commit 1fbf3d3ece076ca041ae99e84dedbc97bdaf7600

Author: Luke Lu <llu@yahoo-inc.com>
Date:   Tue Jul 27 15:50:42 2010 -0700

     Fix unit test failure caused by an example config file.
    
    The last minute added file was causing MetricsConfig.testMissingFiles to fail.
    Also add back a util class that's need for Simon and Ganglia.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20-security-patches@1077605 13f79535-47bb-0310-9956-ffa450edef68

src/core/org/apache/hadoop/metrics2/util/Servers.java

@@ -0,0 +1,68 @@
+/*
+ * Util.java
+ *
+ * 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.metrics2.util;
+
+import java.net.InetSocketAddress;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Helpers to handle server addresses
+ */
+public class Servers {
+
+  /**
+   * This class is not intended to be instantiated
+   */
+  private Servers() {}
+
+  /**
+   * Parses a space and/or comma separated sequence of server specifications
+   * of the form <i>hostname</i> or <i>hostname:port</i>.  If
+   * the specs string is null, defaults to localhost:defaultPort.
+   *
+   * @param specs   server specs (see description)
+   * @param defaultPort the default port if not specified
+   * @return a list of InetSocketAddress objects.
+   */
+  public static List<InetSocketAddress> parse(String specs, int defaultPort) {
+    List<InetSocketAddress> result = new ArrayList<InetSocketAddress>(1);
+    if (specs == null) {
+      result.add(new InetSocketAddress("localhost", defaultPort));
+    }
+    else {
+      String[] specStrings = specs.split("[ ,]+");
+      for (String specString : specStrings) {
+        int colon = specString.indexOf(':');
+        if (colon < 0 || colon == specString.length() - 1) {
+          result.add(new InetSocketAddress(specString, defaultPort));
+        } else {
+          String hostname = specString.substring(0, colon);
+          int port = Integer.parseInt(specString.substring(colon+1));
+          result.add(new InetSocketAddress(hostname, port));
+        }
+      }
+    }
+    return result;
+  }
+
+}