How can I configure Logback SMTP appender on groovy? - groovy

Question

I am trying to configure Logback SMTP appender using Groovy for my standalone Java application. My logback.groovy file content is below:
import ch.qos.logback.classic.PatternLayout
import ch.qos.logback.classic.encoder.PatternLayoutEncoder
import ch.qos.logback.classic.net.SMTPAppender
import ch.qos.logback.core.ConsoleAppender
import static ch.qos.logback.classic.Level.INFO
def common_log_date_format = "{MM/dd HH:mm:ss:SSS}"
def common_log_conversionpattern = "[%d${common_log_date_format}] [%t] [%c{0}] [%p]: %m%n"
appender("STDOUT", ConsoleAppender) {
encoder(PatternLayoutEncoder) {
pattern = "${common_log_conversionpattern}"
}
}
appender("EMAIL", SMTPAppender) {
smtpHost = "xxxx"
to = "yyyy"
from = "zzzz"
subject = "[${app.name}] [%marker] [%p]"
asynchronousSending = false
layout(PatternLayout) {
pattern = "${common_log_conversionpattern}"
}
}
root(INFO, ["STDOUT", "EMAIL"])
But this config does not work, it fails during app startup with:
Failed to instantiate [ch.qos.logback.classic.LoggerContext]
Reported exception:
java.lang.NullPointerException: Cannot get property 'name' on null object
at org.codehaus.groovy.runtime.NullObject.getProperty(NullObject.java:56)
at org.codehaus.groovy.runtime.InvokerHelper.getProperty(InvokerHelper.java:168)
at org.codehaus.groovy.runtime.callsite.NullCallSite.getProperty(NullCallSite.java:44)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:227)
at Script1$_run_closure2.doCall(Script1.groovy:22)
at Script1$_run_closure2.doCall(Script1.groovy)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:272)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:909)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:39)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:54)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112)
at ch.qos.logback.classic.gaffer.ConfigurationDelegate.appender(ConfigurationDelegate.groovy:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at org.codehaus.groovy.runtime.metaclass.MixinInstanceMetaMethod.invoke(MixinInstanceMetaMethod.java:53)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoMetaMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:313)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:49)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:149)
at Script1.run(Script1.groovy:18)
at Script1$run.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112)
at ch.qos.logback.classic.gaffer.GafferConfigurator.run(GafferConfigurator.groovy:64)
at ch.qos.logback.classic.gaffer.GafferConfigurator$run.callCurrent(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:49)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:141)
at ch.qos.logback.classic.gaffer.GafferConfigurator.run(GafferConfigurator.groovy:40)
at ch.qos.logback.classic.gaffer.GafferUtil.runGafferConfiguratorOn(GafferUtil.java:43)
at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:65)
at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:148)
at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:85)
at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:55)
at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128)
at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:107)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:295)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:269)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:281)
at com.revere.edm.job.Loader.<init>(Loader.java:13)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at java.lang.Class.newInstance(Class.java:374)
at com.revere.shell.Shell.execute(Shell.java:233)
at com.revere.shell.Shell.main(Shell.java:64)
I cannot understand the reason of this message. If I remove SMTP Appender configuration part from config - application works and logs fine.
How can I make SMTP appende work with groovy configuration?
My environment is: Ubuntu 12.04, logback classic/core 1.0.13, Groovy-all jar version 2.2.0-rc-3, Janino 2.6.1, javax.mail 1.4.

Answer 1

This is my solution for groovy & grails 3.2.0 appender with smtp gmail, for testing and production environment:
import grails.util.BuildSettings
import grails.util.Environment
import ch.qos.logback.classic.html.HTMLLayout
import ch.qos.logback.classic.encoder.PatternLayoutEncoder
import ch.qos.logback.classic.net.SMTPAppender
import ch.qos.logback.core.ConsoleAppender
// See http://logback.qos.ch/manual/groovy.html for details on configuration
appender('STDOUT', ConsoleAppender) {
encoder(PatternLayoutEncoder) {
pattern = "%level %logger - %msg%n"
}
}
appender("EMAIL", SMTPAppender) {
smtpHost = "smtp.gmail.com"
smtpPort = 587
STARTTLS = true
username = "email#gmail.com"
password = "password"
to = "emailRecepter#domain.com"
from = "email#gmail.com"
subject = "Logback Sam error"
asynchronousSending = false
layout(HTMLLayout) {
pattern = "%level %logger - %msg%n"
}
println "Setting EMAIL property"
}
def targetDir = BuildSettings.TARGET_DIR
if (Environment.isDevelopmentMode() && targetDir != null) {
appender("FULL_STACKTRACE", FileAppender) {
file = "${targetDir}/stacktrace.log"
append = true
encoder(PatternLayoutEncoder) {
pattern = "%level %logger - %msg%n"
}
}
logger("StackTrace", ERROR, ['FULL_STACKTRACE'], false)
root(ERROR, ['STDOUT', 'FULL_STACKTRACE'])
}
else {
root(ERROR, ['STDOUT','EMAIL'])
}

Answer 2

Ok, I found my mistake. app.name was a property from included config which didn`t incude after updating config to groovy. Question solved.