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https://issues.apache.org/jira/browse/RYA-443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16364623#comment-16364623
 ] 

ASF GitHub Bot commented on RYA-443:
------------------------------------

Github user kchilton2 commented on a diff in the pull request:

    https://github.com/apache/incubator-rya/pull/272#discussion_r168277168
  
    --- Diff: 
extras/rya.streams/query-manager/src/main/java/org/apache/rya/streams/querymanager/QueryManagerDaemon.java
 ---
    @@ -0,0 +1,136 @@
    +/**
    + * 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.rya.streams.querymanager;
    +
    +import static java.util.Objects.requireNonNull;
    +
    +import java.io.InputStream;
    +import java.nio.file.Files;
    +import java.nio.file.Path;
    +import java.nio.file.Paths;
    +import java.util.concurrent.TimeUnit;
    +
    +import javax.xml.bind.JAXBException;
    +
    +import org.apache.commons.daemon.Daemon;
    +import org.apache.commons.daemon.DaemonContext;
    +import org.apache.commons.daemon.DaemonInitException;
    +import org.apache.rya.streams.kafka.KafkaStreamsFactory;
    +import org.apache.rya.streams.kafka.SingleThreadKafkaStreamsFactory;
    +import org.apache.rya.streams.kafka.interactor.CreateKafkaTopic;
    +import org.apache.rya.streams.querymanager.kafka.KafkaQueryChangeLogSource;
    +import org.apache.rya.streams.querymanager.kafka.LocalQueryExecutor;
    +import org.apache.rya.streams.querymanager.xml.Kafka;
    +import org.apache.rya.streams.querymanager.xml.QueryManagerConfig;
    +import 
org.apache.rya.streams.querymanager.xml.QueryManagerConfig.PerformanceTunning.QueryChanngeLogDiscoveryPeriod;
    +import 
org.apache.rya.streams.querymanager.xml.QueryManagerConfigUnmarshaller;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +import org.xml.sax.SAXException;
    +
    +import com.beust.jcommander.JCommander;
    +import com.beust.jcommander.Parameter;
    +import com.beust.jcommander.ParameterException;
    +import 
com.google.common.util.concurrent.AbstractScheduledService.Scheduler;
    +
    +import edu.umd.cs.findbugs.annotations.DefaultAnnotation;
    +import edu.umd.cs.findbugs.annotations.NonNull;
    +
    +/**
    + * JSVC integration code for a {@link QueryManager} to be used as a 
non-Windows daemon.
    + */
    +@DefaultAnnotation(NonNull.class)
    +public class QueryManagerDaemon implements Daemon {
    +
    +    private static final Logger log = 
LoggerFactory.getLogger(QueryManagerDaemon.class);
    +
    +    /**
    +     * The default configuration file's path for the application.
    +     */
    +    private static final Path DEFAULT_CONFIGURATION_PATH = 
Paths.get("config/configuration.xml");
    +
    +    /**
    +     * Command line parameters that are used by all commands that interact 
with Kafka.
    +     */
    +    class DaemonParameters {
    +        @Parameter(names = {"--config", "-c"}, required = false, 
description = "The path to the application's configuration file.")
    +        public String config;
    +    }
    +
    +    private QueryManager manager = null;
    +
    +    @Override
    +    public void init(final DaemonContext context) throws 
DaemonInitException, Exception {
    +        requireNonNull(context);
    +
    +        // Parse the command line arguments for the configuration file to 
use.
    +        final String[] args = context.getArguments();
    +        final DaemonParameters params = new DaemonParameters();
    +        try {
    +            new JCommander(params).parse(args);
    +        } catch(final ParameterException e) {
    +            throw new DaemonInitException("Unable to parse the command 
line arguments.", e);
    +        }
    +        final Path configFile = params.config != null ? 
Paths.get(params.config) : DEFAULT_CONFIGURATION_PATH;
    +        log.info("Loading the following configuration file: " + 
configFile);
    +
    +        // Unmarshall the configuration file into an object.
    +        final QueryManagerConfig config;
    +        try(InputStream stream = Files.newInputStream(configFile)) {
    --- End diff --
    
    Done.


> Implement a single node query manager
> -------------------------------------
>
>                 Key: RYA-443
>                 URL: https://issues.apache.org/jira/browse/RYA-443
>             Project: Rya
>          Issue Type: Task
>            Reporter: Andrew Smith
>            Assignee: Kevin Chilton
>            Priority: Major
>
> We need an application that watches the QueryChangeLog to see when the 
> isActive state of queries changes and then reacts to the state change. If 
> isActive goes to true, the system must start processing the query. If it is 
> false, then it must stop processing the query. This application needs to 
> start when the host machine starts. We plan to support CentOS 7.



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