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https://issues.apache.org/jira/browse/FLINK-8159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16692741#comment-16692741
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ASF GitHub Bot commented on FLINK-8159:
---------------------------------------
sunjincheng121 commented on a change in pull request #7110: [FLINK-8159] [cep]
Pattern(Flat)SelectFunctions should support RichFunction interface
URL: https://github.com/apache/flink/pull/7110#discussion_r234885267
##########
File path:
flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/RichPatternFlatSelectFunction.java
##########
@@ -0,0 +1,57 @@
+/*
+ * 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;
+
+import org.apache.flink.api.common.functions.AbstractRichFunction;
+import org.apache.flink.api.common.functions.RichFunction;
+import org.apache.flink.api.common.functions.RuntimeContext;
+import org.apache.flink.util.Collector;
+import org.apache.flink.util.Preconditions;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Rich variant of the {@link PatternFlatSelectFunction}. As a {@link
RichFunction}, it gives access to the
+ * {@link org.apache.flink.api.common.functions.RuntimeContext} and provides
setup and teardown methods:
+ * {@link RichFunction#open(org.apache.flink.configuration.Configuration)} and
+ * {@link RichFunction#close()}.
+ *
+ * @param <IN> Type of the input elements
+ * @param <OUT> Type of the output element
+ */
+public abstract class RichPatternFlatSelectFunction<IN, OUT>
Review comment:
Add the test case in `CEPITCase`.
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> Pattern(Flat)SelectFunctions should support RichFunction interface
> ------------------------------------------------------------------
>
> Key: FLINK-8159
> URL: https://issues.apache.org/jira/browse/FLINK-8159
> Project: Flink
> Issue Type: Sub-task
> Components: CEP
> Reporter: Dian Fu
> Assignee: Dian Fu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.8.0
>
>
> {{SelectWrapper}} and {{FlatSelectWrapper}} should extends
> {{AbstractRichFucntion}} and process properly if the underlying functions
> extend RichFunction.
> Things to be very careful about:
> * backwards compatibility (we previously serialized conditions) - changes to
> those interfaces have to be done carefully
> * we want to be able to add dynamic patterns in the future, so at some point
> we have to open also on control message arrival
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