Merge pull request #1000: [core] add ExceptionUtils.ignoring

Author: je-ik

core/src/main/java/cz/o2/proxima/core/util/ExceptionUtils.java

@@ -19,8 +19,10 @@
 import cz.o2.proxima.core.functional.Consumer;
 import cz.o2.proxima.core.functional.UnaryFunction;
 import java.io.Serializable;
+import lombok.extern.slf4j.Slf4j;
 
 /** Utilities related to exception throwing and handling. */
+@Slf4j
 public class ExceptionUtils {
 
   /**
@@ -184,5 +186,14 @@ public static void rethrowAsIllegalStateException(Throwable cause) {
     throw new IllegalStateException(cause);
   }
 
+  /** Swallow any Exception. */
+  public static void ignoring(ThrowingRunnable runnable) {
+    try {
+      runnable.run();
+    } catch (Exception ex) {
+      log.warn("Caught error, ignoring as instructed.", ex);
+    }
+  }
+
   private ExceptionUtils() {}
 }

core/src/test/java/cz/o2/proxima/core/util/ExceptionUtilsTest.java

@@ -69,4 +69,13 @@ public void testRethrowIllegalStateException() {
       assertEquals("ex", ex.getCause().getMessage());
     }
   }
+
+  @Test
+  public void testIgnoring() {
+    ExceptionUtils.ignoring(
+        () -> {
+          throw new IllegalStateException("ex");
+        });
+    assertTrue(true);
+  }
 }