LoggerFactory emits 'SLF4J(I): Connected with provider of type'

Signed-off-by: Ceki Gulcu <ceki@qos.ch>
qos-ch · Aug 5, 2024 · 4281010 · 4281010
1 parent 982e4b0
commit 4281010
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Showing 8 changed files with 63 additions and 42 deletions.
diff --git a/integration/src/test/java/org/slf4j/CompatibilityAssertionTest.java b/integration/src/test/java/org/slf4j/CompatibilityAssertionTest.java
@@ -56,9 +56,13 @@ public void test() throws Exception {
         Logger logger = LoggerFactory.getLogger(this.getClass());
         String msg = "hello world " + diff;
         logger.info(msg);
-        assertEquals(1, sps.stringList.size());
+        assertEquals(2, sps.stringList.size());
+
         String s0 = (String) sps.stringList.get(0);
-        assertTrue(s0.contains(msg));
+        assertTrue(s0.startsWith("SLF4J(I): Connected with provider of type [org.slf4j.simple.SimpleServiceProvider]"));
+
+        String s1 = (String) sps.stringList.get(1);
+        assertTrue(s1.contains(msg));
 
     }
 }
diff --git a/integration/src/test/java/org/slf4j/MultiBindingAssertionTest.java b/integration/src/test/java/org/slf4j/MultiBindingAssertionTest.java
@@ -59,7 +59,7 @@ public void test() throws Exception {
         assertMsgContains(list, 1, "Found provider");
         assertMsgContains(list, 2, "Found provider");
         assertMsgContains(list, 3, "See https://www.slf4j.org/codes.html#multiple_bindings for an explanation.");
-        assertMsgContains(list, 4, "Actual provider is of type [");
+        assertMsgContains(list, 4, "SLF4J(I): Connected with provider of type [");
     }
 
     void assertMsgContains(List<String> strList, int index, String msg) {

diff --git a/slf4j-api/src/main/java/org/slf4j/LoggerFactory.java b/slf4j-api/src/main/java/org/slf4j/LoggerFactory.java
@@ -82,6 +82,9 @@ public final class LoggerFactory {
     static final String UNSUCCESSFUL_INIT_URL = CODES_PREFIX + "#unsuccessfulInit";
     static final String UNSUCCESSFUL_INIT_MSG = "org.slf4j.LoggerFactory in failed state. Original exception was thrown EARLIER. See also "
                     + UNSUCCESSFUL_INIT_URL;
+
+    static final String CONNECTED_WITH_MSG = "Connected with provider of type [";
+
     /**
      * System property for explicitly setting the provider class. If set and the provider could be instantiated,
      * then the service loading mechanism will be bypassed.
@@ -403,9 +406,9 @@ private static void reportMultipleBindingAmbiguity(List<SLF4JServiceProvider> pr
     }
 
     private static void reportActualBinding(List<SLF4JServiceProvider> providerList) {
-        // binderPathSet can be null under Android
-        if (!providerList.isEmpty() && isAmbiguousProviderList(providerList)) {
-            Reporter.info("Actual provider is of type [" + providerList.get(0) + "]");
+        if (!providerList.isEmpty()) {
+            SLF4JServiceProvider provider = providerList.get(0);
+            Reporter.info(CONNECTED_WITH_MSG + provider.getClass().getName() + "]");
         }
     }
 

diff --git a/slf4j-api/src/test/java/org/slf4j/testHarness/MultithreadedInitializationTest.java b/slf4j-api/src/test/java/org/slf4j/testHarness/MultithreadedInitializationTest.java
@@ -40,11 +40,11 @@ public void multiThreadedInitialization() throws InterruptedException, BrokenBar
 
         long expectedEventCount = eventCount.get() + extraLogEvents();
 
-        assertTrue(expectedEventCount + " >= " + recordedEventCount, expectedEventCount >= recordedEventCount);
+        assertTrue("unmet condition: " + expectedEventCount + " >= " + recordedEventCount, expectedEventCount >= recordedEventCount);
         assertTrue("unmet condition: " + expectedEventCount + " < " + recordedEventCount + "+" + LENIENCY_COUNT, expectedEventCount < (recordedEventCount + LENIENCY_COUNT));   }
 
     abstract protected long getRecordedEventCount();
-
+    
     protected int extraLogEvents() {
         return 0;
     }

diff --git a/...m-logging/src/test/java/org/slf4j/jdk/platform/logging/test/SLF4JPlatformLoggingTest.java b/...m-logging/src/test/java/org/slf4j/jdk/platform/logging/test/SLF4JPlatformLoggingTest.java
@@ -39,6 +39,7 @@
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;
+import org.slf4j.LoggerFactory;
 
