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Posted to commits@flink.apache.org by al...@apache.org on 2015/09/28 18:15:02 UTC
[06/12] flink git commit: Add Count and Delta WindowPolicy
Add Count and Delta WindowPolicy
Project: http://git-wip-us.apache.org/repos/asf/flink/repo
Commit: http://git-wip-us.apache.org/repos/asf/flink/commit/bfaad37c
Tree: http://git-wip-us.apache.org/repos/asf/flink/tree/bfaad37c
Diff: http://git-wip-us.apache.org/repos/asf/flink/diff/bfaad37c
Branch: refs/heads/master
Commit: bfaad37c0aa8ac43a282a8c9cb2e0d64fdf22f72
Parents: 86c45bf
Author: Aljoscha Krettek <al...@gmail.com>
Authored: Thu Sep 24 17:42:15 2015 +0200
Committer: Aljoscha Krettek <al...@gmail.com>
Committed: Mon Sep 28 17:04:16 2015 +0200
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.../api/windowing/windowpolicy/Count.java | 58 +++++++++++++++++
.../api/windowing/windowpolicy/Delta.java | 68 ++++++++++++++++++++
2 files changed, 126 insertions(+)
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http://git-wip-us.apache.org/repos/asf/flink/blob/bfaad37c/flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/windowing/windowpolicy/Count.java
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diff --git a/flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/windowing/windowpolicy/Count.java b/flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/windowing/windowpolicy/Count.java
new file mode 100644
index 0000000..5fb7d58
--- /dev/null
+++ b/flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/windowing/windowpolicy/Count.java
@@ -0,0 +1,58 @@
+/*
+ * 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.streaming.api.windowing.windowpolicy;
+
+
+/**
+ * A windowing policy that generates windows based on element counts.
+ */
+public final class Count extends WindowPolicy {
+
+ private static final long serialVersionUID = 3197290738634320211L;
+
+ private long size;
+
+ /** Instantiation only via factory method */
+ private Count(long size) {
+ this.size = size;
+ }
+
+ public long getSize() {
+ return size;
+ }
+
+ @Override
+ public String toString() {
+ return "Count Window (" + size + ')';
+ }
+
+ // ------------------------------------------------------------------------
+ // Factory
+ // ------------------------------------------------------------------------
+
+ /**
+ * Creates a count based windowing policy
+ *
+ * @param size The size of the generated windows.
+ * @return The time policy.
+ */
+ public static Count of(long size) {
+ return new Count(size);
+ }
+}
http://git-wip-us.apache.org/repos/asf/flink/blob/bfaad37c/flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/windowing/windowpolicy/Delta.java
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diff --git a/flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/windowing/windowpolicy/Delta.java b/flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/windowing/windowpolicy/Delta.java
new file mode 100644
index 0000000..4a3082c
--- /dev/null
+++ b/flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/windowing/windowpolicy/Delta.java
@@ -0,0 +1,68 @@
+/*
+ * 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.streaming.api.windowing.windowpolicy;
+
+
+import org.apache.flink.streaming.api.functions.windowing.delta.DeltaFunction;
+
+/**
+ * A windowing policy that generates windows based on a delta between elements.
+ */
+public final class Delta<T> extends WindowPolicy {
+
+ private static final long serialVersionUID = 3197290738634320211L;
+
+ private DeltaFunction<T> deltaFunction;
+
+ private double threshold;
+
+ /** Instantiation only via factory method */
+ private Delta(DeltaFunction<T> deltaFunction, double threshold) {
+ this.deltaFunction = deltaFunction;
+ this.threshold = threshold;
+ }
+
+ public DeltaFunction<T> getDeltaFunction() {
+ return deltaFunction;
+ }
+
+ public double getThreshold() {
+ return threshold;
+ }
+
+ @Override
+ public String toString() {
+ return "Delta Window (" + deltaFunction + ", " + threshold + ')';
+ }
+
+ // ------------------------------------------------------------------------
+ // Factory
+ // ------------------------------------------------------------------------
+
+ /**
+ * Creates a delta based windowing policy
+ *
+ * @param threshold The threshold for deltas at which to trigger windows
+ * @param deltaFunction The delta function
+ * @return The time policy.
+ */
+ public static <T> Delta<T> of(double threshold, DeltaFunction<T> deltaFunction) {
+ return new Delta<T>(deltaFunction, threshold);
+ }
+}