1 files changed, 81 insertions, 0 deletions
diff --git a/dblib/common/src/main/java/org/apache/tomcat/jdbc/pool/ClassLoaderUtil.java b/dblib/common/src/main/java/org/apache/tomcat/jdbc/pool/ClassLoaderUtil.java
new file mode 100644
index 0000000..23b5668
--- /dev/null
+++ b/dblib/common/src/main/java/org/apache/tomcat/jdbc/pool/ClassLoaderUtil.java
@@ -0,0 +1,81 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * openecomp
+ * ================================================================================
+ * Copyright (C) 2016 - 2017 AT&T
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.tomcat.jdbc.pool;
+
+
+import org.apache.juli.logging.Log;
+import org.apache.juli.logging.LogFactory;
+
+public class ClassLoaderUtil {
+    private static final Log log = LogFactory.getLog(ClassLoaderUtil.class);
+
+    private static final boolean onlyAttemptFirstLoader =
+        Boolean.parseBoolean(System.getProperty("org.apache.tomcat.jdbc.pool.onlyAttemptCurrentClassLoader", "false"));
+
+    public static Class<?> loadClass(String className, ClassLoader... classLoaders) throws ClassNotFoundException {
+        ClassNotFoundException last = null;
+        StringBuilder errorMsg = null;
+        for (ClassLoader cl : classLoaders) {
+            try {
+                if (cl!=null) {
+                    if (log.isDebugEnabled()) {
+                        log.debug("Attempting to load class["+className+"] from "+cl);
+                    }
+                    return Class.forName(className, true, cl);
+                } else {
+                    throw new ClassNotFoundException("Classloader is null");
+                }
+            } catch (ClassNotFoundException x) {
+                last = x;
+                if (errorMsg==null) {
+                    errorMsg = new StringBuilder();
+                } else {
+                    errorMsg.append(';');
+                }
+                errorMsg.append("ClassLoader:");
+                errorMsg.append(cl);
+            }
+            if (onlyAttemptFirstLoader) {
+                break;
+            }
+        }
+        throw new ClassNotFoundException("Unable to load class: "+className+" from "+errorMsg, last);
+    }
+
+
+
+}