Add ExceptionUtils to vespajlib

2 files changed, 48 insertions, 0 deletions

diff --git a/vespajlib/src/main/java/com/yahoo/exception/ExceptionUtils.java b/vespajlib/src/main/java/com/yahoo/exception/ExceptionUtils.java
new file mode 100644
index 00000000000..4d4a2d02a1a
--- /dev/null
+++ b/vespajlib/src/main/java/com/yahoo/exception/ExceptionUtils.java
@@ -0,0 +1,40 @@
+// Copyright 2020 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.exception;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.io.UncheckedIOException;
+
+/**
+ * Misc exception utility methods - replacement for Apache commons-lang's ExceptionUtils
+ *
+ * @author bjorncs
+ */
+public class ExceptionUtils {
+
+    private ExceptionUtils() {}
+
+    public static String getStackTraceAsString(Throwable throwable) {
+        try (StringWriter stringWriter = new StringWriter();
+             PrintWriter printWriter = new PrintWriter(stringWriter, true)) {
+            throwable.printStackTrace(printWriter);
+            return stringWriter.getBuffer().toString();
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    public static String getStackTraceRecursivelyAsString(Throwable throwable) {
+        Throwable cause = throwable;
+        try (StringWriter stringWriter = new StringWriter();
+             PrintWriter printWriter = new PrintWriter(stringWriter, true)) {
+            do {
+                cause.printStackTrace(printWriter);
+            } while ((cause = cause.getCause()) != null);
+            return stringWriter.getBuffer().toString();
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+}
diff --git a/vespajlib/src/main/java/com/yahoo/exception/package-info.java b/vespajlib/src/main/java/com/yahoo/exception/package-info.java
new file mode 100644
index 00000000000..8254f90651f
--- /dev/null
+++ b/vespajlib/src/main/java/com/yahoo/exception/package-info.java
@@ -0,0 +1,8 @@
+// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+/**
+ * @author bjorncs
+ */
+@ExportPackage
+package com.yahoo.exception;
+
+import com.yahoo.osgi.annotation.ExportPackage;
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