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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hudi.common.table.timeline;
import org.apache.hudi.common.table.timeline.HoodieInstant.State;
import org.apache.hudi.common.util.CollectionUtils;
import org.apache.hudi.common.util.Option;
import org.apache.hudi.common.util.StringUtils;
import org.apache.hudi.exception.HoodieException;
import java.io.Serializable;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.List;
import java.util.Set;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static java.util.Collections.reverse;
import static org.apache.hudi.common.table.timeline.HoodieTimeline.compareTimestamps;
/**
* HoodieDefaultTimeline is a default implementation of the HoodieTimeline. It provides methods to inspect a
* List[HoodieInstant]. Function to get the details of the instant is passed in as a lambda.
*
* @see HoodieTimeline
*/
public class HoodieDefaultTimeline implements HoodieTimeline {
private static final long serialVersionUID = 1L;
private static final String HASHING_ALGORITHM = "SHA-256";
protected transient Function> details;
private List instants;
private String timelineHash;
public HoodieDefaultTimeline(Stream instants, Function> details) {
this.details = details;
setInstants(instants.collect(Collectors.toList()));
}
public void setInstants(List instants) {
this.instants = instants;
final MessageDigest md;
try {
md = MessageDigest.getInstance(HASHING_ALGORITHM);
this.instants.forEach(i -> md
.update(StringUtils.joinUsingDelim("_", i.getTimestamp(), i.getAction(), i.getState().name()).getBytes()));
} catch (NoSuchAlgorithmException nse) {
throw new HoodieException(nse);
}
this.timelineHash = StringUtils.toHexString(md.digest());
}
/**
* For serializing and de-serializing.
*
* @deprecated
*/
public HoodieDefaultTimeline() {
}
@Override
public HoodieTimeline filterInflights() {
return new HoodieDefaultTimeline(instants.stream().filter(HoodieInstant::isInflight), details);
}
@Override
public HoodieTimeline filterInflightsAndRequested() {
return new HoodieDefaultTimeline(
instants.stream().filter(i -> i.getState().equals(State.REQUESTED) || i.getState().equals(State.INFLIGHT)),
details);
}
@Override
public HoodieTimeline filterPendingExcludingCompaction() {
return new HoodieDefaultTimeline(instants.stream().filter(instant -> (!instant.isCompleted())
&& (!instant.getAction().equals(HoodieTimeline.COMPACTION_ACTION))), details);
}
@Override
public HoodieTimeline filterCompletedInstants() {
return new HoodieDefaultTimeline(instants.stream().filter(HoodieInstant::isCompleted), details);
}
@Override
public HoodieTimeline filterCompletedAndCompactionInstants() {
return new HoodieDefaultTimeline(instants.stream().filter(s -> s.isCompleted()
|| s.getAction().equals(HoodieTimeline.COMPACTION_ACTION)), details);
}
@Override
public HoodieDefaultTimeline getWriteTimeline() {
Set validActions = CollectionUtils.createSet(COMMIT_ACTION, DELTA_COMMIT_ACTION, COMPACTION_ACTION, REPLACE_COMMIT_ACTION);
return new HoodieDefaultTimeline(instants.stream().filter(s -> validActions.contains(s.getAction())), details);
}
@Override
public HoodieTimeline getContiguousCompletedWriteTimeline() {
Option earliestPending = getWriteTimeline().filterInflightsAndRequested().firstInstant();
if (earliestPending.isPresent()) {
return getWriteTimeline().filterCompletedInstants()
.filter(instant -> compareTimestamps(instant.getTimestamp(), LESSER_THAN, earliestPending.get().getTimestamp()));
}
return getWriteTimeline().filterCompletedInstants();
}
@Override
public HoodieTimeline getCompletedReplaceTimeline() {
return new HoodieDefaultTimeline(
instants.stream().filter(s -> s.getAction().equals(REPLACE_COMMIT_ACTION)).filter(HoodieInstant::isCompleted), details);
}
@Override
public HoodieTimeline filterPendingReplaceTimeline() {
return new HoodieDefaultTimeline(instants.stream().filter(
s -> s.getAction().equals(HoodieTimeline.REPLACE_COMMIT_ACTION) && !s.isCompleted()), details);
}
@Override
public HoodieTimeline filterPendingRollbackTimeline() {
return new HoodieDefaultTimeline(instants.stream().filter(
s -> s.getAction().equals(HoodieTimeline.ROLLBACK_ACTION) && !s.isCompleted()), details);
}
@Override
public HoodieTimeline filterPendingCompactionTimeline() {
