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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.processing.test.documentation;
import com.yahoo.component.chain.Chain;
import com.yahoo.processing.Processor;
import com.yahoo.processing.Request;
import com.yahoo.processing.Response;
import com.yahoo.processing.execution.AsyncExecution;
import com.yahoo.processing.execution.Execution;
import com.yahoo.processing.response.FutureResponse;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* Call a number of chains in parallel
*/
public class Federator extends Processor {
private final List<Chain<? extends Processor>> chains;
@SafeVarargs
@SuppressWarnings("varargs")
public Federator(Chain<? extends Processor> ... chains) {
this.chains = Arrays.asList(chains);
}
@SuppressWarnings("unchecked")
@Override
public Response process(Request request, Execution execution) {
List<FutureResponse> futureResponses=new ArrayList<>(chains.size());
for (Chain<? extends Processor> chain : chains) {
futureResponses.add(new AsyncExecution(chain,execution).process(request));
}
Response response=execution.process(request);
AsyncExecution.waitForAll(futureResponses,1000);
for (FutureResponse futureResponse : futureResponses) {
Response federatedResponse=futureResponse.get();
response.data().add(federatedResponse.data());
response.mergeWith(federatedResponse);
}
return response;
}
}
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