SensorsParser.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.Calendar;
- import java.util.regex.Matcher;
- import java.util.regex.Pattern;
- /**********************************************************
- * Objects of this class parse the output of the lm-sensors utility
- * to gather information about fan speed, temperatures for cpus
- * and motherboard etc.
- *
- **********************************************************/
- public class SensorsParser extends ShellParser {
- /**
- * Reads and parses the output of the 'sensors' command
- * and creates an appropriate EventRecord that holds
- * the desirable information.
- *
- * @param s unused parameter
- *
- * @return the EventRecord created
- */
- public EventRecord query(String s) throws Exception {
- StringBuffer sb;
- //sb = Environment.runCommand("sensors -A");
- sb = Environment.runCommand("cat sensors.out");
- EventRecord retval = new EventRecord(InetAddress.getLocalHost()
- .getCanonicalHostName(), InetAddress.getAllByName(InetAddress.getLocalHost()
- .getHostName()), Calendar.getInstance(), "lm-sensors", "Unknown",
- "sensors -A", "-");
- readGroup(retval, sb, "fan");
- readGroup(retval, sb, "in");
- readGroup(retval, sb, "temp");
- readGroup(retval, sb, "Core");
- return retval;
- }
- /**
- * Reads and parses lines that provide the output
- * of a group of sensors with the same functionality.
- *
- * @param er the EventRecord to which the new attributes are added
- * @param sb the text to parse
- * @param prefix a String prefix specifying the common prefix of the
- * sensors' names in the group (e.g. "fan", "in", "temp"
- *
- * @return the EventRecord created
- */
- private EventRecord readGroup(EventRecord er, StringBuffer sb, String prefix) {
- Pattern pattern = Pattern.compile(".*(" + prefix
- + "\s*\d*)\s*:\s*(\+?\d+)", Pattern.MULTILINE);
- Matcher matcher = pattern.matcher(sb);
- while (matcher.find())
- er.set(matcher.group(1), matcher.group(2));
- return er;
- }
- /**
- * Invokes query() to do the parsing and handles parsing errors.
- *
- * @return an array of EventRecords that holds one element that represents
- * the current state of the hardware sensors
- */
- public EventRecord[] monitor() {
- EventRecord[] recs = new EventRecord[1];
- try {
- recs[0] = query(null);
- } catch (Exception e) {
- e.printStackTrace();
- }
- return recs;
- }
-
- /**
- * Return a String with information about this class
- *
- * @return A String describing this class
- */
- public String getInfo() {
- return ("lm-sensors parser");
- }
- }