 /**
  * The present test is fragile in the sense that it sets up SimpleLogger
@@ -108,11 +109,12 @@ public void throwTest() throws IOException {
         //INFO throwTest - a problem
         //java.lang.Exception
         //        at org.slf4j.jdk.platform.logging/org.slf4j.jdk.platform.logging.SLF4JPlatformLoggingTest.throwTest(SLF4JPlatformLoggingTest.java:92)
-
-        assertEquals("INFO throwTest - we have a problem", results.get(0));
-        assertEquals(Exception.class.getName(), results.get(1));
-        assertTrue(results.get(2).contains("at "));
-        assertTrue(results.get(2).contains(this.getClass().getName()));
+
+        assertTrue(results.get(0).startsWith("SLF4J(I): Connected with provider of type ["));
+        assertEquals("INFO throwTest - we have a problem", results.get(1));
+        assertEquals(Exception.class.getName(), results.get(2));
+        assertTrue(results.get(3).contains("at "));
+        assertTrue(results.get(3).contains(this.getClass().getName()));
     }
 
 

diff --git a/slf4j-nop/pom.xml b/slf4j-nop/pom.xml
@@ -29,6 +29,14 @@
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
     </dependency>
+
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+      <type>test-jar</type>
+      <version>${project.version}</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
 </project>
diff --git a/slf4j-nop/src/test/java/org/slf4j/nop/MultithreadedInitializationTest.java b/slf4j-nop/src/test/java/org/slf4j/nop/MultithreadedInitializationTest.java
@@ -40,9 +40,11 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.slf4j.LoggerFactoryFriend;
+import org.slf4j.helpers.StringPrintStream;
 
 public class MultithreadedInitializationTest {
 
+    static int NUM_LINES_IN_SLF4J_CONNECTED_WITH_PROVIDER_INFO = 1;
     final static int THREAD_COUNT = 4 + Runtime.getRuntime().availableProcessors() * 2;
 
     private static final AtomicLong EVENT_COUNT = new AtomicLong(0);
@@ -52,7 +54,7 @@ public class MultithreadedInitializationTest {
     int diff = new Random().nextInt(10000);
     String loggerName = "org.slf4j.impl.MultithreadedInitializationTest";
     private final PrintStream oldErr = System.err;
-    StringPrintStream sps = new StringPrintStream(oldErr);
+    StringPrintStream sps = new StringPrintStream(oldErr, false);
 
     @Before
     public void setup() {
@@ -80,7 +82,7 @@ public void multiThreadedInitialization() throws InterruptedException, BrokenBar
         logger.info("hello");
         EVENT_COUNT.getAndIncrement();
 
-        assertEquals(0, sps.stringList.size());
+        assertEquals(NUM_LINES_IN_SLF4J_CONNECTED_WITH_PROVIDER_INFO, sps.stringList.size());
     }
 
     private static LoggerAccessingThread[] harness() throws InterruptedException, BrokenBarrierException {
@@ -120,31 +122,31 @@ public void run() {
         }
     };
 
-    public static class StringPrintStream extends PrintStream {
-
-        public static final String LINE_SEP = System.getProperty("line.separator");
-        PrintStream other;
-        List<String> stringList = new ArrayList<>();
-
-        public StringPrintStream(PrintStream ps) {
-            super(ps);
-            other = ps;
-        }
-
-        public void print(String s) {
-            other.print(s);
-            stringList.add(s);
-        }
-
-        public void println(String s) {
-            other.println(s);
-            stringList.add(s);
-        }
-
-        public void println(Object o) {
-            other.println(o);
-            stringList.add(o.toString());
-        }
-    };
+//    public static class StringPrintStream extends PrintStream {
+//
+//        public static final String LINE_SEP = System.getProperty("line.separator");
+//        PrintStream other;
+//        List<String> stringList = new ArrayList<>();
+//
+//        public StringPrintStream(PrintStream ps) {
+//            super(ps);
+//            other = ps;
+//        }
+//
+//        public void print(String s) {
+//            other.print(s);
+//            stringList.add(s);
+//        }
+//
+//        public void println(String s) {
+//            other.println(s);
+//            stringList.add(s);
+//        }
+//
+//        public void println(Object o) {
+//            other.println(o);
+//            stringList.add(o.toString());
+//        }
+//    };
 
 }
diff --git a/slf4j-simple/src/test/java/org/slf4j/simple/SimpleLoggerMultithreadedInitializationTest.java b/slf4j-simple/src/test/java/org/slf4j/simple/SimpleLoggerMultithreadedInitializationTest.java
@@ -41,6 +41,8 @@ public class SimpleLoggerMultithreadedInitializationTest extends MultithreadedIn
     //
     // final int diff = new Random().nextInt(10000);
     static int NUM_LINES_IN_SLF4J_REPLAY_WARNING = 3;
+    static int NUM_LINES_IN_SLF4J_CONNECTED_WITH_PROVIDER_INFO = 1;
+
     private final PrintStream oldErr = System.err;
     final String loggerName = this.getClass().getName();
     StringPrintStream sps = new StringPrintStream(oldErr, false);
@@ -67,7 +69,7 @@ protected long getRecordedEventCount() {
 
     @Override
     protected int extraLogEvents() {
-        return NUM_LINES_IN_SLF4J_REPLAY_WARNING;
+        return NUM_LINES_IN_SLF4J_REPLAY_WARNING + NUM_LINES_IN_SLF4J_CONNECTED_WITH_PROVIDER_INFO;
     }
 
 }