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[euphoria-flink] #260 Flink - broadcast hash join
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euphoria-core/src/main/java/cz/seznam/euphoria/core/executor/util/MultiValueContext.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| /* | ||
| * Copyright 2016-2018 Seznam.cz, a.s. | ||
| * | ||
| * Licensed 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 cz.seznam.euphoria.core.executor.util; | ||
|
|
||
| import cz.seznam.euphoria.core.annotation.audience.Audience; | ||
| import cz.seznam.euphoria.core.client.accumulators.Counter; | ||
| import cz.seznam.euphoria.core.client.accumulators.Histogram; | ||
| import cz.seznam.euphoria.core.client.accumulators.Timer; | ||
| import cz.seznam.euphoria.core.client.dataset.windowing.Window; | ||
| import cz.seznam.euphoria.core.client.io.Collector; | ||
| import cz.seznam.euphoria.core.client.io.Context; | ||
|
|
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| import javax.annotation.Nullable; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
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| @Audience(Audience.Type.EXECUTOR) | ||
| public class MultiValueContext<T> implements Context, Collector<T> { | ||
|
|
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| private final List<T> elements = new ArrayList<>(1); | ||
| @Nullable | ||
| final Context wrap; | ||
|
|
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| public MultiValueContext() { | ||
| this(null); | ||
| } | ||
|
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| public MultiValueContext(Context wrap) { | ||
| this.wrap = wrap; | ||
| } | ||
|
|
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| /** | ||
| * Replace the stored value with given one. | ||
| * | ||
| * @param elem the element to store | ||
| */ | ||
| @Override | ||
| public void collect(T elem) { | ||
| elements.add(elem); | ||
| } | ||
|
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| @Override | ||
| public Context asContext() { | ||
| return this; | ||
| } | ||
|
|
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| /** | ||
| * Retrieve window associated with the stored element. | ||
| */ | ||
| @Override | ||
| public Window<?> getWindow() throws UnsupportedOperationException { | ||
| if (wrap == null) { | ||
| throw new UnsupportedOperationException( | ||
| "The window is unknown in this context"); | ||
| } | ||
| return wrap.getWindow(); | ||
| } | ||
|
|
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| @Override | ||
| public Counter getCounter(String name) { | ||
| if (wrap == null) { | ||
| throw new UnsupportedOperationException( | ||
| "Accumulators not supported in this context"); | ||
| } | ||
| return wrap.getCounter(name); | ||
| } | ||
|
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| @Override | ||
| public Histogram getHistogram(String name) { | ||
| if (wrap == null) { | ||
| throw new UnsupportedOperationException( | ||
| "Accumulators not supported in this context"); | ||
| } | ||
| return wrap.getHistogram(name); | ||
|
|
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| } | ||
|
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| @Override | ||
| public Timer getTimer(String name) { | ||
| if (wrap == null) { | ||
| throw new UnsupportedOperationException( | ||
| "Accumulators not supported in this context"); | ||
| } | ||
| return wrap.getTimer(name); | ||
|
|
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| } | ||
|
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| /** | ||
| * Retrieve and reset the stored elements. | ||
| * | ||
| * @return the stored value | ||
| */ | ||
| public List<T> getAndResetValue() { | ||
| List<T> copiedElements = new ArrayList<>(elements); | ||
| elements.clear(); | ||
| return copiedElements; | ||
| } | ||
|
|
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| /** | ||
| * Retrieve value of this context. | ||
| * | ||
| * @return value | ||
| */ | ||
| public List<T> get() { | ||
| return elements; | ||
| } | ||
| } | ||
|
|
47 changes: 47 additions & 0 deletions
47
euphoria-core/src/main/java/cz/seznam/euphoria/core/executor/util/Translation.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| package cz.seznam.euphoria.core.executor.util;/* | ||
| * Copyright 2016-2018 Seznam.cz, a.s. | ||
| * | ||
| * Licensed 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. | ||
| */ | ||
|
|
||
| import cz.seznam.euphoria.core.client.functional.UnaryPredicate; | ||
| import cz.seznam.euphoria.core.client.operator.Operator; | ||
|
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Objects; | ||
|
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| public class Translation<T, O extends Operator<?, ?>> { | ||
| final T translator; | ||
| final UnaryPredicate<O> accept; | ||
|
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| private Translation( | ||
| T translator, UnaryPredicate<O> accept) { | ||
| this.translator = Objects.requireNonNull(translator); | ||
| this.accept = accept; | ||
| } | ||
|
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| static <T, O extends Operator<?, ?>> void add( | ||
| Map<Class, List<Translation>> idx, | ||
| Class<O> type, T translator) { | ||
| add(idx, type, translator, null); | ||
| } | ||
|
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| static <T, O extends Operator<?, ?>> void add( | ||
| Map<Class, List<Translation>> idx, | ||
| Class<O> type, T translator, UnaryPredicate<O> accept) { | ||
| idx.putIfAbsent(type, new ArrayList<>()); | ||
| idx.get(type).add(new Translation<>(translator, accept)); | ||
| } | ||
| } |
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