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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed 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 com.android.loganalysis.parser;
import com.android.loganalysis.item.TopItem;
import com.android.loganalysis.util.ArrayUtil;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* A {@link IParser} to handle the output of the top command output.
* <p>
* The parser only record the last top entry if multiple entries are printed by the top command. It
* only parses the total cpu usage.
* </p>
*/
public class TopParser implements IParser {
/**
* Match a valid cpu ticks line, such as:
* "User 5 + Nice 0 + Sys 14 + Idle 207 + IOW 0 + IRQ 0 + SIRQ 0 = 226"
*/
private static final Pattern TICKS_PAT = Pattern.compile(
"User (\\d+) \\+ Nice (\\d+) \\+ Sys (\\d+) \\+ Idle (\\d+) \\+ IOW (\\d+) \\+ " +
"IRQ (\\d+) \\+ SIRQ (\\d+) = (\\d+)");
/**
* {@inheritDoc}
*/
@Override
public TopItem parse(List<String> lines) {
final String text = ArrayUtil.join("\n", lines).trim();
if ("".equals(text)) {
return null;
}
TopItem item = new TopItem();
item.setText(text);
for (String line : lines) {
Matcher m = TICKS_PAT.matcher(line);
if (m.matches()) {
item.setUser(Integer.parseInt(m.group(1)));
item.setNice(Integer.parseInt(m.group(2)));
item.setSystem(Integer.parseInt(m.group(3)));
item.setIdle(Integer.parseInt(m.group(4)));
item.setIow(Integer.parseInt(m.group(5)));
item.setIrq(Integer.parseInt(m.group(6)));
item.setSirq(Integer.parseInt(m.group(7)));
item.setTotal(Integer.parseInt(m.group(8)));
}
}
return item;
}
}
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