Integration of TOS: Add lazy reload interface to common.

hadoop-cloud-storage-project/hadoop-tos/src/main/java/org/apache/hadoop/fs/tosfs/common/CommonUtils.java

@@ -0,0 +1,44 @@
+/*
+ * 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.hadoop.fs.tosfs.common;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class CommonUtils {
+  private static final Logger LOG = LoggerFactory.getLogger(CommonUtils.class);
+
+  public static void runQuietly(RunWithException run) {
+    runQuietly(run, true);
+  }
+
+  public static void runQuietly(RunWithException run, boolean logError) {
+    try {
+      run.run();
+    } catch (Exception e) {
+      if (logError) {
+        LOG.info("Encounter error but can be ignored: ", e);
+      }
+    }
+  }
+
+  public interface RunWithException {
+    void run() throws Exception;
+  }
+}