LogConfigBuilder.java

package com.google.jstestdriver.util;

import com.google.common.collect.Lists;

import java.util.List;

public class LogConfigBuilder {
  List<String> handlers = Lists.newLinkedList();
  List<String> configLines = Lists.newLinkedList();

  public LogConfigBuilder useFileHandler() {
    handlers.add("java.util.logging.FileHandler");
    configLines.add("java.util.logging.FileHandler.pattern=%t/jstd-" +
                    System.currentTimeMillis() +
                    ".log");
    configLines.add("java.util.logging.FileHandler.formatter=java.util.logging.SimpleFormatter");
    configLines.add("java.util.logging.FileHandler.level=ALL");
    return this;
  }
  
  public LogConfigBuilder useConsoleHandler() {
    handlers.add("java.util.logging.ConsoleHandler");
    configLines.add("java.util.logging.ConsoleHandler.level=ALL");
    return this;
  }
  
  public LogConfigBuilder useMemoryHandler(int pushCount) {
    handlers.add("java.util.logging.MemoryHandler");
    configLines.add("java.util.logging.MemoryHandler.target=java.util.logging.ConsoleHandler");
    configLines.add("java.util.logging.MemoryHandler.size=" + pushCount);
    return this;
  }

  public LogConfigBuilder finest(String className) {
    configLines.add(className + ".level=FINEST");
    return this;
  }

  public LogConfigBuilder severe(String className) {
    configLines.add(className + ".level=SEVERE");
    return this;
  }
  
  public LogConfigBuilder warn(String className) {
    configLines.add(className + ".level=WARNING");
    return this;
  }

  public LogConfigBuilder info(String className) {
    configLines.add(className + ".level=INFO");
    return this;
  }
  
  public LogConfigBuilder fine(String className) {
    configLines.add(className + ".level=FINE");
    return this;
  }

  public String build() {
    StringBuilder builder = new StringBuilder("handlers=");
    String sep = "";
    for (String handler : handlers) {
      builder.append(sep).append(handler);
      sep = ",";
    }
    builder.append('\n');
    for (String line : configLines) {
      builder.append(line).append('\n');
    }
    return builder.toString();
  }
}