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ArrayOfHandles.java
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ArrayOfHandles.java
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/*
* 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.giraph.block_app.reducers.array;
import java.util.ArrayList;
import org.apache.giraph.block_app.framework.api.BlockMasterApi;
import org.apache.giraph.block_app.framework.piece.global_comm.BroadcastHandle;
import org.apache.giraph.block_app.framework.piece.global_comm.ReducerHandle;
import org.apache.giraph.block_app.framework.piece.global_comm.array.ArrayHandle;
import org.apache.giraph.block_app.framework.piece.global_comm.array.BroadcastArrayHandle;
import org.apache.giraph.block_app.framework.piece.global_comm.array.ReducerArrayHandle;
import org.apache.giraph.function.Supplier;
import org.apache.giraph.function.primitive.Int2ObjFunction;
import org.apache.giraph.worker.WorkerBroadcastUsage;
/**
* ArrayHandle implemented as an array of individual handles.
*
* @param <H> Handle type
*/
public class ArrayOfHandles<H> implements ArrayHandle<H> {
protected final ArrayList<H> handles;
public ArrayOfHandles(int count, Supplier<H> reduceHandleFactory) {
handles = new ArrayList<>();
for (int i = 0; i < count; i++) {
handles.add(reduceHandleFactory.get());
}
}
public ArrayOfHandles(int count, Int2ObjFunction<H> reduceHandleFactory) {
handles = new ArrayList<>();
for (int i = 0; i < count; i++) {
handles.add(reduceHandleFactory.apply(i));
}
}
@Override
public H get(int index) {
return handles.get(index);
}
@Override
public int getStaticSize() {
return handles.size();
}
/**
* ReducerArrayHandle implemented as an array of separate reducer handles.
*
* @param <H> Handle type
*/
public static class ArrayOfReducers<S, R>
extends ArrayOfHandles<ReducerHandle<S, R>>
implements ReducerArrayHandle<S, R> {
public ArrayOfReducers(
int count, Supplier<ReducerHandle<S, R>> reduceHandleFactory) {
super(count, reduceHandleFactory);
}
public ArrayOfReducers(
int count, Int2ObjFunction<ReducerHandle<S, R>> reduceHandleFactory) {
super(count, reduceHandleFactory);
}
@Override
public int getReducedSize(BlockMasterApi master) {
return getStaticSize();
}
@Override
public BroadcastArrayHandle<R> broadcastValue(final BlockMasterApi master) {
return new ArrayOfBroadcasts<>(
getStaticSize(),
new Int2ObjFunction<BroadcastHandle<R>>() {
@Override
public BroadcastHandle<R> apply(int index) {
return get(index).broadcastValue(master);
}
});
}
}
/**
* BroadcastArrayHandle implemented as an array of separate broadcast handles.
*
* @param <T> Handle type
*/
public static class ArrayOfBroadcasts<T>
extends ArrayOfHandles<BroadcastHandle<T>>
implements BroadcastArrayHandle<T> {
public ArrayOfBroadcasts(
int count,
Int2ObjFunction<BroadcastHandle<T>> broadcastHandleFactory) {
super(count, broadcastHandleFactory);
}
public ArrayOfBroadcasts(
int count,
Supplier<BroadcastHandle<T>> broadcastHandleFactory) {
super(count, broadcastHandleFactory);
}
@Override
public int getBroadcastedSize(WorkerBroadcastUsage worker) {
return getStaticSize();
}
}
}