Added file appender and defined threshold for various appenders

broker/src/main/resources/log4j.properties

@@ -1,6 +1,6 @@
 # Set root logger level to DEBUG and its only appender to A1.
 #log4j.rootLogger=ERROR, A1
-log4j.rootLogger=ERROR, A1
+log4j.rootLogger=ERROR, stdout, file
 #log4j.rootLogger=WARN, A1
 #log4j.logger.org.dna.mqtt.moquette.client=WARN
 #log4j.logger.org.mina=WARN
@@ -9,13 +9,21 @@ log4j.rootLogger=ERROR, A1
 #log4j.logger.org.dna.mqtt.moquette.proto.MQTTLoggingFilter=DEBUG
 #log4j.logger.org.dna.mqtt.moquette.proto.PublishDecoder=DEBUG
 
-log4j.logger.org.dna.mqtt=WARN
+log4j.logger.org.dna.mqtt=INFO
 log4j.logger.org.dna.mqtt.moquette.server.ServerIntegrationFuseTest=DEBUG
-log4j.logger.org.dna.mqtt.moquette.messaging.spi.impl.ProtocolProcessor=WARN
+log4j.logger.org.dna.mqtt.moquette.messaging.spi.impl.ProtocolProcessor=INFO
 
-# A1 is set to be a ConsoleAppender.
-log4j.appender.A1=org.apache.log4j.ConsoleAppender
+# stdout appender is set to be a ConsoleAppender.
+log4j.appender.stdout=org.apache.log4j.ConsoleAppender
+log4j.appender.stdout.Threshold=WARN
+log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
+log4j.appender.stdout.layout.ConversionPattern=%-4r [%t] %-5p %c{1} %x - %m%n
 
-# A1 uses PatternLayout.
-log4j.appender.A1.layout=org.apache.log4j.PatternLayout
-log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c{1} %x - %m%n
+#file appender
+log4j.appender.file=org.apache.log4j.RollingFileAppender
+log4j.appender.file.Threshold=INFO
+log4j.appender.file.File=moquette.log
+log4j.appender.file.MaxFileSize=1MB
+log4j.appender.file.MaxBackupIndex=1
+log4j.appender.file.layout=org.apache.log4j.PatternLayout
+log4j.appender.file.layout.ConversionPattern=%-4r [%t] %-5p %c{1} %x - %m%n