December 2016 - slf4j-dev - mailman3.qos.ch

LoggerFactory question help
by 雪松 29 Dec '16

29 Dec '16

question 1: Can somebody tell me when loggerFactoryClassLoader will be null? static Set<URL> findPossibleStaticLoggerBinderPathSet() { // use Set instead of list in order to deal with bug #138 // LinkedHashSet appropriate here because it preserves insertion order // during iteration Set<URL> staticLoggerBinderPathSet = new LinkedHashSet<URL>(); try { ClassLoader loggerFactoryClassLoader = LoggerFactory.class.getClassLoader(); Enumeration<URL> paths; if (loggerFactoryClassLoader == null) { paths = ClassLoader.getSystemResources(STATIC_LOGGER_BINDER_PATH); } else { paths = loggerFactoryClassLoader.getResources(STATIC_LOGGER_BINDER_PATH); } while (paths.hasMoreElements()) { URL path = paths.nextElement(); staticLoggerBinderPathSet.add(path); } } catch (IOException ioe) { Util.report("Error getting resources from path", ioe); } return staticLoggerBinderPathSet; } question 2: ClassLoader.getSystemResources(STATIC_LOGGER_BINDER_PATH) and loggerFactoryClassLoader.getResources(STATIC_LOGGER_BINDER_PATH) are the same meaning in jdk. public static Enumeration<URL> getSystemResources(String name) throws IOException { ClassLoader system = getSystemClassLoader(); if (system == null) { return getBootstrapResources(name); } return system.getResources(name); } public Enumeration<URL> getResources(String name) throws IOException { Enumeration[] tmp = new Enumeration[2]; if (parent != null) { tmp[0] = parent.getResources(name); } else { tmp[0] = getBootstrapResources(name); } tmp[1] = findResources(name); return new CompoundEnumeration<>(tmp); } thank for help.

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[JIRA] (SLF4J-386) Multiple Bindings Warning in Tomcat/JavaEE
by David Vincent (JIRA) 28 Dec '16

28 Dec '16

1 0

(no subject)
by 雪松 26 Dec '16

26 Dec '16

test

1 0

Lambda support in SLF4J
by Ceki Gülcü 24 Dec '16

24 Dec '16

Hello all, Given that JDK 7 earlier are used by over 50% of Java projects, I do not think we can force users to upgrade to Java 8. Thus, SLF4J is unlikely to bump its JDK requirement to version 8 for yet some time. On the bright side, there is a way for org.slf4j.Logger to support Java8 lambdas, or just lambdas, without requiring Java 8. As stated in [1], the compiler will treat any interface meeting the definition of a functional interface as a functional interface regardless of whether or not a @FunctionalInterface annotation is present on the interface declaration. This means that we can create a Supplier interface such as public interface Supplier<T> { T get(); } and then add the following method to org.slf4j.Logger interface. package org.slf4j; public interface Logger { .... public void debug(Supplier<T> supplier); .... } This will add lambda support without requiring Java 8 support at build time. The downside of this approach is that implementations of the org.slf4j.Logger interface as found in logback and modules such as slf4j-simple, slf4j-log412, slf4j-jdk14 will need to be updated. Given that the number of such implementations is limited, I think the requirement is quite acceptable. Your comments are welcome, -- Ceki Gülcü [1] https://docs.oracle.com/javase/8/docs/api/java/lang/FunctionalInterface.html

2 1

[JIRA] (SLF4J-385) add source links to javadocs
by Ceki Gulcu (JIRA) 22 Dec '16

22 Dec '16

1 0

[JIRA] (SLF4J-154) Copy & paste of LoggerFactory.getLogger
by Robert Thornton (JIRA) 17 Dec '16

17 Dec '16

1 0

[JIRA] (SLF4J-379) Marker lost in EventRecodingLogger
by Ceki Gulcu (JIRA) 15 Dec '16

15 Dec '16

1 0

[qos-ch/slf4j] 668833: fix SLF4J-379
by Ceki Gulcu 15 Dec '16

15 Dec '16

Branch: refs/heads/master Home: https://github.com/qos-ch/slf4j Commit: 66883348500a60ed26e5bf2289d0d26dce3d10bf https://github.com/qos-ch/slf4j/commit/66883348500a60ed26e5bf2289d0d26dce3d… Author: Ceki Gulcu <ceki(a)qos.ch> Date: 2016-12-15 (Thu, 15 Dec 2016) Changed paths: M slf4j-site/src/site/pages/news.html Log Message: ----------- fix SLF4J-379 Commit: fe664d8dd09b2a01c378b1a748aecbd4e61bad06 https://github.com/qos-ch/slf4j/commit/fe664d8dd09b2a01c378b1a748aecbd4e61b… Author: Ceki Gulcu <ceki(a)qos.ch> Date: 2016-12-15 (Thu, 15 Dec 2016) Changed paths: M slf4j-site/src/site/pages/news.html Log Message: ----------- added full name for Jonas Neukomm Compare: https://github.com/qos-ch/slf4j/compare/6de782333123...fe664d8dd09b

1 0

[JIRA] (SLF4J-379) Marker lost in EventRecodingLogger
by Jonas Neukomm (JIRA) 15 Dec '16

15 Dec '16

1 0

[JIRA] (SLF4J-379) Marker lost in EventRecodingLogger
by Ashvin Bhide (JIRA) 15 Dec '16

15 Dec '16

1 0