package org.opendaylight.controller.cluster.raft;
-import akka.japi.Procedure;
import akka.persistence.SnapshotSelectionCriteria;
import com.google.common.annotations.VisibleForTesting;
import java.util.List;
+import java.util.function.Consumer;
+import org.opendaylight.controller.cluster.raft.base.messages.ApplySnapshot;
import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
import org.opendaylight.controller.cluster.raft.base.messages.SendInstallSnapshot;
+import org.opendaylight.controller.cluster.raft.base.messages.SnapshotComplete;
import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
import org.slf4j.Logger;
private CaptureSnapshot captureSnapshot;
private long lastSequenceNumber = -1;
- private Procedure<Void> createSnapshotProcedure;
+ private Runnable createSnapshotProcedure;
- private Snapshot applySnapshot;
- private Procedure<byte[]> applySnapshotProcedure;
+ private ApplySnapshot applySnapshot;
+ private Consumer<byte[]> applySnapshotProcedure;
public SnapshotManager(RaftActorContext context, Logger logger) {
this.context = context;
this.LOG = logger;
}
+ public boolean isApplying() {
+ return applySnapshot != null;
+ }
+
@Override
public boolean isCapturing() {
return currentState.isCapturing();
}
@Override
- public void apply(Snapshot snapshot) {
+ public void apply(ApplySnapshot snapshot) {
currentState.apply(snapshot);
}
@Override
- public void persist(byte[] snapshotBytes, RaftActorBehavior currentBehavior, long totalMemory) {
- currentState.persist(snapshotBytes, currentBehavior, totalMemory);
+ public void persist(final byte[] snapshotBytes, final long totalMemory) {
+ currentState.persist(snapshotBytes, totalMemory);
}
@Override
- public void commit(long sequenceNumber, RaftActorBehavior currentBehavior) {
- currentState.commit(sequenceNumber, currentBehavior);
+ public void commit(final long sequenceNumber) {
+ currentState.commit(sequenceNumber);
}
@Override
}
@Override
- public long trimLog(long desiredTrimIndex, RaftActorBehavior currentBehavior) {
- return currentState.trimLog(desiredTrimIndex, currentBehavior);
+ public long trimLog(final long desiredTrimIndex) {
+ return currentState.trimLog(desiredTrimIndex);
}
- public void setCreateSnapshotCallable(Procedure<Void> createSnapshotProcedure) {
+ public void setCreateSnapshotRunnable(Runnable createSnapshotProcedure) {
this.createSnapshotProcedure = createSnapshotProcedure;
}
- public void setApplySnapshotProcedure(Procedure<byte[]> applySnapshotProcedure) {
+ public void setApplySnapshotConsumer(Consumer<byte[]> applySnapshotProcedure) {
this.applySnapshotProcedure = applySnapshotProcedure;
}
}
private boolean hasFollowers(){
- return context.getPeerAddresses().keySet().size() > 0;
+ return context.hasFollowers();
}
private String persistenceId(){
return context.getId();
}
+ public CaptureSnapshot newCaptureSnapshot(ReplicatedLogEntry lastLogEntry, long replicatedToAllIndex,
+ boolean installSnapshotInitiated) {
+ TermInformationReader lastAppliedTermInfoReader =
+ lastAppliedTermInformationReader.init(context.getReplicatedLog(), context.getLastApplied(),
+ lastLogEntry, hasFollowers());
+
+ long lastAppliedIndex = lastAppliedTermInfoReader.getIndex();
+ long lastAppliedTerm = lastAppliedTermInfoReader.getTerm();
+
+ TermInformationReader replicatedToAllTermInfoReader =
+ replicatedToAllTermInformationReader.init(context.getReplicatedLog(), replicatedToAllIndex);
+
+ long newReplicatedToAllIndex = replicatedToAllTermInfoReader.getIndex();
+ long newReplicatedToAllTerm = replicatedToAllTermInfoReader.getTerm();
+
+ List<ReplicatedLogEntry> unAppliedEntries = context.getReplicatedLog().getFrom(lastAppliedIndex + 1);
+
+ long lastLogEntryIndex = lastAppliedIndex;
+ long lastLogEntryTerm = lastAppliedTerm;
+ if(lastLogEntry != null) {
+ lastLogEntryIndex = lastLogEntry.getIndex();
+ lastLogEntryTerm = lastLogEntry.getTerm();
+ } else {
+ LOG.debug("{}: Capturing Snapshot : lastLogEntry is null. Using lastAppliedIndex {} and lastAppliedTerm {} instead.",
+ persistenceId(), lastAppliedIndex, lastAppliedTerm);
+ }
+
+ return new CaptureSnapshot(lastLogEntryIndex, lastLogEntryTerm, lastAppliedIndex, lastAppliedTerm,
+ newReplicatedToAllIndex, newReplicatedToAllTerm, unAppliedEntries, installSnapshotInitiated);
+ }
+
private class AbstractSnapshotState implements SnapshotState {
@Override
}
@Override
- public void apply(Snapshot snapshot) {
+ public void apply(ApplySnapshot snapshot) {
LOG.debug("apply should not be called in state {}", this);
}
@Override
- public void persist(byte[] snapshotBytes, RaftActorBehavior currentBehavior, long totalMemory) {
