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Example 1 with LastCommittedIndexFinder

use of org.neo4j.causalclustering.core.state.machines.tx.LastCommittedIndexFinder in project neo4j by neo4j.

the class CoreBootstrapperTest method shouldSetAllCoreState.

@Test
public void shouldSetAllCoreState() throws Exception {
    // given
    int nodeCount = 100;
    FileSystemAbstraction fileSystem = fileSystemRule.get();
    File classicNeo4jStore = RestoreClusterUtils.createClassicNeo4jStore(testDirectory.directory(), fileSystem, nodeCount, Standard.LATEST_NAME);
    PageCache pageCache = pageCacheRule.getPageCache(fileSystem);
    CoreBootstrapper bootstrapper = new CoreBootstrapper(classicNeo4jStore, pageCache, fileSystem, Config.defaults(), NullLogProvider.getInstance());
    // when
    Set<MemberId> membership = asSet(randomMember(), randomMember(), randomMember());
    CoreSnapshot snapshot = bootstrapper.bootstrap(membership);
    // then
    assertEquals(nodeCount, ((IdAllocationState) snapshot.get(CoreStateType.ID_ALLOCATION)).firstUnallocated(IdType.NODE));
    /* Bootstrapped state is created in RAFT land at index -1 and term -1. */
    assertEquals(0, snapshot.prevIndex());
    assertEquals(0, snapshot.prevTerm());
    /* Lock is initially not taken. */
    assertEquals(new ReplicatedLockTokenState(), snapshot.get(CoreStateType.LOCK_TOKEN));
    /* Raft has the bootstrapped set of members initially. */
    assertEquals(membership, ((RaftCoreState) snapshot.get(CoreStateType.RAFT_CORE_STATE)).committed().members());
    /* The session state is initially empty. */
    assertEquals(new GlobalSessionTrackerState(), snapshot.get(CoreStateType.SESSION_TRACKER));
    LastCommittedIndexFinder lastCommittedIndexFinder = new LastCommittedIndexFinder(new ReadOnlyTransactionIdStore(pageCache, classicNeo4jStore), new ReadOnlyTransactionStore(pageCache, fileSystem, classicNeo4jStore, new Monitors()), NullLogProvider.getInstance());
    long lastCommittedIndex = lastCommittedIndexFinder.getLastCommittedIndex();
    assertEquals(-1, lastCommittedIndex);
}
Also used : FileSystemAbstraction(org.neo4j.io.fs.FileSystemAbstraction) LastCommittedIndexFinder(org.neo4j.causalclustering.core.state.machines.tx.LastCommittedIndexFinder) ReadOnlyTransactionStore(org.neo4j.kernel.impl.transaction.log.ReadOnlyTransactionStore) GlobalSessionTrackerState(org.neo4j.causalclustering.core.replication.session.GlobalSessionTrackerState) MemberId(org.neo4j.causalclustering.identity.MemberId) CoreSnapshot(org.neo4j.causalclustering.core.state.snapshot.CoreSnapshot) ReadOnlyTransactionIdStore(org.neo4j.kernel.impl.transaction.log.ReadOnlyTransactionIdStore) RaftCoreState(org.neo4j.causalclustering.core.state.snapshot.RaftCoreState) Monitors(org.neo4j.kernel.monitoring.Monitors) ReplicatedLockTokenState(org.neo4j.causalclustering.core.state.machines.locks.ReplicatedLockTokenState) File(java.io.File) PageCache(org.neo4j.io.pagecache.PageCache) Test(org.junit.Test)

Aggregations

File (java.io.File)1 Test (org.junit.Test)1 GlobalSessionTrackerState (org.neo4j.causalclustering.core.replication.session.GlobalSessionTrackerState)1 ReplicatedLockTokenState (org.neo4j.causalclustering.core.state.machines.locks.ReplicatedLockTokenState)1 LastCommittedIndexFinder (org.neo4j.causalclustering.core.state.machines.tx.LastCommittedIndexFinder)1 CoreSnapshot (org.neo4j.causalclustering.core.state.snapshot.CoreSnapshot)1 RaftCoreState (org.neo4j.causalclustering.core.state.snapshot.RaftCoreState)1 MemberId (org.neo4j.causalclustering.identity.MemberId)1 FileSystemAbstraction (org.neo4j.io.fs.FileSystemAbstraction)1 PageCache (org.neo4j.io.pagecache.PageCache)1 ReadOnlyTransactionIdStore (org.neo4j.kernel.impl.transaction.log.ReadOnlyTransactionIdStore)1 ReadOnlyTransactionStore (org.neo4j.kernel.impl.transaction.log.ReadOnlyTransactionStore)1 Monitors (org.neo4j.kernel.monitoring.Monitors)1