Created DebugUtils

src/main/java/net/minestom/server/entity/Entity.java

@@ -489,6 +489,7 @@ public abstract class Entity implements Viewable, EventHandler, DataContainer {
             }
 
             // handle block contacts
+            // TODO do not call every tick (it is pretty expensive)
             final int minX = (int) Math.floor(boundingBox.getMinX());
             final int maxX = (int) Math.ceil(boundingBox.getMaxX());
             final int minY = (int) Math.floor(boundingBox.getMinY());

src/main/java/net/minestom/server/utils/debug/DebugUtils.java

@@ -0,0 +1,52 @@
+package net.minestom.server.utils.debug;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Utils class useful for debugging purpose.
+ */
+public final class DebugUtils {
+
+    public final static Logger LOGGER = LoggerFactory.getLogger(DebugUtils.class);
+
+    private static final String LINE_SEPARATOR = System.getProperty("line.separator");
+    private static final int OFFSET = 2; // Used to do not show DebugUtils in the stack trace
+
+    /**
+     * Prints the current thread stack trace elements.
+     *
+     * @param maxLine the maximum number of stack trace element
+     */
+    public static synchronized void printStackTrace(int maxLine) {
+        maxLine += OFFSET;
+        StackTraceElement[] elements = Thread.currentThread().getStackTrace();
+
+        StringBuilder stringBuilder = new StringBuilder();
+
+        stringBuilder.append("START STACKTRACE");
+        stringBuilder.append(LINE_SEPARATOR);
+
+        for (int i = OFFSET; i < maxLine; i++) {
+            if (i >= elements.length)
+                break;
+
+            final StackTraceElement element = elements[i];
+            final String line = element.getClassName() + "." + element.getMethodName() + " (line:" + element.getLineNumber() + ")";
+            stringBuilder.append(line);
+            stringBuilder.append(LINE_SEPARATOR);
+        }
+
+        stringBuilder.append("END STACKTRACE");
+
+        LOGGER.info(stringBuilder.toString());
+    }
+
+    /**
+     * Prints the current thread stack trace elements.
+     */
+    public static synchronized void printStackTrace() {
+        printStackTrace(Integer.MAX_VALUE);
+    }
+
+}