com.netflix.genie.core.util.UnixProcessChecker.java Source code

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Here is the source code for com.netflix.genie.core.util.UnixProcessChecker.java

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/*
 *
 *  Copyright 2016 Netflix, Inc.
 *
 *     Licensed 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 com.netflix.genie.core.util;

import com.netflix.genie.common.exceptions.GenieTimeoutException;
import org.apache.commons.exec.CommandLine;
import org.apache.commons.exec.ExecuteException;
import org.apache.commons.exec.Executor;
import org.apache.commons.lang3.SystemUtils;

import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * Implementation of ProcessChecker for Unix based systems.
 *
 * @author tgianos
 * @since 3.0.0
 */
public class UnixProcessChecker implements ProcessChecker {

    private final Executor executor;
    private final CommandLine commandLine;
    private final Date timeout;
    private final SimpleDateFormat dateFormatter;

    /**
     * Constructor.
     *
     * @param pid      The process id to check.
     * @param executor The executor to use for generating system commands.
     * @param timeout  The time which after this job should be killed due to timeout
     */
    public UnixProcessChecker(@Min(1) final int pid, @NotNull final Executor executor,
            @NotNull final Date timeout) {
        if (!SystemUtils.IS_OS_UNIX) {
            throw new IllegalArgumentException("Not running on a Unix system.");
        }

        this.executor = executor;

        // Using PS for now but could instead check for existence of done file if this proves to have bad performance
        // send output to /dev/null so it doesn't print to the logs
        this.commandLine = new CommandLine("ps");
        this.commandLine.addArgument("-p");
        this.commandLine.addArgument(Integer.toString(pid));

        this.timeout = new Date(timeout.getTime());
        this.dateFormatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void checkProcess() throws GenieTimeoutException, ExecuteException, IOException {
        this.executor.execute(this.commandLine);

        // If we get here the process is still running. Check if it should be killed due to timeout.
        if (new Date().getTime() > this.timeout.getTime()) {
            throw new GenieTimeoutException(
                    "Job has exceeded its timeout time of " + this.dateFormatter.format(this.timeout));
        }
    }
}