org.apache.jackrabbit.oak.threadDump.ThreadDumpThreadNames Maven / Gradle / Ivy
/*
* 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.jackrabbit.oak.threadDump;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.PrintWriter;
import java.sql.Timestamp;
/**
* A tool that converts a file with date/time and thread dumps into a list of
* date/time and just the thread names.
*/
public class ThreadDumpThreadNames {
public static File process(File file) throws IOException {
String fileName = file.getName();
if (fileName.endsWith(".txt")) {
fileName = fileName.substring(0, fileName.length() - ".txt".length());
}
File target = new File(file.getParentFile(), fileName + ".threadNames.txt");
PrintWriter writer = new PrintWriter(new BufferedWriter(
new FileWriter(target)));
try {
processFile(file, writer);
} finally {
writer.close();
}
return target;
}
private static void processFile(File file, PrintWriter writer) throws IOException {
LineNumberReader r = new LineNumberReader(new BufferedReader(
new FileReader(file)));
try {
process(r, writer);
} finally {
r.close();
}
}
private static void process(LineNumberReader reader, PrintWriter writer) throws IOException {
String dateAndTime = "";
while (true) {
String line = reader.readLine();
if (line == null) {
break;
}
if (line.length() == "2017-06-29 17:23:17".length()) {
boolean isDateTime = true;
for(char c : line.toCharArray()) {
if (!Character.isDigit(c) && " -:".indexOf(c) < 0) {
isDateTime = false;
break;
}
}
if (isDateTime) {
dateAndTime = line;
continue;
}
}
if (line.startsWith("\"")) {
line = line.substring(0, line.lastIndexOf('\"') + 1);
line = appendTimestamp(line);
writer.write(dateAndTime + " " + line + "\n");
}
}
}
private static String appendTimestamp(String line) {
int start = line.indexOf("[");
if (start < 0) {
return line;
}
int end = line.indexOf("]", start);
if (end < 0) {
return line;
}
String millis = line.substring(start + 1, end);
try {
long m = Long.parseLong(millis);
String t = new Timestamp(m).toString();
return line + ": " + t;
} catch (NumberFormatException e) {
return line;
}
}
}