return new HoodieDefaultTimeline(
instants.stream().filter(s -> s.getAction().equals(HoodieTimeline.COMPACTION_ACTION) && !s.isCompleted()), details);
}
@Override
public HoodieDefaultTimeline findInstantsInRange(String startTs, String endTs) {
return new HoodieDefaultTimeline(
instants.stream().filter(s -> HoodieTimeline.isInRange(s.getTimestamp(), startTs, endTs)), details);
}
@Override
public HoodieDefaultTimeline findInstantsAfter(String instantTime, int numCommits) {
return new HoodieDefaultTimeline(instants.stream()
.filter(s -> compareTimestamps(s.getTimestamp(), GREATER_THAN, instantTime)).limit(numCommits),
details);
}
@Override
public HoodieTimeline findInstantsAfter(String instantTime) {
return new HoodieDefaultTimeline(instants.stream()
.filter(s -> compareTimestamps(s.getTimestamp(), GREATER_THAN, instantTime)), details);
}
@Override
public HoodieDefaultTimeline findInstantsAfterOrEquals(String commitTime, int numCommits) {
return new HoodieDefaultTimeline(instants.stream()
.filter(s -> compareTimestamps(s.getTimestamp(), GREATER_THAN_OR_EQUALS, commitTime))
.limit(numCommits), details);
}
@Override
public HoodieDefaultTimeline findInstantsBefore(String instantTime) {
return new HoodieDefaultTimeline(instants.stream()
.filter(s -> compareTimestamps(s.getTimestamp(), LESSER_THAN, instantTime)),
details);
}
@Override
public HoodieDefaultTimeline findInstantsBeforeOrEquals(String instantTime) {
return new HoodieDefaultTimeline(instants.stream()
.filter(s -> compareTimestamps(s.getTimestamp(), LESSER_THAN_OR_EQUALS, instantTime)),
details);
}
@Override
public HoodieTimeline filter(Predicate filter) {
return new HoodieDefaultTimeline(instants.stream().filter(filter), details);
}
@Override
public HoodieTimeline filterPendingIndexTimeline() {
return new HoodieDefaultTimeline(instants.stream().filter(s -> s.getAction().equals(INDEXING_ACTION) && !s.isCompleted()), details);
}
@Override
public HoodieTimeline filterCompletedIndexTimeline() {
return new HoodieDefaultTimeline(instants.stream().filter(s -> s.getAction().equals(INDEXING_ACTION) && s.isCompleted()), details);
}
/**
* Get all instants (commits, delta commits) that produce new data, in the active timeline.
*/
public HoodieTimeline getCommitsTimeline() {
return getTimelineOfActions(CollectionUtils.createSet(COMMIT_ACTION, DELTA_COMMIT_ACTION, REPLACE_COMMIT_ACTION));
}
/**
* Get all instants (commits, delta commits, compaction, clean, savepoint, rollback, replace commits, index) that result in actions,
* in the active timeline.
*/
public HoodieTimeline getAllCommitsTimeline() {
return getTimelineOfActions(CollectionUtils.createSet(COMMIT_ACTION, DELTA_COMMIT_ACTION,
CLEAN_ACTION, COMPACTION_ACTION, SAVEPOINT_ACTION, ROLLBACK_ACTION, REPLACE_COMMIT_ACTION, INDEXING_ACTION));
}
/**
* Get only pure commits (inflight and completed) in the active timeline.
*/
public HoodieTimeline getCommitTimeline() {
return getTimelineOfActions(CollectionUtils.createSet(COMMIT_ACTION, REPLACE_COMMIT_ACTION));
}
/**
* Get only the delta commits (inflight and completed) in the active timeline.
*/
public HoodieTimeline getDeltaCommitTimeline() {
return new HoodieDefaultTimeline(filterInstantsByAction(DELTA_COMMIT_ACTION),
(Function> & Serializable) this::getInstantDetails);
}
/**
* Get a timeline of a specific set of actions. useful to create a merged timeline of multiple actions.
*
* @param actions actions allowed in the timeline
*/
public HoodieTimeline getTimelineOfActions(Set actions) {
return new HoodieDefaultTimeline(getInstants().filter(s -> actions.contains(s.getAction())),
(Function> & Serializable) this::getInstantDetails);
}
/**
* Get only the cleaner action (inflight and completed) in the active timeline.
*/
public HoodieTimeline getCleanerTimeline() {
return new HoodieDefaultTimeline(filterInstantsByAction(CLEAN_ACTION),
(Function> & Serializable) this::getInstantDetails);
}
/**
* Get only the rollback action (inflight and completed) in the active timeline.
*/
public HoodieTimeline getRollbackTimeline() {
return new HoodieDefaultTimeline(filterInstantsByAction(ROLLBACK_ACTION),
(Function> & Serializable) this::getInstantDetails);
}
/**
* Get only the rollback and restore action (inflight and completed) in the active timeline.
