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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 static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertThat;
import com.yahoo.config.provision.TenantName;
import com.yahoo.path.Path;
import com.yahoo.text.Utf8;
import com.yahoo.vespa.config.server.MockReloadHandler;
import com.yahoo.vespa.config.server.TestComponentRegistry;
import com.yahoo.vespa.config.server.application.TenantApplications;
import com.yahoo.vespa.config.server.tenant.Tenant;
import com.yahoo.vespa.config.server.tenant.TenantBuilder;
import com.yahoo.vespa.config.server.tenant.TenantRepository;
import com.yahoo.vespa.curator.Curator;
import com.yahoo.vespa.curator.mock.MockCurator;
import org.junit.Before;
import org.junit.Test;
import com.yahoo.vespa.config.server.zookeeper.ConfigCurator;
import java.time.Duration;
import java.util.concurrent.TimeUnit;
import java.util.function.LongPredicate;
/**
* @author Ulf Lilleengen
*/
public class RemoteSessionRepoTest {
private static final TenantName tenantName = TenantName.defaultName();
private RemoteSessionRepo remoteSessionRepo;
private Curator curator;
@Before
public void setupFacade() {
curator = new MockCurator();
Tenant tenant = TenantBuilder.create(new TestComponentRegistry.Builder()
.curator(curator)
.build(),
tenantName)
.build();
this.remoteSessionRepo = tenant.getRemoteSessionRepo();
curator.create(TenantRepository.getTenantPath(tenantName).append("/applications"));
curator.create(TenantRepository.getSessionsPath(tenantName));
createSession(1l, false);
createSession(2l, false);
}
private void createSession(long sessionId, boolean wait) {
createSession(sessionId, wait, tenantName);
}
private void createSession(long sessionId, boolean wait, TenantName tenantName) {
Path sessionsPath = TenantRepository.getSessionsPath(tenantName);
SessionZooKeeperClient zkc = new SessionZooKeeperClient(curator, sessionsPath.append(String.valueOf(sessionId)));
zkc.createNewSession(System.currentTimeMillis(), TimeUnit.MILLISECONDS);
if (wait) {
Curator.CompletionWaiter waiter = zkc.getUploadWaiter();
waiter.awaitCompletion(Duration.ofSeconds(120));
}
}
@Test
public void testInitialize() {
assertSessionExists(1l);
assertSessionExists(2l);
}
@Test
public void testCreateSession() {
createSession(3l, true);
assertSessionExists(3l);
}
@Test
public void testSessionStateChange() throws Exception {
long sessionId = 3L;
createSession(sessionId, true);
assertSessionStatus(sessionId, Session.Status.NEW);
assertStatusChange(sessionId, Session.Status.PREPARE);
assertStatusChange(sessionId, Session.Status.ACTIVATE);
Path session = TenantRepository.getSessionsPath(tenantName).append("" + sessionId);
curator.delete(session);
assertSessionRemoved(sessionId);
assertNull(remoteSessionRepo.getSession(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() {
long sessionId = 3L;
TenantName mytenant = TenantName.from("mytenant");
TenantApplications applicationRepo = TenantApplications.create(curator, new MockReloadHandler(), mytenant);
curator.set(TenantRepository.getApplicationsPath(mytenant).append("mytenant:appX:default"), new byte[0]); // Invalid data
Tenant tenant = TenantBuilder.create(new TestComponentRegistry.Builder().curator(curator).build(), mytenant)
.withApplicationRepo(applicationRepo)
.build();
curator.create(TenantRepository.getSessionsPath(mytenant));
remoteSessionRepo = tenant.getRemoteSessionRepo();
assertThat(remoteSessionRepo.listSessions().size(), is(0));
createSession(sessionId, true, mytenant);
assertThat(remoteSessionRepo.listSessions().size(), is(1));
}
private void assertStatusChange(long sessionId, Session.Status status) throws Exception {
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()));
System.out.println("Setting status " + status + " for " + sessionId);
assertSessionStatus(sessionId, status);
}
private void assertSessionRemoved(long sessionId) {
waitFor(p -> remoteSessionRepo.getSession(sessionId) == null, sessionId);
assertNull(remoteSessionRepo.getSession(sessionId));
}
private void assertSessionExists(long sessionId) {
assertSessionStatus(sessionId, Session.Status.NEW);
}
private void assertSessionStatus(long sessionId, Session.Status status) {
waitFor(p -> remoteSessionRepo.getSession(sessionId) != null &&
remoteSessionRepo.getSession(sessionId).getStatus() == status, sessionId);
assertNotNull(remoteSessionRepo.getSession(sessionId));
assertThat(remoteSessionRepo.getSession(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);
}
}
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