CountThreads.java

/*
       This file is part of mjprof.

        mjprof is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 3 of the License, or
        (at your option) any later version.

        mjprof is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with mjprof.  If not, see <http://www.gnu.org/licenses/>.
*/

package com.performizeit.mjprof.plugins.terminals;

import com.performizeit.mjprof.plugin.types.Terminal;
import com.performizeit.mjprof.api.Plugin;
import com.performizeit.mjprof.parser.ThreadDump;
import com.performizeit.mjprof.parser.ThreadInfo;
import com.performizeit.plumbing.PipeHandler;


@SuppressWarnings("unused")
@Plugin(name = "count", params = {}, description = "counts number of threads")
public class CountThreads implements Terminal, PipeHandler<ThreadDump, String> {
  @Override
  public String handleMsg(ThreadDump msg) {
    int count = 0;
    for (ThreadInfo mss : msg.getStacks()) {
      int inc = mss.getVal("count") == null ? 1 : (Integer) mss.getVal("count");

      count += inc;
    }
    return msg.getHeader() + "\n" + "Total number of threads is " + count + "\n";
  }

  @Override
  public String handleDone() {
    return null;
  }
}