Package org.refcodes.logger.alt.async

Class AsyncLoggerImpl<T>

java.lang.Object

org.refcodes.logger.alt.async.AsyncLoggerImpl<T>

Type Parameters:

T - The type of the Record instances managed by the Logger.

All Implemented Interfaces:

org.refcodes.component.Destroyable, org.refcodes.logger.Logger<T>, org.refcodes.logger.LoggerAccessor.LoggerMutator<org.refcodes.logger.Logger<T>>

public class AsyncLoggerImpl<T>
extends Object
implements org.refcodes.logger.Logger<T>, org.refcodes.component.Destroyable, org.refcodes.logger.LoggerAccessor.LoggerMutator<org.refcodes.logger.Logger<T>>

The AsyncLoggerImpl uses the asynchronous patter to forward Logger functionality to an encapsulated Logger instance.

Internally a log line queue (holding Record instances to be logged) as well a daemon thread (taking elements from the log line queue) are used to decouple the encapsulated Logger instance from the asynchronous AsyncLoggerImpl.

A given number of retries are approached in case there is an overflow of the log line queue; this happens when the queue is full the encapsulated Logger instance cannot take the next Record in time.

To avoid a building up of the log line queue, eventually causing an out of memory, log lines not being taken into the log line queue within the given number of retries, them log lines are dismissed. In such a case a warning with a LogPriority.WARN is printed out.

TODO: Provide configuration parameters (additional constructors) for not dismissing any log lines with the risk of a memory overflow.

Nested Class Summary

Nested classes/interfaces inherited from interface org.refcodes.component.Destroyable

org.refcodes.component.Destroyable.DestroyAutomaton

Constructor Summary

Constructors

Constructor	Description
AsyncLoggerImpl()	Instantiates a new async logger impl.
AsyncLoggerImpl(ExecutorService aExecutorService, org.refcodes.logger.Logger<T> aLogger)	Constructs an AsyncLoggerImpl from the provided Logger instance.
AsyncLoggerImpl(org.refcodes.logger.Logger<T> aLogger)	Constructs an asynchronous Logger (AsyncLoggerImpl) from the provided Logger instance.

Method Summary

Modifier and Type	Method	Description
void	destroy()
void	log(org.refcodes.tabular.Record<? extends T> aRecord)
void	setLogger(org.refcodes.logger.Logger<T> aLogger)

Methods inherited from interface org.refcodes.logger.Logger

printSeparator

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AsyncLoggerImpl

public AsyncLoggerImpl()

Instantiates a new async logger impl.

AsyncLoggerImpl

public AsyncLoggerImpl(org.refcodes.logger.Logger<T> aLogger)

Constructs an asynchronous Logger (AsyncLoggerImpl) from the provided Logger instance.

Parameters:

aLogger - The a logger which is to be enriched with asynchronous functionality.

AsyncLoggerImpl

public AsyncLoggerImpl(ExecutorService aExecutorService,
                       org.refcodes.logger.Logger<T> aLogger)

Constructs an AsyncLoggerImpl from the provided Logger instance.

Parameters:

aExecutorService - The ExecutorService to use when creating threads.

aLogger - The Logger instances to be used for the AsyncLoggerImpl.

Method Detail

log

public void log(org.refcodes.tabular.Record<? extends T> aRecord)
         throws org.refcodes.logger.IllegalRecordRuntimeException,
                org.refcodes.logger.UnexpectedLogRuntimeException

Specified by:

log in interface org.refcodes.logger.Logger<T>

Throws:

org.refcodes.logger.IllegalRecordRuntimeException

org.refcodes.logger.UnexpectedLogRuntimeException

destroy

public void destroy()

Specified by:

destroy in interface org.refcodes.component.Destroyable

setLogger

public void setLogger(org.refcodes.logger.Logger<T> aLogger)

Specified by:

setLogger in interface org.refcodes.logger.LoggerAccessor.LoggerMutator<T>