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https://issues.apache.org/jira/browse/FLINK-4395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15834072#comment-15834072
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ASF GitHub Bot commented on FLINK-4395:
---------------------------------------
Github user chermenin commented on a diff in the pull request:
https://github.com/apache/flink/pull/2396#discussion_r97272232
--- Diff:
flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/operator/ProcessingType.java
---
@@ -0,0 +1,29 @@
+/*
+ * 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.flink.cep.operator;
+
+/**
+ * Defines what time should be considered when even is being processed.
+ */
+public enum ProcessingType {
+ // Consider time of event occurance when processing an event
+ EVENT_TIME,
+ processingType, // Consider local system time when processing an event
--- End diff --
I think this value is unnecessary.
> Eager processing of late arrivals in CEP operator
> -------------------------------------------------
>
> Key: FLINK-4395
> URL: https://issues.apache.org/jira/browse/FLINK-4395
> Project: Flink
> Issue Type: Improvement
> Components: CEP
> Reporter: Till Rohrmann
> Assignee: Ivan Mushketyk
> Priority: Minor
>
> At the moment elements are only processed after the CEP operator has received
> a watermark larger than the elements (in EventTime mode). In case of late
> arrivals this means that the late elements are not processed until the next
> watermark has arrived.
> In order to decrease the latency for this scenario, I propose to eagerly
> process late arrivals in the CEP operator.
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