is $queryThresholdInMillis ms")
+  }
+}