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/*
* Copyright (C) 2016 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.IItem;
import com.android.loganalysis.item.ServiceInfoItem;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Parse the dmesg logs. </p>
*/
public class DmesgParser implements IParser {
private static final String SERVICENAME = "SERVICENAME";
private static final String TIMESTAMP = "TIMESTAMP";
// Matches: [ 14.822691] init:
private static final String SERVICE_PREFIX = String.format("^\\[\\s+(?<%s>.*)\\] init:\\s+",
TIMESTAMP);
// Matches: starting service 'ueventd'...
private static final String START_SERVICE_SUFFIX = String.format("starting service "
+ "\\'(?<%s>.*)\\'...", SERVICENAME);
// Matches: Service 'ueventd' (pid 439) exited with status 0
private static final String EXIT_SERVICE_SUFFIX = String.format("Service \\'(?<%s>.*)\\'\\s+"
+ "\\((?<PID>.*)\\) exited with status 0", SERVICENAME);
private static final Pattern START_SERVICE = Pattern.compile(
String.format("%s%s", SERVICE_PREFIX, START_SERVICE_SUFFIX));
private static final Pattern EXIT_SERVICE = Pattern.compile(
String.format("%s%s", SERVICE_PREFIX, EXIT_SERVICE_SUFFIX));
private Map<String, ServiceInfoItem> mServiceInfoItems = new HashMap<String, ServiceInfoItem>();
@Override
public IItem parse(List<String> lines) {
throw new UnsupportedOperationException("Method has not been implemented in lieu"
+ " of others");
}
/**
* Parse init services start time and end time from dmesg logs and store the duration it took to
* complete the service if the end time stamp is available.
*
* @param input dmesg logs
* @return list of ServiceInfoItems which contains service start and end time
* @throws IOException
*/
public List<ServiceInfoItem> parseServiceInfo(BufferedReader input)
throws IOException {
String line;
while ((line = input.readLine()) != null) {
Matcher match = null;
if ((match = matches(START_SERVICE, line)) != null) {
ServiceInfoItem serviceItem = new ServiceInfoItem();
serviceItem.setServiceName(match.group(SERVICENAME));
serviceItem.setStartTime((long) (Double.parseDouble(
match.group(TIMESTAMP)) * 1000));
getServiceInfoItems().put(match.group(SERVICENAME), serviceItem);
} else if ((match = matches(EXIT_SERVICE, line)) != null) {
if (getServiceInfoItems().containsKey(match.group(SERVICENAME))) {
ServiceInfoItem serviceItem = getServiceInfoItems().get(
match.group(SERVICENAME));
serviceItem.setEndTime((long) (Double.parseDouble(
match.group(TIMESTAMP)) * 1000));
}
}
}
return new ArrayList<ServiceInfoItem>(getServiceInfoItems().values());
}
/**
* Checks whether {@code line} matches the given {@link Pattern}.
*
* @return The resulting {@link Matcher} obtained by matching the {@code line} against
* {@code pattern}, or null if the {@code line} does not match.
*/
private static Matcher matches(Pattern pattern, String line) {
Matcher ret = pattern.matcher(line);
return ret.matches() ? ret : null;
}
public Map<String, ServiceInfoItem> getServiceInfoItems() {
return mServiceInfoItems;
}
public void setServiceInfoItems(Map<String, ServiceInfoItem> serviceInfoItems) {
this.mServiceInfoItems = serviceInfoItems;
}
}
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