/**
 * Copyright (c) 2009-2015, rultor.com
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met: 1) Redistributions of source code must retain the above
 * copyright notice, this list of conditions and the following
 * disclaimer. 2) Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided
 * with the distribution. 3) Neither the name of the rultor.com nor
 * the names of its contributors may be used to endorse or promote
 * products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.rultor.agents.daemons;

import com.google.common.base.Joiner;
import com.jcabi.aspects.Immutable;
import com.jcabi.log.Logger;
import com.jcabi.ssh.SSH;
import com.jcabi.ssh.Shell;
import com.jcabi.xml.XML;
import com.rultor.agents.AbstractAgent;
import com.rultor.agents.shells.TalkShells;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import lombok.EqualsAndHashCode;
import lombok.ToString;
import org.xembly.Directive;
import org.xembly.Directives;

/**
 * Kills daemon if too old.
 *
 * @author Yegor Bugayenko (yegor@tpc2.com)
 * @version $Id$
 * @since 1.0
 */
@Immutable
@ToString
@EqualsAndHashCode(callSuper = false)
public final class KillsDaemon extends AbstractAgent {

    /**
     * Ctor.
     */
    public KillsDaemon() {
        this(TimeUnit.HOURS.toMinutes(1L));
    }

    /**
     * Ctor.
     * @param mins Maximum minutes per build
     */
    public KillsDaemon(final long mins) {
        super(
            "/talk/daemon[started and not(code) and not(ended)]",
            String.format(
                // @checkstyle LineLength (1 line)
                "/talk[(current-dateTime() - xs:dateTime(daemon/started)) div xs:dayTimeDuration('PT1M') > %d]",
                mins
        )
        );
    }

    @Override
    public Iterable<Directive> process(final XML xml) throws IOException {
        final Shell shell = new TalkShells(xml).get();
        final String dir = xml.xpath("/talk/daemon/dir/text()").get(0);
        new Shell.Empty(new Shell.Safe(shell)).exec(
            Joiner.on(" && ").join(
                String.format("dir=%s", SSH.escape(dir)),
                "if [ ! -e \"${dir}/pid\" ]; then exit 0; fi",
                "pid=$(cat \"${dir}/pid\")",
                "if [ -n \"$(ps -p $pid -opid=)\" ]; then kill ${pid}; fi",
                "sleep 15",
                "if [ -n \"$(ps -p $pid -opid=)\" ]; then kill -9 ${pid}; fi",
                "rm -f \"${dir}/pid\""
            )
        );
        Logger.info(
            this, "daemon of %s killed due to delay, in %s",
            xml.xpath("/talk/@name").get(0), dir
        );
        return new Directives();
    }

}

@@ -3287,16 +3287,56 @@
 id%5C%22)%22,%0A
+                %22rm -f %5C%22$%7Bdir%7D/pid%5C%22%22,%0A
         
@@ -3512,48 +3512,8 @@
  fi%22
-,%0A                %22rm -f %5C%22$%7Bdir%7D/pid%5C%22%22
 %0A   

remove before kill