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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.config.application.api.ApplicationPackage;
import com.yahoo.config.provision.TenantName;
import com.yahoo.transaction.Transaction;
import com.yahoo.vespa.config.server.application.TenantApplications;
import static com.yahoo.vespa.curator.Curator.CompletionWaiter;
/**
* A LocalSession is a session that has been created locally on this configserver. A local session can be edited and
* prepared. Deleting a local session will ensure that the local filesystem state and global zookeeper state is
* cleaned for this session.
*
* @author Ulf Lilleengen
*/
// This is really the store of an application, whether it is active or in an edit session
// TODO: Separate the "application store" and "session" aspects - the latter belongs in the HTTP layer -bratseth
public class LocalSession extends Session {
private final TenantApplications applicationRepo;
/**
* Creates a session. This involves loading the application, validating it and distributing it.
*
* @param sessionId The session id for this session.
*/
public LocalSession(TenantName tenant, long sessionId, ApplicationPackage applicationPackage,
SessionZooKeeperClient sessionZooKeeperClient, TenantApplications applicationRepo) {
super(tenant, sessionId, sessionZooKeeperClient, applicationPackage);
this.applicationRepo = applicationRepo;
}
void setPrepared() {
setStatus(Session.Status.PREPARE);
}
private Transaction createSetStatusTransaction(Status status) {
return sessionZooKeeperClient.createWriteStatusTransaction(status);
}
public CompletionWaiter createActiveWaiter() {
return sessionZooKeeperClient.createActiveWaiter();
}
public Transaction createActivateTransaction() {
Transaction transaction = createSetStatusTransaction(Status.ACTIVATE);
transaction.add(applicationRepo.createPutTransaction(sessionZooKeeperClient.readApplicationId(), getSessionId()).operations());
return transaction;
}
public long getActiveSessionAtCreate() {
return getMetaData().getPreviousActiveGeneration();
}
public enum Mode {
READ, WRITE
}
}
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