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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.config.server.application;
import com.yahoo.component.AbstractComponent;
import com.yahoo.concurrent.DaemonThreadFactory;
import com.yahoo.config.model.api.PortInfo;
import com.yahoo.config.model.api.ServiceInfo;
import com.yahoo.jrt.Request;
import com.yahoo.jrt.Spec;
import com.yahoo.jrt.Supervisor;
import com.yahoo.jrt.Target;
import com.yahoo.jrt.Transport;
import java.util.logging.Level;
import com.yahoo.slime.Cursor;
import com.yahoo.vespa.config.server.http.JSONResponse;
import java.time.Duration;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.logging.Logger;
/**
* File distribution status for each host in the application
*
* @author hmusum
*/
public class FileDistributionStatus extends AbstractComponent {
private static final Logger log = Logger.getLogger(FileDistributionStatus.class.getName());
enum Status {UNKNOWN, FINISHED, IN_PROGRESS}
private final ExecutorService rpcExecutor = Executors.newCachedThreadPool(new DaemonThreadFactory("filedistribution status"));
private final Supervisor supervisor = new Supervisor(new Transport("filedistribution-status"));
public StatusAllHosts status(Application application, Duration timeout) {
List<HostStatus> hostStatuses = new ArrayList<>();
List <Future<HostStatus>> results = new ArrayList<>();
application.getModel().getHosts()
.forEach(host -> host.getServices()
.stream()
.filter(service -> "configproxy".equals(service.getServiceType()))
.forEach(service -> {
results.add(rpcExecutor.submit(() -> getHostStatus(service.getHostName(), getRpcPort(service), timeout)));
}));
// wait for all
results.forEach(future -> {
try {
hostStatuses.add(future.get());
} catch (InterruptedException | ExecutionException e) {
log.log(Level.WARNING, "Failed getting file distribution status", e);
}
});
return createStatusForAllHosts(hostStatuses);
}
HostStatus getHostStatus(String hostname, int port, Duration timeout) {
Target target = supervisor.connect(new Spec(hostname, port));
Request request = new Request("filedistribution.getActiveFileReferencesStatus");
target.invokeSync(request, timeout);
HostStatus hostStatus = createHostStatusFromResponse(hostname, request);
target.close();
return hostStatus;
}
private HostStatus createHostStatusFromResponse(String hostname, Request request) {
if (request.isError()) {
return new HostStatus(hostname,
Status.UNKNOWN,
Collections.emptyMap(),
"error: " + request.errorMessage() + "(" + request.errorCode() + ")");
} else {
Map<String, Double> fileReferenceStatuses = new HashMap<>();
String[] fileReferences = request.returnValues().get(0).asStringArray();
double[] downloadStatus = request.returnValues().get(1).asDoubleArray();
boolean allDownloaded = true;
for (int i = 0; i < fileReferences.length; i++) {
fileReferenceStatuses.put(fileReferences[i], downloadStatus[i]);
if (downloadStatus[i] < 1.0) {
allDownloaded = false;
}
}
return new HostStatus(hostname, allDownloaded ? Status.FINISHED : Status.IN_PROGRESS, fileReferenceStatuses, "");
}
}
private StatusAllHosts createStatusForAllHosts(List<HostStatus> hostStatuses) {
int countUnknown = 0;
int countInProgress = 0;
int countFinished = 0;
for (HostStatus hostStatus : hostStatuses) {
switch (hostStatus.status) {
case IN_PROGRESS -> countInProgress++;
case FINISHED -> countFinished++;
case UNKNOWN -> countUnknown++;
}
}
if (countInProgress == 0 && countUnknown == 0)
return new StatusAllHosts(Status.FINISHED, hostStatuses);
else if (countInProgress == 0 && countFinished == 0)
return new StatusAllHosts(Status.UNKNOWN, hostStatuses);
else
return new StatusAllHosts(Status.IN_PROGRESS, hostStatuses);
}
private static Integer getRpcPort(ServiceInfo service) {
return service.getPorts().stream()
.filter(port -> port.getTags().contains("rpc"))
.map(PortInfo::getPort)
.findFirst()
.orElseThrow(() -> new RuntimeException("Could not find rpc port for " + service.getServiceType() + " on " + service.getHostName()));
}
private static class StatusAllHosts extends JSONResponse {
private StatusAllHosts(Status status, List<HostStatus> hostStatuses) {
super(200);
Cursor hostsArray = object.setArray("hosts");
for (HostStatus hostStatus : hostStatuses) {
Cursor host = hostsArray.addObject();
host.setString("hostname", hostStatus.hostname);
host.setString("status", hostStatus.status.name());
hostStatus.errorMessage.ifPresent(message -> host.setString("message", message));
Cursor fileReferences = host.setArray("fileReferences");
hostStatus.fileReferenceStatuses.forEach((key, value) -> fileReferences.addObject().setDouble(key, value));
}
object.setString("status", status.name());
}
}
@Override
public void deconstruct() {
rpcExecutor.shutdownNow();
}
static class HostStatus {
private final String hostname;
private final Status status;
private final Map<String, Double> fileReferenceStatuses;
private final Optional<String> errorMessage;
HostStatus(String hostname, Status status, Map<String, Double> fileReferenceStatuses) {
this.hostname = hostname;
this.status = status;
this.fileReferenceStatuses = fileReferenceStatuses;
this.errorMessage = Optional.empty();
}
HostStatus(String hostname, Status status, Map<String, Double> fileReferenceStatuses, String errorMessage) {
this.hostname = hostname;
this.status = status;
this.fileReferenceStatuses = fileReferenceStatuses;
this.errorMessage = Optional.of(errorMessage);
}
public String hostname() {
return hostname;
}
@Override
public String toString() {
return hostname + ": " + status + ", " + fileReferenceStatuses + " " + errorMessage.orElse("");
}
}
}
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