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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.vespa.hosted.controller.restapi.deployment;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.container.jdisc.EmptyResponse;
import com.yahoo.container.jdisc.HttpRequest;
import com.yahoo.container.jdisc.HttpResponse;
import com.yahoo.container.jdisc.ThreadedHttpRequestHandler;
import com.yahoo.jdisc.http.HttpRequest.Method;
import com.yahoo.restapi.ErrorResponse;
import com.yahoo.restapi.Path;
import com.yahoo.text.Text;
import com.yahoo.vespa.hosted.controller.Controller;
import com.yahoo.vespa.hosted.controller.api.integration.deployment.JobId;
import com.yahoo.vespa.hosted.controller.api.integration.deployment.JobType;
import com.yahoo.vespa.hosted.controller.application.TenantAndApplicationId;
import com.yahoo.vespa.hosted.controller.deployment.DeploymentStatus;
import com.yahoo.vespa.hosted.controller.deployment.JobStatus;
import com.yahoo.vespa.hosted.controller.restapi.ErrorResponses;
import com.yahoo.yolean.Exceptions;
import java.io.IOException;
import java.io.OutputStream;
import java.time.Instant;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Predicate;
import java.util.function.Supplier;
import java.util.logging.Logger;
import static java.nio.charset.StandardCharsets.UTF_8;
/**
* This API serves redirects to a badge server.
*
* @author jonmv
*/
@SuppressWarnings("unused") // Handler
public class BadgeApiHandler extends ThreadedHttpRequestHandler {
private final static Logger log = Logger.getLogger(BadgeApiHandler.class.getName());
private final Controller controller;
private final Map<Key, Value> badgeCache = new ConcurrentHashMap<>();
public BadgeApiHandler(Context parentCtx, Controller controller) {
super(parentCtx);
this.controller = controller;
}
@Override
public HttpResponse handle(HttpRequest request) {
Method method = request.getMethod();
try {
return switch (method) {
case OPTIONS -> new SvgHttpResponse("") {{
headers().add("Allow", "GET, HEAD, OPTIONS");
headers().add("Access-Control-Allow-Origin", "*");
headers().add("Access-Control-Allow-Methods", "GET, HEAD, OPTIONS");
}};
case HEAD, GET -> get(request);
default -> ErrorResponse.methodNotAllowed("Method '" + method + "' is unsupported");
};
} catch (IllegalArgumentException|IllegalStateException e) {
return ErrorResponse.badRequest(Exceptions.toMessageString(e));
} catch (RuntimeException e) {
return ErrorResponses.logThrowing(request, log, e);
}
}
private HttpResponse get(HttpRequest request) {
Path path = new Path(request.getUri());
if (path.matches("/badge/v1/{tenant}/{application}/{instance}")) return overviewBadge(path.get("tenant"), path.get("application"), path.get("instance"));
if (path.matches("/badge/v1/{tenant}/{application}/{instance}/{jobName}")) return historyBadge(path.get("tenant"), path.get("application"), path.get("instance"), path.get("jobName"), request.getProperty("historyLength"));
return ErrorResponse.notFoundError(Text.format("No '%s' handler at '%s'", request.getMethod(),
request.getUri().getPath()));
}
/** Returns a URI which points to an overview badge for the given application. */
private HttpResponse overviewBadge(String tenant, String application, String instance) {
ApplicationId id = ApplicationId.from(tenant, application, instance);
return cachedResponse(new Key(id, null, 0),
controller.clock().instant(),
() -> {
DeploymentStatus status = controller.jobController().deploymentStatus(controller.applications().requireApplication(TenantAndApplicationId.from(id)));
Predicate<JobStatus> isDeclaredJob = job -> status.jobSteps().get(job.id()) != null && status.jobSteps().get(job.id()).isDeclared();
return Badges.overviewBadge(id, status.jobs().instance(id.instance()).matching(isDeclaredJob));
});
}
/** Returns a URI which points to a history badge for the given application and job type. */
private HttpResponse historyBadge(String tenant, String application, String instance, String jobName, String historyLength) {
ApplicationId id = ApplicationId.from(tenant, application, instance);
JobType type = JobType.fromJobName(jobName, controller.zoneRegistry());
int length = historyLength == null ? 5 : Math.min(32, Math.max(0, Integer.parseInt(historyLength)));
return cachedResponse(new Key(id, type, length),
controller.clock().instant(),
() -> Badges.historyBadge(id,
controller.jobController().jobStatus(new JobId(id, type)),
length)
);
}
private HttpResponse cachedResponse(Key key, Instant now, Supplier<String> badge) {
return new SvgHttpResponse(badgeCache.compute(key, (__, value) -> {
return value != null && value.expiry.isAfter(now) ? value : new Value(badge.get(), now);
}).badgeSvg);
}
private static class SvgHttpResponse extends HttpResponse {
private final String svg;
SvgHttpResponse(String svg) { super(200); this.svg = svg; }
@Override public void render(OutputStream outputStream) throws IOException {
outputStream.write(svg.getBytes(UTF_8));
}
@Override public String getContentType() {
return "image/svg+xml";
}
}
private static class Key {
private final ApplicationId id;
private final JobType type;
private final int historyLength;
private Key(ApplicationId id, JobType type, int historyLength) {
this.id = id;
this.type = type;
this.historyLength = historyLength;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Key key = (Key) o;
return historyLength == key.historyLength && id.equals(key.id) && Objects.equals(type, key.type);
}
@Override
public int hashCode() {
return Objects.hash(id, type, historyLength);
}
}
private static class Value {
private final String badgeSvg;
private final Instant expiry;
private Value(String badgeSvg, Instant created) {
this.badgeSvg = badgeSvg;
this.expiry = created.plusSeconds(60);
}
}
}
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