From e7bf71ea3a364d98979fbbca3727fbddaa44084b Mon Sep 17 00:00:00 2001
From: Bruce Eckel <BruceTEckel@gmail.com>
Date: Tue, 16 Aug 2016 21:43:15 -0600
Subject: [PATCH] SLF4J support

---
 build.gradle                 |  4 +--
 verifying/LoggingLevels.java | 62 ------------------------------------
 verifying/SLF4JLevels.java   | 23 +++++++++++++
 verifying/logback.xml        | 12 +++++++
 4 files changed, 37 insertions(+), 64 deletions(-)
 delete mode 100644 verifying/LoggingLevels.java
 create mode 100644 verifying/SLF4JLevels.java
 create mode 100644 verifying/logback.xml

diff --git a/build.gradle b/build.gradle
index 9bb41924..ceb919c4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -299,8 +299,8 @@ configure(subprojects - project(':onjava')) {
         compile project(':onjava')
         compile group: 'com.google.guava', name: 'guava', version: '19.0'
         compile "org.openjdk.jmh:jmh-core:${jmh.jmhVersion}"
-        compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.6.2'
-        compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.6.2'
+        //compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.6.2'
+        //compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.6.2'
     }
 }
 
diff --git a/verifying/LoggingLevels.java b/verifying/LoggingLevels.java
deleted file mode 100644
index ede87cbe..00000000
--- a/verifying/LoggingLevels.java
+++ /dev/null
@@ -1,62 +0,0 @@
-// verifying/LoggingLevels.java
-// (c)2016 MindView LLC: see Copyright.txt
-// We make no guarantees that this code is fit for any purpose.
-// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
-// {ErrorOutputExpected}
-import org.apache.logging.log4j.*;
-import org.apache.logging.log4j.spi.*;
-import org.apache.logging.log4j.core.config.Configurator;
-
-public class LoggingLevels {
-  private static Logger
-  lgr = LogManager.getLogger("com"),
-  lgr2 = LogManager.getLogger("com.mindviewinc"),
-  util= LogManager.getLogger("onjava"),
-  test= LogManager.getLogger("com.mindviewinc.test"),
-  rand = LogManager.getLogger("random");
-  private static void logMessages() {
-    lgr.info("com : info");
-    lgr2.info("com.mindviewinc : info");
-    util.info("util : info");
-    test.fatal("test : fatal");
-    rand.info("random : info");
-  }
-  public static void main(String[] args) {
-    Configurator.setLevel("com", Level.FATAL);
-    System.out.println("com level: FATAL");
-    logMessages();
-    Configurator.setLevel("onjava", Level.TRACE);
-    Configurator.setLevel("com.mindviewinc.test", Level.TRACE);
-    Configurator.setLevel("random", Level.TRACE);
-    System.out.println(
-        "individual loggers set to TRACE");
-    logMessages();
-    Configurator.setLevel("com", Level.FATAL);
-    System.out.println("com level: FATAL");
-    logMessages();
-  }
-}
-/* Output:
-com level: SEVERE
-individual loggers set to FINEST
-com level: SEVERE
-___[ Error Output ]___
-Jul 27, 2016 10:50:42 AM LoggingLevels logMessages
-INFO: util : info
-Jul 27, 2016 10:50:42 AM LoggingLevels logMessages
-SEVERE: test : severe
-Jul 27, 2016 10:50:42 AM LoggingLevels logMessages
-INFO: random : info
-Jul 27, 2016 10:50:42 AM LoggingLevels logMessages
-INFO: util : info
-Jul 27, 2016 10:50:42 AM LoggingLevels logMessages
-SEVERE: test : severe
-Jul 27, 2016 10:50:42 AM LoggingLevels logMessages
-INFO: random : info
-Jul 27, 2016 10:50:42 AM LoggingLevels logMessages
-INFO: util : info
-Jul 27, 2016 10:50:42 AM LoggingLevels logMessages
-SEVERE: test : severe
-Jul 27, 2016 10:50:42 AM LoggingLevels logMessages
-INFO: random : info
-*/
diff --git a/verifying/SLF4JLevels.java b/verifying/SLF4JLevels.java
new file mode 100644
index 00000000..3816ab06
--- /dev/null
+++ b/verifying/SLF4JLevels.java
@@ -0,0 +1,23 @@
+// verifying/SLF4JLevels.java
+// (c)2016 MindView LLC: see Copyright.txt
+// We make no guarantees that this code is fit for any purpose.
+// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
+import org.slf4j.*;
+
+public class SLF4JLevels {
+  private static final Logger logger =
+    LoggerFactory.getLogger(SLF4JLevels.class);
+  public static void main(String[] args) {
+    logger.trace("level: trace");
+    logger.debug("level: debug");
+    logger.info("level: info");
+    logger.warn("level: warn");
+    logger.error("level: error");
+  }
+}
+/* Output:
+20:09:34.499 [main] DEBUG SLF4JLevels - level: debug
+20:09:34.502 [main] INFO SLF4JLevels - level: info
+20:09:34.502 [main] WARN SLF4JLevels - level: warn
+20:09:34.502 [main] ERROR SLF4JLevels - level: error
+*/
diff --git a/verifying/logback.xml b/verifying/logback.xml
new file mode 100644
index 00000000..6b18546d
--- /dev/null
+++ b/verifying/logback.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>%d{yyyy-MM-dd'T'HH:mm:ss.SSS} [%thread] %-5level %logger - %msg%n
+      </pattern>
+    </encoder>
+  </appender>
+  <root level="TRACE">
+    <appender-ref ref="STDOUT" />
+  </root>
+</configuration>
\ No newline at end of file