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// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.service.model;
import com.yahoo.config.model.api.ApplicationInfo;
import com.yahoo.config.model.api.HostInfo;
import com.yahoo.config.model.api.ServiceInfo;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.Zone;
import com.yahoo.vespa.applicationmodel.ApplicationInstance;
import com.yahoo.vespa.applicationmodel.ApplicationInstanceId;
import com.yahoo.vespa.applicationmodel.ClusterId;
import com.yahoo.vespa.applicationmodel.ConfigId;
import com.yahoo.vespa.applicationmodel.HostName;
import com.yahoo.vespa.applicationmodel.ServiceCluster;
import com.yahoo.vespa.applicationmodel.ServiceClusterKey;
import com.yahoo.vespa.applicationmodel.ServiceInstance;
import com.yahoo.vespa.applicationmodel.ServiceStatusInfo;
import com.yahoo.vespa.applicationmodel.ServiceType;
import com.yahoo.vespa.applicationmodel.TenantId;
import com.yahoo.vespa.service.duper.ConfigServerApplication;
import com.yahoo.vespa.service.monitor.ServiceId;
import com.yahoo.vespa.service.monitor.ServiceStatusProvider;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
/**
* Class to generate an ApplicationInstance given service status for a standard (deployed) application.
*
* @author hakon
*/
public class ApplicationInstanceGenerator {
public static final String CLUSTER_ID_PROPERTY_NAME = "clustername";
private final ApplicationInfo applicationInfo;
private final Zone zone;
private ApplicationId configServerApplicationId;
public ApplicationInstanceGenerator(ApplicationInfo applicationInfo, Zone zone) {
this.applicationInfo = applicationInfo;
this.zone = zone;
// This is cheating a bit, but we don't expect DuperModel's config server application ID to be different.
// We do this to avoid passing through the ID through multiple levels.
this.configServerApplicationId = new ConfigServerApplication().getApplicationId();
}
public ApplicationInstance makeApplicationInstance(ServiceStatusProvider serviceStatusProvider) {
Map<ServiceClusterKey, Set<ServiceInstance>> groupedServiceInstances = new HashMap<>();
for (HostInfo host : applicationInfo.getModel().getHosts()) {
HostName hostName = new HostName(host.getHostname());
for (ServiceInfo serviceInfo : host.getServices()) {
ServiceClusterKey serviceClusterKey = toServiceClusterKey(serviceInfo);
ServiceInstance serviceInstance =
toServiceInstance(
applicationInfo.getApplicationId(),
serviceClusterKey.clusterId(),
serviceInfo,
hostName,
serviceStatusProvider);
if (!groupedServiceInstances.containsKey(serviceClusterKey)) {
groupedServiceInstances.put(serviceClusterKey, new HashSet<>());
}
groupedServiceInstances.get(serviceClusterKey).add(serviceInstance);
}
}
Set<ServiceCluster> serviceClusters = groupedServiceInstances.entrySet().stream()
.map(entry -> new ServiceCluster(
entry.getKey().clusterId(),
entry.getKey().serviceType(),
entry.getValue()))
.collect(Collectors.toSet());
ApplicationInstance applicationInstance = new ApplicationInstance(
new TenantId(applicationInfo.getApplicationId().tenant().toString()),
toApplicationInstanceId(applicationInfo, zone),
serviceClusters);
// Fill back-references
for (ServiceCluster serviceCluster : applicationInstance.serviceClusters()) {
serviceCluster.setApplicationInstance(applicationInstance);
for (ServiceInstance serviceInstance : serviceCluster.serviceInstances()) {
serviceInstance.setServiceCluster(serviceCluster);
}
}
return applicationInstance;
}
private ServiceInstance toServiceInstance(
ApplicationId applicationId,
ClusterId clusterId,
ServiceInfo serviceInfo,
HostName hostName,
ServiceStatusProvider serviceStatusProvider) {
ConfigId configId = toConfigId(serviceInfo);
ServiceType serviceType = toServiceType(serviceInfo);
ServiceStatusInfo status = serviceStatusProvider.getStatus(applicationId, clusterId, serviceType, configId);
return new ServiceInstance(configId, hostName, status);
}
private ApplicationInstanceId toApplicationInstanceId(ApplicationInfo applicationInfo, Zone zone) {
if (applicationInfo.getApplicationId().equals(configServerApplicationId)) {
// Removing this historical discrepancy would break orchestration during rollout.
// An alternative may be to use a feature flag and flip it between releases,
// once that's available.
return new ApplicationInstanceId(applicationInfo.getApplicationId().application().value());
} else {
return new ApplicationInstanceId(String.format("%s:%s:%s:%s",
applicationInfo.getApplicationId().application().value(),
zone.environment().value(),
zone.region().value(),
applicationInfo.getApplicationId().instance().value()));
}
}
public static ServiceId getServiceId(ApplicationInfo applicationInfo, ServiceInfo serviceInfo) {
return new ServiceId(
applicationInfo.getApplicationId(),
getClusterId(serviceInfo),
toServiceType(serviceInfo),
toConfigId(serviceInfo));
}
public static ClusterId getClusterId(ServiceInfo serviceInfo) {
return new ClusterId(serviceInfo.getProperty(CLUSTER_ID_PROPERTY_NAME).orElse(""));
}
private static ServiceClusterKey toServiceClusterKey(ServiceInfo serviceInfo) {
ClusterId clusterId = getClusterId(serviceInfo);
ServiceType serviceType = toServiceType(serviceInfo);
return new ServiceClusterKey(clusterId, serviceType);
}
public static ServiceType toServiceType(ServiceInfo serviceInfo) {
return new ServiceType(serviceInfo.getServiceType());
}
private static ConfigId toConfigId(ServiceInfo serviceInfo) {
return new ConfigId(serviceInfo.getConfigId());
}
}
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