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https://issues.apache.org/jira/browse/NUTCH-2132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15428822#comment-15428822
]
ASF GitHub Bot commented on NUTCH-2132:
---------------------------------------
Github user lewismc commented on a diff in the pull request:
https://github.com/apache/nutch/pull/138#discussion_r75551602
--- Diff: src/java/org/apache/nutch/fetcher/FetcherThreadPublisher.java ---
@@ -0,0 +1,58 @@
+/*
+ * 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.nutch.fetcher;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.nutch.publisher.NutchPublishers;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class handles the publishing of the events to the queue
implementation.
+ *
+ */
+public class FetcherThreadPublisher {
+
+ private static NutchPublishers publisher;
+ private static final Logger LOG =
LoggerFactory.getLogger(FetcherThreadPublisher.class);
+
+ /**
+ * Configure all registered publishers
+ * @param conf
--- End diff --
Please complete Javadoc. If and when we upgrade to JDK 1.8 this will fail
the Javadoc generation.
> Publisher/Subscriber model for Nutch to emit events
> ----------------------------------------------------
>
> Key: NUTCH-2132
> URL: https://issues.apache.org/jira/browse/NUTCH-2132
> Project: Nutch
> Issue Type: New Feature
> Components: fetcher, REST_api
> Reporter: Sujen Shah
> Assignee: Chris A. Mattmann
> Labels: memex
> Fix For: 1.13
>
> Attachments: NUTCH-2132.patch, NUTCH-2132.v2.patch,
> PubSub_routingkey.patch
>
>
> It would be nice to have a Pub/Sub model in Nutch to emit certain events (ex-
> Fetcher events like fetch-start, fetch-end, a fetch report which may contain
> data like outlinks of the current fetched url, score, etc).
> A consumer of this functionality could use this data to generate real time
> visualization and generate statics of the crawl without having to wait for
> the fetch round to finish.
> The REST API could contain an endpoint which would respond with a url to
> which a client could subscribe to get the fetcher events.
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