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[streaming] Added counter aggregation
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50 changes: 50 additions & 0 deletions
50
...ore/src/main/java/org/apache/flink/streaming/api/invokable/operator/CounterInvokable.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| /** | ||
| * 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:https://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. | ||
| */ | ||
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| package org.apache.flink.streaming.api.invokable.operator; | ||
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| import org.apache.flink.streaming.api.invokable.StreamOperatorInvokable; | ||
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| public class CounterInvokable<IN> extends StreamOperatorInvokable<IN, Long> { | ||
| private static final long serialVersionUID = 1L; | ||
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| Long count = 0L; | ||
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| public CounterInvokable() { | ||
| super(null); | ||
| } | ||
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| @Override | ||
| protected void immutableInvoke() throws Exception { | ||
| while ((reuse = recordIterator.next(reuse)) != null) { | ||
| callUserFunctionAndLogException(); | ||
| resetReuse(); | ||
| } | ||
| } | ||
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| @Override | ||
| protected void mutableInvoke() throws Exception { | ||
| while ((reuse = recordIterator.next(reuse)) != null) { | ||
| callUserFunctionAndLogException(); | ||
| } | ||
| } | ||
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| @Override | ||
| protected void callUserFunction() throws Exception { | ||
| collector.collect(++count); | ||
| } | ||
| } |
39 changes: 39 additions & 0 deletions
39
...src/test/java/org/apache/flink/streaming/api/invokable/operator/CounterInvokableTest.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,39 @@ | ||
| /** | ||
| * 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:https://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. | ||
| */ | ||
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| package org.apache.flink.streaming.api.invokable.operator; | ||
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| import static org.junit.Assert.assertEquals; | ||
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| import java.util.Arrays; | ||
| import java.util.List; | ||
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| import org.apache.flink.streaming.util.MockInvokable; | ||
| import org.junit.Test; | ||
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| public class CounterInvokableTest { | ||
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| @Test | ||
| public void counterTest() { | ||
| CounterInvokable<String> invokable = new CounterInvokable<String>(); | ||
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| List<Long> expected = Arrays.asList(1L, 2L, 3L); | ||
| List<Long> actual = MockInvokable.createAndExecute(invokable, Arrays.asList("one", "two", "three")); | ||
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| assertEquals(expected, actual); | ||
| } | ||
| } |