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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.controller.restapi.pricing;
import com.yahoo.collections.Pair;
import com.yahoo.component.annotation.Inject;
import com.yahoo.config.provision.ClusterResources;
import com.yahoo.config.provision.NodeResources;
import com.yahoo.container.jdisc.HttpRequest;
import com.yahoo.container.jdisc.HttpResponse;
import com.yahoo.container.jdisc.ThreadedHttpRequestHandler;
import com.yahoo.restapi.ErrorResponse;
import com.yahoo.restapi.Path;
import com.yahoo.restapi.SlimeJsonResponse;
import com.yahoo.slime.Cursor;
import com.yahoo.slime.Slime;
import com.yahoo.text.Text;
import com.yahoo.vespa.hosted.controller.Controller;
import com.yahoo.vespa.hosted.controller.api.integration.billing.Plan;
import com.yahoo.vespa.hosted.controller.api.integration.pricing.PriceInformation;
import com.yahoo.vespa.hosted.controller.api.integration.pricing.PricingInfo;
import com.yahoo.vespa.hosted.controller.restapi.ErrorResponses;
import com.yahoo.yolean.Exceptions;
import java.math.BigDecimal;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Optional;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import static com.yahoo.jdisc.http.HttpRequest.Method.GET;
import static com.yahoo.restapi.ErrorResponse.methodNotAllowed;
import static com.yahoo.vespa.hosted.controller.api.integration.pricing.PricingInfo.SupportLevel;
import static java.lang.Double.parseDouble;
import static java.lang.Integer.parseInt;
import static java.nio.charset.StandardCharsets.UTF_8;
/**
* API for calculating price information
*
* @author hmusum
*/
@SuppressWarnings("unused") // Handler
public class PricingApiHandler extends ThreadedHttpRequestHandler {
private static final Logger log = Logger.getLogger(PricingApiHandler.class.getName());
private static final BigDecimal SCALED_ZERO = BigDecimal.ZERO.setScale(2);
private final Controller controller;
@Inject
public PricingApiHandler(Context parentCtx, Controller controller) {
super(parentCtx);
this.controller = controller;
}
@Override
public HttpResponse handle(HttpRequest request) {
if (request.getMethod() != GET)
return methodNotAllowed("Method '" + request.getMethod() + "' is not supported");
try {
return handleGET(request);
} catch (IllegalArgumentException e) {
return ErrorResponse.badRequest(Exceptions.toMessageString(e));
} catch (RuntimeException e) {
return ErrorResponses.logThrowing(request, log, e);
}
}
private HttpResponse handleGET(HttpRequest request) {
Path path = new Path(request.getUri());
if (path.matches("/pricing/v1/pricing")) return pricing(request);
return ErrorResponse.notFoundError(Text.format("No '%s' handler at '%s'", request.getMethod(),
request.getUri().getPath()));
}
private HttpResponse pricing(HttpRequest request) {
String rawQuery = request.getUri().getRawQuery();
PriceInformation price = parseQuery(rawQuery);
return response(price);
}
private PriceInformation parseQuery(String rawQuery) {
String[] elements = URLDecoder.decode(rawQuery, UTF_8).split("&");
if (elements.length == 0) throw new IllegalArgumentException("no price information found in query");
var supportLevel = SupportLevel.BASIC;
var enclave = false;
var committedSpend = 0d;
var plan = controller.serviceRegistry().planRegistry().defaultPlan(); // fallback to default plan if not supplied
List<ClusterResources> clusterResources = new ArrayList<>();
for (Pair<String, String> entry : keysAndValues(elements)) {
switch (entry.getFirst()) {
case "committedSpend" -> committedSpend = parseDouble(entry.getSecond());
case "enclave" -> enclave = Boolean.parseBoolean(entry.getSecond());
case "planId" -> plan = plan(entry.getSecond())
.orElseThrow(() -> new IllegalArgumentException("Unknown plan id " + entry.getSecond()));
case "supportLevel" -> supportLevel = SupportLevel.valueOf(entry.getSecond().toUpperCase());
case "resources" -> clusterResources.add(clusterResources(entry.getSecond()));
}
}
if (clusterResources.size() < 1) throw new IllegalArgumentException("No cluster resources found in query");
PricingInfo pricingInfo = new PricingInfo(enclave, supportLevel, committedSpend);
return controller.serviceRegistry().pricingController().price(clusterResources, pricingInfo, plan);
}
private ClusterResources clusterResources(String resourcesString) {
String[] elements = resourcesString.split(",");
if (elements.length == 0)
throw new IllegalArgumentException("nothing found in cluster resources: " + resourcesString);
var nodes = 0;
var vcpu = 0d;
var memoryGb = 0d;
var diskGb = 0d;
var gpuMemoryGb = 0d;
for (var element : keysAndValues(elements)) {
switch (element.getFirst()) {
case "nodes" -> nodes = parseInt(element.getSecond());
case "vcpu" -> vcpu = parseDouble(element.getSecond());
case "memoryGb" -> memoryGb = parseDouble(element.getSecond());
case "diskGb" -> diskGb = parseDouble(element.getSecond());
case "gpuMemoryGb" -> gpuMemoryGb = parseDouble(element.getSecond());
}
}
var nodeResources = new NodeResources(vcpu, memoryGb, diskGb, 0); // 0 bandwidth, not used in price calculation
if (gpuMemoryGb > 0)
nodeResources = nodeResources.with(new NodeResources.GpuResources(1, gpuMemoryGb));
return new ClusterResources(nodes, 1, nodeResources);
}
private List<Pair<String, String>> keysAndValues(String[] elements) {
return Arrays.stream(elements).map(element -> {
var index = element.indexOf("=");
if (index <= 0 ) throw new IllegalArgumentException("Error in query parameter, expected '=' between key and value: " + element);
return new Pair<>(element.substring(0, index), element.substring(index + 1));
})
.collect(Collectors.toList());
}
private Optional<Plan> plan(String element) {
return controller.serviceRegistry().planRegistry().plan(element);
}
private static SlimeJsonResponse response(PriceInformation priceInfo) {
var slime = new Slime();
Cursor cursor = slime.setObject();
var array = cursor.setArray("priceInfo");
addItem(array, "List price", priceInfo.listPrice());
addItem(array, "Enclave discount", priceInfo.enclaveDiscount());
addItem(array, "Volume discount", priceInfo.volumeDiscount());
addItem(array, "Committed spend", priceInfo.committedAmountDiscount());
cursor.setString("totalAmount", priceInfo.totalAmount().toPlainString());
return new SlimeJsonResponse(slime);
}
private static void addItem(Cursor array, String name, BigDecimal amount) {
if (amount.compareTo(BigDecimal.ZERO) != 0) {
var o = array.addObject();
o.setString("description", name);
o.setString("amount", SCALED_ZERO.add(amount).toPlainString());
}
}
}
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