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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.feed.client.examples;
import ai.vespa.feed.client.DocumentId;
import ai.vespa.feed.client.FeedClient;
import ai.vespa.feed.client.FeedClientBuilder;
import ai.vespa.feed.client.FeedException;
import ai.vespa.feed.client.JsonFeeder;
import ai.vespa.feed.client.Result;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.time.Duration;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.logging.Logger;
/**
* Sample feeder demonstrating how to programmatically feed to a Vespa cluster.
*/
class JsonFileFeederExample implements Closeable {
private final static Logger log = Logger.getLogger(JsonFileFeederExample.class.getName());
private final JsonFeeder jsonFeeder;
private final URI endpoint;
static class ResultCallBack implements JsonFeeder.ResultCallback {
final AtomicInteger resultsReceived = new AtomicInteger(0);
final AtomicInteger errorsReceived = new AtomicInteger(0);
final long startTimeMillis = System.currentTimeMillis();;
@Override
public void onNextResult(Result result, FeedException error) {
resultsReceived.incrementAndGet();
if (error != null) {
log.warning("Problems with feeding document "
+ error.documentId().map(DocumentId::toString).orElse("<unknown>")
+ ": " + error);
errorsReceived.incrementAndGet();
}
}
@Override
public void onError(FeedException error) {
log.severe("Feeding failed fatally: " + error.getMessage());
}
@Override
public void onComplete() {
log.info("Feeding completed");
}
void dumpStatsToLog() {
log.info("Received in total " + resultsReceived.get() + ", " + errorsReceived.get() + " errors.");
log.info("Time spent receiving is " + (System.currentTimeMillis() - startTimeMillis) + " ms.");
}
}
JsonFileFeederExample(URI endpoint) {
this.endpoint = endpoint;
FeedClient feedClient = FeedClientBuilder.create(endpoint)
.build();
this.jsonFeeder = JsonFeeder.builder(feedClient)
.withTimeout(Duration.ofSeconds(30))
.build();
}
/**
* Feed all operations from a stream.
*
* @param stream The input stream to read operations from (JSON array containing one or more document operations).
*/
void batchFeed(InputStream stream, String batchId) {
ResultCallBack callback = new ResultCallBack();
log.info("Starting feed to " + endpoint + " for batch '" + batchId + "'");
CompletableFuture<Void> promise = jsonFeeder.feedMany(stream, callback);
promise.join(); // wait for feeding to complete
callback.dumpStatsToLog();
}
@Override
public void close() throws IOException {
jsonFeeder.close();
}
}
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