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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.instrumentation
import java.util.concurrent.TimeUnit.{ NANOSECONDS ⇒ nanos }
import akka.actor.ActorSystem
import kamon.Kamon
import kamon.jdbc.Jdbc
import kamon.jdbc.metric.StatementsMetrics
import kamon.jdbc.metric.StatementsMetricsGroupFactory.GroupRecorder
import kamon.metric.Metrics
import kamon.trace.TraceRecorder
import org.aspectj.lang.ProceedingJoinPoint
import org.aspectj.lang.annotation.{ Around, Aspect, Pointcut }
import org.slf4j.LoggerFactory
import scala.util.control.NonFatal
@Aspect
class StatementInstrumentation {
import StatementInstrumentation._
@Pointcut("call(* java.sql.Statement.execute*(..)) && args(sql)")
def onExecuteStatement(sql: String): Unit = {}
@Pointcut("call(* java.sql.Connection.prepareStatement(..)) && args(sql)")
def onExecutePreparedStatement(sql: String): Unit = {}
@Pointcut("call(* java.sql.Connection.prepareCall(..)) && args(sql)")
def onExecutePreparedCall(sql: String): Unit = {}
@Around("onExecuteStatement(sql) || onExecutePreparedStatement(sql) || onExecutePreparedCall(sql)")
def aroundExecuteStatement(pjp: ProceedingJoinPoint, sql: String): Any = {
TraceRecorder.withTraceContextAndSystem { (ctx, system) ⇒
implicit val statementRecorder: Option[GroupRecorder] = Kamon(Metrics)(system).register(StatementsMetrics(Statements), StatementsMetrics.Factory)
sql.replaceAll(CommentPattern, Empty) match {
case SelectStatement(_) ⇒ recordRead(pjp, sql, system)
case InsertStatement(_) | UpdateStatement(_) | DeleteStatement(_) ⇒ recordWrite(pjp, sql, system)
case anythingElse ⇒
log.debug(s"Unable to parse sql [$sql]")
pjp.proceed()
}
}
} getOrElse pjp.proceed()
def withTimeSpent[A](thunk: ⇒ A)(timeSpent: Long ⇒ Unit): A = {
val start = System.nanoTime()
try thunk finally timeSpent(System.nanoTime() - start)
}
def recordRead(pjp: ProceedingJoinPoint, sql: String, system: ActorSystem)(implicit statementRecorder: Option[GroupRecorder]): Any = {
withTimeSpent(pjp.proceedWithErrorHandler(sql, system)) { timeSpent ⇒
statementRecorder.map(stmr ⇒ stmr.reads.record(timeSpent))
val timeSpentInMillis = nanos.toMillis(timeSpent)
if (timeSpentInMillis >= Jdbc(system).slowQueryThreshold) {
statementRecorder.map(stmr ⇒ stmr.slow.increment())
Jdbc(system).processSlowQuery(sql, timeSpentInMillis)
}
}
}
def recordWrite(pjp: ProceedingJoinPoint, sql: String, system: ActorSystem)(implicit statementRecorder: Option[GroupRecorder]): Any = {
withTimeSpent(pjp.proceedWithErrorHandler(sql, system)) { timeSpent ⇒
statementRecorder.map(stmr ⇒ stmr.writes.record(timeSpent))
}
}
}
object StatementInstrumentation {
val log = LoggerFactory.getLogger(classOf[StatementInstrumentation])
val SelectStatement = "(?i)^\\s*select.*?\\sfrom[\\s\\[]+([^\\]\\s,)(;]*).*".r
val InsertStatement = "(?i)^\\s*insert(?:\\s+ignore)?\\s+into\\s+([^\\s(,;]*).*".r
val UpdateStatement = "(?i)^\\s*update\\s+([^\\s,;]*).*".r
val DeleteStatement = "(?i)^\\s*delete\\s+from\\s+([^\\s,(;]*).*".r
val CommentPattern = "/\\*.*?\\*/" //for now only removes comments of kind / * anything * /
val Empty = ""
val Statements = "jdbc-statements"
implicit class PimpedProceedingJoinPoint(pjp: ProceedingJoinPoint) {
def proceedWithErrorHandler(sql: String, system: ActorSystem)(implicit statementRecorder: Option[GroupRecorder]): Any = {
try {
pjp.proceed()
} catch {
case NonFatal(cause) ⇒
Jdbc(system).processSqlError(sql, cause)
statementRecorder.map(stmr ⇒ stmr.errors.increment())
throw cause
}
}
}
}
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