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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.cloud.config.ConfigserverConfig;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.TenantName;
import com.yahoo.text.Utf8;
import com.yahoo.vespa.config.server.ApplicationRepository;
import com.yahoo.vespa.config.server.GlobalComponentRegistry;
import com.yahoo.vespa.config.server.TestComponentRegistry;
import com.yahoo.vespa.config.server.application.OrchestratorMock;
import com.yahoo.vespa.config.server.http.SessionHandlerTest;
import com.yahoo.vespa.config.server.tenant.Tenant;
import com.yahoo.vespa.config.server.tenant.TenantRepository;
import com.yahoo.vespa.config.server.zookeeper.ConfigCurator;
import com.yahoo.vespa.curator.Curator;
import com.yahoo.vespa.curator.mock.MockCurator;
import com.yahoo.vespa.flags.FlagSource;
import com.yahoo.vespa.flags.InMemoryFlagSource;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import java.io.File;
import java.time.Clock;
import java.time.Duration;
import java.time.Instant;
import java.util.function.LongPredicate;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertThat;
/**
* @author Ulf Lilleengen
*/
public class SessionRepositoryTest {
private static final TenantName tenantName = TenantName.defaultName();
private static final ApplicationId applicationId = ApplicationId.from(tenantName.value(), "testApp", "default");
private static final File testApp = new File("src/test/apps/app");
private MockCurator curator;
private TenantRepository tenantRepository;
private ApplicationRepository applicationRepository;
@Rule
public TemporaryFolder temporaryFolder = new TemporaryFolder();
public void setup() throws Exception {
setup(new InMemoryFlagSource());
}
private void setup(FlagSource flagSource) throws Exception {
curator = new MockCurator();
File configserverDbDir = temporaryFolder.newFolder().getAbsoluteFile();
GlobalComponentRegistry globalComponentRegistry = new TestComponentRegistry.Builder()
.curator(curator)
.configServerConfig(new ConfigserverConfig.Builder()
.configServerDBDir(configserverDbDir.getAbsolutePath())
.configDefinitionsDir(temporaryFolder.newFolder().getAbsolutePath())
.fileReferencesDir(temporaryFolder.newFolder().getAbsolutePath())
.sessionLifetime(5)
.build())
.flagSource(flagSource)
.build();
tenantRepository = new TenantRepository(globalComponentRegistry, false);
tenantRepository.addTenant(SessionRepositoryTest.tenantName);
applicationRepository = new ApplicationRepository(tenantRepository,
new SessionHandlerTest.MockProvisioner(),
new OrchestratorMock(),
Clock.systemUTC());
}
@Test
public void require_that_local_sessions_are_created_and_deleted() throws Exception {
setup();
long firstSessionId = deploy();
long secondSessionId = deploy();
SessionRepository sessionRepository = tenantRepository.getTenant(tenantName).getSessionRepository();
assertNotNull(sessionRepository.getLocalSession(firstSessionId));
assertNotNull(sessionRepository.getLocalSession(secondSessionId));
assertNull(sessionRepository.getLocalSession(secondSessionId + 1));
sessionRepository.close();
// All created sessions are deleted
assertNull(sessionRepository.getLocalSession(firstSessionId));
assertNull(sessionRepository.getLocalSession(secondSessionId));
}
@Test
public void require_that_local_sessions_belong_to_a_tenant() throws Exception {
setup();
// tenant is "default"
long firstSessionId = deploy();
long secondSessionId = deploy();
SessionRepository sessionRepository = tenantRepository.getTenant(tenantName).getSessionRepository();
assertNotNull(sessionRepository.getLocalSession(firstSessionId));
assertNotNull(sessionRepository.getLocalSession(secondSessionId));
assertNull(sessionRepository.getLocalSession(secondSessionId + 1));
// tenant is "newTenant"
TenantName newTenant = TenantName.from("newTenant");
tenantRepository.addTenant(newTenant);
long sessionId = deploy(ApplicationId.from(newTenant.value(), "testapp", "default"));
SessionRepository sessionRepository2 = tenantRepository.getTenant(newTenant).getSessionRepository();
assertNotNull(sessionRepository2.getLocalSession(sessionId));
}
@Test
public void testInitialize() throws Exception {
setup();
createSession(10L, false);
createSession(11L, false);
assertRemoteSessionExists(10L);
assertRemoteSessionExists(11L);
}
@Test
public void testSessionStateChange() throws Exception {
setup();
long sessionId = 3L;
createSession(sessionId, true);
assertRemoteSessionStatus(sessionId, Session.Status.NEW);
assertStatusChange(sessionId, Session.Status.PREPARE);
assertStatusChange(sessionId, Session.Status.ACTIVATE);
com.yahoo.path.Path session = TenantRepository.getSessionsPath(tenantName).append("" + sessionId);
curator.delete(session);
assertSessionRemoved(sessionId);
SessionRepository sessionRepository = tenantRepository.getTenant(tenantName).getSessionRepository();
assertNull(sessionRepository.getRemoteSession(sessionId));
}
// If reading a session throws an exception it should be handled and not prevent other applications
// from loading. In this test we just show that we end up with one session in remote session
// repo even if it had bad data (by making getSessionIdForApplication() in FailingTenantApplications
// throw an exception).
