Merge pull request #8125 from eugenp/revert-8119-BAEL-3275-2

Revert "BAEL-3275: Using blocking queue for pub-sub"

logging-modules/logback/src/main/java/com/baeldung/logback/Example.java

@@ -0,0 +1,14 @@
+package com.baeldung.logback;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class Example {
+
+    private static final Logger logger = LoggerFactory.getLogger(Example.class);
+
+    public static void main(String[] args) {
+        logger.info("Example log from {}", Example.class.getSimpleName());
+    }
+
+}

logging-modules/logback/src/main/java/com/baeldung/logback/MapAppender.java

@@ -0,0 +1,39 @@
+package com.baeldung.logback;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.AppenderBase;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+
+public class MapAppender extends AppenderBase<ILoggingEvent> {
+
+    private final ConcurrentMap<String, ILoggingEvent> eventMap
+      = new ConcurrentHashMap<>();
+
+    private String prefix;
+
+    @Override
+    protected void append(final ILoggingEvent event) {
+        if (prefix == null || "".equals(prefix)) {
+            addError("Prefix is not set for MapAppender.");
+            return;
+        }
+
+        eventMap.put(prefix + System.currentTimeMillis(), event);
+    }
+
+    public String getPrefix() {
+        return prefix;
+    }
+
+    public void setPrefix(final String prefix) {
+        this.prefix = prefix;
+    }
+
+    public Map<String, ILoggingEvent> getEventMap() {
+        return eventMap;
+    }
+
+}