| /** |
| * 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.contrib.failmon; |
| |
| import java.net.InetAddress; |
| import java.util.ArrayList; |
| import java.util.Calendar; |
| import java.util.Collections; |
| import java.util.HashMap; |
| |
| /********************************************************** |
| * Objects of this class represent metrics collected for |
| * a specific hardware source. Each EventRecord contains a HashMap of |
| * (key, value) pairs, each of which represents a property of |
| * the metered value. For instance, when parsing a log file, an |
| * EventRecord is created for each log entry, which contains |
| * the hostname and the ip addresses of the node, timestamp of |
| * the log entry, the actual message etc. Each and every EventRecord |
| * contains the hostname of the machine on which it was collected, |
| * its IP address and the time of collection. |
| * |
| * The main purpose of this class is to provide a uniform format |
| * for records collected from various system compontents (logs, |
| * ifconfig, smartmontools, lm-sensors etc). All metric values are |
| * converted into this format after they are collected by a |
| * Monitored object. |
| * |
| **********************************************************/ |
| |
| public class EventRecord { |
| |
| HashMap<String, Object> fields; |
| |
| /** |
| * Create the EventRecord given the most common properties |
| * among different metric types. |
| */ |
| public EventRecord(String _hostname, Object [] _ips, Calendar _timestamp, |
| String _type, String _logLevel, String _source, String _message) { |
| fields = new HashMap<String, Object>(); |
| fields.clear(); |
| set("hostname", _hostname); |
| set("ips", _ips); |
| set("timestamp", _timestamp); |
| set("type", _type); |
| set("logLevel", _logLevel); |
| set("source", _source); |
| set("message", _message); |
| } |
| |
| /** |
| * Create the EventRecord with no fields other than "invalid" as |
| * the hostname. This is only used as a dummy. |
| */ |
| public EventRecord() { |
| // creates an invalid record |
| fields = new HashMap<String, Object>(); |
| fields.clear(); |
| set("hostname", "invalid"); |
| } |
| |
| /** |
| * Return the HashMap of properties of the EventRecord. |
| * |
| * @return a HashMap that contains all properties of the record. |
| */ |
| public final HashMap<String, Object> getMap() { |
| return fields; |
| } |
| |
| /** |
| * Set the value of a property of the EventRecord. |
| * |
| * @param fieldName the name of the property to set |
| * @param fieldValue the value of the property to set |
| * |
| */ |
| public void set(String fieldName, Object fieldValue) { |
| if (fieldValue != null) |
| fields.put(fieldName, fieldValue); |
| } |
| |
| /** |
| * Get the value of a property of the EventRecord. |
| * If the property with the specific key is not found, |
| * null is returned. |
| * |
| * @param fieldName the name of the property to get. |
| */ |
| public Object get(String fieldName) { |
| return fields.get(fieldName); |
| } |
| |
| /** |
| * Check if the EventRecord is a valid one, i.e., whether |
| * it represents meaningful metric values. |
| * |
| * @return true if the EventRecord is a valid one, false otherwise. |
| */ |
| public boolean isValid() { |
| return !("invalid".equalsIgnoreCase((String) fields.get("hostname"))); |
| } |
| |
| /** |
| * Creates and returns a string representation of the object. |
| * |
| * @return a String representation of the object |
| */ |
| |
| public String toString() { |
| String retval = ""; |
| ArrayList<String> keys = new ArrayList<String>(fields.keySet()); |
| Collections.sort(keys); |
| |
| for (int i = 0; i < keys.size(); i++) { |
| Object value = fields.get(keys.get(i)); |
| if (value == null) |
| retval += keys.get(i) + ":\tnull\n"; |
| else if (value instanceof String) |
| retval += keys.get(i) + ":\t" + value + "\n"; |
| else if (value instanceof Calendar) |
| retval += keys.get(i) + ":\t" + ((Calendar) value).getTime() + "\n"; |
| else if (value instanceof InetAddress[] || value instanceof String []) { |
| retval += "Known IPs:\t"; |
| for (InetAddress ip : ((InetAddress[]) value)) |
| retval += ip.getHostAddress() + " "; |
| retval += "\n"; |
| } else { |
| retval += keys.get(i) + ":\t" + value.toString() + "\n"; |
| } |
| } |
| return retval; |
| } |
| |
| } |