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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.hosted.provision.applications;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.ApplicationLockException;
import com.yahoo.config.provision.ApplicationTransaction;
import com.yahoo.config.provision.ApplicationMutex;
import com.yahoo.transaction.Mutex;
import com.yahoo.transaction.NestedTransaction;
import com.yahoo.vespa.hosted.provision.persistence.CuratorDb;
import java.time.Duration;
import java.util.List;
import java.util.Optional;
/**
* An (in-memory, for now) repository of the node repo's view of applications.
*
* This is multithread safe.
*
* @author bratseth
*/
public class Applications {
private final CuratorDb db;
public Applications(CuratorDb db) {
this.db = db;
// read and write all to make sure they are stored in the latest version of the serialized format
for (ApplicationId id : ids()) {
try (Mutex lock = db.lock(id)) {
get(id).ifPresent(application -> put(application, lock));
} catch (ApplicationLockException e) {
throw new ApplicationLockException(e);
}
}
}
/** Returns the ids of all applications */
public List<ApplicationId> ids() { return db.readApplicationIds(); }
/** Returns the application with the given id, or empty if it does not exist */
public Optional<Application> get(ApplicationId id) {
return db.readApplication(id);
}
/** Returns the application with the given id, or throws IllegalArgumentException if it does not exist */
public Application require(ApplicationId id) {
return db.readApplication(id).orElseThrow(() -> new IllegalArgumentException("No application '" + id + "' was found"));
}
// TODO: Require ProvisionLock instead of Mutex
public void put(Application application, Mutex applicationLock) {
NestedTransaction transaction = new NestedTransaction();
db.writeApplication(application, transaction);
transaction.commit();
}
public void put(Application application, ApplicationTransaction transaction) {
db.writeApplication(application, transaction.nested());
}
public void remove(ApplicationTransaction transaction) {
db.deleteApplication(transaction);
}
/** Create a lock which provides exclusive rights to making changes to the given application */
public ApplicationMutex lock(ApplicationId application) {
return new ApplicationMutex(application, db.lock(application));
}
/** Create a lock with a timeout which provides exclusive rights to making changes to the given application */
public ApplicationMutex lock(ApplicationId application, Duration timeout) {
return new ApplicationMutex(application, db.lock(application, timeout));
}
/** Create a lock which provides exclusive rights to perform a maintenance deployment */
public ApplicationMutex lockMaintenance(ApplicationId application) {
return new ApplicationMutex(application, db.lockMaintenance(application));
}
}
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