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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
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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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