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https://issues.apache.org/jira/browse/STORM-1175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15068472#comment-15068472
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ASF GitHub Bot commented on STORM-1175:
---------------------------------------
Github user harshach commented on a diff in the pull request:
https://github.com/apache/storm/pull/939#discussion_r48279238
--- Diff: storm-core/src/jvm/backtype/storm/spout/CheckPointState.java ---
@@ -0,0 +1,78 @@
+/**
+ * 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 backtype.storm.spout;
+
+/**
+ * Captures the current state of the transaction in
+ * {@link CheckpointSpout}
+ */
+public class CheckPointState {
+ public long txid;
+ public State state;
+
+ public enum State {
+ /**
+ * The checkpoint spout has committed the transaction.
+ */
+ COMMITTED,
+ /**
+ * The checkpoint spout has started committing the transaction.
+ */
+ COMMITTING,
+ /**
+ * The checkpoint spout has started preparing the transaction for
commit.
+ */
+ PREPARING
--- End diff --
PREPARE probably better
> State store for windowing operations
> ------------------------------------
>
> Key: STORM-1175
> URL: https://issues.apache.org/jira/browse/STORM-1175
> Project: Apache Storm
> Issue Type: Sub-task
> Reporter: Arun Mahadevan
> Assignee: Arun Mahadevan
>
> Windowing operations should be able to save the results of partial
> computations in a state store. This should persist across restarts and bolts
> should be able to look up the values from the store.
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