@Test
public void testBadApplicationRepoOnActivate() throws Exception {
setup();
long sessionId = 3L;
TenantName mytenant = TenantName.from("mytenant");
curator.set(TenantRepository.getApplicationsPath(mytenant).append("mytenant:appX:default"), new byte[0]); // Invalid data
tenantRepository.addTenant(mytenant);
Tenant tenant = tenantRepository.getTenant(mytenant);
curator.create(TenantRepository.getSessionsPath(mytenant));
SessionRepository sessionRepository = tenant.getSessionRepo();
assertThat(sessionRepository.getRemoteSessions().size(), is(0));
createSession(sessionId, true, mytenant);
assertThat(sessionRepository.getRemoteSessions().size(), is(1));
}
private void createSession(long sessionId, boolean wait) {
createSession(sessionId, wait, tenantName);
}
private void createSession(long sessionId, boolean wait, TenantName tenantName) {
com.yahoo.path.Path sessionsPath = TenantRepository.getSessionsPath(tenantName);
SessionZooKeeperClient zkc = new SessionZooKeeperClient(curator, sessionsPath.append(String.valueOf(sessionId)));
zkc.createNewSession(Instant.now());
if (wait) {
Curator.CompletionWaiter waiter = zkc.getUploadWaiter();
waiter.awaitCompletion(Duration.ofSeconds(120));
}
}
private void assertStatusChange(long sessionId, Session.Status status) throws Exception {
com.yahoo.path.Path statePath = TenantRepository.getSessionsPath(tenantName).append("" + sessionId).append(ConfigCurator.SESSIONSTATE_ZK_SUBPATH);
curator.create(statePath);
curator.framework().setData().forPath(statePath.getAbsolute(), Utf8.toBytes(status.toString()));
assertRemoteSessionStatus(sessionId, status);
}
private void assertSessionRemoved(long sessionId) {
SessionRepository sessionRepository = tenantRepository.getTenant(tenantName).getSessionRepository();
waitFor(p -> sessionRepository.getRemoteSession(sessionId) == null, sessionId);
assertNull(sessionRepository.getRemoteSession(sessionId));
}
private void assertRemoteSessionExists(long sessionId) {
assertRemoteSessionStatus(sessionId, Session.Status.NEW);
}
private void assertRemoteSessionStatus(long sessionId, Session.Status status) {
SessionRepository sessionRepository = tenantRepository.getTenant(tenantName).getSessionRepository();
waitFor(p -> sessionRepository.getRemoteSession(sessionId) != null &&
sessionRepository.getRemoteSession(sessionId).getStatus() == status, sessionId);
assertNotNull(sessionRepository.getRemoteSession(sessionId));
assertThat(sessionRepository.getRemoteSession(sessionId).getStatus(), is(status));
}
private void waitFor(LongPredicate predicate, long sessionId) {
long endTime = System.currentTimeMillis() + 60_000;
boolean ok;
do {
ok = predicate.test(sessionId);
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
} while (System.currentTimeMillis() < endTime && !ok);
}
private long deploy() {
return deploy(applicationId);
}
private long deploy(ApplicationId applicationId) {
applicationRepository.deploy(testApp, new PrepareParams.Builder().applicationId(applicationId).build());
return applicationRepository.getActiveSession(applicationId).getSessionId();
}
}
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