Packages

  • package root
    Definition Classes
    root
  • package csw
    Definition Classes
    root
  • package logging
    Definition Classes
    csw
  • package client

    This is a Actor based logging library which supports writing logs to File and StdOut Console.

    Logging Service

    This is a Actor based logging library which supports writing logs to File and StdOut Console.

    Features
    • Supports component specific log levels, ex. HCD1 can choose to log at info level and HCD2 can choose to log at debug level
    • Supports dynamically changing component log levels
    • Asynchronous thread safe logging
    • Structured logging
    • Supports overriding default logging properties per component viz
    • Intercepting logs from akka/slf4j
    • Supports JSON logging
    LogActor

    LogActor is the heart of logging library. It receives messages from following classes:

    • Slf4jAppender: Intercepts Slf4j logs and forwards it to LogActor via MessageHandler
    • AkkaLogger: Intercepts Akka logs and forwards it to LogActor via MessageHandler.
    • LoggerImpl: Provides csw logging API for component writer to log messages which gets forwarded to LogActor via MessageHandler
    Logging Appenders

    This library supports two types of csw.logging.client.appenders.LogAppender:

    You can specify the appender in application.conf file as shown below:

    csw-logging {
   appenders = ["csw.logging.client.appenders.StdOutAppender$", "csw.logging.client.appenders.FileAppender$"]
 }
    Component Specific Log Levels

    For each component, ComponentLoggingState instance gets created which maintains log levels which are enabled and disabled for this particular component. Every time message gets logged by component, LoggerImpl checks in corresponding componentLoggingState whether current log level enabled or not. If enabled, then only log message gets forwarded to LogActor via MessageHandler.

    You can specify the component specific log levels in application.conf file as shown below:

    component-log-levels {
   tromboneHcd = debug
   tromboneAssembly = error
}

    ̄ Detailed documentation of Logging Service is available at: https://tmtsoftware.github.io/csw/services/logging.html

    Definition Classes
    logging
  • package appenders
    Definition Classes
    client
  • FileAppender
  • LogAppender
  • LogAppenderBuilder
  • StdOutAppender

trait LogAppender extends AnyRef

Trait for log appender classes.

Linear Supertypes
AnyRef, Any
Known Subclasses
FileAppender, StdOutAppender
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  1. LogAppender
  2. AnyRef
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Abstract Value Members

  1. abstract def append(baseMsg: JsObject, category: String): Unit

    Appends a new log message

    Appends a new log message

    baseMsg

    the message to be logged

    category

    the kinds of log (for example, "common")

  2. abstract def finish(): Future[Unit]

    Called just before the logger shuts down

    Called just before the logger shuts down

    returns

    a future that is completed when finished

  3. abstract def stop(): Future[Unit]

    Stops a log appender

    Stops a log appender

    returns

    a future that is completed when stopped

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  1. final def !=(arg0: Any): Boolean
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  18. final def wait(): Unit
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  1. def finalize(): Unit
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    Deprecated

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