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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.config.server.session;
import com.yahoo.component.Version;
import com.yahoo.config.FileReference;
import com.yahoo.config.provision.AllocatedHosts;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.AthenzDomain;
import com.yahoo.config.provision.DockerImage;
import com.yahoo.config.provision.TenantName;
import com.yahoo.transaction.Transaction;
import com.yahoo.vespa.config.server.tenant.TenantRepository;
import java.time.Instant;
import java.util.Optional;
/**
* A session represents an instance of an application that can be edited, prepared and activated. This
* class represents the common stuff between sessions working on the local file
* system ({@link LocalSession}s) and sessions working on zookeeper {@link RemoteSession}s.
*
* @author Ulf Lilleengen
* @author hmusum
*/
public abstract class Session implements Comparable<Session> {
private final long sessionId;
protected final TenantName tenant;
protected final SessionZooKeeperClient sessionZooKeeperClient;
protected Session(TenantName tenant, long sessionId, SessionZooKeeperClient sessionZooKeeperClient) {
this.tenant = tenant;
this.sessionId = sessionId;
this.sessionZooKeeperClient = sessionZooKeeperClient;
}
/**
* Retrieve the session id for this session.
* @return the session id.
*/
public final long getSessionId() {
return sessionId;
}
public Session.Status getStatus() {
return sessionZooKeeperClient.readStatus();
}
@Override
public String toString() {
return "Session,id=" + sessionId;
}
/**
* Represents the status of this session.
*/
public enum Status {
NEW, PREPARE, ACTIVATE, DEACTIVATE, DELETE, NONE;
public static Status parse(String data) {
for (Status status : Status.values()) {
if (status.name().equals(data)) {
return status;
}
}
return Status.NEW;
}
}
public TenantName getTenantName() { return tenant; }
/**
* Helper to provide a log message preamble for code dealing with sessions
* @return log preamble
*/
public String logPre() {
if (getApplicationId().equals(ApplicationId.defaultId())) {
return TenantRepository.logPre(getTenantName());
} else {
return TenantRepository.logPre(getApplicationId());
}
}
public Instant getCreateTime() {
return sessionZooKeeperClient.readCreateTime();
}
public void setApplicationId(ApplicationId applicationId) {
sessionZooKeeperClient.writeApplicationId(applicationId);
}
void setApplicationPackageReference(FileReference applicationPackageReference) {
if (applicationPackageReference == null) throw new IllegalArgumentException(String.format(
"Null application package FileReference for tenant: %s, session: %d", tenant, sessionId));
sessionZooKeeperClient.writeApplicationPackageReference(applicationPackageReference);
}
public void setVespaVersion(Version version) {
sessionZooKeeperClient.writeVespaVersion(version);
}
public void setDockerImageRepository(Optional<DockerImage> dockerImageRepository) {
sessionZooKeeperClient.writeDockerImageRepository(dockerImageRepository);
}
public void setAthenzDomain(Optional<AthenzDomain> athenzDomain) {
sessionZooKeeperClient.writeAthenzDomain(athenzDomain);
}
public ApplicationId getApplicationId() { return sessionZooKeeperClient.readApplicationId(); }
public FileReference getApplicationPackageReference() {return sessionZooKeeperClient.readApplicationPackageReference(); }
public Optional<DockerImage> getDockerImageRepository() { return sessionZooKeeperClient.readDockerImageRepository(); }
public Version getVespaVersion() { return sessionZooKeeperClient.readVespaVersion(); }
public Optional<AthenzDomain> getAthenzDomain() { return sessionZooKeeperClient.readAthenzDomain(); }
public AllocatedHosts getAllocatedHosts() {
return sessionZooKeeperClient.getAllocatedHosts();
}
public Transaction createDeactivateTransaction() {
return createSetStatusTransaction(Status.DEACTIVATE);
}
private Transaction createSetStatusTransaction(Status status) {
return sessionZooKeeperClient.createWriteStatusTransaction(status);
}
// Note: Assumes monotonically increasing session ids
public boolean isNewerThan(long sessionId) { return getSessionId() > sessionId; }
@Override
public int compareTo(Session rhs) {
Long lhsId = getSessionId();
Long rhsId = rhs.getSessionId();
return lhsId.compareTo(rhsId);
}
}
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