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// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.feed.client;
import org.apache.hc.client5.http.async.methods.SimpleHttpRequest;
import org.apache.hc.client5.http.async.methods.SimpleHttpResponse;
import org.apache.hc.client5.http.config.RequestConfig;
import org.apache.hc.client5.http.impl.async.CloseableHttpAsyncClient;
import org.apache.hc.client5.http.impl.async.HttpAsyncClientBuilder;
import org.apache.hc.client5.http.impl.nio.PoolingAsyncClientConnectionManagerBuilder;
import org.apache.hc.client5.http.ssl.ClientTlsStrategyBuilder;
import org.apache.hc.core5.concurrent.FutureCallback;
import org.apache.hc.core5.http.ContentType;
import org.apache.hc.core5.http.message.BasicHeader;
import org.apache.hc.core5.http2.config.H2Config;
import org.apache.hc.core5.net.URIBuilder;
import org.apache.hc.core5.pool.PoolConcurrencyPolicy;
import org.apache.hc.core5.reactor.IOReactorConfig;
import org.apache.hc.core5.util.TimeValue;
import org.apache.hc.core5.util.Timeout;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.function.Supplier;
import static java.util.Objects.requireNonNull;
/**
* HTTP implementation of {@link FeedClient}
*
* @author bjorncs
* @author jonmv
*/
class HttpFeedClient implements FeedClient {
private final URI endpoint;
private final Map<String, Supplier<String>> requestHeaders;
private final HttpRequestStrategy requestStrategy;
private final CloseableHttpAsyncClient httpClient;
private final AtomicBoolean closed = new AtomicBoolean();
HttpFeedClient(FeedClientBuilder builder) {
this.endpoint = builder.endpoint;
this.requestHeaders = new HashMap<>(builder.requestHeaders);
this.requestStrategy = new HttpRequestStrategy(builder);
this.httpClient = createHttpClient(builder, requestStrategy);
this.httpClient.start();
}
private static CloseableHttpAsyncClient createHttpClient(FeedClientBuilder builder, HttpRequestStrategy retryStrategy) {
HttpAsyncClientBuilder httpClientBuilder = HttpAsyncClientBuilder.create()
.setUserAgent(String.format("vespa-feed-client/%s", Vespa.VERSION))
.setDefaultHeaders(Collections.singletonList(new BasicHeader("Vespa-Client-Version", Vespa.VERSION)))
.disableCookieManagement()
.disableRedirectHandling()
.disableConnectionState()
.setRetryStrategy(retryStrategy)
.setIOReactorConfig(IOReactorConfig.custom()
.setSoTimeout(Timeout.ofSeconds(10))
.build())
.setDefaultRequestConfig(
RequestConfig.custom()
.setConnectTimeout(Timeout.ofSeconds(10))
.setConnectionRequestTimeout(Timeout.DISABLED)
.setResponseTimeout(Timeout.ofMinutes(5))
.build())
.setH2Config(H2Config.custom()
.setMaxConcurrentStreams(builder.maxStreamsPerConnection)
.setCompressionEnabled(true)
.setPushEnabled(false)
.build());
int maxConnections = builder.maxConnections;
PoolingAsyncClientConnectionManagerBuilder connectionManagerBuilder = PoolingAsyncClientConnectionManagerBuilder.create()
.setConnectionTimeToLive(TimeValue.ofMinutes(10))
.setMaxConnTotal(maxConnections)
.setMaxConnPerRoute(maxConnections)
.setPoolConcurrencyPolicy(PoolConcurrencyPolicy.LAX);
if (builder.sslContext != null) {
ClientTlsStrategyBuilder tlsStrategyBuilder = ClientTlsStrategyBuilder.create()
.setSslContext(builder.sslContext);
if (builder.hostnameVerifier != null) {
tlsStrategyBuilder.setHostnameVerifier(builder.hostnameVerifier);
}
connectionManagerBuilder.setTlsStrategy(tlsStrategyBuilder.build());
}
httpClientBuilder.setConnectionManager(connectionManagerBuilder.build());
return httpClientBuilder.build();
}
@Override
public CompletableFuture<Result> put(DocumentId documentId, String documentJson, OperationParameters params) {
return send("POST", documentId, requireNonNull(documentJson), params);
}
@Override
public CompletableFuture<Result> update(DocumentId documentId, String updateJson, OperationParameters params) {
return send("PUT", documentId, requireNonNull(updateJson), params);
}
@Override
public CompletableFuture<Result> remove(DocumentId documentId, OperationParameters params) {
return send("DELETE", documentId, null, params);
}
@Override
public void close() throws IOException {
if ( ! closed.getAndSet(true))
httpClient.close();
}
private CompletableFuture<Result> send(String method, DocumentId documentId, String operationJson, OperationParameters params) {
SimpleHttpRequest request = new SimpleHttpRequest(method, operationUrl(endpoint, documentId, params));
requestHeaders.forEach((name, value) -> request.setHeader(name, value.get()));
if (operationJson != null)
request.setBody(operationJson, ContentType.APPLICATION_JSON);
return requestStrategy.enqueue(documentId, future -> {
httpClient.execute(request,
new FutureCallback<SimpleHttpResponse>() {
@Override public void completed(SimpleHttpResponse response) { future.complete(response); }
@Override public void failed(Exception ex) { future.completeExceptionally(ex); }
@Override public void cancelled() { future.cancel(false); }
});
}).handle((response, thrown) -> {
if (thrown != null) {
if (requestStrategy.hasFailed()) {
try { close(); }
catch (IOException exception) { throw new UncheckedIOException(exception); }
}
return new Result(Result.Type.failure, documentId, thrown.getMessage(), null);
}
return toResult(response, documentId);
});
}
static Result toResult(SimpleHttpResponse response, DocumentId documentId) {
Result.Type type;
switch (response.getCode()) {
case 200: type = Result.Type.success; break;
case 412: type = Result.Type.conditionNotMet; break;
default: type = Result.Type.failure;
}
Map<String, String> responseJson = null; // TODO: parse JSON.
return new Result(type, documentId, response.getBodyText(), "trace");
}
static List<String> toPath(DocumentId documentId) {
List<String> path = new ArrayList<>();
path.add("document");
path.add("v1");
path.add(documentId.namespace());
path.add(documentId.documentType());
if (documentId.number().isPresent()) {
path.add("number");
path.add(Long.toUnsignedString(documentId.number().getAsLong()));
}
else if (documentId.group().isPresent()) {
path.add("group");
path.add(documentId.group().get());
}
else {
path.add("docid");
}
path.add(documentId.userSpecific());
return path;
}
static URI operationUrl(URI endpoint, DocumentId documentId, OperationParameters params) {
URIBuilder url = new URIBuilder(endpoint);
url.setPathSegments(toPath(documentId));
if (params.createIfNonExistent()) url.addParameter("create", "true");
params.testAndSetCondition().ifPresent(condition -> url.addParameter("condition", condition));
params.timeout().ifPresent(timeout -> url.addParameter("timeout", timeout.toMillis() + "ms"));
params.route().ifPresent(route -> url.addParameter("route", route));
params.tracelevel().ifPresent(tracelevel -> url.addParameter("tracelevel", Integer.toString(tracelevel)));
try {
return url.build();
}
catch (URISyntaxException e) {
throw new IllegalStateException(e);
}
}
}
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