com.hazelcast.jet.impl.util.WrappingProcessorSupplier Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2018, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.jet.impl.util;
import com.hazelcast.jet.core.Processor;
import com.hazelcast.jet.core.ProcessorSupplier;
import com.hazelcast.jet.function.DistributedFunction;
import javax.annotation.Nonnull;
import java.util.Collection;
import static java.util.stream.Collectors.toList;
/**
* A {@link ProcessorSupplier} which wraps another {@code ProcessorSupplier}
* with one that will wrap its processors using {@code wrapperSupplier}.
*/
public final class WrappingProcessorSupplier implements ProcessorSupplier {
private ProcessorSupplier wrapped;
private DistributedFunction wrapperSupplier;
public WrappingProcessorSupplier(ProcessorSupplier wrapped,
DistributedFunction wrapperSupplier
) {
this.wrapped = wrapped;
this.wrapperSupplier = wrapperSupplier;
}
@Nonnull
@Override
public Collection get(int count) {
Collection processors = wrapped.get(count);
return processors.stream()
.map(wrapperSupplier)
.collect(toList());
}
@Override
public void init(@Nonnull Context context) {
wrapped.init(context);
}
@Override
public void close(Throwable error) {
wrapped.close(error);
}
}