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https://issues.apache.org/jira/browse/STORM-1167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14991123#comment-14991123
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ASF GitHub Bot commented on STORM-1167:
---------------------------------------
Github user arunmahadevan commented on a diff in the pull request:
https://github.com/apache/storm/pull/855#discussion_r43976038
--- Diff:
storm-core/src/jvm/backtype/storm/windowing/CountTriggerPolicy.java ---
@@ -0,0 +1,62 @@
+/**
+ * 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
+ * <p/>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p/>
+ * 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 backtype.storm.windowing;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * A trigger that tracks event counts and calls back {@link
TriggerHandler#onTrigger()}
+ * when the count threshold is hit.
+ *
+ * @param <T> the type of event tracked by this policy.
+ */
+public class CountTriggerPolicy<T> implements TriggerPolicy<T> {
+ private final int count;
+ private AtomicInteger currentCount;
+ private TriggerHandler handler;
--- End diff --
Thanks, I missed it will make it final.
> Add sliding & tumbling window support for core storm
> ----------------------------------------------------
>
> Key: STORM-1167
> URL: https://issues.apache.org/jira/browse/STORM-1167
> Project: Apache Storm
> Issue Type: Improvement
> Reporter: Arun Mahadevan
> Assignee: Arun Mahadevan
>
> Currently, topologies that needs windowing support requires writing custom
> logic inside bolts making it tedious to handle the windowing and acking logic
> with custom logic.
> We can add framework level support to core storm bolts to process tuples in a
> time or a count based window. Sliding and tumbling windows can be supported.
> Later this can be extended to trident apis as well.
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