Examples with ServerState org.apache.ratis.server.impl.ServerState used on opensource projects

Example 1 with ServerState

use of org.apache.ratis.server.impl.ServerState in project incubator-ratis by apache.

the class TestCacheEviction method testEvictionInSegmentedLog.

@Test
public void testEvictionInSegmentedLog() throws Exception {
    final RaftProperties prop = new RaftProperties();
    prop.setClass(MiniRaftCluster.STATEMACHINE_CLASS_KEY, SimpleStateMachine4Testing.class, StateMachine.class);
    RaftServerConfigKeys.Log.setSegmentSizeMax(prop, SizeInBytes.valueOf("8KB"));
    RaftServerConfigKeys.Log.setPreallocatedSize(prop, SizeInBytes.valueOf("8KB"));
    final RaftPeerId peerId = RaftPeerId.valueOf("s0");
    final int maxCachedNum = RaftServerConfigKeys.Log.maxCachedSegmentNum(prop);
    File storageDir = getTestDir();
    RaftServerConfigKeys.setStorageDir(prop, storageDir);
    RaftStorage storage = new RaftStorage(storageDir, RaftServerConstants.StartupOption.REGULAR);
    RaftServerImpl server = Mockito.mock(RaftServerImpl.class);
    ServerState state = Mockito.mock(ServerState.class);
    Mockito.when(server.getState()).thenReturn(state);
    Mockito.when(server.getFollowerNextIndices()).thenReturn(new long[] {});
    Mockito.when(state.getLastAppliedIndex()).thenReturn(0L);
    SegmentedRaftLog raftLog = new SegmentedRaftLog(peerId, server, storage, -1, prop);
    raftLog.open(RaftServerConstants.INVALID_LOG_INDEX, null);
    List<SegmentRange> slist = TestSegmentedRaftLog.prepareRanges(maxCachedNum, 7, 0);
    LogEntryProto[] entries = generateEntries(slist);
    raftLog.append(entries).forEach(CompletableFuture::join);
    // check the current cached segment number: the last segment is still open
    Assert.assertEquals(maxCachedNum - 1, raftLog.getRaftLogCache().getCachedSegmentNum());
    Mockito.when(server.getFollowerNextIndices()).thenReturn(new long[] { 21, 40, 40 });
    Mockito.when(state.getLastAppliedIndex()).thenReturn(35L);
    slist = TestSegmentedRaftLog.prepareRanges(2, 7, 7 * maxCachedNum);
    entries = generateEntries(slist);
    raftLog.append(entries).forEach(CompletableFuture::join);
    // check the cached segment number again. since the slowest follower is on
    // index 21, the eviction should happen and evict 3 segments
    Assert.assertEquals(maxCachedNum + 1 - 3, raftLog.getRaftLogCache().getCachedSegmentNum());
}