*/
public HoodieTimeline getRollbackAndRestoreTimeline() {
return getTimelineOfActions(CollectionUtils.createSet(ROLLBACK_ACTION, RESTORE_ACTION));
}
/**
* Get only the save point action (inflight and completed) in the active timeline.
*/
public HoodieTimeline getSavePointTimeline() {
return new HoodieDefaultTimeline(filterInstantsByAction(SAVEPOINT_ACTION),
(Function> & Serializable) this::getInstantDetails);
}
/**
* Get only the restore action (inflight and completed) in the active timeline.
*/
public HoodieTimeline getRestoreTimeline() {
return new HoodieDefaultTimeline(filterInstantsByAction(RESTORE_ACTION),
(Function> & Serializable) this::getInstantDetails);
}
protected Stream filterInstantsByAction(String action) {
return getInstants().filter(s -> s.getAction().equals(action));
}
@Override
public boolean empty() {
return !instants.stream().findFirst().isPresent();
}
@Override
public int countInstants() {
return instants.size();
}
@Override
public Option firstInstant() {
return Option.fromJavaOptional(instants.stream().findFirst());
}
@Override
public Option firstInstant(String action, State state) {
return Option.fromJavaOptional(instants.stream()
.filter(s -> action.equals(s.getAction()) && state.equals(s.getState())).findFirst());
}
@Override
public Option nthInstant(int n) {
if (empty() || n >= countInstants()) {
return Option.empty();
}
return Option.of(instants.get(n));
}
@Override
public Option lastInstant() {
return empty() ? Option.empty() : nthInstant(countInstants() - 1);
}
@Override
public Option nthFromLastInstant(int n) {
if (countInstants() < n + 1) {
return Option.empty();
}
return nthInstant(countInstants() - 1 - n);
}
@Override
public boolean containsInstant(HoodieInstant instant) {
return instants.stream().anyMatch(s -> s.equals(instant));
}
@Override
public boolean containsInstant(String ts) {
return instants.stream().anyMatch(s -> s.getTimestamp().equals(ts));
}
@Override
public boolean containsOrBeforeTimelineStarts(String instant) {
return instants.stream().anyMatch(s -> s.getTimestamp().equals(instant)) || isBeforeTimelineStarts(instant);
}
@Override
public String getTimelineHash() {
return timelineHash;
}
@Override
public Stream getInstants() {
return instants.stream();
}
@Override
public Stream getReverseOrderedInstants() {
List instants = getInstants().collect(Collectors.toList());
reverse(instants);
return instants.stream();
}
@Override
public boolean isBeforeTimelineStarts(String instant) {
Option firstNonSavepointCommit = getFirstNonSavepointCommit();
return firstNonSavepointCommit.isPresent()
&& compareTimestamps(instant, LESSER_THAN, firstNonSavepointCommit.get().getTimestamp());
}
public Option getFirstNonSavepointCommit() {
Option firstCommit = firstInstant();
Set savepointTimestamps = instants.stream()
.filter(entry -> entry.getAction().equals(HoodieTimeline.SAVEPOINT_ACTION))
.map(HoodieInstant::getTimestamp)
.collect(Collectors.toSet());
Option firstNonSavepointCommit = firstCommit;
if (!savepointTimestamps.isEmpty()) {
// There are chances that there could be holes in the timeline due to archival and savepoint interplay.
// So, the first non-savepoint commit is considered as beginning of the active timeline.
firstNonSavepointCommit = Option.fromJavaOptional(instants.stream()
.filter(entry -> !savepointTimestamps.contains(entry.getTimestamp()))
.findFirst());
}
return firstNonSavepointCommit;
}
@Override
public Option getInstantDetails(HoodieInstant instant) {
return details.apply(instant);
}
@Override
public boolean isEmpty(HoodieInstant instant) {
return getInstantDetails(instant).get().length == 0;
}
@Override
public String toString() {
return this.getClass().getName() + ": " + instants.stream().map(Object::toString).collect(Collectors.joining(","));
}
/**
* Merge this timeline with the given timeline.
*/
public HoodieDefaultTimeline mergeTimeline(HoodieDefaultTimeline timeline) {
Stream instantStream = Stream.concat(instants.stream(), timeline.getInstants()).sorted();
Function> details = instant -> {
if (instants.stream().anyMatch(i -> i.equals(instant))) {
return this.getInstantDetails(instant);
} else {
return timeline.getInstantDetails(instant);
}
};
return new HoodieDefaultTimeline(instantStream, details);
}
}
