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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.dispatch;
import com.yahoo.compress.CompressionType;
import com.yahoo.prelude.fastsearch.FastHit;
import java.util.List;
import java.util.Optional;
/**
* A dispatch client.
*
* @author bratseth
*/
interface Client {
void getDocsums(List<FastHit> hits, NodeConnection node, CompressionType compression,
int uncompressedLength, byte[] compressedSlime, RpcFillInvoker.GetDocsumsResponseReceiver responseReceiver,
double timeoutSeconds);
/** Creates a connection to a particular node in this */
NodeConnection createConnection(String hostname, int port);
class GetDocsumsResponseOrError {
// One of these will be non empty and the other not
private Optional<GetDocsumsResponse> response;
private Optional<String> error;
public static GetDocsumsResponseOrError fromResponse(GetDocsumsResponse response) {
return new GetDocsumsResponseOrError(Optional.of(response), Optional.empty());
}
public static GetDocsumsResponseOrError fromError(String error) {
return new GetDocsumsResponseOrError(Optional.empty(), Optional.of(error));
}
private GetDocsumsResponseOrError(Optional<GetDocsumsResponse> response, Optional<String> error) {
this.response = response;
this.error = error;
}
/** Returns the response, or empty if there is an error */
public Optional<GetDocsumsResponse> response() { return response; }
/** Returns the error or empty if there is a response */
public Optional<String> error() { return error; }
}
class GetDocsumsResponse {
private final byte compression;
private final int uncompressedSize;
private final byte[] compressedSlimeBytes;
private final List<FastHit> hitsContext;
public GetDocsumsResponse(byte compression, int uncompressedSize, byte[] compressedSlimeBytes, List<FastHit> hitsContext) {
this.compression = compression;
this.uncompressedSize = uncompressedSize;
this.compressedSlimeBytes = compressedSlimeBytes;
this.hitsContext = hitsContext;
}
public byte compression() {
return compression;
}
public int uncompressedSize() {
return uncompressedSize;
}
public byte[] compressedSlimeBytes() {
return compressedSlimeBytes;
}
public List<FastHit> hitsContext() {
return hitsContext;
}
}
interface NodeConnection {
/** Closes this connection */
void close();
}
}
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