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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.documentapi.local;
import com.yahoo.document.Document;
import com.yahoo.document.DocumentId;
import com.yahoo.document.DocumentPut;
import com.yahoo.document.DocumentRemove;
import com.yahoo.document.DocumentUpdate;
import com.yahoo.documentapi.AsyncParameters;
import com.yahoo.documentapi.AsyncSession;
import com.yahoo.documentapi.DocumentIdResponse;
import com.yahoo.documentapi.DocumentOperationParameters;
import com.yahoo.documentapi.DocumentResponse;
import com.yahoo.documentapi.DocumentUpdateResponse;
import com.yahoo.documentapi.RemoveResponse;
import com.yahoo.documentapi.Response;
import com.yahoo.documentapi.ResponseHandler;
import com.yahoo.documentapi.Result;
import com.yahoo.documentapi.SyncParameters;
import com.yahoo.documentapi.SyncSession;
import com.yahoo.documentapi.UpdateResponse;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.Phaser;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Function;
import static com.yahoo.documentapi.DocumentOperationParameters.parameters;
import static com.yahoo.documentapi.Result.ResultType.SUCCESS;
/**
* @author bratseth
* @author jonmv
*/
public class LocalAsyncSession implements AsyncSession {
private final BlockingQueue<Response> responses = new LinkedBlockingQueue<>();
private final ResponseHandler handler;
private final SyncSession syncSession;
private final Executor executor = Executors.newCachedThreadPool();
private final AtomicReference<Phaser> phaser;
private final AtomicLong requestId = new AtomicLong(0);
private final AtomicReference<Result.ResultType> result = new AtomicReference<>(SUCCESS);
public LocalAsyncSession(AsyncParameters params, LocalDocumentAccess access) {
this.handler = params.getResponseHandler();
this.syncSession = access.createSyncSession(new SyncParameters.Builder().build());
this.phaser = access.phaser;
}
@Override
public double getCurrentWindowSize() {
return 1000;
}
@Override
public Result put(Document document) {
return put(new DocumentPut(document), parameters());
}
@Override
public Result put(DocumentPut documentPut, DocumentOperationParameters parameters) {
return send(req -> {
try {
syncSession.put(documentPut, parameters);
return new DocumentResponse(req, documentPut.getDocument());
}
catch (Exception e) {
return new DocumentResponse(req, documentPut.getDocument(), e.getMessage(), Response.Outcome.ERROR);
}
},
parameters);
}
@Override
public Result get(DocumentId id) {
return get(id, parameters());
}
@Override
public Result get(DocumentId id, DocumentOperationParameters parameters) {
return send(req -> {
try {
return new DocumentResponse(req, syncSession.get(id, parameters, null));
}
catch (Exception e) {
return new DocumentResponse(req, null, e.getMessage(), Response.Outcome.ERROR);
}
},
parameters);
}
@Override
public Result remove(DocumentId id) {
return remove(id, parameters());
}
@Override
public Result remove(DocumentRemove remove, DocumentOperationParameters parameters) {
return send(req -> {
if (syncSession.remove(remove, parameters)) {
return new RemoveResponse(req, true);
}
else {
return new DocumentIdResponse(req, remove.getId(), "Document not found.", Response.Outcome.NOT_FOUND);
}
},
parameters);
}
@Override
public Result update(DocumentUpdate update) {
return update(update, parameters());
}
@Override
public Result update(DocumentUpdate update, DocumentOperationParameters parameters) {
return send(req -> {
if (syncSession.update(update, parameters)) {
return new UpdateResponse(req, true);
}
else {
return new DocumentUpdateResponse(req, update, "Document not found.", Response.Outcome.NOT_FOUND);
}
},
parameters);
}
@Override
public Response getNext() {
return responses.poll();
}
@Override
public Response getNext(int timeoutMilliseconds) throws InterruptedException {
return responses.poll(timeoutMilliseconds, TimeUnit.MILLISECONDS);
}
@Override
public void destroy() {
// empty
}
/** Sets the result type returned on subsequence operations against this. Only SUCCESS will cause Responses to appear. */
public void setResultType(Result.ResultType resultType) {
this.result.set(resultType);
}
private void addResponse(Response response) {
if (handler != null) {
handler.handleResponse(response);
} else {
responses.add(response);
}
}
private Result send(Function<Long, Response> responses, DocumentOperationParameters parameters) {
Result.ResultType resultType = result.get();
if (resultType != SUCCESS)
return new Result(resultType, Result.toError(resultType));
ResponseHandler responseHandler = parameters.responseHandler().orElse(this::addResponse);
long req = requestId.incrementAndGet();
Phaser synchronizer = phaser.get();
if (synchronizer == null)
responseHandler.handleResponse(responses.apply(req));
else {
synchronizer.register();
executor.execute(() -> {
try {
synchronizer.arriveAndAwaitAdvance();
responseHandler.handleResponse(responses.apply(req));
}
finally {
synchronizer.awaitAdvance(synchronizer.arriveAndDeregister());
}
});
}
return new Result(req);
}
}
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