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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.persistence;
import com.yahoo.config.provision.ApplicationName;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.config.provision.InstanceName;
import com.yahoo.config.provision.TenantName;
import com.yahoo.config.provision.zone.ZoneId;
import com.yahoo.slime.Cursor;
import com.yahoo.slime.Inspector;
import com.yahoo.slime.Slime;
import com.yahoo.slime.SlimeUtils;
import com.yahoo.vespa.hosted.controller.api.integration.deployment.JobType;
import com.yahoo.vespa.hosted.controller.notification.Notification;
import com.yahoo.vespa.hosted.controller.notification.NotificationSource;
import java.util.List;
/**
* (de)serializes notifications for a tenant
*
* @author freva
*/
public class NotificationsSerializer {
// WARNING: Since there are multiple servers in a ZooKeeper cluster and they upgrade one by one
// (and rewrite all nodes on startup), changes to the serialized format must be made
// such that what is serialized on version N+1 can be read by version N:
// - ADDING FIELDS: Always ok
// - REMOVING FIELDS: Stop reading the field first. Stop writing it on a later version.
// - CHANGING THE FORMAT OF A FIELD: Don't do it bro.
private static final String notificationsFieldName = "notifications";
private static final String atFieldName = "at";
private static final String typeField = "type";
private static final String levelField = "level";
private static final String messagesField = "messages";
private static final String applicationField = "application";
private static final String instanceField = "instance";
private static final String zoneField = "zone";
private static final String clusterIdField = "clusterId";
private static final String jobTypeField = "jobId";
private static final String runNumberField = "runNumber";
public Slime toSlime(List<Notification> notifications) {
Slime slime = new Slime();
Cursor notificationsArray = slime.setObject().setArray(notificationsFieldName);
for (Notification notification : notifications) {
Cursor notificationObject = notificationsArray.addObject();
notificationObject.setLong(atFieldName, notification.at().toEpochMilli());
notificationObject.setString(typeField, asString(notification.type()));
notificationObject.setString(levelField, asString(notification.level()));
Cursor messagesArray = notificationObject.setArray(messagesField);
notification.messages().forEach(messagesArray::addString);
notification.source().application().ifPresent(application -> notificationObject.setString(applicationField, application.value()));
notification.source().instance().ifPresent(instance -> notificationObject.setString(instanceField, instance.value()));
notification.source().zoneId().ifPresent(zoneId -> notificationObject.setString(zoneField, zoneId.value()));
notification.source().clusterId().ifPresent(clusterId -> notificationObject.setString(clusterIdField, clusterId.value()));
notification.source().jobType().ifPresent(jobType -> notificationObject.setString(jobTypeField, jobType.serialized()));
notification.source().runNumber().ifPresent(runNumber -> notificationObject.setLong(runNumberField, runNumber));
}
return slime;
}
public List<Notification> fromSlime(TenantName tenantName, Slime slime) {
return SlimeUtils.entriesStream(slime.get().field(notificationsFieldName))
.filter(inspector -> { // TODO: remove in summer.
if (!inspector.field(jobTypeField).valid()) return true;
try {
JobType.ofSerialized(inspector.field(jobTypeField).asString());
return true;
} catch (RuntimeException e) {
return false;
}
})
.map(inspector -> fromInspector(tenantName, inspector)).toList();
}
private Notification fromInspector(TenantName tenantName, Inspector inspector) {
return new Notification(
SlimeUtils.instant(inspector.field(atFieldName)),
typeFrom(inspector.field(typeField)),
levelFrom(inspector.field(levelField)),
new NotificationSource(
tenantName,
SlimeUtils.optionalString(inspector.field(applicationField)).map(ApplicationName::from),
SlimeUtils.optionalString(inspector.field(instanceField)).map(InstanceName::from),
SlimeUtils.optionalString(inspector.field(zoneField)).map(ZoneId::from),
SlimeUtils.optionalString(inspector.field(clusterIdField)).map(ClusterSpec.Id::from),
SlimeUtils.optionalString(inspector.field(jobTypeField)).map(jobName -> JobType.ofSerialized(jobName)),
SlimeUtils.optionalLong(inspector.field(runNumberField))),
SlimeUtils.entriesStream(inspector.field(messagesField)).map(Inspector::asString).toList());
}
private static String asString(Notification.Type type) {
return switch (type) {
case applicationPackage -> "applicationPackage";
case submission -> "submission";
case testPackage -> "testPackage";
case deployment -> "deployment";
case feedBlock -> "feedBlock";
case reindex -> "reindex";
};
}
private static Notification.Type typeFrom(Inspector field) {
return switch (field.asString()) {
case "applicationPackage" -> Notification.Type.applicationPackage;
case "submission" -> Notification.Type.submission;
case "testPackage" -> Notification.Type.testPackage;
case "deployment" -> Notification.Type.deployment;
case "feedBlock" -> Notification.Type.feedBlock;
case "reindex" -> Notification.Type.reindex;
default -> throw new IllegalArgumentException("Unknown serialized notification type value '" + field.asString() + "'");
};
}
private static String asString(Notification.Level level) {
return switch (level) {
case info -> "info";
case warning -> "warning";
case error -> "error";
};
}
private static Notification.Level levelFrom(Inspector field) {
return switch (field.asString()) {
case "info" -> Notification.Level.info;
case "warning" -> Notification.Level.warning;
case "error" -> Notification.Level.error;
default -> throw new IllegalArgumentException("Unknown serialized notification level value '" + field.asString() + "'");
};
}
}
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