+ public void persist(final byte[] snapshotBytes, final long totalMemory) {
LOG.debug("persist should not be called in state {}", this);
}
@Override
- public void commit(long sequenceNumber, RaftActorBehavior currentBehavior) {
+ public void commit(final long sequenceNumber) {
LOG.debug("commit should not be called in state {}", this);
}
}
@Override
- public long trimLog(long desiredTrimIndex, RaftActorBehavior currentBehavior) {
+ public long trimLog(final long desiredTrimIndex) {
LOG.debug("trimLog should not be called in state {}", this);
return -1;
}
- protected long doTrimLog(long desiredTrimIndex, RaftActorBehavior currentBehavior){
+ protected long doTrimLog(final long desiredTrimIndex) {
// we would want to keep the lastApplied as its used while capturing snapshots
long lastApplied = context.getLastApplied();
long tempMin = Math.min(desiredTrimIndex, (lastApplied > -1 ? lastApplied - 1 : -1));
context.getReplicatedLog().snapshotPreCommit(tempMin, entry.getTerm());
context.getReplicatedLog().snapshotCommit();
return tempMin;
- } else if(tempMin > currentBehavior.getReplicatedToAllIndex()) {
+ }
+
+ final RaftActorBehavior currentBehavior = context.getCurrentBehavior();
+ if(tempMin > currentBehavior.getReplicatedToAllIndex()) {
// It's possible a follower was lagging and an install snapshot advanced its match index past
// the current replicatedToAllIndex. Since the follower is now caught up we should advance the
// replicatedToAllIndex (to tempMin). The fact that tempMin wasn't found in the log is likely
}
private boolean capture(ReplicatedLogEntry lastLogEntry, long replicatedToAllIndex, String targetFollower) {
- TermInformationReader lastAppliedTermInfoReader =
- lastAppliedTermInformationReader.init(context.getReplicatedLog(), context.getLastApplied(),
- lastLogEntry, hasFollowers());
-
- long lastAppliedIndex = lastAppliedTermInfoReader.getIndex();
- long lastAppliedTerm = lastAppliedTermInfoReader.getTerm();
-
- TermInformationReader replicatedToAllTermInfoReader =
- replicatedToAllTermInformationReader.init(context.getReplicatedLog(), replicatedToAllIndex);
-
- long newReplicatedToAllIndex = replicatedToAllTermInfoReader.getIndex();
- long newReplicatedToAllTerm = replicatedToAllTermInfoReader.getTerm();
-
- // send a CaptureSnapshot to self to make the expensive operation async.
-
- List<ReplicatedLogEntry> unAppliedEntries = context.getReplicatedLog().getFrom(lastAppliedIndex + 1);
-
- captureSnapshot = new CaptureSnapshot(lastLogEntry.getIndex(),
- lastLogEntry.getTerm(), lastAppliedIndex, lastAppliedTerm,
- newReplicatedToAllIndex, newReplicatedToAllTerm, unAppliedEntries, targetFollower != null);
+ captureSnapshot = newCaptureSnapshot(lastLogEntry, replicatedToAllIndex, targetFollower != null);
if(captureSnapshot.isInstallSnapshotInitiated()) {
LOG.info("{}: Initiating snapshot capture {} to install on {}",
lastSequenceNumber = context.getPersistenceProvider().getLastSequenceNumber();
- LOG.debug("lastSequenceNumber prior to capture: {}", lastSequenceNumber);
+ LOG.debug("{}: lastSequenceNumber prior to capture: {}", persistenceId(), lastSequenceNumber);
SnapshotManager.this.currentState = CREATING;
try {
- createSnapshotProcedure.apply(null);
+ createSnapshotProcedure.run();
} catch (Exception e) {
SnapshotManager.this.currentState = IDLE;
LOG.error("Error creating snapshot", e);
}
@Override
- public void apply(Snapshot snapshot) {
- applySnapshot = snapshot;
+ public void apply(ApplySnapshot applySnapshot) {
+ SnapshotManager.this.applySnapshot = applySnapshot;
lastSequenceNumber = context.getPersistenceProvider().getLastSequenceNumber();
LOG.debug("lastSequenceNumber prior to persisting applied snapshot: {}", lastSequenceNumber);
- context.getPersistenceProvider().saveSnapshot(snapshot);
+ context.getPersistenceProvider().saveSnapshot(applySnapshot.getSnapshot());
SnapshotManager.this.currentState = PERSISTING;
}
}
@Override
- public long trimLog(long desiredTrimIndex, RaftActorBehavior currentBehavior) {
- return doTrimLog(desiredTrimIndex, currentBehavior);
+ public long trimLog(final long desiredTrimIndex) {
+ return doTrimLog(desiredTrimIndex);
}
}
private class Creating extends AbstractSnapshotState {
@Override
- public void persist(byte[] snapshotBytes, RaftActorBehavior currentBehavior, long totalMemory) {
+ public void persist(final byte[] snapshotBytes, final long totalMemory) {
// create a snapshot object from the state provided and save it
// when snapshot is saved async, SaveSnapshotSuccess is raised.
