EventRecord.java
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上传日期:2018-01-08
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- /**
- * 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) + ":tnulln";
- 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;
- }
- }