| /* |
| * 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.cassandra.utils.concurrent; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| import java.util.function.BiConsumer; |
| import java.util.function.BinaryOperator; |
| import java.util.function.Function; |
| import java.util.function.Supplier; |
| import java.util.stream.Collector; |
| import java.util.stream.Stream; |
| |
| public class Threads |
| { |
| public static class StackTraceCombiner implements Collector<StackTraceElement, StringBuilder, String>, Supplier<StringBuilder>, Function<StringBuilder, String> |
| { |
| final boolean printBriefPackages; |
| final String prefix; |
| final String delimiter; |
| final String suffix; |
| |
| public StackTraceCombiner(boolean printBriefPackages, String prefix, String delimiter, String suffix) |
| { |
| this.printBriefPackages = printBriefPackages; |
| this.prefix = prefix; |
| this.delimiter = delimiter; |
| this.suffix = suffix; |
| } |
| |
| public Supplier<StringBuilder> supplier() |
| { |
| |
| return this; |
| } |
| |
| public BiConsumer<StringBuilder, StackTraceElement> accumulator() |
| { |
| return (sb, ste) -> |
| { |
| if (sb.length() > prefix.length()) |
| sb.append(delimiter); |
| |
| String className = ste.getClassName(); |
| |
| if (printBriefPackages) |
| { |
| int afterPrevDot = 0; |
| while (true) |
| { |
| int dot = className.indexOf('.', afterPrevDot); |
| if (dot < 0) |
| break; |
| |
| sb.append(className.charAt(afterPrevDot)); |
| sb.append('.'); |
| afterPrevDot = dot + 1; |
| } |
| sb.append(className, afterPrevDot, className.length()); |
| } |
| else |
| { |
| sb.append(className); |
| } |
| sb.append('.'); |
| sb.append(ste.getMethodName()); |
| sb.append(':'); |
| sb.append(ste.getLineNumber()); |
| }; |
| } |
| |
| public BinaryOperator<StringBuilder> combiner() |
| { |
| return (sb1, sb2) -> sb1.append("; ").append(sb2); |
| } |
| |
| public Function<StringBuilder, String> finisher() |
| { |
| return this; |
| } |
| |
| public Set<Characteristics> characteristics() |
| { |
| return Collections.emptySet(); |
| } |
| |
| public StringBuilder get() |
| { |
| return new StringBuilder(prefix); |
| } |
| |
| public String apply(StringBuilder finish) |
| { |
| finish.append(suffix); |
| return finish.toString(); |
| } |
| } |
| |
| public static String prettyPrintStackTrace(Thread thread, boolean printBriefPackages, String delimiter) |
| { |
| return prettyPrint(thread.getStackTrace(), printBriefPackages, delimiter); |
| } |
| |
| public static String prettyPrintStackTrace(Thread thread, boolean printBriefPackages, String prefix, String delimiter, String suffix) |
| { |
| return prettyPrint(thread.getStackTrace(), printBriefPackages, prefix, delimiter, suffix); |
| } |
| |
| public static String prettyPrint(StackTraceElement[] st, boolean printBriefPackages, String delimiter) |
| { |
| return prettyPrint(st, printBriefPackages, "", delimiter, ""); |
| } |
| |
| public static String prettyPrint(StackTraceElement[] st, boolean printBriefPackages, String prefix, String delimiter, String suffix) |
| { |
| return Stream.of(st).collect(new StackTraceCombiner(printBriefPackages, prefix, delimiter, suffix)); |
| } |
| |
| public static String prettyPrint(Stream<StackTraceElement> st, boolean printBriefPackages, String prefix, String delimiter, String suffix) |
| { |
| return st.collect(new StackTraceCombiner(printBriefPackages, prefix, delimiter, suffix)); |
| } |
| |
| } |