Snapshot snapshot = Snapshot.create(snapshotBytes,
captureSnapshot.getUnAppliedEntries(),
captureSnapshot.getLastIndex(), captureSnapshot.getLastTerm(),
- captureSnapshot.getLastAppliedIndex(), captureSnapshot.getLastAppliedTerm());
+ captureSnapshot.getLastAppliedIndex(), captureSnapshot.getLastAppliedTerm(),
+ context.getTermInformation().getCurrentTerm(),
+ context.getTermInformation().getVotedFor(), context.getPeerServerInfo(true));
context.getPersistenceProvider().saveSnapshot(snapshot);
- LOG.info("{}: Persisting of snapshot done: {}", persistenceId(), snapshot.getLogMessage());
+ LOG.info("{}: Persisting of snapshot done: {}", persistenceId(), snapshot);
long dataThreshold = totalMemory *
context.getConfigParams().getSnapshotDataThresholdPercentage() / 100;
boolean logSizeExceededSnapshotBatchCount =
context.getReplicatedLog().size() >= context.getConfigParams().getSnapshotBatchCount();
-LOG.debug("Log size: {}, getSnapshotBatchCount: {}",context.getReplicatedLog().size(),context.getConfigParams().getSnapshotBatchCount());
+
+ final RaftActorBehavior currentBehavior = context.getCurrentBehavior();
if (dataSizeThresholdExceeded || logSizeExceededSnapshotBatchCount) {
if(LOG.isDebugEnabled()) {
if(dataSizeThresholdExceeded) {
private class Persisting extends AbstractSnapshotState {
@Override
- public void commit(long sequenceNumber, RaftActorBehavior currentBehavior) {
- LOG.debug("Snapshot success sequence number:", sequenceNumber);
+ public void commit(final long sequenceNumber) {
+ LOG.debug("{}: Snapshot success - sequence number: {}", persistenceId(), sequenceNumber);
if(applySnapshot != null) {
try {
- applySnapshotProcedure.apply(applySnapshot.getState());
+ Snapshot snapshot = applySnapshot.getSnapshot();
//clears the followers log, sets the snapshot index to ensure adjusted-index works
- context.setReplicatedLog(ReplicatedLogImpl.newInstance(applySnapshot, context, currentBehavior));
- context.setLastApplied(applySnapshot.getLastAppliedIndex());
- context.setCommitIndex(applySnapshot.getLastAppliedIndex());
+ context.setReplicatedLog(ReplicatedLogImpl.newInstance(snapshot, context));
+ context.setLastApplied(snapshot.getLastAppliedIndex());
+ context.setCommitIndex(snapshot.getLastAppliedIndex());
+ context.getTermInformation().update(snapshot.getElectionTerm(), snapshot.getElectionVotedFor());
+
+ if(snapshot.getState().length > 0 ) {
+ applySnapshotProcedure.accept(snapshot.getState());
+ }
+
+ applySnapshot.getCallback().onSuccess();
} catch (Exception e) {
- LOG.error("Error applying snapshot", e);
+ LOG.error("{}: Error applying snapshot", context.getId(), e);
}
} else {
context.getReplicatedLog().snapshotCommit();
}
context.getPersistenceProvider().deleteSnapshots(new SnapshotSelectionCriteria(
- sequenceNumber - context.getConfigParams().getSnapshotBatchCount(), 43200000));
+ sequenceNumber - context.getConfigParams().getSnapshotBatchCount(), Long.MAX_VALUE, 0L, 0L));
context.getPersistenceProvider().deleteMessages(lastSequenceNumber);
- lastSequenceNumber = -1;
- applySnapshot = null;
- SnapshotManager.this.currentState = IDLE;
+ snapshotComplete();
}
@Override
context.getReplicatedLog().getSnapshotIndex(),
context.getReplicatedLog().getSnapshotTerm(),
context.getReplicatedLog().size());
+ } else {
+ applySnapshot.getCallback().onFailure();
}
+ snapshotComplete();
+ }
+
+ private void snapshotComplete() {
lastSequenceNumber = -1;
applySnapshot = null;
SnapshotManager.this.currentState = IDLE;
+
+ context.getActor().tell(SnapshotComplete.INSTANCE, context.getActor());
}
@Override
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