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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.vespa.http.client.core.api;
import com.yahoo.vespa.http.client.FeedClient;
import com.yahoo.vespa.http.client.config.SessionParams;
import com.yahoo.vespa.http.client.core.Document;
import com.yahoo.vespa.http.client.core.ThrottlePolicy;
import com.yahoo.vespa.http.client.core.operationProcessor.IncompleteResultsThrottler;
import com.yahoo.vespa.http.client.core.operationProcessor.OperationProcessor;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CodingErrorAction;
import java.nio.charset.StandardCharsets;
import java.time.Instant;
import java.util.Optional;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* Implementation of FeedClient. It is a thin layer on top of multiClusterHandler and multiClusterResultAggregator.
*
* @author dybis
*/
public class FeedClientImpl implements FeedClient {
private final OperationProcessor operationProcessor;
private final long closeTimeoutMs;
private final long sleepTimeMs = 500;
public FeedClientImpl(SessionParams sessionParams,
ResultCallback resultCallback,
ScheduledThreadPoolExecutor timeoutExecutor) {
this.closeTimeoutMs = (10 + 3 * sessionParams.getConnectionParams().getMaxRetries()) * (
sessionParams.getFeedParams().getServerTimeout(TimeUnit.MILLISECONDS) +
sessionParams.getFeedParams().getClientTimeout(TimeUnit.MILLISECONDS));
this.operationProcessor = new OperationProcessor(
new IncompleteResultsThrottler(
sessionParams.getThrottlerMinSize(),
sessionParams.getClientQueueSize(),
()->System.currentTimeMillis(),
new ThrottlePolicy()),
resultCallback,
sessionParams,
timeoutExecutor);
}
@Override
public void stream(String documentId, String operationId, CharSequence documentData, Object context) {
CharsetEncoder charsetEncoder = StandardCharsets.UTF_8.newEncoder();
charsetEncoder.onMalformedInput(CodingErrorAction.REPORT);
charsetEncoder.onUnmappableCharacter(CodingErrorAction.REPORT);
Document document = new Document(documentId, operationId, documentData, context);
operationProcessor.sendDocument(document);
}
@Override
public void close() {
Instant lastOldestResultReceivedAt = Instant.now();
Optional<String> oldestIncompleteId = operationProcessor.oldestIncompleteResultId();
while (oldestIncompleteId.isPresent() && waitForOperations(lastOldestResultReceivedAt, sleepTimeMs, closeTimeoutMs)) {
Optional<String> oldestIncompleteIdNow = operationProcessor.oldestIncompleteResultId();
if ( ! oldestIncompleteId.equals(oldestIncompleteIdNow))
lastOldestResultReceivedAt = Instant.now();
oldestIncompleteId = oldestIncompleteIdNow;
}
operationProcessor.close();
}
@Override
public String getStatsAsJson() {
return operationProcessor.getStatsAsJson();
}
// On return value true, wait more. Public for testing.
public static boolean waitForOperations(Instant lastResultReceived, long sleepTimeMs, long closeTimeoutMs) {
if (lastResultReceived.plusMillis(closeTimeoutMs).isBefore(Instant.now())) {
return false;
}
try {
Thread.sleep(sleepTimeMs);
} catch (InterruptedException e) {
return false;
}
return true;
}
}
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